1 /* 2 * Copyright (C) 2006 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.view; 18 19 import android.animation.AnimatorInflater; 20 import android.animation.StateListAnimator; 21 import android.annotation.CallSuper; 22 import android.annotation.ColorInt; 23 import android.annotation.DrawableRes; 24 import android.annotation.FloatRange; 25 import android.annotation.IdRes; 26 import android.annotation.IntDef; 27 import android.annotation.LayoutRes; 28 import android.annotation.NonNull; 29 import android.annotation.Nullable; 30 import android.annotation.Size; 31 import android.annotation.UiThread; 32 import android.content.ClipData; 33 import android.content.Context; 34 import android.content.ContextWrapper; 35 import android.content.Intent; 36 import android.content.res.ColorStateList; 37 import android.content.res.Configuration; 38 import android.content.res.Resources; 39 import android.content.res.TypedArray; 40 import android.graphics.Bitmap; 41 import android.graphics.Canvas; 42 import android.graphics.Insets; 43 import android.graphics.Interpolator; 44 import android.graphics.LinearGradient; 45 import android.graphics.Matrix; 46 import android.graphics.Outline; 47 import android.graphics.Paint; 48 import android.graphics.PixelFormat; 49 import android.graphics.Point; 50 import android.graphics.PorterDuff; 51 import android.graphics.PorterDuffXfermode; 52 import android.graphics.Rect; 53 import android.graphics.RectF; 54 import android.graphics.Region; 55 import android.graphics.Shader; 56 import android.graphics.drawable.ColorDrawable; 57 import android.graphics.drawable.Drawable; 58 import android.hardware.display.DisplayManagerGlobal; 59 import android.os.Build.VERSION_CODES; 60 import android.os.Bundle; 61 import android.os.Handler; 62 import android.os.IBinder; 63 import android.os.Parcel; 64 import android.os.Parcelable; 65 import android.os.RemoteException; 66 import android.os.SystemClock; 67 import android.os.SystemProperties; 68 import android.os.Trace; 69 import android.text.TextUtils; 70 import android.util.AttributeSet; 71 import android.util.FloatProperty; 72 import android.util.LayoutDirection; 73 import android.util.Log; 74 import android.util.LongSparseLongArray; 75 import android.util.Pools.SynchronizedPool; 76 import android.util.Property; 77 import android.util.SparseArray; 78 import android.util.StateSet; 79 import android.util.SuperNotCalledException; 80 import android.util.TypedValue; 81 import android.view.ContextMenu.ContextMenuInfo; 82 import android.view.AccessibilityIterators.TextSegmentIterator; 83 import android.view.AccessibilityIterators.CharacterTextSegmentIterator; 84 import android.view.AccessibilityIterators.WordTextSegmentIterator; 85 import android.view.AccessibilityIterators.ParagraphTextSegmentIterator; 86 import android.view.accessibility.AccessibilityEvent; 87 import android.view.accessibility.AccessibilityEventSource; 88 import android.view.accessibility.AccessibilityManager; 89 import android.view.accessibility.AccessibilityNodeInfo; 90 import android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction; 91 import android.view.accessibility.AccessibilityNodeProvider; 92 import android.view.animation.Animation; 93 import android.view.animation.AnimationUtils; 94 import android.view.animation.Transformation; 95 import android.view.inputmethod.EditorInfo; 96 import android.view.inputmethod.InputConnection; 97 import android.view.inputmethod.InputMethodManager; 98 import android.widget.Checkable; 99 import android.widget.FrameLayout; 100 import android.widget.ScrollBarDrawable; 101 102 import static android.os.Build.VERSION_CODES.*; 103 import static java.lang.Math.max; 104 105 import com.android.internal.R; 106 import com.android.internal.util.Predicate; 107 import com.android.internal.view.menu.MenuBuilder; 108 import com.google.android.collect.Lists; 109 import com.google.android.collect.Maps; 110 111 import java.lang.annotation.Retention; 112 import java.lang.annotation.RetentionPolicy; 113 import java.lang.ref.WeakReference; 114 import java.lang.reflect.Field; 115 import java.lang.reflect.InvocationTargetException; 116 import java.lang.reflect.Method; 117 import java.lang.reflect.Modifier; 118 import java.util.ArrayList; 119 import java.util.Arrays; 120 import java.util.Collections; 121 import java.util.HashMap; 122 import java.util.List; 123 import java.util.Locale; 124 import java.util.Map; 125 import java.util.concurrent.CopyOnWriteArrayList; 126 import java.util.concurrent.atomic.AtomicInteger; 127 128 /** 129 * <p> 130 * This class represents the basic building block for user interface components. A View 131 * occupies a rectangular area on the screen and is responsible for drawing and 132 * event handling. View is the base class for <em>widgets</em>, which are 133 * used to create interactive UI components (buttons, text fields, etc.). The 134 * {@link android.view.ViewGroup} subclass is the base class for <em>layouts</em>, which 135 * are invisible containers that hold other Views (or other ViewGroups) and define 136 * their layout properties. 137 * </p> 138 * 139 * <div class="special reference"> 140 * <h3>Developer Guides</h3> 141 * <p>For information about using this class to develop your application's user interface, 142 * read the <a href="{@docRoot}guide/topics/ui/index.html">User Interface</a> developer guide. 143 * </div> 144 * 145 * <a name="Using"></a> 146 * <h3>Using Views</h3> 147 * <p> 148 * All of the views in a window are arranged in a single tree. You can add views 149 * either from code or by specifying a tree of views in one or more XML layout 150 * files. There are many specialized subclasses of views that act as controls or 151 * are capable of displaying text, images, or other content. 152 * </p> 153 * <p> 154 * Once you have created a tree of views, there are typically a few types of 155 * common operations you may wish to perform: 156 * <ul> 157 * <li><strong>Set properties:</strong> for example setting the text of a 158 * {@link android.widget.TextView}. The available properties and the methods 159 * that set them will vary among the different subclasses of views. Note that 160 * properties that are known at build time can be set in the XML layout 161 * files.</li> 162 * <li><strong>Set focus:</strong> The framework will handled moving focus in 163 * response to user input. To force focus to a specific view, call 164 * {@link #requestFocus}.</li> 165 * <li><strong>Set up listeners:</strong> Views allow clients to set listeners 166 * that will be notified when something interesting happens to the view. For 167 * example, all views will let you set a listener to be notified when the view 168 * gains or loses focus. You can register such a listener using 169 * {@link #setOnFocusChangeListener(android.view.View.OnFocusChangeListener)}. 170 * Other view subclasses offer more specialized listeners. For example, a Button 171 * exposes a listener to notify clients when the button is clicked.</li> 172 * <li><strong>Set visibility:</strong> You can hide or show views using 173 * {@link #setVisibility(int)}.</li> 174 * </ul> 175 * </p> 176 * <p><em> 177 * Note: The Android framework is responsible for measuring, laying out and 178 * drawing views. You should not call methods that perform these actions on 179 * views yourself unless you are actually implementing a 180 * {@link android.view.ViewGroup}. 181 * </em></p> 182 * 183 * <a name="Lifecycle"></a> 184 * <h3>Implementing a Custom View</h3> 185 * 186 * <p> 187 * To implement a custom view, you will usually begin by providing overrides for 188 * some of the standard methods that the framework calls on all views. You do 189 * not need to override all of these methods. In fact, you can start by just 190 * overriding {@link #onDraw(android.graphics.Canvas)}. 191 * <table border="2" width="85%" align="center" cellpadding="5"> 192 * <thead> 193 * <tr><th>Category</th> <th>Methods</th> <th>Description</th></tr> 194 * </thead> 195 * 196 * <tbody> 197 * <tr> 198 * <td rowspan="2">Creation</td> 199 * <td>Constructors</td> 200 * <td>There is a form of the constructor that are called when the view 201 * is created from code and a form that is called when the view is 202 * inflated from a layout file. The second form should parse and apply 203 * any attributes defined in the layout file. 204 * </td> 205 * </tr> 206 * <tr> 207 * <td><code>{@link #onFinishInflate()}</code></td> 208 * <td>Called after a view and all of its children has been inflated 209 * from XML.</td> 210 * </tr> 211 * 212 * <tr> 213 * <td rowspan="3">Layout</td> 214 * <td><code>{@link #onMeasure(int, int)}</code></td> 215 * <td>Called to determine the size requirements for this view and all 216 * of its children. 217 * </td> 218 * </tr> 219 * <tr> 220 * <td><code>{@link #onLayout(boolean, int, int, int, int)}</code></td> 221 * <td>Called when this view should assign a size and position to all 222 * of its children. 223 * </td> 224 * </tr> 225 * <tr> 226 * <td><code>{@link #onSizeChanged(int, int, int, int)}</code></td> 227 * <td>Called when the size of this view has changed. 228 * </td> 229 * </tr> 230 * 231 * <tr> 232 * <td>Drawing</td> 233 * <td><code>{@link #onDraw(android.graphics.Canvas)}</code></td> 234 * <td>Called when the view should render its content. 235 * </td> 236 * </tr> 237 * 238 * <tr> 239 * <td rowspan="4">Event processing</td> 240 * <td><code>{@link #onKeyDown(int, KeyEvent)}</code></td> 241 * <td>Called when a new hardware key event occurs. 242 * </td> 243 * </tr> 244 * <tr> 245 * <td><code>{@link #onKeyUp(int, KeyEvent)}</code></td> 246 * <td>Called when a hardware key up event occurs. 247 * </td> 248 * </tr> 249 * <tr> 250 * <td><code>{@link #onTrackballEvent(MotionEvent)}</code></td> 251 * <td>Called when a trackball motion event occurs. 252 * </td> 253 * </tr> 254 * <tr> 255 * <td><code>{@link #onTouchEvent(MotionEvent)}</code></td> 256 * <td>Called when a touch screen motion event occurs. 257 * </td> 258 * </tr> 259 * 260 * <tr> 261 * <td rowspan="2">Focus</td> 262 * <td><code>{@link #onFocusChanged(boolean, int, android.graphics.Rect)}</code></td> 263 * <td>Called when the view gains or loses focus. 264 * </td> 265 * </tr> 266 * 267 * <tr> 268 * <td><code>{@link #onWindowFocusChanged(boolean)}</code></td> 269 * <td>Called when the window containing the view gains or loses focus. 270 * </td> 271 * </tr> 272 * 273 * <tr> 274 * <td rowspan="3">Attaching</td> 275 * <td><code>{@link #onAttachedToWindow()}</code></td> 276 * <td>Called when the view is attached to a window. 277 * </td> 278 * </tr> 279 * 280 * <tr> 281 * <td><code>{@link #onDetachedFromWindow}</code></td> 282 * <td>Called when the view is detached from its window. 283 * </td> 284 * </tr> 285 * 286 * <tr> 287 * <td><code>{@link #onWindowVisibilityChanged(int)}</code></td> 288 * <td>Called when the visibility of the window containing the view 289 * has changed. 290 * </td> 291 * </tr> 292 * </tbody> 293 * 294 * </table> 295 * </p> 296 * 297 * <a name="IDs"></a> 298 * <h3>IDs</h3> 299 * Views may have an integer id associated with them. These ids are typically 300 * assigned in the layout XML files, and are used to find specific views within 301 * the view tree. A common pattern is to: 302 * <ul> 303 * <li>Define a Button in the layout file and assign it a unique ID. 304 * <pre> 305 * <Button 306 * android:id="@+id/my_button" 307 * android:layout_width="wrap_content" 308 * android:layout_height="wrap_content" 309 * android:text="@string/my_button_text"/> 310 * </pre></li> 311 * <li>From the onCreate method of an Activity, find the Button 312 * <pre class="prettyprint"> 313 * Button myButton = (Button) findViewById(R.id.my_button); 314 * </pre></li> 315 * </ul> 316 * <p> 317 * View IDs need not be unique throughout the tree, but it is good practice to 318 * ensure that they are at least unique within the part of the tree you are 319 * searching. 320 * </p> 321 * 322 * <a name="Position"></a> 323 * <h3>Position</h3> 324 * <p> 325 * The geometry of a view is that of a rectangle. A view has a location, 326 * expressed as a pair of <em>left</em> and <em>top</em> coordinates, and 327 * two dimensions, expressed as a width and a height. The unit for location 328 * and dimensions is the pixel. 329 * </p> 330 * 331 * <p> 332 * It is possible to retrieve the location of a view by invoking the methods 333 * {@link #getLeft()} and {@link #getTop()}. The former returns the left, or X, 334 * coordinate of the rectangle representing the view. The latter returns the 335 * top, or Y, coordinate of the rectangle representing the view. These methods 336 * both return the location of the view relative to its parent. For instance, 337 * when getLeft() returns 20, that means the view is located 20 pixels to the 338 * right of the left edge of its direct parent. 339 * </p> 340 * 341 * <p> 342 * In addition, several convenience methods are offered to avoid unnecessary 343 * computations, namely {@link #getRight()} and {@link #getBottom()}. 344 * These methods return the coordinates of the right and bottom edges of the 345 * rectangle representing the view. For instance, calling {@link #getRight()} 346 * is similar to the following computation: <code>getLeft() + getWidth()</code> 347 * (see <a href="#SizePaddingMargins">Size</a> for more information about the width.) 348 * </p> 349 * 350 * <a name="SizePaddingMargins"></a> 351 * <h3>Size, padding and margins</h3> 352 * <p> 353 * The size of a view is expressed with a width and a height. A view actually 354 * possess two pairs of width and height values. 355 * </p> 356 * 357 * <p> 358 * The first pair is known as <em>measured width</em> and 359 * <em>measured height</em>. These dimensions define how big a view wants to be 360 * within its parent (see <a href="#Layout">Layout</a> for more details.) The 361 * measured dimensions can be obtained by calling {@link #getMeasuredWidth()} 362 * and {@link #getMeasuredHeight()}. 363 * </p> 364 * 365 * <p> 366 * The second pair is simply known as <em>width</em> and <em>height</em>, or 367 * sometimes <em>drawing width</em> and <em>drawing height</em>. These 368 * dimensions define the actual size of the view on screen, at drawing time and 369 * after layout. These values may, but do not have to, be different from the 370 * measured width and height. The width and height can be obtained by calling 371 * {@link #getWidth()} and {@link #getHeight()}. 372 * </p> 373 * 374 * <p> 375 * To measure its dimensions, a view takes into account its padding. The padding 376 * is expressed in pixels for the left, top, right and bottom parts of the view. 377 * Padding can be used to offset the content of the view by a specific amount of 378 * pixels. For instance, a left padding of 2 will push the view's content by 379 * 2 pixels to the right of the left edge. Padding can be set using the 380 * {@link #setPadding(int, int, int, int)} or {@link #setPaddingRelative(int, int, int, int)} 381 * method and queried by calling {@link #getPaddingLeft()}, {@link #getPaddingTop()}, 382 * {@link #getPaddingRight()}, {@link #getPaddingBottom()}, {@link #getPaddingStart()}, 383 * {@link #getPaddingEnd()}. 384 * </p> 385 * 386 * <p> 387 * Even though a view can define a padding, it does not provide any support for 388 * margins. However, view groups provide such a support. Refer to 389 * {@link android.view.ViewGroup} and 390 * {@link android.view.ViewGroup.MarginLayoutParams} for further information. 391 * </p> 392 * 393 * <a name="Layout"></a> 394 * <h3>Layout</h3> 395 * <p> 396 * Layout is a two pass process: a measure pass and a layout pass. The measuring 397 * pass is implemented in {@link #measure(int, int)} and is a top-down traversal 398 * of the view tree. Each view pushes dimension specifications down the tree 399 * during the recursion. At the end of the measure pass, every view has stored 400 * its measurements. The second pass happens in 401 * {@link #layout(int,int,int,int)} and is also top-down. During 402 * this pass each parent is responsible for positioning all of its children 403 * using the sizes computed in the measure pass. 404 * </p> 405 * 406 * <p> 407 * When a view's measure() method returns, its {@link #getMeasuredWidth()} and 408 * {@link #getMeasuredHeight()} values must be set, along with those for all of 409 * that view's descendants. A view's measured width and measured height values 410 * must respect the constraints imposed by the view's parents. This guarantees 411 * that at the end of the measure pass, all parents accept all of their 412 * children's measurements. A parent view may call measure() more than once on 413 * its children. For example, the parent may measure each child once with 414 * unspecified dimensions to find out how big they want to be, then call 415 * measure() on them again with actual numbers if the sum of all the children's 416 * unconstrained sizes is too big or too small. 417 * </p> 418 * 419 * <p> 420 * The measure pass uses two classes to communicate dimensions. The 421 * {@link MeasureSpec} class is used by views to tell their parents how they 422 * want to be measured and positioned. The base LayoutParams class just 423 * describes how big the view wants to be for both width and height. For each 424 * dimension, it can specify one of: 425 * <ul> 426 * <li> an exact number 427 * <li>MATCH_PARENT, which means the view wants to be as big as its parent 428 * (minus padding) 429 * <li> WRAP_CONTENT, which means that the view wants to be just big enough to 430 * enclose its content (plus padding). 431 * </ul> 432 * There are subclasses of LayoutParams for different subclasses of ViewGroup. 433 * For example, AbsoluteLayout has its own subclass of LayoutParams which adds 434 * an X and Y value. 435 * </p> 436 * 437 * <p> 438 * MeasureSpecs are used to push requirements down the tree from parent to 439 * child. A MeasureSpec can be in one of three modes: 440 * <ul> 441 * <li>UNSPECIFIED: This is used by a parent to determine the desired dimension 442 * of a child view. For example, a LinearLayout may call measure() on its child 443 * with the height set to UNSPECIFIED and a width of EXACTLY 240 to find out how 444 * tall the child view wants to be given a width of 240 pixels. 445 * <li>EXACTLY: This is used by the parent to impose an exact size on the 446 * child. The child must use this size, and guarantee that all of its 447 * descendants will fit within this size. 448 * <li>AT_MOST: This is used by the parent to impose a maximum size on the 449 * child. The child must guarantee that it and all of its descendants will fit 450 * within this size. 451 * </ul> 452 * </p> 453 * 454 * <p> 455 * To initiate a layout, call {@link #requestLayout}. This method is typically 456 * called by a view on itself when it believes that is can no longer fit within 457 * its current bounds. 458 * </p> 459 * 460 * <a name="Drawing"></a> 461 * <h3>Drawing</h3> 462 * <p> 463 * Drawing is handled by walking the tree and recording the drawing commands of 464 * any View that needs to update. After this, the drawing commands of the 465 * entire tree are issued to screen, clipped to the newly damaged area. 466 * </p> 467 * 468 * <p> 469 * The tree is largely recorded and drawn in order, with parents drawn before 470 * (i.e., behind) their children, with siblings drawn in the order they appear 471 * in the tree. If you set a background drawable for a View, then the View will 472 * draw it before calling back to its <code>onDraw()</code> method. The child 473 * drawing order can be overridden with 474 * {@link ViewGroup#setChildrenDrawingOrderEnabled(boolean) custom child drawing order} 475 * in a ViewGroup, and with {@link #setZ(float)} custom Z values} set on Views. 476 * </p> 477 * 478 * <p> 479 * To force a view to draw, call {@link #invalidate()}. 480 * </p> 481 * 482 * <a name="EventHandlingThreading"></a> 483 * <h3>Event Handling and Threading</h3> 484 * <p> 485 * The basic cycle of a view is as follows: 486 * <ol> 487 * <li>An event comes in and is dispatched to the appropriate view. The view 488 * handles the event and notifies any listeners.</li> 489 * <li>If in the course of processing the event, the view's bounds may need 490 * to be changed, the view will call {@link #requestLayout()}.</li> 491 * <li>Similarly, if in the course of processing the event the view's appearance 492 * may need to be changed, the view will call {@link #invalidate()}.</li> 493 * <li>If either {@link #requestLayout()} or {@link #invalidate()} were called, 494 * the framework will take care of measuring, laying out, and drawing the tree 495 * as appropriate.</li> 496 * </ol> 497 * </p> 498 * 499 * <p><em>Note: The entire view tree is single threaded. You must always be on 500 * the UI thread when calling any method on any view.</em> 501 * If you are doing work on other threads and want to update the state of a view 502 * from that thread, you should use a {@link Handler}. 503 * </p> 504 * 505 * <a name="FocusHandling"></a> 506 * <h3>Focus Handling</h3> 507 * <p> 508 * The framework will handle routine focus movement in response to user input. 509 * This includes changing the focus as views are removed or hidden, or as new 510 * views become available. Views indicate their willingness to take focus 511 * through the {@link #isFocusable} method. To change whether a view can take 512 * focus, call {@link #setFocusable(boolean)}. When in touch mode (see notes below) 513 * views indicate whether they still would like focus via {@link #isFocusableInTouchMode} 514 * and can change this via {@link #setFocusableInTouchMode(boolean)}. 515 * </p> 516 * <p> 517 * Focus movement is based on an algorithm which finds the nearest neighbor in a 518 * given direction. In rare cases, the default algorithm may not match the 519 * intended behavior of the developer. In these situations, you can provide 520 * explicit overrides by using these XML attributes in the layout file: 521 * <pre> 522 * nextFocusDown 523 * nextFocusLeft 524 * nextFocusRight 525 * nextFocusUp 526 * </pre> 527 * </p> 528 * 529 * 530 * <p> 531 * To get a particular view to take focus, call {@link #requestFocus()}. 532 * </p> 533 * 534 * <a name="TouchMode"></a> 535 * <h3>Touch Mode</h3> 536 * <p> 537 * When a user is navigating a user interface via directional keys such as a D-pad, it is 538 * necessary to give focus to actionable items such as buttons so the user can see 539 * what will take input. If the device has touch capabilities, however, and the user 540 * begins interacting with the interface by touching it, it is no longer necessary to 541 * always highlight, or give focus to, a particular view. This motivates a mode 542 * for interaction named 'touch mode'. 543 * </p> 544 * <p> 545 * For a touch capable device, once the user touches the screen, the device 546 * will enter touch mode. From this point onward, only views for which 547 * {@link #isFocusableInTouchMode} is true will be focusable, such as text editing widgets. 548 * Other views that are touchable, like buttons, will not take focus when touched; they will 549 * only fire the on click listeners. 550 * </p> 551 * <p> 552 * Any time a user hits a directional key, such as a D-pad direction, the view device will 553 * exit touch mode, and find a view to take focus, so that the user may resume interacting 554 * with the user interface without touching the screen again. 555 * </p> 556 * <p> 557 * The touch mode state is maintained across {@link android.app.Activity}s. Call 558 * {@link #isInTouchMode} to see whether the device is currently in touch mode. 559 * </p> 560 * 561 * <a name="Scrolling"></a> 562 * <h3>Scrolling</h3> 563 * <p> 564 * The framework provides basic support for views that wish to internally 565 * scroll their content. This includes keeping track of the X and Y scroll 566 * offset as well as mechanisms for drawing scrollbars. See 567 * {@link #scrollBy(int, int)}, {@link #scrollTo(int, int)}, and 568 * {@link #awakenScrollBars()} for more details. 569 * </p> 570 * 571 * <a name="Tags"></a> 572 * <h3>Tags</h3> 573 * <p> 574 * Unlike IDs, tags are not used to identify views. Tags are essentially an 575 * extra piece of information that can be associated with a view. They are most 576 * often used as a convenience to store data related to views in the views 577 * themselves rather than by putting them in a separate structure. 578 * </p> 579 * 580 * <a name="Properties"></a> 581 * <h3>Properties</h3> 582 * <p> 583 * The View class exposes an {@link #ALPHA} property, as well as several transform-related 584 * properties, such as {@link #TRANSLATION_X} and {@link #TRANSLATION_Y}. These properties are 585 * available both in the {@link Property} form as well as in similarly-named setter/getter 586 * methods (such as {@link #setAlpha(float)} for {@link #ALPHA}). These properties can 587 * be used to set persistent state associated with these rendering-related properties on the view. 588 * The properties and methods can also be used in conjunction with 589 * {@link android.animation.Animator Animator}-based animations, described more in the 590 * <a href="#Animation">Animation</a> section. 591 * </p> 592 * 593 * <a name="Animation"></a> 594 * <h3>Animation</h3> 595 * <p> 596 * Starting with Android 3.0, the preferred way of animating views is to use the 597 * {@link android.animation} package APIs. These {@link android.animation.Animator Animator}-based 598 * classes change actual properties of the View object, such as {@link #setAlpha(float) alpha} and 599 * {@link #setTranslationX(float) translationX}. This behavior is contrasted to that of the pre-3.0 600 * {@link android.view.animation.Animation Animation}-based classes, which instead animate only 601 * how the view is drawn on the display. In particular, the {@link ViewPropertyAnimator} class 602 * makes animating these View properties particularly easy and efficient. 603 * </p> 604 * <p> 605 * Alternatively, you can use the pre-3.0 animation classes to animate how Views are rendered. 606 * You can attach an {@link Animation} object to a view using 607 * {@link #setAnimation(Animation)} or 608 * {@link #startAnimation(Animation)}. The animation can alter the scale, 609 * rotation, translation and alpha of a view over time. If the animation is 610 * attached to a view that has children, the animation will affect the entire 611 * subtree rooted by that node. When an animation is started, the framework will 612 * take care of redrawing the appropriate views until the animation completes. 613 * </p> 614 * 615 * <a name="Security"></a> 616 * <h3>Security</h3> 617 * <p> 618 * Sometimes it is essential that an application be able to verify that an action 619 * is being performed with the full knowledge and consent of the user, such as 620 * granting a permission request, making a purchase or clicking on an advertisement. 621 * Unfortunately, a malicious application could try to spoof the user into 622 * performing these actions, unaware, by concealing the intended purpose of the view. 623 * As a remedy, the framework offers a touch filtering mechanism that can be used to 624 * improve the security of views that provide access to sensitive functionality. 625 * </p><p> 626 * To enable touch filtering, call {@link #setFilterTouchesWhenObscured(boolean)} or set the 627 * android:filterTouchesWhenObscured layout attribute to true. When enabled, the framework 628 * will discard touches that are received whenever the view's window is obscured by 629 * another visible window. As a result, the view will not receive touches whenever a 630 * toast, dialog or other window appears above the view's window. 631 * </p><p> 632 * For more fine-grained control over security, consider overriding the 633 * {@link #onFilterTouchEventForSecurity(MotionEvent)} method to implement your own 634 * security policy. See also {@link MotionEvent#FLAG_WINDOW_IS_OBSCURED}. 635 * </p> 636 * 637 * @attr ref android.R.styleable#View_alpha 638 * @attr ref android.R.styleable#View_background 639 * @attr ref android.R.styleable#View_clickable 640 * @attr ref android.R.styleable#View_contentDescription 641 * @attr ref android.R.styleable#View_drawingCacheQuality 642 * @attr ref android.R.styleable#View_duplicateParentState 643 * @attr ref android.R.styleable#View_id 644 * @attr ref android.R.styleable#View_requiresFadingEdge 645 * @attr ref android.R.styleable#View_fadeScrollbars 646 * @attr ref android.R.styleable#View_fadingEdgeLength 647 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 648 * @attr ref android.R.styleable#View_fitsSystemWindows 649 * @attr ref android.R.styleable#View_isScrollContainer 650 * @attr ref android.R.styleable#View_focusable 651 * @attr ref android.R.styleable#View_focusableInTouchMode 652 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 653 * @attr ref android.R.styleable#View_keepScreenOn 654 * @attr ref android.R.styleable#View_layerType 655 * @attr ref android.R.styleable#View_layoutDirection 656 * @attr ref android.R.styleable#View_longClickable 657 * @attr ref android.R.styleable#View_minHeight 658 * @attr ref android.R.styleable#View_minWidth 659 * @attr ref android.R.styleable#View_nextFocusDown 660 * @attr ref android.R.styleable#View_nextFocusLeft 661 * @attr ref android.R.styleable#View_nextFocusRight 662 * @attr ref android.R.styleable#View_nextFocusUp 663 * @attr ref android.R.styleable#View_onClick 664 * @attr ref android.R.styleable#View_padding 665 * @attr ref android.R.styleable#View_paddingBottom 666 * @attr ref android.R.styleable#View_paddingLeft 667 * @attr ref android.R.styleable#View_paddingRight 668 * @attr ref android.R.styleable#View_paddingTop 669 * @attr ref android.R.styleable#View_paddingStart 670 * @attr ref android.R.styleable#View_paddingEnd 671 * @attr ref android.R.styleable#View_saveEnabled 672 * @attr ref android.R.styleable#View_rotation 673 * @attr ref android.R.styleable#View_rotationX 674 * @attr ref android.R.styleable#View_rotationY 675 * @attr ref android.R.styleable#View_scaleX 676 * @attr ref android.R.styleable#View_scaleY 677 * @attr ref android.R.styleable#View_scrollX 678 * @attr ref android.R.styleable#View_scrollY 679 * @attr ref android.R.styleable#View_scrollbarSize 680 * @attr ref android.R.styleable#View_scrollbarStyle 681 * @attr ref android.R.styleable#View_scrollbars 682 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 683 * @attr ref android.R.styleable#View_scrollbarFadeDuration 684 * @attr ref android.R.styleable#View_scrollbarTrackHorizontal 685 * @attr ref android.R.styleable#View_scrollbarThumbHorizontal 686 * @attr ref android.R.styleable#View_scrollbarThumbVertical 687 * @attr ref android.R.styleable#View_scrollbarTrackVertical 688 * @attr ref android.R.styleable#View_scrollbarAlwaysDrawHorizontalTrack 689 * @attr ref android.R.styleable#View_scrollbarAlwaysDrawVerticalTrack 690 * @attr ref android.R.styleable#View_stateListAnimator 691 * @attr ref android.R.styleable#View_transitionName 692 * @attr ref android.R.styleable#View_soundEffectsEnabled 693 * @attr ref android.R.styleable#View_tag 694 * @attr ref android.R.styleable#View_textAlignment 695 * @attr ref android.R.styleable#View_textDirection 696 * @attr ref android.R.styleable#View_transformPivotX 697 * @attr ref android.R.styleable#View_transformPivotY 698 * @attr ref android.R.styleable#View_translationX 699 * @attr ref android.R.styleable#View_translationY 700 * @attr ref android.R.styleable#View_translationZ 701 * @attr ref android.R.styleable#View_visibility 702 * 703 * @see android.view.ViewGroup 704 */ 705 @UiThread 706 public class View implements Drawable.Callback, KeyEvent.Callback, 707 AccessibilityEventSource { 708 private static final boolean DBG = false; 709 710 /** 711 * The logging tag used by this class with android.util.Log. 712 */ 713 protected static final String VIEW_LOG_TAG = "View"; 714 715 /** 716 * When set to true, apps will draw debugging information about their layouts. 717 * 718 * @hide 719 */ 720 public static final String DEBUG_LAYOUT_PROPERTY = "debug.layout"; 721 722 /** 723 * When set to true, this view will save its attribute data. 724 * 725 * @hide 726 */ 727 public static boolean mDebugViewAttributes = false; 728 729 /** 730 * Used to mark a View that has no ID. 731 */ 732 public static final int NO_ID = -1; 733 734 /** 735 * Signals that compatibility booleans have been initialized according to 736 * target SDK versions. 737 */ 738 private static boolean sCompatibilityDone = false; 739 740 /** 741 * Use the old (broken) way of building MeasureSpecs. 742 */ 743 private static boolean sUseBrokenMakeMeasureSpec = false; 744 745 /** 746 * Always return a size of 0 for MeasureSpec values with a mode of UNSPECIFIED 747 */ 748 static boolean sUseZeroUnspecifiedMeasureSpec = false; 749 750 /** 751 * Ignore any optimizations using the measure cache. 752 */ 753 private static boolean sIgnoreMeasureCache = false; 754 755 /** 756 * This view does not want keystrokes. Use with TAKES_FOCUS_MASK when 757 * calling setFlags. 758 */ 759 private static final int NOT_FOCUSABLE = 0x00000000; 760 761 /** 762 * This view wants keystrokes. Use with TAKES_FOCUS_MASK when calling 763 * setFlags. 764 */ 765 private static final int FOCUSABLE = 0x00000001; 766 767 /** 768 * Mask for use with setFlags indicating bits used for focus. 769 */ 770 private static final int FOCUSABLE_MASK = 0x00000001; 771 772 /** 773 * This view will adjust its padding to fit sytem windows (e.g. status bar) 774 */ 775 private static final int FITS_SYSTEM_WINDOWS = 0x00000002; 776 777 /** @hide */ 778 @IntDef({VISIBLE, INVISIBLE, GONE}) 779 @Retention(RetentionPolicy.SOURCE) 780 public @interface Visibility {} 781 782 /** 783 * This view is visible. 784 * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 785 * android:visibility}. 786 */ 787 public static final int VISIBLE = 0x00000000; 788 789 /** 790 * This view is invisible, but it still takes up space for layout purposes. 791 * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 792 * android:visibility}. 793 */ 794 public static final int INVISIBLE = 0x00000004; 795 796 /** 797 * This view is invisible, and it doesn't take any space for layout 798 * purposes. Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 799 * android:visibility}. 800 */ 801 public static final int GONE = 0x00000008; 802 803 /** 804 * Mask for use with setFlags indicating bits used for visibility. 805 * {@hide} 806 */ 807 static final int VISIBILITY_MASK = 0x0000000C; 808 809 private static final int[] VISIBILITY_FLAGS = {VISIBLE, INVISIBLE, GONE}; 810 811 /** 812 * This view is enabled. Interpretation varies by subclass. 813 * Use with ENABLED_MASK when calling setFlags. 814 * {@hide} 815 */ 816 static final int ENABLED = 0x00000000; 817 818 /** 819 * This view is disabled. Interpretation varies by subclass. 820 * Use with ENABLED_MASK when calling setFlags. 821 * {@hide} 822 */ 823 static final int DISABLED = 0x00000020; 824 825 /** 826 * Mask for use with setFlags indicating bits used for indicating whether 827 * this view is enabled 828 * {@hide} 829 */ 830 static final int ENABLED_MASK = 0x00000020; 831 832 /** 833 * This view won't draw. {@link #onDraw(android.graphics.Canvas)} won't be 834 * called and further optimizations will be performed. It is okay to have 835 * this flag set and a background. Use with DRAW_MASK when calling setFlags. 836 * {@hide} 837 */ 838 static final int WILL_NOT_DRAW = 0x00000080; 839 840 /** 841 * Mask for use with setFlags indicating bits used for indicating whether 842 * this view is will draw 843 * {@hide} 844 */ 845 static final int DRAW_MASK = 0x00000080; 846 847 /** 848 * <p>This view doesn't show scrollbars.</p> 849 * {@hide} 850 */ 851 static final int SCROLLBARS_NONE = 0x00000000; 852 853 /** 854 * <p>This view shows horizontal scrollbars.</p> 855 * {@hide} 856 */ 857 static final int SCROLLBARS_HORIZONTAL = 0x00000100; 858 859 /** 860 * <p>This view shows vertical scrollbars.</p> 861 * {@hide} 862 */ 863 static final int SCROLLBARS_VERTICAL = 0x00000200; 864 865 /** 866 * <p>Mask for use with setFlags indicating bits used for indicating which 867 * scrollbars are enabled.</p> 868 * {@hide} 869 */ 870 static final int SCROLLBARS_MASK = 0x00000300; 871 872 /** 873 * Indicates that the view should filter touches when its window is obscured. 874 * Refer to the class comments for more information about this security feature. 875 * {@hide} 876 */ 877 static final int FILTER_TOUCHES_WHEN_OBSCURED = 0x00000400; 878 879 /** 880 * Set for framework elements that use FITS_SYSTEM_WINDOWS, to indicate 881 * that they are optional and should be skipped if the window has 882 * requested system UI flags that ignore those insets for layout. 883 */ 884 static final int OPTIONAL_FITS_SYSTEM_WINDOWS = 0x00000800; 885 886 /** 887 * <p>This view doesn't show fading edges.</p> 888 * {@hide} 889 */ 890 static final int FADING_EDGE_NONE = 0x00000000; 891 892 /** 893 * <p>This view shows horizontal fading edges.</p> 894 * {@hide} 895 */ 896 static final int FADING_EDGE_HORIZONTAL = 0x00001000; 897 898 /** 899 * <p>This view shows vertical fading edges.</p> 900 * {@hide} 901 */ 902 static final int FADING_EDGE_VERTICAL = 0x00002000; 903 904 /** 905 * <p>Mask for use with setFlags indicating bits used for indicating which 906 * fading edges are enabled.</p> 907 * {@hide} 908 */ 909 static final int FADING_EDGE_MASK = 0x00003000; 910 911 /** 912 * <p>Indicates this view can be clicked. When clickable, a View reacts 913 * to clicks by notifying the OnClickListener.<p> 914 * {@hide} 915 */ 916 static final int CLICKABLE = 0x00004000; 917 918 /** 919 * <p>Indicates this view is caching its drawing into a bitmap.</p> 920 * {@hide} 921 */ 922 static final int DRAWING_CACHE_ENABLED = 0x00008000; 923 924 /** 925 * <p>Indicates that no icicle should be saved for this view.<p> 926 * {@hide} 927 */ 928 static final int SAVE_DISABLED = 0x000010000; 929 930 /** 931 * <p>Mask for use with setFlags indicating bits used for the saveEnabled 932 * property.</p> 933 * {@hide} 934 */ 935 static final int SAVE_DISABLED_MASK = 0x000010000; 936 937 /** 938 * <p>Indicates that no drawing cache should ever be created for this view.<p> 939 * {@hide} 940 */ 941 static final int WILL_NOT_CACHE_DRAWING = 0x000020000; 942 943 /** 944 * <p>Indicates this view can take / keep focus when int touch mode.</p> 945 * {@hide} 946 */ 947 static final int FOCUSABLE_IN_TOUCH_MODE = 0x00040000; 948 949 /** @hide */ 950 @Retention(RetentionPolicy.SOURCE) 951 @IntDef({DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH, DRAWING_CACHE_QUALITY_AUTO}) 952 public @interface DrawingCacheQuality {} 953 954 /** 955 * <p>Enables low quality mode for the drawing cache.</p> 956 */ 957 public static final int DRAWING_CACHE_QUALITY_LOW = 0x00080000; 958 959 /** 960 * <p>Enables high quality mode for the drawing cache.</p> 961 */ 962 public static final int DRAWING_CACHE_QUALITY_HIGH = 0x00100000; 963 964 /** 965 * <p>Enables automatic quality mode for the drawing cache.</p> 966 */ 967 public static final int DRAWING_CACHE_QUALITY_AUTO = 0x00000000; 968 969 private static final int[] DRAWING_CACHE_QUALITY_FLAGS = { 970 DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH 971 }; 972 973 /** 974 * <p>Mask for use with setFlags indicating bits used for the cache 975 * quality property.</p> 976 * {@hide} 977 */ 978 static final int DRAWING_CACHE_QUALITY_MASK = 0x00180000; 979 980 /** 981 * <p> 982 * Indicates this view can be long clicked. When long clickable, a View 983 * reacts to long clicks by notifying the OnLongClickListener or showing a 984 * context menu. 985 * </p> 986 * {@hide} 987 */ 988 static final int LONG_CLICKABLE = 0x00200000; 989 990 /** 991 * <p>Indicates that this view gets its drawable states from its direct parent 992 * and ignores its original internal states.</p> 993 * 994 * @hide 995 */ 996 static final int DUPLICATE_PARENT_STATE = 0x00400000; 997 998 /** 999 * <p> 1000 * Indicates this view can be context clicked. When context clickable, a View reacts to a 1001 * context click (e.g. a primary stylus button press or right mouse click) by notifying the 1002 * OnContextClickListener. 1003 * </p> 1004 * {@hide} 1005 */ 1006 static final int CONTEXT_CLICKABLE = 0x00800000; 1007 1008 1009 /** @hide */ 1010 @IntDef({ 1011 SCROLLBARS_INSIDE_OVERLAY, 1012 SCROLLBARS_INSIDE_INSET, 1013 SCROLLBARS_OUTSIDE_OVERLAY, 1014 SCROLLBARS_OUTSIDE_INSET 1015 }) 1016 @Retention(RetentionPolicy.SOURCE) 1017 public @interface ScrollBarStyle {} 1018 1019 /** 1020 * The scrollbar style to display the scrollbars inside the content area, 1021 * without increasing the padding. The scrollbars will be overlaid with 1022 * translucency on the view's content. 1023 */ 1024 public static final int SCROLLBARS_INSIDE_OVERLAY = 0; 1025 1026 /** 1027 * The scrollbar style to display the scrollbars inside the padded area, 1028 * increasing the padding of the view. The scrollbars will not overlap the 1029 * content area of the view. 1030 */ 1031 public static final int SCROLLBARS_INSIDE_INSET = 0x01000000; 1032 1033 /** 1034 * The scrollbar style to display the scrollbars at the edge of the view, 1035 * without increasing the padding. The scrollbars will be overlaid with 1036 * translucency. 1037 */ 1038 public static final int SCROLLBARS_OUTSIDE_OVERLAY = 0x02000000; 1039 1040 /** 1041 * The scrollbar style to display the scrollbars at the edge of the view, 1042 * increasing the padding of the view. The scrollbars will only overlap the 1043 * background, if any. 1044 */ 1045 public static final int SCROLLBARS_OUTSIDE_INSET = 0x03000000; 1046 1047 /** 1048 * Mask to check if the scrollbar style is overlay or inset. 1049 * {@hide} 1050 */ 1051 static final int SCROLLBARS_INSET_MASK = 0x01000000; 1052 1053 /** 1054 * Mask to check if the scrollbar style is inside or outside. 1055 * {@hide} 1056 */ 1057 static final int SCROLLBARS_OUTSIDE_MASK = 0x02000000; 1058 1059 /** 1060 * Mask for scrollbar style. 1061 * {@hide} 1062 */ 1063 static final int SCROLLBARS_STYLE_MASK = 0x03000000; 1064 1065 /** 1066 * View flag indicating that the screen should remain on while the 1067 * window containing this view is visible to the user. This effectively 1068 * takes care of automatically setting the WindowManager's 1069 * {@link WindowManager.LayoutParams#FLAG_KEEP_SCREEN_ON}. 1070 */ 1071 public static final int KEEP_SCREEN_ON = 0x04000000; 1072 1073 /** 1074 * View flag indicating whether this view should have sound effects enabled 1075 * for events such as clicking and touching. 1076 */ 1077 public static final int SOUND_EFFECTS_ENABLED = 0x08000000; 1078 1079 /** 1080 * View flag indicating whether this view should have haptic feedback 1081 * enabled for events such as long presses. 1082 */ 1083 public static final int HAPTIC_FEEDBACK_ENABLED = 0x10000000; 1084 1085 /** 1086 * <p>Indicates that the view hierarchy should stop saving state when 1087 * it reaches this view. If state saving is initiated immediately at 1088 * the view, it will be allowed. 1089 * {@hide} 1090 */ 1091 static final int PARENT_SAVE_DISABLED = 0x20000000; 1092 1093 /** 1094 * <p>Mask for use with setFlags indicating bits used for PARENT_SAVE_DISABLED.</p> 1095 * {@hide} 1096 */ 1097 static final int PARENT_SAVE_DISABLED_MASK = 0x20000000; 1098 1099 /** @hide */ 1100 @IntDef(flag = true, 1101 value = { 1102 FOCUSABLES_ALL, 1103 FOCUSABLES_TOUCH_MODE 1104 }) 1105 @Retention(RetentionPolicy.SOURCE) 1106 public @interface FocusableMode {} 1107 1108 /** 1109 * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} 1110 * should add all focusable Views regardless if they are focusable in touch mode. 1111 */ 1112 public static final int FOCUSABLES_ALL = 0x00000000; 1113 1114 /** 1115 * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} 1116 * should add only Views focusable in touch mode. 1117 */ 1118 public static final int FOCUSABLES_TOUCH_MODE = 0x00000001; 1119 1120 /** @hide */ 1121 @IntDef({ 1122 FOCUS_BACKWARD, 1123 FOCUS_FORWARD, 1124 FOCUS_LEFT, 1125 FOCUS_UP, 1126 FOCUS_RIGHT, 1127 FOCUS_DOWN 1128 }) 1129 @Retention(RetentionPolicy.SOURCE) 1130 public @interface FocusDirection {} 1131 1132 /** @hide */ 1133 @IntDef({ 1134 FOCUS_LEFT, 1135 FOCUS_UP, 1136 FOCUS_RIGHT, 1137 FOCUS_DOWN 1138 }) 1139 @Retention(RetentionPolicy.SOURCE) 1140 public @interface FocusRealDirection {} // Like @FocusDirection, but without forward/backward 1141 1142 /** 1143 * Use with {@link #focusSearch(int)}. Move focus to the previous selectable 1144 * item. 1145 */ 1146 public static final int FOCUS_BACKWARD = 0x00000001; 1147 1148 /** 1149 * Use with {@link #focusSearch(int)}. Move focus to the next selectable 1150 * item. 1151 */ 1152 public static final int FOCUS_FORWARD = 0x00000002; 1153 1154 /** 1155 * Use with {@link #focusSearch(int)}. Move focus to the left. 1156 */ 1157 public static final int FOCUS_LEFT = 0x00000011; 1158 1159 /** 1160 * Use with {@link #focusSearch(int)}. Move focus up. 1161 */ 1162 public static final int FOCUS_UP = 0x00000021; 1163 1164 /** 1165 * Use with {@link #focusSearch(int)}. Move focus to the right. 1166 */ 1167 public static final int FOCUS_RIGHT = 0x00000042; 1168 1169 /** 1170 * Use with {@link #focusSearch(int)}. Move focus down. 1171 */ 1172 public static final int FOCUS_DOWN = 0x00000082; 1173 1174 /** 1175 * Bits of {@link #getMeasuredWidthAndState()} and 1176 * {@link #getMeasuredWidthAndState()} that provide the actual measured size. 1177 */ 1178 public static final int MEASURED_SIZE_MASK = 0x00ffffff; 1179 1180 /** 1181 * Bits of {@link #getMeasuredWidthAndState()} and 1182 * {@link #getMeasuredWidthAndState()} that provide the additional state bits. 1183 */ 1184 public static final int MEASURED_STATE_MASK = 0xff000000; 1185 1186 /** 1187 * Bit shift of {@link #MEASURED_STATE_MASK} to get to the height bits 1188 * for functions that combine both width and height into a single int, 1189 * such as {@link #getMeasuredState()} and the childState argument of 1190 * {@link #resolveSizeAndState(int, int, int)}. 1191 */ 1192 public static final int MEASURED_HEIGHT_STATE_SHIFT = 16; 1193 1194 /** 1195 * Bit of {@link #getMeasuredWidthAndState()} and 1196 * {@link #getMeasuredWidthAndState()} that indicates the measured size 1197 * is smaller that the space the view would like to have. 1198 */ 1199 public static final int MEASURED_STATE_TOO_SMALL = 0x01000000; 1200 1201 /** 1202 * Base View state sets 1203 */ 1204 // Singles 1205 /** 1206 * Indicates the view has no states set. States are used with 1207 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1208 * view depending on its state. 1209 * 1210 * @see android.graphics.drawable.Drawable 1211 * @see #getDrawableState() 1212 */ 1213 protected static final int[] EMPTY_STATE_SET; 1214 /** 1215 * Indicates the view is enabled. States are used with 1216 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1217 * view depending on its state. 1218 * 1219 * @see android.graphics.drawable.Drawable 1220 * @see #getDrawableState() 1221 */ 1222 protected static final int[] ENABLED_STATE_SET; 1223 /** 1224 * Indicates the view is focused. States are used with 1225 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1226 * view depending on its state. 1227 * 1228 * @see android.graphics.drawable.Drawable 1229 * @see #getDrawableState() 1230 */ 1231 protected static final int[] FOCUSED_STATE_SET; 1232 /** 1233 * Indicates the view is selected. States are used with 1234 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1235 * view depending on its state. 1236 * 1237 * @see android.graphics.drawable.Drawable 1238 * @see #getDrawableState() 1239 */ 1240 protected static final int[] SELECTED_STATE_SET; 1241 /** 1242 * Indicates the view is pressed. States are used with 1243 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1244 * view depending on its state. 1245 * 1246 * @see android.graphics.drawable.Drawable 1247 * @see #getDrawableState() 1248 */ 1249 protected static final int[] PRESSED_STATE_SET; 1250 /** 1251 * Indicates the view's window has focus. States are used with 1252 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1253 * view depending on its state. 1254 * 1255 * @see android.graphics.drawable.Drawable 1256 * @see #getDrawableState() 1257 */ 1258 protected static final int[] WINDOW_FOCUSED_STATE_SET; 1259 // Doubles 1260 /** 1261 * Indicates the view is enabled and has the focus. 1262 * 1263 * @see #ENABLED_STATE_SET 1264 * @see #FOCUSED_STATE_SET 1265 */ 1266 protected static final int[] ENABLED_FOCUSED_STATE_SET; 1267 /** 1268 * Indicates the view is enabled and selected. 1269 * 1270 * @see #ENABLED_STATE_SET 1271 * @see #SELECTED_STATE_SET 1272 */ 1273 protected static final int[] ENABLED_SELECTED_STATE_SET; 1274 /** 1275 * Indicates the view is enabled and that its window has focus. 1276 * 1277 * @see #ENABLED_STATE_SET 1278 * @see #WINDOW_FOCUSED_STATE_SET 1279 */ 1280 protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET; 1281 /** 1282 * Indicates the view is focused and selected. 1283 * 1284 * @see #FOCUSED_STATE_SET 1285 * @see #SELECTED_STATE_SET 1286 */ 1287 protected static final int[] FOCUSED_SELECTED_STATE_SET; 1288 /** 1289 * Indicates the view has the focus and that its window has the focus. 1290 * 1291 * @see #FOCUSED_STATE_SET 1292 * @see #WINDOW_FOCUSED_STATE_SET 1293 */ 1294 protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET; 1295 /** 1296 * Indicates the view is selected and that its window has the focus. 1297 * 1298 * @see #SELECTED_STATE_SET 1299 * @see #WINDOW_FOCUSED_STATE_SET 1300 */ 1301 protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET; 1302 // Triples 1303 /** 1304 * Indicates the view is enabled, focused and selected. 1305 * 1306 * @see #ENABLED_STATE_SET 1307 * @see #FOCUSED_STATE_SET 1308 * @see #SELECTED_STATE_SET 1309 */ 1310 protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET; 1311 /** 1312 * Indicates the view is enabled, focused and its window has the focus. 1313 * 1314 * @see #ENABLED_STATE_SET 1315 * @see #FOCUSED_STATE_SET 1316 * @see #WINDOW_FOCUSED_STATE_SET 1317 */ 1318 protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1319 /** 1320 * Indicates the view is enabled, selected and its window has the focus. 1321 * 1322 * @see #ENABLED_STATE_SET 1323 * @see #SELECTED_STATE_SET 1324 * @see #WINDOW_FOCUSED_STATE_SET 1325 */ 1326 protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1327 /** 1328 * Indicates the view is focused, selected and its window has the focus. 1329 * 1330 * @see #FOCUSED_STATE_SET 1331 * @see #SELECTED_STATE_SET 1332 * @see #WINDOW_FOCUSED_STATE_SET 1333 */ 1334 protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1335 /** 1336 * Indicates the view is enabled, focused, selected and its window 1337 * has the focus. 1338 * 1339 * @see #ENABLED_STATE_SET 1340 * @see #FOCUSED_STATE_SET 1341 * @see #SELECTED_STATE_SET 1342 * @see #WINDOW_FOCUSED_STATE_SET 1343 */ 1344 protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1345 /** 1346 * Indicates the view is pressed and its window has the focus. 1347 * 1348 * @see #PRESSED_STATE_SET 1349 * @see #WINDOW_FOCUSED_STATE_SET 1350 */ 1351 protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET; 1352 /** 1353 * Indicates the view is pressed and selected. 1354 * 1355 * @see #PRESSED_STATE_SET 1356 * @see #SELECTED_STATE_SET 1357 */ 1358 protected static final int[] PRESSED_SELECTED_STATE_SET; 1359 /** 1360 * Indicates the view is pressed, selected and its window has the focus. 1361 * 1362 * @see #PRESSED_STATE_SET 1363 * @see #SELECTED_STATE_SET 1364 * @see #WINDOW_FOCUSED_STATE_SET 1365 */ 1366 protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1367 /** 1368 * Indicates the view is pressed and focused. 1369 * 1370 * @see #PRESSED_STATE_SET 1371 * @see #FOCUSED_STATE_SET 1372 */ 1373 protected static final int[] PRESSED_FOCUSED_STATE_SET; 1374 /** 1375 * Indicates the view is pressed, focused and its window has the focus. 1376 * 1377 * @see #PRESSED_STATE_SET 1378 * @see #FOCUSED_STATE_SET 1379 * @see #WINDOW_FOCUSED_STATE_SET 1380 */ 1381 protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1382 /** 1383 * Indicates the view is pressed, focused and selected. 1384 * 1385 * @see #PRESSED_STATE_SET 1386 * @see #SELECTED_STATE_SET 1387 * @see #FOCUSED_STATE_SET 1388 */ 1389 protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET; 1390 /** 1391 * Indicates the view is pressed, focused, selected and its window has the focus. 1392 * 1393 * @see #PRESSED_STATE_SET 1394 * @see #FOCUSED_STATE_SET 1395 * @see #SELECTED_STATE_SET 1396 * @see #WINDOW_FOCUSED_STATE_SET 1397 */ 1398 protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1399 /** 1400 * Indicates the view is pressed and enabled. 1401 * 1402 * @see #PRESSED_STATE_SET 1403 * @see #ENABLED_STATE_SET 1404 */ 1405 protected static final int[] PRESSED_ENABLED_STATE_SET; 1406 /** 1407 * Indicates the view is pressed, enabled and its window has the focus. 1408 * 1409 * @see #PRESSED_STATE_SET 1410 * @see #ENABLED_STATE_SET 1411 * @see #WINDOW_FOCUSED_STATE_SET 1412 */ 1413 protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET; 1414 /** 1415 * Indicates the view is pressed, enabled and selected. 1416 * 1417 * @see #PRESSED_STATE_SET 1418 * @see #ENABLED_STATE_SET 1419 * @see #SELECTED_STATE_SET 1420 */ 1421 protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET; 1422 /** 1423 * Indicates the view is pressed, enabled, selected and its window has the 1424 * focus. 1425 * 1426 * @see #PRESSED_STATE_SET 1427 * @see #ENABLED_STATE_SET 1428 * @see #SELECTED_STATE_SET 1429 * @see #WINDOW_FOCUSED_STATE_SET 1430 */ 1431 protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1432 /** 1433 * Indicates the view is pressed, enabled and focused. 1434 * 1435 * @see #PRESSED_STATE_SET 1436 * @see #ENABLED_STATE_SET 1437 * @see #FOCUSED_STATE_SET 1438 */ 1439 protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET; 1440 /** 1441 * Indicates the view is pressed, enabled, focused and its window has the 1442 * focus. 1443 * 1444 * @see #PRESSED_STATE_SET 1445 * @see #ENABLED_STATE_SET 1446 * @see #FOCUSED_STATE_SET 1447 * @see #WINDOW_FOCUSED_STATE_SET 1448 */ 1449 protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1450 /** 1451 * Indicates the view is pressed, enabled, focused and selected. 1452 * 1453 * @see #PRESSED_STATE_SET 1454 * @see #ENABLED_STATE_SET 1455 * @see #SELECTED_STATE_SET 1456 * @see #FOCUSED_STATE_SET 1457 */ 1458 protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET; 1459 /** 1460 * Indicates the view is pressed, enabled, focused, selected and its window 1461 * has the focus. 1462 * 1463 * @see #PRESSED_STATE_SET 1464 * @see #ENABLED_STATE_SET 1465 * @see #SELECTED_STATE_SET 1466 * @see #FOCUSED_STATE_SET 1467 * @see #WINDOW_FOCUSED_STATE_SET 1468 */ 1469 protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1470 1471 static { 1472 EMPTY_STATE_SET = StateSet.get(0); 1473 1474 WINDOW_FOCUSED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_WINDOW_FOCUSED); 1475 1476 SELECTED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_SELECTED); 1477 SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1478 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED); 1479 1480 FOCUSED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_FOCUSED); 1481 FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1482 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED); 1483 FOCUSED_SELECTED_STATE_SET = StateSet.get( 1484 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED); 1485 FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1486 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1487 | StateSet.VIEW_STATE_FOCUSED); 1488 1489 ENABLED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_ENABLED); 1490 ENABLED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1491 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_ENABLED); 1492 ENABLED_SELECTED_STATE_SET = StateSet.get( 1493 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_ENABLED); 1494 ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1495 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1496 | StateSet.VIEW_STATE_ENABLED); 1497 ENABLED_FOCUSED_STATE_SET = StateSet.get( 1498 StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_ENABLED); 1499 ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1500 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED 1501 | StateSet.VIEW_STATE_ENABLED); 1502 ENABLED_FOCUSED_SELECTED_STATE_SET = StateSet.get( 1503 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED 1504 | StateSet.VIEW_STATE_ENABLED); 1505 ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1506 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1507 | StateSet.VIEW_STATE_FOCUSED| StateSet.VIEW_STATE_ENABLED); 1508 1509 PRESSED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_PRESSED); 1510 PRESSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1511 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_PRESSED); 1512 PRESSED_SELECTED_STATE_SET = StateSet.get( 1513 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_PRESSED); 1514 PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1515 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1516 | StateSet.VIEW_STATE_PRESSED); 1517 PRESSED_FOCUSED_STATE_SET = StateSet.get( 1518 StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_PRESSED); 1519 PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1520 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED 1521 | StateSet.VIEW_STATE_PRESSED); 1522 PRESSED_FOCUSED_SELECTED_STATE_SET = StateSet.get( 1523 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED 1524 | StateSet.VIEW_STATE_PRESSED); 1525 PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1526 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1527 | StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_PRESSED); 1528 PRESSED_ENABLED_STATE_SET = StateSet.get( 1529 StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); 1530 PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1531 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_ENABLED 1532 | StateSet.VIEW_STATE_PRESSED); 1533 PRESSED_ENABLED_SELECTED_STATE_SET = StateSet.get( 1534 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_ENABLED 1535 | StateSet.VIEW_STATE_PRESSED); 1536 PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1537 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1538 | StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); 1539 PRESSED_ENABLED_FOCUSED_STATE_SET = StateSet.get( 1540 StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_ENABLED 1541 | StateSet.VIEW_STATE_PRESSED); 1542 PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1543 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED 1544 | StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); 1545 PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET = StateSet.get( 1546 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED 1547 | StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); 1548 PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1549 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1550 | StateSet.VIEW_STATE_FOCUSED| StateSet.VIEW_STATE_ENABLED 1551 | StateSet.VIEW_STATE_PRESSED); 1552 } 1553 1554 /** 1555 * Accessibility event types that are dispatched for text population. 1556 */ 1557 private static final int POPULATING_ACCESSIBILITY_EVENT_TYPES = 1558 AccessibilityEvent.TYPE_VIEW_CLICKED 1559 | AccessibilityEvent.TYPE_VIEW_LONG_CLICKED 1560 | AccessibilityEvent.TYPE_VIEW_SELECTED 1561 | AccessibilityEvent.TYPE_VIEW_FOCUSED 1562 | AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED 1563 | AccessibilityEvent.TYPE_VIEW_HOVER_ENTER 1564 | AccessibilityEvent.TYPE_VIEW_HOVER_EXIT 1565 | AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED 1566 | AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED 1567 | AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED 1568 | AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY; 1569 1570 /** 1571 * Temporary Rect currently for use in setBackground(). This will probably 1572 * be extended in the future to hold our own class with more than just 1573 * a Rect. :) 1574 */ 1575 static final ThreadLocal<Rect> sThreadLocal = new ThreadLocal<Rect>(); 1576 1577 /** 1578 * Map used to store views' tags. 1579 */ 1580 private SparseArray<Object> mKeyedTags; 1581 1582 /** 1583 * The next available accessibility id. 1584 */ 1585 private static int sNextAccessibilityViewId; 1586 1587 /** 1588 * The animation currently associated with this view. 1589 * @hide 1590 */ 1591 protected Animation mCurrentAnimation = null; 1592 1593 /** 1594 * Width as measured during measure pass. 1595 * {@hide} 1596 */ 1597 @ViewDebug.ExportedProperty(category = "measurement") 1598 int mMeasuredWidth; 1599 1600 /** 1601 * Height as measured during measure pass. 1602 * {@hide} 1603 */ 1604 @ViewDebug.ExportedProperty(category = "measurement") 1605 int mMeasuredHeight; 1606 1607 /** 1608 * Flag to indicate that this view was marked INVALIDATED, or had its display list 1609 * invalidated, prior to the current drawing iteration. If true, the view must re-draw 1610 * its display list. This flag, used only when hw accelerated, allows us to clear the 1611 * flag while retaining this information until it's needed (at getDisplayList() time and 1612 * in drawChild(), when we decide to draw a view's children's display lists into our own). 1613 * 1614 * {@hide} 1615 */ 1616 boolean mRecreateDisplayList = false; 1617 1618 /** 1619 * The view's identifier. 1620 * {@hide} 1621 * 1622 * @see #setId(int) 1623 * @see #getId() 1624 */ 1625 @IdRes 1626 @ViewDebug.ExportedProperty(resolveId = true) 1627 int mID = NO_ID; 1628 1629 /** 1630 * The stable ID of this view for accessibility purposes. 1631 */ 1632 int mAccessibilityViewId = NO_ID; 1633 1634 private int mAccessibilityCursorPosition = ACCESSIBILITY_CURSOR_POSITION_UNDEFINED; 1635 1636 SendViewStateChangedAccessibilityEvent mSendViewStateChangedAccessibilityEvent; 1637 1638 /** 1639 * The view's tag. 1640 * {@hide} 1641 * 1642 * @see #setTag(Object) 1643 * @see #getTag() 1644 */ 1645 protected Object mTag = null; 1646 1647 // for mPrivateFlags: 1648 /** {@hide} */ 1649 static final int PFLAG_WANTS_FOCUS = 0x00000001; 1650 /** {@hide} */ 1651 static final int PFLAG_FOCUSED = 0x00000002; 1652 /** {@hide} */ 1653 static final int PFLAG_SELECTED = 0x00000004; 1654 /** {@hide} */ 1655 static final int PFLAG_IS_ROOT_NAMESPACE = 0x00000008; 1656 /** {@hide} */ 1657 static final int PFLAG_HAS_BOUNDS = 0x00000010; 1658 /** {@hide} */ 1659 static final int PFLAG_DRAWN = 0x00000020; 1660 /** 1661 * When this flag is set, this view is running an animation on behalf of its 1662 * children and should therefore not cancel invalidate requests, even if they 1663 * lie outside of this view's bounds. 1664 * 1665 * {@hide} 1666 */ 1667 static final int PFLAG_DRAW_ANIMATION = 0x00000040; 1668 /** {@hide} */ 1669 static final int PFLAG_SKIP_DRAW = 0x00000080; 1670 /** {@hide} */ 1671 static final int PFLAG_REQUEST_TRANSPARENT_REGIONS = 0x00000200; 1672 /** {@hide} */ 1673 static final int PFLAG_DRAWABLE_STATE_DIRTY = 0x00000400; 1674 /** {@hide} */ 1675 static final int PFLAG_MEASURED_DIMENSION_SET = 0x00000800; 1676 /** {@hide} */ 1677 static final int PFLAG_FORCE_LAYOUT = 0x00001000; 1678 /** {@hide} */ 1679 static final int PFLAG_LAYOUT_REQUIRED = 0x00002000; 1680 1681 private static final int PFLAG_PRESSED = 0x00004000; 1682 1683 /** {@hide} */ 1684 static final int PFLAG_DRAWING_CACHE_VALID = 0x00008000; 1685 /** 1686 * Flag used to indicate that this view should be drawn once more (and only once 1687 * more) after its animation has completed. 1688 * {@hide} 1689 */ 1690 static final int PFLAG_ANIMATION_STARTED = 0x00010000; 1691 1692 private static final int PFLAG_SAVE_STATE_CALLED = 0x00020000; 1693 1694 /** 1695 * Indicates that the View returned true when onSetAlpha() was called and that 1696 * the alpha must be restored. 1697 * {@hide} 1698 */ 1699 static final int PFLAG_ALPHA_SET = 0x00040000; 1700 1701 /** 1702 * Set by {@link #setScrollContainer(boolean)}. 1703 */ 1704 static final int PFLAG_SCROLL_CONTAINER = 0x00080000; 1705 1706 /** 1707 * Set by {@link #setScrollContainer(boolean)}. 1708 */ 1709 static final int PFLAG_SCROLL_CONTAINER_ADDED = 0x00100000; 1710 1711 /** 1712 * View flag indicating whether this view was invalidated (fully or partially.) 1713 * 1714 * @hide 1715 */ 1716 static final int PFLAG_DIRTY = 0x00200000; 1717 1718 /** 1719 * View flag indicating whether this view was invalidated by an opaque 1720 * invalidate request. 1721 * 1722 * @hide 1723 */ 1724 static final int PFLAG_DIRTY_OPAQUE = 0x00400000; 1725 1726 /** 1727 * Mask for {@link #PFLAG_DIRTY} and {@link #PFLAG_DIRTY_OPAQUE}. 1728 * 1729 * @hide 1730 */ 1731 static final int PFLAG_DIRTY_MASK = 0x00600000; 1732 1733 /** 1734 * Indicates whether the background is opaque. 1735 * 1736 * @hide 1737 */ 1738 static final int PFLAG_OPAQUE_BACKGROUND = 0x00800000; 1739 1740 /** 1741 * Indicates whether the scrollbars are opaque. 1742 * 1743 * @hide 1744 */ 1745 static final int PFLAG_OPAQUE_SCROLLBARS = 0x01000000; 1746 1747 /** 1748 * Indicates whether the view is opaque. 1749 * 1750 * @hide 1751 */ 1752 static final int PFLAG_OPAQUE_MASK = 0x01800000; 1753 1754 /** 1755 * Indicates a prepressed state; 1756 * the short time between ACTION_DOWN and recognizing 1757 * a 'real' press. Prepressed is used to recognize quick taps 1758 * even when they are shorter than ViewConfiguration.getTapTimeout(). 1759 * 1760 * @hide 1761 */ 1762 private static final int PFLAG_PREPRESSED = 0x02000000; 1763 1764 /** 1765 * Indicates whether the view is temporarily detached. 1766 * 1767 * @hide 1768 */ 1769 static final int PFLAG_CANCEL_NEXT_UP_EVENT = 0x04000000; 1770 1771 /** 1772 * Indicates that we should awaken scroll bars once attached 1773 * 1774 * PLEASE NOTE: This flag is now unused as we now send onVisibilityChanged 1775 * during window attachment and it is no longer needed. Feel free to repurpose it. 1776 * 1777 * @hide 1778 */ 1779 private static final int PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH = 0x08000000; 1780 1781 /** 1782 * Indicates that the view has received HOVER_ENTER. Cleared on HOVER_EXIT. 1783 * @hide 1784 */ 1785 private static final int PFLAG_HOVERED = 0x10000000; 1786 1787 /** 1788 * no longer needed, should be reused 1789 */ 1790 private static final int PFLAG_DOES_NOTHING_REUSE_PLEASE = 0x20000000; 1791 1792 /** {@hide} */ 1793 static final int PFLAG_ACTIVATED = 0x40000000; 1794 1795 /** 1796 * Indicates that this view was specifically invalidated, not just dirtied because some 1797 * child view was invalidated. The flag is used to determine when we need to recreate 1798 * a view's display list (as opposed to just returning a reference to its existing 1799 * display list). 1800 * 1801 * @hide 1802 */ 1803 static final int PFLAG_INVALIDATED = 0x80000000; 1804 1805 /** 1806 * Masks for mPrivateFlags2, as generated by dumpFlags(): 1807 * 1808 * |-------|-------|-------|-------| 1809 * 1 PFLAG2_DRAG_CAN_ACCEPT 1810 * 1 PFLAG2_DRAG_HOVERED 1811 * 11 PFLAG2_LAYOUT_DIRECTION_MASK 1812 * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL 1813 * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED 1814 * 11 PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK 1815 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[1] 1816 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[2] 1817 * 11 PFLAG2_TEXT_DIRECTION_FLAGS[3] 1818 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[4] 1819 * 1 1 PFLAG2_TEXT_DIRECTION_FLAGS[5] 1820 * 11 PFLAG2_TEXT_DIRECTION_FLAGS[6] 1821 * 111 PFLAG2_TEXT_DIRECTION_FLAGS[7] 1822 * 111 PFLAG2_TEXT_DIRECTION_MASK 1823 * 1 PFLAG2_TEXT_DIRECTION_RESOLVED 1824 * 1 PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT 1825 * 111 PFLAG2_TEXT_DIRECTION_RESOLVED_MASK 1826 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[1] 1827 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[2] 1828 * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[3] 1829 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[4] 1830 * 1 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[5] 1831 * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[6] 1832 * 111 PFLAG2_TEXT_ALIGNMENT_MASK 1833 * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED 1834 * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT 1835 * 111 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK 1836 * 111 PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK 1837 * 11 PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK 1838 * 1 PFLAG2_ACCESSIBILITY_FOCUSED 1839 * 1 PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED 1840 * 1 PFLAG2_VIEW_QUICK_REJECTED 1841 * 1 PFLAG2_PADDING_RESOLVED 1842 * 1 PFLAG2_DRAWABLE_RESOLVED 1843 * 1 PFLAG2_HAS_TRANSIENT_STATE 1844 * |-------|-------|-------|-------| 1845 */ 1846 1847 /** 1848 * Indicates that this view has reported that it can accept the current drag's content. 1849 * Cleared when the drag operation concludes. 1850 * @hide 1851 */ 1852 static final int PFLAG2_DRAG_CAN_ACCEPT = 0x00000001; 1853 1854 /** 1855 * Indicates that this view is currently directly under the drag location in a 1856 * drag-and-drop operation involving content that it can accept. Cleared when 1857 * the drag exits the view, or when the drag operation concludes. 1858 * @hide 1859 */ 1860 static final int PFLAG2_DRAG_HOVERED = 0x00000002; 1861 1862 /** @hide */ 1863 @IntDef({ 1864 LAYOUT_DIRECTION_LTR, 1865 LAYOUT_DIRECTION_RTL, 1866 LAYOUT_DIRECTION_INHERIT, 1867 LAYOUT_DIRECTION_LOCALE 1868 }) 1869 @Retention(RetentionPolicy.SOURCE) 1870 // Not called LayoutDirection to avoid conflict with android.util.LayoutDirection 1871 public @interface LayoutDir {} 1872 1873 /** @hide */ 1874 @IntDef({ 1875 LAYOUT_DIRECTION_LTR, 1876 LAYOUT_DIRECTION_RTL 1877 }) 1878 @Retention(RetentionPolicy.SOURCE) 1879 public @interface ResolvedLayoutDir {} 1880 1881 /** 1882 * A flag to indicate that the layout direction of this view has not been defined yet. 1883 * @hide 1884 */ 1885 public static final int LAYOUT_DIRECTION_UNDEFINED = LayoutDirection.UNDEFINED; 1886 1887 /** 1888 * Horizontal layout direction of this view is from Left to Right. 1889 * Use with {@link #setLayoutDirection}. 1890 */ 1891 public static final int LAYOUT_DIRECTION_LTR = LayoutDirection.LTR; 1892 1893 /** 1894 * Horizontal layout direction of this view is from Right to Left. 1895 * Use with {@link #setLayoutDirection}. 1896 */ 1897 public static final int LAYOUT_DIRECTION_RTL = LayoutDirection.RTL; 1898 1899 /** 1900 * Horizontal layout direction of this view is inherited from its parent. 1901 * Use with {@link #setLayoutDirection}. 1902 */ 1903 public static final int LAYOUT_DIRECTION_INHERIT = LayoutDirection.INHERIT; 1904 1905 /** 1906 * Horizontal layout direction of this view is from deduced from the default language 1907 * script for the locale. Use with {@link #setLayoutDirection}. 1908 */ 1909 public static final int LAYOUT_DIRECTION_LOCALE = LayoutDirection.LOCALE; 1910 1911 /** 1912 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 1913 * @hide 1914 */ 1915 static final int PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT = 2; 1916 1917 /** 1918 * Mask for use with private flags indicating bits used for horizontal layout direction. 1919 * @hide 1920 */ 1921 static final int PFLAG2_LAYOUT_DIRECTION_MASK = 0x00000003 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1922 1923 /** 1924 * Indicates whether the view horizontal layout direction has been resolved and drawn to the 1925 * right-to-left direction. 1926 * @hide 1927 */ 1928 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL = 4 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1929 1930 /** 1931 * Indicates whether the view horizontal layout direction has been resolved. 1932 * @hide 1933 */ 1934 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED = 8 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1935 1936 /** 1937 * Mask for use with private flags indicating bits used for resolved horizontal layout direction. 1938 * @hide 1939 */ 1940 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK = 0x0000000C 1941 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 1942 1943 /* 1944 * Array of horizontal layout direction flags for mapping attribute "layoutDirection" to correct 1945 * flag value. 1946 * @hide 1947 */ 1948 private static final int[] LAYOUT_DIRECTION_FLAGS = { 1949 LAYOUT_DIRECTION_LTR, 1950 LAYOUT_DIRECTION_RTL, 1951 LAYOUT_DIRECTION_INHERIT, 1952 LAYOUT_DIRECTION_LOCALE 1953 }; 1954 1955 /** 1956 * Default horizontal layout direction. 1957 */ 1958 private static final int LAYOUT_DIRECTION_DEFAULT = LAYOUT_DIRECTION_INHERIT; 1959 1960 /** 1961 * Default horizontal layout direction. 1962 * @hide 1963 */ 1964 static final int LAYOUT_DIRECTION_RESOLVED_DEFAULT = LAYOUT_DIRECTION_LTR; 1965 1966 /** 1967 * Text direction is inherited through {@link ViewGroup} 1968 */ 1969 public static final int TEXT_DIRECTION_INHERIT = 0; 1970 1971 /** 1972 * Text direction is using "first strong algorithm". The first strong directional character 1973 * determines the paragraph direction. If there is no strong directional character, the 1974 * paragraph direction is the view's resolved layout direction. 1975 */ 1976 public static final int TEXT_DIRECTION_FIRST_STRONG = 1; 1977 1978 /** 1979 * Text direction is using "any-RTL" algorithm. The paragraph direction is RTL if it contains 1980 * any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. 1981 * If there are neither, the paragraph direction is the view's resolved layout direction. 1982 */ 1983 public static final int TEXT_DIRECTION_ANY_RTL = 2; 1984 1985 /** 1986 * Text direction is forced to LTR. 1987 */ 1988 public static final int TEXT_DIRECTION_LTR = 3; 1989 1990 /** 1991 * Text direction is forced to RTL. 1992 */ 1993 public static final int TEXT_DIRECTION_RTL = 4; 1994 1995 /** 1996 * Text direction is coming from the system Locale. 1997 */ 1998 public static final int TEXT_DIRECTION_LOCALE = 5; 1999 2000 /** 2001 * Text direction is using "first strong algorithm". The first strong directional character 2002 * determines the paragraph direction. If there is no strong directional character, the 2003 * paragraph direction is LTR. 2004 */ 2005 public static final int TEXT_DIRECTION_FIRST_STRONG_LTR = 6; 2006 2007 /** 2008 * Text direction is using "first strong algorithm". The first strong directional character 2009 * determines the paragraph direction. If there is no strong directional character, the 2010 * paragraph direction is RTL. 2011 */ 2012 public static final int TEXT_DIRECTION_FIRST_STRONG_RTL = 7; 2013 2014 /** 2015 * Default text direction is inherited 2016 */ 2017 private static final int TEXT_DIRECTION_DEFAULT = TEXT_DIRECTION_INHERIT; 2018 2019 /** 2020 * Default resolved text direction 2021 * @hide 2022 */ 2023 static final int TEXT_DIRECTION_RESOLVED_DEFAULT = TEXT_DIRECTION_FIRST_STRONG; 2024 2025 /** 2026 * Bit shift to get the horizontal layout direction. (bits after LAYOUT_DIRECTION_RESOLVED) 2027 * @hide 2028 */ 2029 static final int PFLAG2_TEXT_DIRECTION_MASK_SHIFT = 6; 2030 2031 /** 2032 * Mask for use with private flags indicating bits used for text direction. 2033 * @hide 2034 */ 2035 static final int PFLAG2_TEXT_DIRECTION_MASK = 0x00000007 2036 << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 2037 2038 /** 2039 * Array of text direction flags for mapping attribute "textDirection" to correct 2040 * flag value. 2041 * @hide 2042 */ 2043 private static final int[] PFLAG2_TEXT_DIRECTION_FLAGS = { 2044 TEXT_DIRECTION_INHERIT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2045 TEXT_DIRECTION_FIRST_STRONG << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2046 TEXT_DIRECTION_ANY_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2047 TEXT_DIRECTION_LTR << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2048 TEXT_DIRECTION_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2049 TEXT_DIRECTION_LOCALE << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2050 TEXT_DIRECTION_FIRST_STRONG_LTR << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2051 TEXT_DIRECTION_FIRST_STRONG_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT 2052 }; 2053 2054 /** 2055 * Indicates whether the view text direction has been resolved. 2056 * @hide 2057 */ 2058 static final int PFLAG2_TEXT_DIRECTION_RESOLVED = 0x00000008 2059 << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 2060 2061 /** 2062 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 2063 * @hide 2064 */ 2065 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT = 10; 2066 2067 /** 2068 * Mask for use with private flags indicating bits used for resolved text direction. 2069 * @hide 2070 */ 2071 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK = 0x00000007 2072 << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 2073 2074 /** 2075 * Indicates whether the view text direction has been resolved to the "first strong" heuristic. 2076 * @hide 2077 */ 2078 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT = 2079 TEXT_DIRECTION_RESOLVED_DEFAULT << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 2080 2081 /** @hide */ 2082 @IntDef({ 2083 TEXT_ALIGNMENT_INHERIT, 2084 TEXT_ALIGNMENT_GRAVITY, 2085 TEXT_ALIGNMENT_CENTER, 2086 TEXT_ALIGNMENT_TEXT_START, 2087 TEXT_ALIGNMENT_TEXT_END, 2088 TEXT_ALIGNMENT_VIEW_START, 2089 TEXT_ALIGNMENT_VIEW_END 2090 }) 2091 @Retention(RetentionPolicy.SOURCE) 2092 public @interface TextAlignment {} 2093 2094 /** 2095 * Default text alignment. The text alignment of this View is inherited from its parent. 2096 * Use with {@link #setTextAlignment(int)} 2097 */ 2098 public static final int TEXT_ALIGNMENT_INHERIT = 0; 2099 2100 /** 2101 * Default for the root view. The gravity determines the text alignment, ALIGN_NORMAL, 2102 * ALIGN_CENTER, or ALIGN_OPPOSITE, which are relative to each paragraphs text direction. 2103 * 2104 * Use with {@link #setTextAlignment(int)} 2105 */ 2106 public static final int TEXT_ALIGNMENT_GRAVITY = 1; 2107 2108 /** 2109 * Align to the start of the paragraph, e.g. ALIGN_NORMAL. 2110 * 2111 * Use with {@link #setTextAlignment(int)} 2112 */ 2113 public static final int TEXT_ALIGNMENT_TEXT_START = 2; 2114 2115 /** 2116 * Align to the end of the paragraph, e.g. ALIGN_OPPOSITE. 2117 * 2118 * Use with {@link #setTextAlignment(int)} 2119 */ 2120 public static final int TEXT_ALIGNMENT_TEXT_END = 3; 2121 2122 /** 2123 * Center the paragraph, e.g. ALIGN_CENTER. 2124 * 2125 * Use with {@link #setTextAlignment(int)} 2126 */ 2127 public static final int TEXT_ALIGNMENT_CENTER = 4; 2128 2129 /** 2130 * Align to the start of the view, which is ALIGN_LEFT if the views resolved 2131 * layoutDirection is LTR, and ALIGN_RIGHT otherwise. 2132 * 2133 * Use with {@link #setTextAlignment(int)} 2134 */ 2135 public static final int TEXT_ALIGNMENT_VIEW_START = 5; 2136 2137 /** 2138 * Align to the end of the view, which is ALIGN_RIGHT if the views resolved 2139 * layoutDirection is LTR, and ALIGN_LEFT otherwise. 2140 * 2141 * Use with {@link #setTextAlignment(int)} 2142 */ 2143 public static final int TEXT_ALIGNMENT_VIEW_END = 6; 2144 2145 /** 2146 * Default text alignment is inherited 2147 */ 2148 private static final int TEXT_ALIGNMENT_DEFAULT = TEXT_ALIGNMENT_GRAVITY; 2149 2150 /** 2151 * Default resolved text alignment 2152 * @hide 2153 */ 2154 static final int TEXT_ALIGNMENT_RESOLVED_DEFAULT = TEXT_ALIGNMENT_GRAVITY; 2155 2156 /** 2157 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 2158 * @hide 2159 */ 2160 static final int PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT = 13; 2161 2162 /** 2163 * Mask for use with private flags indicating bits used for text alignment. 2164 * @hide 2165 */ 2166 static final int PFLAG2_TEXT_ALIGNMENT_MASK = 0x00000007 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 2167 2168 /** 2169 * Array of text direction flags for mapping attribute "textAlignment" to correct 2170 * flag value. 2171 * @hide 2172 */ 2173 private static final int[] PFLAG2_TEXT_ALIGNMENT_FLAGS = { 2174 TEXT_ALIGNMENT_INHERIT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2175 TEXT_ALIGNMENT_GRAVITY << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2176 TEXT_ALIGNMENT_TEXT_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2177 TEXT_ALIGNMENT_TEXT_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2178 TEXT_ALIGNMENT_CENTER << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2179 TEXT_ALIGNMENT_VIEW_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2180 TEXT_ALIGNMENT_VIEW_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT 2181 }; 2182 2183 /** 2184 * Indicates whether the view text alignment has been resolved. 2185 * @hide 2186 */ 2187 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED = 0x00000008 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 2188 2189 /** 2190 * Bit shift to get the resolved text alignment. 2191 * @hide 2192 */ 2193 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT = 17; 2194 2195 /** 2196 * Mask for use with private flags indicating bits used for text alignment. 2197 * @hide 2198 */ 2199 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK = 0x00000007 2200 << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 2201 2202 /** 2203 * Indicates whether if the view text alignment has been resolved to gravity 2204 */ 2205 private static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT = 2206 TEXT_ALIGNMENT_RESOLVED_DEFAULT << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 2207 2208 // Accessiblity constants for mPrivateFlags2 2209 2210 /** 2211 * Shift for the bits in {@link #mPrivateFlags2} related to the 2212 * "importantForAccessibility" attribute. 2213 */ 2214 static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT = 20; 2215 2216 /** 2217 * Automatically determine whether a view is important for accessibility. 2218 */ 2219 public static final int IMPORTANT_FOR_ACCESSIBILITY_AUTO = 0x00000000; 2220 2221 /** 2222 * The view is important for accessibility. 2223 */ 2224 public static final int IMPORTANT_FOR_ACCESSIBILITY_YES = 0x00000001; 2225 2226 /** 2227 * The view is not important for accessibility. 2228 */ 2229 public static final int IMPORTANT_FOR_ACCESSIBILITY_NO = 0x00000002; 2230 2231 /** 2232 * The view is not important for accessibility, nor are any of its 2233 * descendant views. 2234 */ 2235 public static final int IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS = 0x00000004; 2236 2237 /** 2238 * The default whether the view is important for accessibility. 2239 */ 2240 static final int IMPORTANT_FOR_ACCESSIBILITY_DEFAULT = IMPORTANT_FOR_ACCESSIBILITY_AUTO; 2241 2242 /** 2243 * Mask for obtainig the bits which specify how to determine 2244 * whether a view is important for accessibility. 2245 */ 2246 static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK = (IMPORTANT_FOR_ACCESSIBILITY_AUTO 2247 | IMPORTANT_FOR_ACCESSIBILITY_YES | IMPORTANT_FOR_ACCESSIBILITY_NO 2248 | IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) 2249 << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 2250 2251 /** 2252 * Shift for the bits in {@link #mPrivateFlags2} related to the 2253 * "accessibilityLiveRegion" attribute. 2254 */ 2255 static final int PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT = 23; 2256 2257 /** 2258 * Live region mode specifying that accessibility services should not 2259 * automatically announce changes to this view. This is the default live 2260 * region mode for most views. 2261 * <p> 2262 * Use with {@link #setAccessibilityLiveRegion(int)}. 2263 */ 2264 public static final int ACCESSIBILITY_LIVE_REGION_NONE = 0x00000000; 2265 2266 /** 2267 * Live region mode specifying that accessibility services should announce 2268 * changes to this view. 2269 * <p> 2270 * Use with {@link #setAccessibilityLiveRegion(int)}. 2271 */ 2272 public static final int ACCESSIBILITY_LIVE_REGION_POLITE = 0x00000001; 2273 2274 /** 2275 * Live region mode specifying that accessibility services should interrupt 2276 * ongoing speech to immediately announce changes to this view. 2277 * <p> 2278 * Use with {@link #setAccessibilityLiveRegion(int)}. 2279 */ 2280 public static final int ACCESSIBILITY_LIVE_REGION_ASSERTIVE = 0x00000002; 2281 2282 /** 2283 * The default whether the view is important for accessibility. 2284 */ 2285 static final int ACCESSIBILITY_LIVE_REGION_DEFAULT = ACCESSIBILITY_LIVE_REGION_NONE; 2286 2287 /** 2288 * Mask for obtaining the bits which specify a view's accessibility live 2289 * region mode. 2290 */ 2291 static final int PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK = (ACCESSIBILITY_LIVE_REGION_NONE 2292 | ACCESSIBILITY_LIVE_REGION_POLITE | ACCESSIBILITY_LIVE_REGION_ASSERTIVE) 2293 << PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT; 2294 2295 /** 2296 * Flag indicating whether a view has accessibility focus. 2297 */ 2298 static final int PFLAG2_ACCESSIBILITY_FOCUSED = 0x04000000; 2299 2300 /** 2301 * Flag whether the accessibility state of the subtree rooted at this view changed. 2302 */ 2303 static final int PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED = 0x08000000; 2304 2305 /** 2306 * Flag indicating whether a view failed the quickReject() check in draw(). This condition 2307 * is used to check whether later changes to the view's transform should invalidate the 2308 * view to force the quickReject test to run again. 2309 */ 2310 static final int PFLAG2_VIEW_QUICK_REJECTED = 0x10000000; 2311 2312 /** 2313 * Flag indicating that start/end padding has been resolved into left/right padding 2314 * for use in measurement, layout, drawing, etc. This is set by {@link #resolvePadding()} 2315 * and checked by {@link #measure(int, int)} to determine if padding needs to be resolved 2316 * during measurement. In some special cases this is required such as when an adapter-based 2317 * view measures prospective children without attaching them to a window. 2318 */ 2319 static final int PFLAG2_PADDING_RESOLVED = 0x20000000; 2320 2321 /** 2322 * Flag indicating that the start/end drawables has been resolved into left/right ones. 2323 */ 2324 static final int PFLAG2_DRAWABLE_RESOLVED = 0x40000000; 2325 2326 /** 2327 * Indicates that the view is tracking some sort of transient state 2328 * that the app should not need to be aware of, but that the framework 2329 * should take special care to preserve. 2330 */ 2331 static final int PFLAG2_HAS_TRANSIENT_STATE = 0x80000000; 2332 2333 /** 2334 * Group of bits indicating that RTL properties resolution is done. 2335 */ 2336 static final int ALL_RTL_PROPERTIES_RESOLVED = PFLAG2_LAYOUT_DIRECTION_RESOLVED | 2337 PFLAG2_TEXT_DIRECTION_RESOLVED | 2338 PFLAG2_TEXT_ALIGNMENT_RESOLVED | 2339 PFLAG2_PADDING_RESOLVED | 2340 PFLAG2_DRAWABLE_RESOLVED; 2341 2342 // There are a couple of flags left in mPrivateFlags2 2343 2344 /* End of masks for mPrivateFlags2 */ 2345 2346 /** 2347 * Masks for mPrivateFlags3, as generated by dumpFlags(): 2348 * 2349 * |-------|-------|-------|-------| 2350 * 1 PFLAG3_VIEW_IS_ANIMATING_TRANSFORM 2351 * 1 PFLAG3_VIEW_IS_ANIMATING_ALPHA 2352 * 1 PFLAG3_IS_LAID_OUT 2353 * 1 PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT 2354 * 1 PFLAG3_CALLED_SUPER 2355 * 1 PFLAG3_APPLYING_INSETS 2356 * 1 PFLAG3_FITTING_SYSTEM_WINDOWS 2357 * 1 PFLAG3_NESTED_SCROLLING_ENABLED 2358 * 1 PFLAG3_ASSIST_BLOCKED 2359 * |-------|-------|-------|-------| 2360 */ 2361 2362 /** 2363 * Flag indicating that view has a transform animation set on it. This is used to track whether 2364 * an animation is cleared between successive frames, in order to tell the associated 2365 * DisplayList to clear its animation matrix. 2366 */ 2367 static final int PFLAG3_VIEW_IS_ANIMATING_TRANSFORM = 0x1; 2368 2369 /** 2370 * Flag indicating that view has an alpha animation set on it. This is used to track whether an 2371 * animation is cleared between successive frames, in order to tell the associated 2372 * DisplayList to restore its alpha value. 2373 */ 2374 static final int PFLAG3_VIEW_IS_ANIMATING_ALPHA = 0x2; 2375 2376 /** 2377 * Flag indicating that the view has been through at least one layout since it 2378 * was last attached to a window. 2379 */ 2380 static final int PFLAG3_IS_LAID_OUT = 0x4; 2381 2382 /** 2383 * Flag indicating that a call to measure() was skipped and should be done 2384 * instead when layout() is invoked. 2385 */ 2386 static final int PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT = 0x8; 2387 2388 /** 2389 * Flag indicating that an overridden method correctly called down to 2390 * the superclass implementation as required by the API spec. 2391 */ 2392 static final int PFLAG3_CALLED_SUPER = 0x10; 2393 2394 /** 2395 * Flag indicating that we're in the process of applying window insets. 2396 */ 2397 static final int PFLAG3_APPLYING_INSETS = 0x20; 2398 2399 /** 2400 * Flag indicating that we're in the process of fitting system windows using the old method. 2401 */ 2402 static final int PFLAG3_FITTING_SYSTEM_WINDOWS = 0x40; 2403 2404 /** 2405 * Flag indicating that nested scrolling is enabled for this view. 2406 * The view will optionally cooperate with views up its parent chain to allow for 2407 * integrated nested scrolling along the same axis. 2408 */ 2409 static final int PFLAG3_NESTED_SCROLLING_ENABLED = 0x80; 2410 2411 /** 2412 * Flag indicating that the bottom scroll indicator should be displayed 2413 * when this view can scroll up. 2414 */ 2415 static final int PFLAG3_SCROLL_INDICATOR_TOP = 0x0100; 2416 2417 /** 2418 * Flag indicating that the bottom scroll indicator should be displayed 2419 * when this view can scroll down. 2420 */ 2421 static final int PFLAG3_SCROLL_INDICATOR_BOTTOM = 0x0200; 2422 2423 /** 2424 * Flag indicating that the left scroll indicator should be displayed 2425 * when this view can scroll left. 2426 */ 2427 static final int PFLAG3_SCROLL_INDICATOR_LEFT = 0x0400; 2428 2429 /** 2430 * Flag indicating that the right scroll indicator should be displayed 2431 * when this view can scroll right. 2432 */ 2433 static final int PFLAG3_SCROLL_INDICATOR_RIGHT = 0x0800; 2434 2435 /** 2436 * Flag indicating that the start scroll indicator should be displayed 2437 * when this view can scroll in the start direction. 2438 */ 2439 static final int PFLAG3_SCROLL_INDICATOR_START = 0x1000; 2440 2441 /** 2442 * Flag indicating that the end scroll indicator should be displayed 2443 * when this view can scroll in the end direction. 2444 */ 2445 static final int PFLAG3_SCROLL_INDICATOR_END = 0x2000; 2446 2447 /* End of masks for mPrivateFlags3 */ 2448 2449 static final int DRAG_MASK = PFLAG2_DRAG_CAN_ACCEPT | PFLAG2_DRAG_HOVERED; 2450 2451 static final int SCROLL_INDICATORS_NONE = 0x0000; 2452 2453 /** 2454 * Mask for use with setFlags indicating bits used for indicating which 2455 * scroll indicators are enabled. 2456 */ 2457 static final int SCROLL_INDICATORS_PFLAG3_MASK = PFLAG3_SCROLL_INDICATOR_TOP 2458 | PFLAG3_SCROLL_INDICATOR_BOTTOM | PFLAG3_SCROLL_INDICATOR_LEFT 2459 | PFLAG3_SCROLL_INDICATOR_RIGHT | PFLAG3_SCROLL_INDICATOR_START 2460 | PFLAG3_SCROLL_INDICATOR_END; 2461 2462 /** 2463 * Left-shift required to translate between public scroll indicator flags 2464 * and internal PFLAGS3 flags. When used as a right-shift, translates 2465 * PFLAGS3 flags to public flags. 2466 */ 2467 static final int SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT = 8; 2468 2469 /** @hide */ 2470 @Retention(RetentionPolicy.SOURCE) 2471 @IntDef(flag = true, 2472 value = { 2473 SCROLL_INDICATOR_TOP, 2474 SCROLL_INDICATOR_BOTTOM, 2475 SCROLL_INDICATOR_LEFT, 2476 SCROLL_INDICATOR_RIGHT, 2477 SCROLL_INDICATOR_START, 2478 SCROLL_INDICATOR_END, 2479 }) 2480 public @interface ScrollIndicators {} 2481 2482 /** 2483 * Scroll indicator direction for the top edge of the view. 2484 * 2485 * @see #setScrollIndicators(int) 2486 * @see #setScrollIndicators(int, int) 2487 * @see #getScrollIndicators() 2488 */ 2489 public static final int SCROLL_INDICATOR_TOP = 2490 PFLAG3_SCROLL_INDICATOR_TOP >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2491 2492 /** 2493 * Scroll indicator direction for the bottom edge of the view. 2494 * 2495 * @see #setScrollIndicators(int) 2496 * @see #setScrollIndicators(int, int) 2497 * @see #getScrollIndicators() 2498 */ 2499 public static final int SCROLL_INDICATOR_BOTTOM = 2500 PFLAG3_SCROLL_INDICATOR_BOTTOM >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2501 2502 /** 2503 * Scroll indicator direction for the left edge of the view. 2504 * 2505 * @see #setScrollIndicators(int) 2506 * @see #setScrollIndicators(int, int) 2507 * @see #getScrollIndicators() 2508 */ 2509 public static final int SCROLL_INDICATOR_LEFT = 2510 PFLAG3_SCROLL_INDICATOR_LEFT >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2511 2512 /** 2513 * Scroll indicator direction for the right edge of the view. 2514 * 2515 * @see #setScrollIndicators(int) 2516 * @see #setScrollIndicators(int, int) 2517 * @see #getScrollIndicators() 2518 */ 2519 public static final int SCROLL_INDICATOR_RIGHT = 2520 PFLAG3_SCROLL_INDICATOR_RIGHT >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2521 2522 /** 2523 * Scroll indicator direction for the starting edge of the view. 2524 * <p> 2525 * Resolved according to the view's layout direction, see 2526 * {@link #getLayoutDirection()} for more information. 2527 * 2528 * @see #setScrollIndicators(int) 2529 * @see #setScrollIndicators(int, int) 2530 * @see #getScrollIndicators() 2531 */ 2532 public static final int SCROLL_INDICATOR_START = 2533 PFLAG3_SCROLL_INDICATOR_START >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2534 2535 /** 2536 * Scroll indicator direction for the ending edge of the view. 2537 * <p> 2538 * Resolved according to the view's layout direction, see 2539 * {@link #getLayoutDirection()} for more information. 2540 * 2541 * @see #setScrollIndicators(int) 2542 * @see #setScrollIndicators(int, int) 2543 * @see #getScrollIndicators() 2544 */ 2545 public static final int SCROLL_INDICATOR_END = 2546 PFLAG3_SCROLL_INDICATOR_END >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2547 2548 /** 2549 * <p>Indicates that we are allowing {@link ViewStructure} to traverse 2550 * into this view.<p> 2551 */ 2552 static final int PFLAG3_ASSIST_BLOCKED = 0x100; 2553 2554 /** 2555 * Always allow a user to over-scroll this view, provided it is a 2556 * view that can scroll. 2557 * 2558 * @see #getOverScrollMode() 2559 * @see #setOverScrollMode(int) 2560 */ 2561 public static final int OVER_SCROLL_ALWAYS = 0; 2562 2563 /** 2564 * Allow a user to over-scroll this view only if the content is large 2565 * enough to meaningfully scroll, provided it is a view that can scroll. 2566 * 2567 * @see #getOverScrollMode() 2568 * @see #setOverScrollMode(int) 2569 */ 2570 public static final int OVER_SCROLL_IF_CONTENT_SCROLLS = 1; 2571 2572 /** 2573 * Never allow a user to over-scroll this view. 2574 * 2575 * @see #getOverScrollMode() 2576 * @see #setOverScrollMode(int) 2577 */ 2578 public static final int OVER_SCROLL_NEVER = 2; 2579 2580 /** 2581 * Special constant for {@link #setSystemUiVisibility(int)}: View has 2582 * requested the system UI (status bar) to be visible (the default). 2583 * 2584 * @see #setSystemUiVisibility(int) 2585 */ 2586 public static final int SYSTEM_UI_FLAG_VISIBLE = 0; 2587 2588 /** 2589 * Flag for {@link #setSystemUiVisibility(int)}: View has requested the 2590 * system UI to enter an unobtrusive "low profile" mode. 2591 * 2592 * <p>This is for use in games, book readers, video players, or any other 2593 * "immersive" application where the usual system chrome is deemed too distracting. 2594 * 2595 * <p>In low profile mode, the status bar and/or navigation icons may dim. 2596 * 2597 * @see #setSystemUiVisibility(int) 2598 */ 2599 public static final int SYSTEM_UI_FLAG_LOW_PROFILE = 0x00000001; 2600 2601 /** 2602 * Flag for {@link #setSystemUiVisibility(int)}: View has requested that the 2603 * system navigation be temporarily hidden. 2604 * 2605 * <p>This is an even less obtrusive state than that called for by 2606 * {@link #SYSTEM_UI_FLAG_LOW_PROFILE}; on devices that draw essential navigation controls 2607 * (Home, Back, and the like) on screen, <code>SYSTEM_UI_FLAG_HIDE_NAVIGATION</code> will cause 2608 * those to disappear. This is useful (in conjunction with the 2609 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN FLAG_FULLSCREEN} and 2610 * {@link android.view.WindowManager.LayoutParams#FLAG_LAYOUT_IN_SCREEN FLAG_LAYOUT_IN_SCREEN} 2611 * window flags) for displaying content using every last pixel on the display. 2612 * 2613 * <p>There is a limitation: because navigation controls are so important, the least user 2614 * interaction will cause them to reappear immediately. When this happens, both 2615 * this flag and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be cleared automatically, 2616 * so that both elements reappear at the same time. 2617 * 2618 * @see #setSystemUiVisibility(int) 2619 */ 2620 public static final int SYSTEM_UI_FLAG_HIDE_NAVIGATION = 0x00000002; 2621 2622 /** 2623 * Flag for {@link #setSystemUiVisibility(int)}: View has requested to go 2624 * into the normal fullscreen mode so that its content can take over the screen 2625 * while still allowing the user to interact with the application. 2626 * 2627 * <p>This has the same visual effect as 2628 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN 2629 * WindowManager.LayoutParams.FLAG_FULLSCREEN}, 2630 * meaning that non-critical screen decorations (such as the status bar) will be 2631 * hidden while the user is in the View's window, focusing the experience on 2632 * that content. Unlike the window flag, if you are using ActionBar in 2633 * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY 2634 * Window.FEATURE_ACTION_BAR_OVERLAY}, then enabling this flag will also 2635 * hide the action bar. 2636 * 2637 * <p>This approach to going fullscreen is best used over the window flag when 2638 * it is a transient state -- that is, the application does this at certain 2639 * points in its user interaction where it wants to allow the user to focus 2640 * on content, but not as a continuous state. For situations where the application 2641 * would like to simply stay full screen the entire time (such as a game that 2642 * wants to take over the screen), the 2643 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN window flag} 2644 * is usually a better approach. The state set here will be removed by the system 2645 * in various situations (such as the user moving to another application) like 2646 * the other system UI states. 2647 * 2648 * <p>When using this flag, the application should provide some easy facility 2649 * for the user to go out of it. A common example would be in an e-book 2650 * reader, where tapping on the screen brings back whatever screen and UI 2651 * decorations that had been hidden while the user was immersed in reading 2652 * the book. 2653 * 2654 * @see #setSystemUiVisibility(int) 2655 */ 2656 public static final int SYSTEM_UI_FLAG_FULLSCREEN = 0x00000004; 2657 2658 /** 2659 * Flag for {@link #setSystemUiVisibility(int)}: When using other layout 2660 * flags, we would like a stable view of the content insets given to 2661 * {@link #fitSystemWindows(Rect)}. This means that the insets seen there 2662 * will always represent the worst case that the application can expect 2663 * as a continuous state. In the stock Android UI this is the space for 2664 * the system bar, nav bar, and status bar, but not more transient elements 2665 * such as an input method. 2666 * 2667 * The stable layout your UI sees is based on the system UI modes you can 2668 * switch to. That is, if you specify {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} 2669 * then you will get a stable layout for changes of the 2670 * {@link #SYSTEM_UI_FLAG_FULLSCREEN} mode; if you specify 2671 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} and 2672 * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, then you can transition 2673 * to {@link #SYSTEM_UI_FLAG_FULLSCREEN} and {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} 2674 * with a stable layout. (Note that you should avoid using 2675 * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} by itself.) 2676 * 2677 * If you have set the window flag {@link WindowManager.LayoutParams#FLAG_FULLSCREEN} 2678 * to hide the status bar (instead of using {@link #SYSTEM_UI_FLAG_FULLSCREEN}), 2679 * then a hidden status bar will be considered a "stable" state for purposes 2680 * here. This allows your UI to continually hide the status bar, while still 2681 * using the system UI flags to hide the action bar while still retaining 2682 * a stable layout. Note that changing the window fullscreen flag will never 2683 * provide a stable layout for a clean transition. 2684 * 2685 * <p>If you are using ActionBar in 2686 * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY 2687 * Window.FEATURE_ACTION_BAR_OVERLAY}, this flag will also impact the 2688 * insets it adds to those given to the application. 2689 */ 2690 public static final int SYSTEM_UI_FLAG_LAYOUT_STABLE = 0x00000100; 2691 2692 /** 2693 * Flag for {@link #setSystemUiVisibility(int)}: View would like its window 2694 * to be laid out as if it has requested 2695 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, even if it currently hasn't. This 2696 * allows it to avoid artifacts when switching in and out of that mode, at 2697 * the expense that some of its user interface may be covered by screen 2698 * decorations when they are shown. You can perform layout of your inner 2699 * UI elements to account for the navigation system UI through the 2700 * {@link #fitSystemWindows(Rect)} method. 2701 */ 2702 public static final int SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION = 0x00000200; 2703 2704 /** 2705 * Flag for {@link #setSystemUiVisibility(int)}: View would like its window 2706 * to be laid out as if it has requested 2707 * {@link #SYSTEM_UI_FLAG_FULLSCREEN}, even if it currently hasn't. This 2708 * allows it to avoid artifacts when switching in and out of that mode, at 2709 * the expense that some of its user interface may be covered by screen 2710 * decorations when they are shown. You can perform layout of your inner 2711 * UI elements to account for non-fullscreen system UI through the 2712 * {@link #fitSystemWindows(Rect)} method. 2713 */ 2714 public static final int SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN = 0x00000400; 2715 2716 /** 2717 * Flag for {@link #setSystemUiVisibility(int)}: View would like to remain interactive when 2718 * hiding the navigation bar with {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. If this flag is 2719 * not set, {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} will be force cleared by the system on any 2720 * user interaction. 2721 * <p>Since this flag is a modifier for {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, it only 2722 * has an effect when used in combination with that flag.</p> 2723 */ 2724 public static final int SYSTEM_UI_FLAG_IMMERSIVE = 0x00000800; 2725 2726 /** 2727 * Flag for {@link #setSystemUiVisibility(int)}: View would like to remain interactive when 2728 * hiding the status bar with {@link #SYSTEM_UI_FLAG_FULLSCREEN} and/or hiding the navigation 2729 * bar with {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. Use this flag to create an immersive 2730 * experience while also hiding the system bars. If this flag is not set, 2731 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} will be force cleared by the system on any user 2732 * interaction, and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be force-cleared by the system 2733 * if the user swipes from the top of the screen. 2734 * <p>When system bars are hidden in immersive mode, they can be revealed temporarily with 2735 * system gestures, such as swiping from the top of the screen. These transient system bars 2736 * will overlay apps content, may have some degree of transparency, and will automatically 2737 * hide after a short timeout. 2738 * </p><p>Since this flag is a modifier for {@link #SYSTEM_UI_FLAG_FULLSCREEN} and 2739 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, it only has an effect when used in combination 2740 * with one or both of those flags.</p> 2741 */ 2742 public static final int SYSTEM_UI_FLAG_IMMERSIVE_STICKY = 0x00001000; 2743 2744 /** 2745 * Flag for {@link #setSystemUiVisibility(int)}: Requests the status bar to draw in a mode that 2746 * is compatible with light status bar backgrounds. 2747 * 2748 * <p>For this to take effect, the window must request 2749 * {@link android.view.WindowManager.LayoutParams#FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS 2750 * FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS} but not 2751 * {@link android.view.WindowManager.LayoutParams#FLAG_TRANSLUCENT_STATUS 2752 * FLAG_TRANSLUCENT_STATUS}. 2753 * 2754 * @see android.R.attr#windowLightStatusBar 2755 */ 2756 public static final int SYSTEM_UI_FLAG_LIGHT_STATUS_BAR = 0x00002000; 2757 2758 /** 2759 * @deprecated Use {@link #SYSTEM_UI_FLAG_LOW_PROFILE} instead. 2760 */ 2761 public static final int STATUS_BAR_HIDDEN = SYSTEM_UI_FLAG_LOW_PROFILE; 2762 2763 /** 2764 * @deprecated Use {@link #SYSTEM_UI_FLAG_VISIBLE} instead. 2765 */ 2766 public static final int STATUS_BAR_VISIBLE = SYSTEM_UI_FLAG_VISIBLE; 2767 2768 /** 2769 * @hide 2770 * 2771 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2772 * out of the public fields to keep the undefined bits out of the developer's way. 2773 * 2774 * Flag to make the status bar not expandable. Unless you also 2775 * set {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS}, new notifications will continue to show. 2776 */ 2777 public static final int STATUS_BAR_DISABLE_EXPAND = 0x00010000; 2778 2779 /** 2780 * @hide 2781 * 2782 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2783 * out of the public fields to keep the undefined bits out of the developer's way. 2784 * 2785 * Flag to hide notification icons and scrolling ticker text. 2786 */ 2787 public static final int STATUS_BAR_DISABLE_NOTIFICATION_ICONS = 0x00020000; 2788 2789 /** 2790 * @hide 2791 * 2792 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2793 * out of the public fields to keep the undefined bits out of the developer's way. 2794 * 2795 * Flag to disable incoming notification alerts. This will not block 2796 * icons, but it will block sound, vibrating and other visual or aural notifications. 2797 */ 2798 public static final int STATUS_BAR_DISABLE_NOTIFICATION_ALERTS = 0x00040000; 2799 2800 /** 2801 * @hide 2802 * 2803 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2804 * out of the public fields to keep the undefined bits out of the developer's way. 2805 * 2806 * Flag to hide only the scrolling ticker. Note that 2807 * {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS} implies 2808 * {@link #STATUS_BAR_DISABLE_NOTIFICATION_TICKER}. 2809 */ 2810 public static final int STATUS_BAR_DISABLE_NOTIFICATION_TICKER = 0x00080000; 2811 2812 /** 2813 * @hide 2814 * 2815 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2816 * out of the public fields to keep the undefined bits out of the developer's way. 2817 * 2818 * Flag to hide the center system info area. 2819 */ 2820 public static final int STATUS_BAR_DISABLE_SYSTEM_INFO = 0x00100000; 2821 2822 /** 2823 * @hide 2824 * 2825 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2826 * out of the public fields to keep the undefined bits out of the developer's way. 2827 * 2828 * Flag to hide only the home button. Don't use this 2829 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2830 */ 2831 public static final int STATUS_BAR_DISABLE_HOME = 0x00200000; 2832 2833 /** 2834 * @hide 2835 * 2836 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2837 * out of the public fields to keep the undefined bits out of the developer's way. 2838 * 2839 * Flag to hide only the back button. Don't use this 2840 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2841 */ 2842 public static final int STATUS_BAR_DISABLE_BACK = 0x00400000; 2843 2844 /** 2845 * @hide 2846 * 2847 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2848 * out of the public fields to keep the undefined bits out of the developer's way. 2849 * 2850 * Flag to hide only the clock. You might use this if your activity has 2851 * its own clock making the status bar's clock redundant. 2852 */ 2853 public static final int STATUS_BAR_DISABLE_CLOCK = 0x00800000; 2854 2855 /** 2856 * @hide 2857 * 2858 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2859 * out of the public fields to keep the undefined bits out of the developer's way. 2860 * 2861 * Flag to hide only the recent apps button. Don't use this 2862 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2863 */ 2864 public static final int STATUS_BAR_DISABLE_RECENT = 0x01000000; 2865 2866 /** 2867 * @hide 2868 * 2869 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2870 * out of the public fields to keep the undefined bits out of the developer's way. 2871 * 2872 * Flag to disable the global search gesture. Don't use this 2873 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2874 */ 2875 public static final int STATUS_BAR_DISABLE_SEARCH = 0x02000000; 2876 2877 /** 2878 * @hide 2879 * 2880 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2881 * out of the public fields to keep the undefined bits out of the developer's way. 2882 * 2883 * Flag to specify that the status bar is displayed in transient mode. 2884 */ 2885 public static final int STATUS_BAR_TRANSIENT = 0x04000000; 2886 2887 /** 2888 * @hide 2889 * 2890 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2891 * out of the public fields to keep the undefined bits out of the developer's way. 2892 * 2893 * Flag to specify that the navigation bar is displayed in transient mode. 2894 */ 2895 public static final int NAVIGATION_BAR_TRANSIENT = 0x08000000; 2896 2897 /** 2898 * @hide 2899 * 2900 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2901 * out of the public fields to keep the undefined bits out of the developer's way. 2902 * 2903 * Flag to specify that the hidden status bar would like to be shown. 2904 */ 2905 public static final int STATUS_BAR_UNHIDE = 0x10000000; 2906 2907 /** 2908 * @hide 2909 * 2910 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2911 * out of the public fields to keep the undefined bits out of the developer's way. 2912 * 2913 * Flag to specify that the hidden navigation bar would like to be shown. 2914 */ 2915 public static final int NAVIGATION_BAR_UNHIDE = 0x20000000; 2916 2917 /** 2918 * @hide 2919 * 2920 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2921 * out of the public fields to keep the undefined bits out of the developer's way. 2922 * 2923 * Flag to specify that the status bar is displayed in translucent mode. 2924 */ 2925 public static final int STATUS_BAR_TRANSLUCENT = 0x40000000; 2926 2927 /** 2928 * @hide 2929 * 2930 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2931 * out of the public fields to keep the undefined bits out of the developer's way. 2932 * 2933 * Flag to specify that the navigation bar is displayed in translucent mode. 2934 */ 2935 public static final int NAVIGATION_BAR_TRANSLUCENT = 0x80000000; 2936 2937 /** 2938 * @hide 2939 * 2940 * Whether Recents is visible or not. 2941 */ 2942 public static final int RECENT_APPS_VISIBLE = 0x00004000; 2943 2944 /** 2945 * @hide 2946 * 2947 * Makes system ui transparent. 2948 */ 2949 public static final int SYSTEM_UI_TRANSPARENT = 0x00008000; 2950 2951 /** 2952 * @hide 2953 */ 2954 public static final int PUBLIC_STATUS_BAR_VISIBILITY_MASK = 0x00003FFF; 2955 2956 /** 2957 * These are the system UI flags that can be cleared by events outside 2958 * of an application. Currently this is just the ability to tap on the 2959 * screen while hiding the navigation bar to have it return. 2960 * @hide 2961 */ 2962 public static final int SYSTEM_UI_CLEARABLE_FLAGS = 2963 SYSTEM_UI_FLAG_LOW_PROFILE | SYSTEM_UI_FLAG_HIDE_NAVIGATION 2964 | SYSTEM_UI_FLAG_FULLSCREEN; 2965 2966 /** 2967 * Flags that can impact the layout in relation to system UI. 2968 */ 2969 public static final int SYSTEM_UI_LAYOUT_FLAGS = 2970 SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION 2971 | SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN; 2972 2973 /** @hide */ 2974 @IntDef(flag = true, 2975 value = { FIND_VIEWS_WITH_TEXT, FIND_VIEWS_WITH_CONTENT_DESCRIPTION }) 2976 @Retention(RetentionPolicy.SOURCE) 2977 public @interface FindViewFlags {} 2978 2979 /** 2980 * Find views that render the specified text. 2981 * 2982 * @see #findViewsWithText(ArrayList, CharSequence, int) 2983 */ 2984 public static final int FIND_VIEWS_WITH_TEXT = 0x00000001; 2985 2986 /** 2987 * Find find views that contain the specified content description. 2988 * 2989 * @see #findViewsWithText(ArrayList, CharSequence, int) 2990 */ 2991 public static final int FIND_VIEWS_WITH_CONTENT_DESCRIPTION = 0x00000002; 2992 2993 /** 2994 * Find views that contain {@link AccessibilityNodeProvider}. Such 2995 * a View is a root of virtual view hierarchy and may contain the searched 2996 * text. If this flag is set Views with providers are automatically 2997 * added and it is a responsibility of the client to call the APIs of 2998 * the provider to determine whether the virtual tree rooted at this View 2999 * contains the text, i.e. getting the list of {@link AccessibilityNodeInfo}s 3000 * representing the virtual views with this text. 3001 * 3002 * @see #findViewsWithText(ArrayList, CharSequence, int) 3003 * 3004 * @hide 3005 */ 3006 public static final int FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS = 0x00000004; 3007 3008 /** 3009 * The undefined cursor position. 3010 * 3011 * @hide 3012 */ 3013 public static final int ACCESSIBILITY_CURSOR_POSITION_UNDEFINED = -1; 3014 3015 /** 3016 * Indicates that the screen has changed state and is now off. 3017 * 3018 * @see #onScreenStateChanged(int) 3019 */ 3020 public static final int SCREEN_STATE_OFF = 0x0; 3021 3022 /** 3023 * Indicates that the screen has changed state and is now on. 3024 * 3025 * @see #onScreenStateChanged(int) 3026 */ 3027 public static final int SCREEN_STATE_ON = 0x1; 3028 3029 /** 3030 * Indicates no axis of view scrolling. 3031 */ 3032 public static final int SCROLL_AXIS_NONE = 0; 3033 3034 /** 3035 * Indicates scrolling along the horizontal axis. 3036 */ 3037 public static final int SCROLL_AXIS_HORIZONTAL = 1 << 0; 3038 3039 /** 3040 * Indicates scrolling along the vertical axis. 3041 */ 3042 public static final int SCROLL_AXIS_VERTICAL = 1 << 1; 3043 3044 /** 3045 * Controls the over-scroll mode for this view. 3046 * See {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)}, 3047 * {@link #OVER_SCROLL_ALWAYS}, {@link #OVER_SCROLL_IF_CONTENT_SCROLLS}, 3048 * and {@link #OVER_SCROLL_NEVER}. 3049 */ 3050 private int mOverScrollMode; 3051 3052 /** 3053 * The parent this view is attached to. 3054 * {@hide} 3055 * 3056 * @see #getParent() 3057 */ 3058 protected ViewParent mParent; 3059 3060 /** 3061 * {@hide} 3062 */ 3063 AttachInfo mAttachInfo; 3064 3065 /** 3066 * {@hide} 3067 */ 3068 @ViewDebug.ExportedProperty(flagMapping = { 3069 @ViewDebug.FlagToString(mask = PFLAG_FORCE_LAYOUT, equals = PFLAG_FORCE_LAYOUT, 3070 name = "FORCE_LAYOUT"), 3071 @ViewDebug.FlagToString(mask = PFLAG_LAYOUT_REQUIRED, equals = PFLAG_LAYOUT_REQUIRED, 3072 name = "LAYOUT_REQUIRED"), 3073 @ViewDebug.FlagToString(mask = PFLAG_DRAWING_CACHE_VALID, equals = PFLAG_DRAWING_CACHE_VALID, 3074 name = "DRAWING_CACHE_INVALID", outputIf = false), 3075 @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "DRAWN", outputIf = true), 3076 @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "NOT_DRAWN", outputIf = false), 3077 @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY_OPAQUE, name = "DIRTY_OPAQUE"), 3078 @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY, name = "DIRTY") 3079 }, formatToHexString = true) 3080 int mPrivateFlags; 3081 int mPrivateFlags2; 3082 int mPrivateFlags3; 3083 3084 /** 3085 * This view's request for the visibility of the status bar. 3086 * @hide 3087 */ 3088 @ViewDebug.ExportedProperty(flagMapping = { 3089 @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_LOW_PROFILE, 3090 equals = SYSTEM_UI_FLAG_LOW_PROFILE, 3091 name = "SYSTEM_UI_FLAG_LOW_PROFILE", outputIf = true), 3092 @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_HIDE_NAVIGATION, 3093 equals = SYSTEM_UI_FLAG_HIDE_NAVIGATION, 3094 name = "SYSTEM_UI_FLAG_HIDE_NAVIGATION", outputIf = true), 3095 @ViewDebug.FlagToString(mask = PUBLIC_STATUS_BAR_VISIBILITY_MASK, 3096 equals = SYSTEM_UI_FLAG_VISIBLE, 3097 name = "SYSTEM_UI_FLAG_VISIBLE", outputIf = true) 3098 }, formatToHexString = true) 3099 int mSystemUiVisibility; 3100 3101 /** 3102 * Reference count for transient state. 3103 * @see #setHasTransientState(boolean) 3104 */ 3105 int mTransientStateCount = 0; 3106 3107 /** 3108 * Count of how many windows this view has been attached to. 3109 */ 3110 int mWindowAttachCount; 3111 3112 /** 3113 * The layout parameters associated with this view and used by the parent 3114 * {@link android.view.ViewGroup} to determine how this view should be 3115 * laid out. 3116 * {@hide} 3117 */ 3118 protected ViewGroup.LayoutParams mLayoutParams; 3119 3120 /** 3121 * The view flags hold various views states. 3122 * {@hide} 3123 */ 3124 @ViewDebug.ExportedProperty(formatToHexString = true) 3125 int mViewFlags; 3126 3127 static class TransformationInfo { 3128 /** 3129 * The transform matrix for the View. This transform is calculated internally 3130 * based on the translation, rotation, and scale properties. 3131 * 3132 * Do *not* use this variable directly; instead call getMatrix(), which will 3133 * load the value from the View's RenderNode. 3134 */ 3135 private final Matrix mMatrix = new Matrix(); 3136 3137 /** 3138 * The inverse transform matrix for the View. This transform is calculated 3139 * internally based on the translation, rotation, and scale properties. 3140 * 3141 * Do *not* use this variable directly; instead call getInverseMatrix(), 3142 * which will load the value from the View's RenderNode. 3143 */ 3144 private Matrix mInverseMatrix; 3145 3146 /** 3147 * The opacity of the View. This is a value from 0 to 1, where 0 means 3148 * completely transparent and 1 means completely opaque. 3149 */ 3150 @ViewDebug.ExportedProperty 3151 float mAlpha = 1f; 3152 3153 /** 3154 * The opacity of the view as manipulated by the Fade transition. This is a hidden 3155 * property only used by transitions, which is composited with the other alpha 3156 * values to calculate the final visual alpha value. 3157 */ 3158 float mTransitionAlpha = 1f; 3159 } 3160 3161 TransformationInfo mTransformationInfo; 3162 3163 /** 3164 * Current clip bounds. to which all drawing of this view are constrained. 3165 */ 3166 Rect mClipBounds = null; 3167 3168 private boolean mLastIsOpaque; 3169 3170 /** 3171 * The distance in pixels from the left edge of this view's parent 3172 * to the left edge of this view. 3173 * {@hide} 3174 */ 3175 @ViewDebug.ExportedProperty(category = "layout") 3176 protected int mLeft; 3177 /** 3178 * The distance in pixels from the left edge of this view's parent 3179 * to the right edge of this view. 3180 * {@hide} 3181 */ 3182 @ViewDebug.ExportedProperty(category = "layout") 3183 protected int mRight; 3184 /** 3185 * The distance in pixels from the top edge of this view's parent 3186 * to the top edge of this view. 3187 * {@hide} 3188 */ 3189 @ViewDebug.ExportedProperty(category = "layout") 3190 protected int mTop; 3191 /** 3192 * The distance in pixels from the top edge of this view's parent 3193 * to the bottom edge of this view. 3194 * {@hide} 3195 */ 3196 @ViewDebug.ExportedProperty(category = "layout") 3197 protected int mBottom; 3198 3199 /** 3200 * The offset, in pixels, by which the content of this view is scrolled 3201 * horizontally. 3202 * {@hide} 3203 */ 3204 @ViewDebug.ExportedProperty(category = "scrolling") 3205 protected int mScrollX; 3206 /** 3207 * The offset, in pixels, by which the content of this view is scrolled 3208 * vertically. 3209 * {@hide} 3210 */ 3211 @ViewDebug.ExportedProperty(category = "scrolling") 3212 protected int mScrollY; 3213 3214 /** 3215 * The left padding in pixels, that is the distance in pixels between the 3216 * left edge of this view and the left edge of its content. 3217 * {@hide} 3218 */ 3219 @ViewDebug.ExportedProperty(category = "padding") 3220 protected int mPaddingLeft = 0; 3221 /** 3222 * The right padding in pixels, that is the distance in pixels between the 3223 * right edge of this view and the right edge of its content. 3224 * {@hide} 3225 */ 3226 @ViewDebug.ExportedProperty(category = "padding") 3227 protected int mPaddingRight = 0; 3228 /** 3229 * The top padding in pixels, that is the distance in pixels between the 3230 * top edge of this view and the top edge of its content. 3231 * {@hide} 3232 */ 3233 @ViewDebug.ExportedProperty(category = "padding") 3234 protected int mPaddingTop; 3235 /** 3236 * The bottom padding in pixels, that is the distance in pixels between the 3237 * bottom edge of this view and the bottom edge of its content. 3238 * {@hide} 3239 */ 3240 @ViewDebug.ExportedProperty(category = "padding") 3241 protected int mPaddingBottom; 3242 3243 /** 3244 * The layout insets in pixels, that is the distance in pixels between the 3245 * visible edges of this view its bounds. 3246 */ 3247 private Insets mLayoutInsets; 3248 3249 /** 3250 * Briefly describes the view and is primarily used for accessibility support. 3251 */ 3252 private CharSequence mContentDescription; 3253 3254 /** 3255 * Specifies the id of a view for which this view serves as a label for 3256 * accessibility purposes. 3257 */ 3258 private int mLabelForId = View.NO_ID; 3259 3260 /** 3261 * Predicate for matching labeled view id with its label for 3262 * accessibility purposes. 3263 */ 3264 private MatchLabelForPredicate mMatchLabelForPredicate; 3265 3266 /** 3267 * Specifies a view before which this one is visited in accessibility traversal. 3268 */ 3269 private int mAccessibilityTraversalBeforeId = NO_ID; 3270 3271 /** 3272 * Specifies a view after which this one is visited in accessibility traversal. 3273 */ 3274 private int mAccessibilityTraversalAfterId = NO_ID; 3275 3276 /** 3277 * Predicate for matching a view by its id. 3278 */ 3279 private MatchIdPredicate mMatchIdPredicate; 3280 3281 /** 3282 * Cache the paddingRight set by the user to append to the scrollbar's size. 3283 * 3284 * @hide 3285 */ 3286 @ViewDebug.ExportedProperty(category = "padding") 3287 protected int mUserPaddingRight; 3288 3289 /** 3290 * Cache the paddingBottom set by the user to append to the scrollbar's size. 3291 * 3292 * @hide 3293 */ 3294 @ViewDebug.ExportedProperty(category = "padding") 3295 protected int mUserPaddingBottom; 3296 3297 /** 3298 * Cache the paddingLeft set by the user to append to the scrollbar's size. 3299 * 3300 * @hide 3301 */ 3302 @ViewDebug.ExportedProperty(category = "padding") 3303 protected int mUserPaddingLeft; 3304 3305 /** 3306 * Cache the paddingStart set by the user to append to the scrollbar's size. 3307 * 3308 */ 3309 @ViewDebug.ExportedProperty(category = "padding") 3310 int mUserPaddingStart; 3311 3312 /** 3313 * Cache the paddingEnd set by the user to append to the scrollbar's size. 3314 * 3315 */ 3316 @ViewDebug.ExportedProperty(category = "padding") 3317 int mUserPaddingEnd; 3318 3319 /** 3320 * Cache initial left padding. 3321 * 3322 * @hide 3323 */ 3324 int mUserPaddingLeftInitial; 3325 3326 /** 3327 * Cache initial right padding. 3328 * 3329 * @hide 3330 */ 3331 int mUserPaddingRightInitial; 3332 3333 /** 3334 * Default undefined padding 3335 */ 3336 private static final int UNDEFINED_PADDING = Integer.MIN_VALUE; 3337 3338 /** 3339 * Cache if a left padding has been defined 3340 */ 3341 private boolean mLeftPaddingDefined = false; 3342 3343 /** 3344 * Cache if a right padding has been defined 3345 */ 3346 private boolean mRightPaddingDefined = false; 3347 3348 /** 3349 * @hide 3350 */ 3351 int mOldWidthMeasureSpec = Integer.MIN_VALUE; 3352 /** 3353 * @hide 3354 */ 3355 int mOldHeightMeasureSpec = Integer.MIN_VALUE; 3356 3357 private LongSparseLongArray mMeasureCache; 3358 3359 @ViewDebug.ExportedProperty(deepExport = true, prefix = "bg_") 3360 private Drawable mBackground; 3361 private TintInfo mBackgroundTint; 3362 3363 @ViewDebug.ExportedProperty(deepExport = true, prefix = "fg_") 3364 private ForegroundInfo mForegroundInfo; 3365 3366 private Drawable mScrollIndicatorDrawable; 3367 3368 /** 3369 * RenderNode used for backgrounds. 3370 * <p> 3371 * When non-null and valid, this is expected to contain an up-to-date copy 3372 * of the background drawable. It is cleared on temporary detach, and reset 3373 * on cleanup. 3374 */ 3375 private RenderNode mBackgroundRenderNode; 3376 3377 private int mBackgroundResource; 3378 private boolean mBackgroundSizeChanged; 3379 3380 private String mTransitionName; 3381 3382 static class TintInfo { 3383 ColorStateList mTintList; 3384 PorterDuff.Mode mTintMode; 3385 boolean mHasTintMode; 3386 boolean mHasTintList; 3387 } 3388 3389 private static class ForegroundInfo { 3390 private Drawable mDrawable; 3391 private TintInfo mTintInfo; 3392 private int mGravity = Gravity.FILL; 3393 private boolean mInsidePadding = true; 3394 private boolean mBoundsChanged = true; 3395 private final Rect mSelfBounds = new Rect(); 3396 private final Rect mOverlayBounds = new Rect(); 3397 } 3398 3399 static class ListenerInfo { 3400 /** 3401 * Listener used to dispatch focus change events. 3402 * This field should be made private, so it is hidden from the SDK. 3403 * {@hide} 3404 */ 3405 protected OnFocusChangeListener mOnFocusChangeListener; 3406 3407 /** 3408 * Listeners for layout change events. 3409 */ 3410 private ArrayList<OnLayoutChangeListener> mOnLayoutChangeListeners; 3411 3412 protected OnScrollChangeListener mOnScrollChangeListener; 3413 3414 /** 3415 * Listeners for attach events. 3416 */ 3417 private CopyOnWriteArrayList<OnAttachStateChangeListener> mOnAttachStateChangeListeners; 3418 3419 /** 3420 * Listener used to dispatch click events. 3421 * This field should be made private, so it is hidden from the SDK. 3422 * {@hide} 3423 */ 3424 public OnClickListener mOnClickListener; 3425 3426 /** 3427 * Listener used to dispatch long click events. 3428 * This field should be made private, so it is hidden from the SDK. 3429 * {@hide} 3430 */ 3431 protected OnLongClickListener mOnLongClickListener; 3432 3433 /** 3434 * Listener used to dispatch context click events. This field should be made private, so it 3435 * is hidden from the SDK. 3436 * {@hide} 3437 */ 3438 protected OnContextClickListener mOnContextClickListener; 3439 3440 /** 3441 * Listener used to build the context menu. 3442 * This field should be made private, so it is hidden from the SDK. 3443 * {@hide} 3444 */ 3445 protected OnCreateContextMenuListener mOnCreateContextMenuListener; 3446 3447 private OnKeyListener mOnKeyListener; 3448 3449 private OnTouchListener mOnTouchListener; 3450 3451 private OnHoverListener mOnHoverListener; 3452 3453 private OnGenericMotionListener mOnGenericMotionListener; 3454 3455 private OnDragListener mOnDragListener; 3456 3457 private OnSystemUiVisibilityChangeListener mOnSystemUiVisibilityChangeListener; 3458 3459 OnApplyWindowInsetsListener mOnApplyWindowInsetsListener; 3460 } 3461 3462 ListenerInfo mListenerInfo; 3463 3464 /** 3465 * The application environment this view lives in. 3466 * This field should be made private, so it is hidden from the SDK. 3467 * {@hide} 3468 */ 3469 @ViewDebug.ExportedProperty(deepExport = true) 3470 protected Context mContext; 3471 3472 private final Resources mResources; 3473 3474 private ScrollabilityCache mScrollCache; 3475 3476 private int[] mDrawableState = null; 3477 3478 ViewOutlineProvider mOutlineProvider = ViewOutlineProvider.BACKGROUND; 3479 3480 /** 3481 * Animator that automatically runs based on state changes. 3482 */ 3483 private StateListAnimator mStateListAnimator; 3484 3485 /** 3486 * When this view has focus and the next focus is {@link #FOCUS_LEFT}, 3487 * the user may specify which view to go to next. 3488 */ 3489 private int mNextFocusLeftId = View.NO_ID; 3490 3491 /** 3492 * When this view has focus and the next focus is {@link #FOCUS_RIGHT}, 3493 * the user may specify which view to go to next. 3494 */ 3495 private int mNextFocusRightId = View.NO_ID; 3496 3497 /** 3498 * When this view has focus and the next focus is {@link #FOCUS_UP}, 3499 * the user may specify which view to go to next. 3500 */ 3501 private int mNextFocusUpId = View.NO_ID; 3502 3503 /** 3504 * When this view has focus and the next focus is {@link #FOCUS_DOWN}, 3505 * the user may specify which view to go to next. 3506 */ 3507 private int mNextFocusDownId = View.NO_ID; 3508 3509 /** 3510 * When this view has focus and the next focus is {@link #FOCUS_FORWARD}, 3511 * the user may specify which view to go to next. 3512 */ 3513 int mNextFocusForwardId = View.NO_ID; 3514 3515 private CheckForLongPress mPendingCheckForLongPress; 3516 private CheckForTap mPendingCheckForTap = null; 3517 private PerformClick mPerformClick; 3518 private SendViewScrolledAccessibilityEvent mSendViewScrolledAccessibilityEvent; 3519 3520 private UnsetPressedState mUnsetPressedState; 3521 3522 /** 3523 * Whether the long press's action has been invoked. The tap's action is invoked on the 3524 * up event while a long press is invoked as soon as the long press duration is reached, so 3525 * a long press could be performed before the tap is checked, in which case the tap's action 3526 * should not be invoked. 3527 */ 3528 private boolean mHasPerformedLongPress; 3529 3530 /** 3531 * Whether a context click button is currently pressed down. This is true when the stylus is 3532 * touching the screen and the primary button has been pressed, or if a mouse's right button is 3533 * pressed. This is false once the button is released or if the stylus has been lifted. 3534 */ 3535 private boolean mInContextButtonPress; 3536 3537 /** 3538 * Whether the next up event should be ignored for the purposes of gesture recognition. This is 3539 * true after a stylus button press has occured, when the next up event should not be recognized 3540 * as a tap. 3541 */ 3542 private boolean mIgnoreNextUpEvent; 3543 3544 /** 3545 * The minimum height of the view. We'll try our best to have the height 3546 * of this view to at least this amount. 3547 */ 3548 @ViewDebug.ExportedProperty(category = "measurement") 3549 private int mMinHeight; 3550 3551 /** 3552 * The minimum width of the view. We'll try our best to have the width 3553 * of this view to at least this amount. 3554 */ 3555 @ViewDebug.ExportedProperty(category = "measurement") 3556 private int mMinWidth; 3557 3558 /** 3559 * The delegate to handle touch events that are physically in this view 3560 * but should be handled by another view. 3561 */ 3562 private TouchDelegate mTouchDelegate = null; 3563 3564 /** 3565 * Solid color to use as a background when creating the drawing cache. Enables 3566 * the cache to use 16 bit bitmaps instead of 32 bit. 3567 */ 3568 private int mDrawingCacheBackgroundColor = 0; 3569 3570 /** 3571 * Special tree observer used when mAttachInfo is null. 3572 */ 3573 private ViewTreeObserver mFloatingTreeObserver; 3574 3575 /** 3576 * Cache the touch slop from the context that created the view. 3577 */ 3578 private int mTouchSlop; 3579 3580 /** 3581 * Object that handles automatic animation of view properties. 3582 */ 3583 private ViewPropertyAnimator mAnimator = null; 3584 3585 /** 3586 * Flag indicating that a drag can cross window boundaries. When 3587 * {@link #startDrag(ClipData, DragShadowBuilder, Object, int)} is called 3588 * with this flag set, all visible applications will be able to participate 3589 * in the drag operation and receive the dragged content. 3590 * 3591 * @hide 3592 */ 3593 public static final int DRAG_FLAG_GLOBAL = 1; 3594 3595 /** 3596 * Vertical scroll factor cached by {@link #getVerticalScrollFactor}. 3597 */ 3598 private float mVerticalScrollFactor; 3599 3600 /** 3601 * Position of the vertical scroll bar. 3602 */ 3603 private int mVerticalScrollbarPosition; 3604 3605 /** 3606 * Position the scroll bar at the default position as determined by the system. 3607 */ 3608 public static final int SCROLLBAR_POSITION_DEFAULT = 0; 3609 3610 /** 3611 * Position the scroll bar along the left edge. 3612 */ 3613 public static final int SCROLLBAR_POSITION_LEFT = 1; 3614 3615 /** 3616 * Position the scroll bar along the right edge. 3617 */ 3618 public static final int SCROLLBAR_POSITION_RIGHT = 2; 3619 3620 /** 3621 * Indicates that the view does not have a layer. 3622 * 3623 * @see #getLayerType() 3624 * @see #setLayerType(int, android.graphics.Paint) 3625 * @see #LAYER_TYPE_SOFTWARE 3626 * @see #LAYER_TYPE_HARDWARE 3627 */ 3628 public static final int LAYER_TYPE_NONE = 0; 3629 3630 /** 3631 * <p>Indicates that the view has a software layer. A software layer is backed 3632 * by a bitmap and causes the view to be rendered using Android's software 3633 * rendering pipeline, even if hardware acceleration is enabled.</p> 3634 * 3635 * <p>Software layers have various usages:</p> 3636 * <p>When the application is not using hardware acceleration, a software layer 3637 * is useful to apply a specific color filter and/or blending mode and/or 3638 * translucency to a view and all its children.</p> 3639 * <p>When the application is using hardware acceleration, a software layer 3640 * is useful to render drawing primitives not supported by the hardware 3641 * accelerated pipeline. It can also be used to cache a complex view tree 3642 * into a texture and reduce the complexity of drawing operations. For instance, 3643 * when animating a complex view tree with a translation, a software layer can 3644 * be used to render the view tree only once.</p> 3645 * <p>Software layers should be avoided when the affected view tree updates 3646 * often. Every update will require to re-render the software layer, which can 3647 * potentially be slow (particularly when hardware acceleration is turned on 3648 * since the layer will have to be uploaded into a hardware texture after every 3649 * update.)</p> 3650 * 3651 * @see #getLayerType() 3652 * @see #setLayerType(int, android.graphics.Paint) 3653 * @see #LAYER_TYPE_NONE 3654 * @see #LAYER_TYPE_HARDWARE 3655 */ 3656 public static final int LAYER_TYPE_SOFTWARE = 1; 3657 3658 /** 3659 * <p>Indicates that the view has a hardware layer. A hardware layer is backed 3660 * by a hardware specific texture (generally Frame Buffer Objects or FBO on 3661 * OpenGL hardware) and causes the view to be rendered using Android's hardware 3662 * rendering pipeline, but only if hardware acceleration is turned on for the 3663 * view hierarchy. When hardware acceleration is turned off, hardware layers 3664 * behave exactly as {@link #LAYER_TYPE_SOFTWARE software layers}.</p> 3665 * 3666 * <p>A hardware layer is useful to apply a specific color filter and/or 3667 * blending mode and/or translucency to a view and all its children.</p> 3668 * <p>A hardware layer can be used to cache a complex view tree into a 3669 * texture and reduce the complexity of drawing operations. For instance, 3670 * when animating a complex view tree with a translation, a hardware layer can 3671 * be used to render the view tree only once.</p> 3672 * <p>A hardware layer can also be used to increase the rendering quality when 3673 * rotation transformations are applied on a view. It can also be used to 3674 * prevent potential clipping issues when applying 3D transforms on a view.</p> 3675 * 3676 * @see #getLayerType() 3677 * @see #setLayerType(int, android.graphics.Paint) 3678 * @see #LAYER_TYPE_NONE 3679 * @see #LAYER_TYPE_SOFTWARE 3680 */ 3681 public static final int LAYER_TYPE_HARDWARE = 2; 3682 3683 @ViewDebug.ExportedProperty(category = "drawing", mapping = { 3684 @ViewDebug.IntToString(from = LAYER_TYPE_NONE, to = "NONE"), 3685 @ViewDebug.IntToString(from = LAYER_TYPE_SOFTWARE, to = "SOFTWARE"), 3686 @ViewDebug.IntToString(from = LAYER_TYPE_HARDWARE, to = "HARDWARE") 3687 }) 3688 int mLayerType = LAYER_TYPE_NONE; 3689 Paint mLayerPaint; 3690 3691 /** 3692 * Set to true when drawing cache is enabled and cannot be created. 3693 * 3694 * @hide 3695 */ 3696 public boolean mCachingFailed; 3697 private Bitmap mDrawingCache; 3698 private Bitmap mUnscaledDrawingCache; 3699 3700 /** 3701 * RenderNode holding View properties, potentially holding a DisplayList of View content. 3702 * <p> 3703 * When non-null and valid, this is expected to contain an up-to-date copy 3704 * of the View content. Its DisplayList content is cleared on temporary detach and reset on 3705 * cleanup. 3706 */ 3707 final RenderNode mRenderNode; 3708 3709 /** 3710 * Set to true when the view is sending hover accessibility events because it 3711 * is the innermost hovered view. 3712 */ 3713 private boolean mSendingHoverAccessibilityEvents; 3714 3715 /** 3716 * Delegate for injecting accessibility functionality. 3717 */ 3718 AccessibilityDelegate mAccessibilityDelegate; 3719 3720 /** 3721 * The view's overlay layer. Developers get a reference to the overlay via getOverlay() 3722 * and add/remove objects to/from the overlay directly through the Overlay methods. 3723 */ 3724 ViewOverlay mOverlay; 3725 3726 /** 3727 * The currently active parent view for receiving delegated nested scrolling events. 3728 * This is set by {@link #startNestedScroll(int)} during a touch interaction and cleared 3729 * by {@link #stopNestedScroll()} at the same point where we clear 3730 * requestDisallowInterceptTouchEvent. 3731 */ 3732 private ViewParent mNestedScrollingParent; 3733 3734 /** 3735 * Consistency verifier for debugging purposes. 3736 * @hide 3737 */ 3738 protected final InputEventConsistencyVerifier mInputEventConsistencyVerifier = 3739 InputEventConsistencyVerifier.isInstrumentationEnabled() ? 3740 new InputEventConsistencyVerifier(this, 0) : null; 3741 3742 private static final AtomicInteger sNextGeneratedId = new AtomicInteger(1); 3743 3744 private int[] mTempNestedScrollConsumed; 3745 3746 /** 3747 * An overlay is going to draw this View instead of being drawn as part of this 3748 * View's parent. mGhostView is the View in the Overlay that must be invalidated 3749 * when this view is invalidated. 3750 */ 3751 GhostView mGhostView; 3752 3753 /** 3754 * Holds pairs of adjacent attribute data: attribute name followed by its value. 3755 * @hide 3756 */ 3757 @ViewDebug.ExportedProperty(category = "attributes", hasAdjacentMapping = true) 3758 public String[] mAttributes; 3759 3760 /** 3761 * Maps a Resource id to its name. 3762 */ 3763 private static SparseArray<String> mAttributeMap; 3764 3765 /** 3766 * @hide 3767 */ 3768 String mStartActivityRequestWho; 3769 3770 /** 3771 * Simple constructor to use when creating a view from code. 3772 * 3773 * @param context The Context the view is running in, through which it can 3774 * access the current theme, resources, etc. 3775 */ 3776 public View(Context context) { 3777 mContext = context; 3778 mResources = context != null ? context.getResources() : null; 3779 mViewFlags = SOUND_EFFECTS_ENABLED | HAPTIC_FEEDBACK_ENABLED; 3780 // Set some flags defaults 3781 mPrivateFlags2 = 3782 (LAYOUT_DIRECTION_DEFAULT << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) | 3783 (TEXT_DIRECTION_DEFAULT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) | 3784 (PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT) | 3785 (TEXT_ALIGNMENT_DEFAULT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) | 3786 (PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT) | 3787 (IMPORTANT_FOR_ACCESSIBILITY_DEFAULT << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT); 3788 mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); 3789 setOverScrollMode(OVER_SCROLL_IF_CONTENT_SCROLLS); 3790 mUserPaddingStart = UNDEFINED_PADDING; 3791 mUserPaddingEnd = UNDEFINED_PADDING; 3792 mRenderNode = RenderNode.create(getClass().getName(), this); 3793 3794 if (!sCompatibilityDone && context != null) { 3795 final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; 3796 3797 // Older apps may need this compatibility hack for measurement. 3798 sUseBrokenMakeMeasureSpec = targetSdkVersion <= JELLY_BEAN_MR1; 3799 3800 // Older apps expect onMeasure() to always be called on a layout pass, regardless 3801 // of whether a layout was requested on that View. 3802 sIgnoreMeasureCache = targetSdkVersion < KITKAT; 3803 3804 Canvas.sCompatibilityRestore = targetSdkVersion < M; 3805 3806 // In M and newer, our widgets can pass a "hint" value in the size 3807 // for UNSPECIFIED MeasureSpecs. This lets child views of scrolling containers 3808 // know what the expected parent size is going to be, so e.g. list items can size 3809 // themselves at 1/3 the size of their container. It breaks older apps though, 3810 // specifically apps that use some popular open source libraries. 3811 sUseZeroUnspecifiedMeasureSpec = targetSdkVersion < M; 3812 3813 sCompatibilityDone = true; 3814 } 3815 } 3816 3817 /** 3818 * Constructor that is called when inflating a view from XML. This is called 3819 * when a view is being constructed from an XML file, supplying attributes 3820 * that were specified in the XML file. This version uses a default style of 3821 * 0, so the only attribute values applied are those in the Context's Theme 3822 * and the given AttributeSet. 3823 * 3824 * <p> 3825 * The method onFinishInflate() will be called after all children have been 3826 * added. 3827 * 3828 * @param context The Context the view is running in, through which it can 3829 * access the current theme, resources, etc. 3830 * @param attrs The attributes of the XML tag that is inflating the view. 3831 * @see #View(Context, AttributeSet, int) 3832 */ 3833 public View(Context context, @Nullable AttributeSet attrs) { 3834 this(context, attrs, 0); 3835 } 3836 3837 /** 3838 * Perform inflation from XML and apply a class-specific base style from a 3839 * theme attribute. This constructor of View allows subclasses to use their 3840 * own base style when they are inflating. For example, a Button class's 3841 * constructor would call this version of the super class constructor and 3842 * supply <code>R.attr.buttonStyle</code> for <var>defStyleAttr</var>; this 3843 * allows the theme's button style to modify all of the base view attributes 3844 * (in particular its background) as well as the Button class's attributes. 3845 * 3846 * @param context The Context the view is running in, through which it can 3847 * access the current theme, resources, etc. 3848 * @param attrs The attributes of the XML tag that is inflating the view. 3849 * @param defStyleAttr An attribute in the current theme that contains a 3850 * reference to a style resource that supplies default values for 3851 * the view. Can be 0 to not look for defaults. 3852 * @see #View(Context, AttributeSet) 3853 */ 3854 public View(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { 3855 this(context, attrs, defStyleAttr, 0); 3856 } 3857 3858 /** 3859 * Perform inflation from XML and apply a class-specific base style from a 3860 * theme attribute or style resource. This constructor of View allows 3861 * subclasses to use their own base style when they are inflating. 3862 * <p> 3863 * When determining the final value of a particular attribute, there are 3864 * four inputs that come into play: 3865 * <ol> 3866 * <li>Any attribute values in the given AttributeSet. 3867 * <li>The style resource specified in the AttributeSet (named "style"). 3868 * <li>The default style specified by <var>defStyleAttr</var>. 3869 * <li>The default style specified by <var>defStyleRes</var>. 3870 * <li>The base values in this theme. 3871 * </ol> 3872 * <p> 3873 * Each of these inputs is considered in-order, with the first listed taking 3874 * precedence over the following ones. In other words, if in the 3875 * AttributeSet you have supplied <code><Button * textColor="#ff000000"></code> 3876 * , then the button's text will <em>always</em> be black, regardless of 3877 * what is specified in any of the styles. 3878 * 3879 * @param context The Context the view is running in, through which it can 3880 * access the current theme, resources, etc. 3881 * @param attrs The attributes of the XML tag that is inflating the view. 3882 * @param defStyleAttr An attribute in the current theme that contains a 3883 * reference to a style resource that supplies default values for 3884 * the view. Can be 0 to not look for defaults. 3885 * @param defStyleRes A resource identifier of a style resource that 3886 * supplies default values for the view, used only if 3887 * defStyleAttr is 0 or can not be found in the theme. Can be 0 3888 * to not look for defaults. 3889 * @see #View(Context, AttributeSet, int) 3890 */ 3891 public View(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) { 3892 this(context); 3893 3894 final TypedArray a = context.obtainStyledAttributes( 3895 attrs, com.android.internal.R.styleable.View, defStyleAttr, defStyleRes); 3896 3897 if (mDebugViewAttributes) { 3898 saveAttributeData(attrs, a); 3899 } 3900 3901 Drawable background = null; 3902 3903 int leftPadding = -1; 3904 int topPadding = -1; 3905 int rightPadding = -1; 3906 int bottomPadding = -1; 3907 int startPadding = UNDEFINED_PADDING; 3908 int endPadding = UNDEFINED_PADDING; 3909 3910 int padding = -1; 3911 3912 int viewFlagValues = 0; 3913 int viewFlagMasks = 0; 3914 3915 boolean setScrollContainer = false; 3916 3917 int x = 0; 3918 int y = 0; 3919 3920 float tx = 0; 3921 float ty = 0; 3922 float tz = 0; 3923 float elevation = 0; 3924 float rotation = 0; 3925 float rotationX = 0; 3926 float rotationY = 0; 3927 float sx = 1f; 3928 float sy = 1f; 3929 boolean transformSet = false; 3930 3931 int scrollbarStyle = SCROLLBARS_INSIDE_OVERLAY; 3932 int overScrollMode = mOverScrollMode; 3933 boolean initializeScrollbars = false; 3934 boolean initializeScrollIndicators = false; 3935 3936 boolean startPaddingDefined = false; 3937 boolean endPaddingDefined = false; 3938 boolean leftPaddingDefined = false; 3939 boolean rightPaddingDefined = false; 3940 3941 final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; 3942 3943 final int N = a.getIndexCount(); 3944 for (int i = 0; i < N; i++) { 3945 int attr = a.getIndex(i); 3946 switch (attr) { 3947 case com.android.internal.R.styleable.View_background: 3948 background = a.getDrawable(attr); 3949 break; 3950 case com.android.internal.R.styleable.View_padding: 3951 padding = a.getDimensionPixelSize(attr, -1); 3952 mUserPaddingLeftInitial = padding; 3953 mUserPaddingRightInitial = padding; 3954 leftPaddingDefined = true; 3955 rightPaddingDefined = true; 3956 break; 3957 case com.android.internal.R.styleable.View_paddingLeft: 3958 leftPadding = a.getDimensionPixelSize(attr, -1); 3959 mUserPaddingLeftInitial = leftPadding; 3960 leftPaddingDefined = true; 3961 break; 3962 case com.android.internal.R.styleable.View_paddingTop: 3963 topPadding = a.getDimensionPixelSize(attr, -1); 3964 break; 3965 case com.android.internal.R.styleable.View_paddingRight: 3966 rightPadding = a.getDimensionPixelSize(attr, -1); 3967 mUserPaddingRightInitial = rightPadding; 3968 rightPaddingDefined = true; 3969 break; 3970 case com.android.internal.R.styleable.View_paddingBottom: 3971 bottomPadding = a.getDimensionPixelSize(attr, -1); 3972 break; 3973 case com.android.internal.R.styleable.View_paddingStart: 3974 startPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); 3975 startPaddingDefined = (startPadding != UNDEFINED_PADDING); 3976 break; 3977 case com.android.internal.R.styleable.View_paddingEnd: 3978 endPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); 3979 endPaddingDefined = (endPadding != UNDEFINED_PADDING); 3980 break; 3981 case com.android.internal.R.styleable.View_scrollX: 3982 x = a.getDimensionPixelOffset(attr, 0); 3983 break; 3984 case com.android.internal.R.styleable.View_scrollY: 3985 y = a.getDimensionPixelOffset(attr, 0); 3986 break; 3987 case com.android.internal.R.styleable.View_alpha: 3988 setAlpha(a.getFloat(attr, 1f)); 3989 break; 3990 case com.android.internal.R.styleable.View_transformPivotX: 3991 setPivotX(a.getDimensionPixelOffset(attr, 0)); 3992 break; 3993 case com.android.internal.R.styleable.View_transformPivotY: 3994 setPivotY(a.getDimensionPixelOffset(attr, 0)); 3995 break; 3996 case com.android.internal.R.styleable.View_translationX: 3997 tx = a.getDimensionPixelOffset(attr, 0); 3998 transformSet = true; 3999 break; 4000 case com.android.internal.R.styleable.View_translationY: 4001 ty = a.getDimensionPixelOffset(attr, 0); 4002 transformSet = true; 4003 break; 4004 case com.android.internal.R.styleable.View_translationZ: 4005 tz = a.getDimensionPixelOffset(attr, 0); 4006 transformSet = true; 4007 break; 4008 case com.android.internal.R.styleable.View_elevation: 4009 elevation = a.getDimensionPixelOffset(attr, 0); 4010 transformSet = true; 4011 break; 4012 case com.android.internal.R.styleable.View_rotation: 4013 rotation = a.getFloat(attr, 0); 4014 transformSet = true; 4015 break; 4016 case com.android.internal.R.styleable.View_rotationX: 4017 rotationX = a.getFloat(attr, 0); 4018 transformSet = true; 4019 break; 4020 case com.android.internal.R.styleable.View_rotationY: 4021 rotationY = a.getFloat(attr, 0); 4022 transformSet = true; 4023 break; 4024 case com.android.internal.R.styleable.View_scaleX: 4025 sx = a.getFloat(attr, 1f); 4026 transformSet = true; 4027 break; 4028 case com.android.internal.R.styleable.View_scaleY: 4029 sy = a.getFloat(attr, 1f); 4030 transformSet = true; 4031 break; 4032 case com.android.internal.R.styleable.View_id: 4033 mID = a.getResourceId(attr, NO_ID); 4034 break; 4035 case com.android.internal.R.styleable.View_tag: 4036 mTag = a.getText(attr); 4037 break; 4038 case com.android.internal.R.styleable.View_fitsSystemWindows: 4039 if (a.getBoolean(attr, false)) { 4040 viewFlagValues |= FITS_SYSTEM_WINDOWS; 4041 viewFlagMasks |= FITS_SYSTEM_WINDOWS; 4042 } 4043 break; 4044 case com.android.internal.R.styleable.View_focusable: 4045 if (a.getBoolean(attr, false)) { 4046 viewFlagValues |= FOCUSABLE; 4047 viewFlagMasks |= FOCUSABLE_MASK; 4048 } 4049 break; 4050 case com.android.internal.R.styleable.View_focusableInTouchMode: 4051 if (a.getBoolean(attr, false)) { 4052 viewFlagValues |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE; 4053 viewFlagMasks |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE_MASK; 4054 } 4055 break; 4056 case com.android.internal.R.styleable.View_clickable: 4057 if (a.getBoolean(attr, false)) { 4058 viewFlagValues |= CLICKABLE; 4059 viewFlagMasks |= CLICKABLE; 4060 } 4061 break; 4062 case com.android.internal.R.styleable.View_longClickable: 4063 if (a.getBoolean(attr, false)) { 4064 viewFlagValues |= LONG_CLICKABLE; 4065 viewFlagMasks |= LONG_CLICKABLE; 4066 } 4067 break; 4068 case com.android.internal.R.styleable.View_contextClickable: 4069 if (a.getBoolean(attr, false)) { 4070 viewFlagValues |= CONTEXT_CLICKABLE; 4071 viewFlagMasks |= CONTEXT_CLICKABLE; 4072 } 4073 break; 4074 case com.android.internal.R.styleable.View_saveEnabled: 4075 if (!a.getBoolean(attr, true)) { 4076 viewFlagValues |= SAVE_DISABLED; 4077 viewFlagMasks |= SAVE_DISABLED_MASK; 4078 } 4079 break; 4080 case com.android.internal.R.styleable.View_duplicateParentState: 4081 if (a.getBoolean(attr, false)) { 4082 viewFlagValues |= DUPLICATE_PARENT_STATE; 4083 viewFlagMasks |= DUPLICATE_PARENT_STATE; 4084 } 4085 break; 4086 case com.android.internal.R.styleable.View_visibility: 4087 final int visibility = a.getInt(attr, 0); 4088 if (visibility != 0) { 4089 viewFlagValues |= VISIBILITY_FLAGS[visibility]; 4090 viewFlagMasks |= VISIBILITY_MASK; 4091 } 4092 break; 4093 case com.android.internal.R.styleable.View_layoutDirection: 4094 // Clear any layout direction flags (included resolved bits) already set 4095 mPrivateFlags2 &= 4096 ~(PFLAG2_LAYOUT_DIRECTION_MASK | PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK); 4097 // Set the layout direction flags depending on the value of the attribute 4098 final int layoutDirection = a.getInt(attr, -1); 4099 final int value = (layoutDirection != -1) ? 4100 LAYOUT_DIRECTION_FLAGS[layoutDirection] : LAYOUT_DIRECTION_DEFAULT; 4101 mPrivateFlags2 |= (value << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT); 4102 break; 4103 case com.android.internal.R.styleable.View_drawingCacheQuality: 4104 final int cacheQuality = a.getInt(attr, 0); 4105 if (cacheQuality != 0) { 4106 viewFlagValues |= DRAWING_CACHE_QUALITY_FLAGS[cacheQuality]; 4107 viewFlagMasks |= DRAWING_CACHE_QUALITY_MASK; 4108 } 4109 break; 4110 case com.android.internal.R.styleable.View_contentDescription: 4111 setContentDescription(a.getString(attr)); 4112 break; 4113 case com.android.internal.R.styleable.View_accessibilityTraversalBefore: 4114 setAccessibilityTraversalBefore(a.getResourceId(attr, NO_ID)); 4115 break; 4116 case com.android.internal.R.styleable.View_accessibilityTraversalAfter: 4117 setAccessibilityTraversalAfter(a.getResourceId(attr, NO_ID)); 4118 break; 4119 case com.android.internal.R.styleable.View_labelFor: 4120 setLabelFor(a.getResourceId(attr, NO_ID)); 4121 break; 4122 case com.android.internal.R.styleable.View_soundEffectsEnabled: 4123 if (!a.getBoolean(attr, true)) { 4124 viewFlagValues &= ~SOUND_EFFECTS_ENABLED; 4125 viewFlagMasks |= SOUND_EFFECTS_ENABLED; 4126 } 4127 break; 4128 case com.android.internal.R.styleable.View_hapticFeedbackEnabled: 4129 if (!a.getBoolean(attr, true)) { 4130 viewFlagValues &= ~HAPTIC_FEEDBACK_ENABLED; 4131 viewFlagMasks |= HAPTIC_FEEDBACK_ENABLED; 4132 } 4133 break; 4134 case R.styleable.View_scrollbars: 4135 final int scrollbars = a.getInt(attr, SCROLLBARS_NONE); 4136 if (scrollbars != SCROLLBARS_NONE) { 4137 viewFlagValues |= scrollbars; 4138 viewFlagMasks |= SCROLLBARS_MASK; 4139 initializeScrollbars = true; 4140 } 4141 break; 4142 //noinspection deprecation 4143 case R.styleable.View_fadingEdge: 4144 if (targetSdkVersion >= ICE_CREAM_SANDWICH) { 4145 // Ignore the attribute starting with ICS 4146 break; 4147 } 4148 // With builds < ICS, fall through and apply fading edges 4149 case R.styleable.View_requiresFadingEdge: 4150 final int fadingEdge = a.getInt(attr, FADING_EDGE_NONE); 4151 if (fadingEdge != FADING_EDGE_NONE) { 4152 viewFlagValues |= fadingEdge; 4153 viewFlagMasks |= FADING_EDGE_MASK; 4154 initializeFadingEdgeInternal(a); 4155 } 4156 break; 4157 case R.styleable.View_scrollbarStyle: 4158 scrollbarStyle = a.getInt(attr, SCROLLBARS_INSIDE_OVERLAY); 4159 if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { 4160 viewFlagValues |= scrollbarStyle & SCROLLBARS_STYLE_MASK; 4161 viewFlagMasks |= SCROLLBARS_STYLE_MASK; 4162 } 4163 break; 4164 case R.styleable.View_isScrollContainer: 4165 setScrollContainer = true; 4166 if (a.getBoolean(attr, false)) { 4167 setScrollContainer(true); 4168 } 4169 break; 4170 case com.android.internal.R.styleable.View_keepScreenOn: 4171 if (a.getBoolean(attr, false)) { 4172 viewFlagValues |= KEEP_SCREEN_ON; 4173 viewFlagMasks |= KEEP_SCREEN_ON; 4174 } 4175 break; 4176 case R.styleable.View_filterTouchesWhenObscured: 4177 if (a.getBoolean(attr, false)) { 4178 viewFlagValues |= FILTER_TOUCHES_WHEN_OBSCURED; 4179 viewFlagMasks |= FILTER_TOUCHES_WHEN_OBSCURED; 4180 } 4181 break; 4182 case R.styleable.View_nextFocusLeft: 4183 mNextFocusLeftId = a.getResourceId(attr, View.NO_ID); 4184 break; 4185 case R.styleable.View_nextFocusRight: 4186 mNextFocusRightId = a.getResourceId(attr, View.NO_ID); 4187 break; 4188 case R.styleable.View_nextFocusUp: 4189 mNextFocusUpId = a.getResourceId(attr, View.NO_ID); 4190 break; 4191 case R.styleable.View_nextFocusDown: 4192 mNextFocusDownId = a.getResourceId(attr, View.NO_ID); 4193 break; 4194 case R.styleable.View_nextFocusForward: 4195 mNextFocusForwardId = a.getResourceId(attr, View.NO_ID); 4196 break; 4197 case R.styleable.View_minWidth: 4198 mMinWidth = a.getDimensionPixelSize(attr, 0); 4199 break; 4200 case R.styleable.View_minHeight: 4201 mMinHeight = a.getDimensionPixelSize(attr, 0); 4202 break; 4203 case R.styleable.View_onClick: 4204 if (context.isRestricted()) { 4205 throw new IllegalStateException("The android:onClick attribute cannot " 4206 + "be used within a restricted context"); 4207 } 4208 4209 final String handlerName = a.getString(attr); 4210 if (handlerName != null) { 4211 setOnClickListener(new DeclaredOnClickListener(this, handlerName)); 4212 } 4213 break; 4214 case R.styleable.View_overScrollMode: 4215 overScrollMode = a.getInt(attr, OVER_SCROLL_IF_CONTENT_SCROLLS); 4216 break; 4217 case R.styleable.View_verticalScrollbarPosition: 4218 mVerticalScrollbarPosition = a.getInt(attr, SCROLLBAR_POSITION_DEFAULT); 4219 break; 4220 case R.styleable.View_layerType: 4221 setLayerType(a.getInt(attr, LAYER_TYPE_NONE), null); 4222 break; 4223 case R.styleable.View_textDirection: 4224 // Clear any text direction flag already set 4225 mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; 4226 // Set the text direction flags depending on the value of the attribute 4227 final int textDirection = a.getInt(attr, -1); 4228 if (textDirection != -1) { 4229 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_FLAGS[textDirection]; 4230 } 4231 break; 4232 case R.styleable.View_textAlignment: 4233 // Clear any text alignment flag already set 4234 mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; 4235 // Set the text alignment flag depending on the value of the attribute 4236 final int textAlignment = a.getInt(attr, TEXT_ALIGNMENT_DEFAULT); 4237 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_FLAGS[textAlignment]; 4238 break; 4239 case R.styleable.View_importantForAccessibility: 4240 setImportantForAccessibility(a.getInt(attr, 4241 IMPORTANT_FOR_ACCESSIBILITY_DEFAULT)); 4242 break; 4243 case R.styleable.View_accessibilityLiveRegion: 4244 setAccessibilityLiveRegion(a.getInt(attr, ACCESSIBILITY_LIVE_REGION_DEFAULT)); 4245 break; 4246 case R.styleable.View_transitionName: 4247 setTransitionName(a.getString(attr)); 4248 break; 4249 case R.styleable.View_nestedScrollingEnabled: 4250 setNestedScrollingEnabled(a.getBoolean(attr, false)); 4251 break; 4252 case R.styleable.View_stateListAnimator: 4253 setStateListAnimator(AnimatorInflater.loadStateListAnimator(context, 4254 a.getResourceId(attr, 0))); 4255 break; 4256 case R.styleable.View_backgroundTint: 4257 // This will get applied later during setBackground(). 4258 if (mBackgroundTint == null) { 4259 mBackgroundTint = new TintInfo(); 4260 } 4261 mBackgroundTint.mTintList = a.getColorStateList( 4262 R.styleable.View_backgroundTint); 4263 mBackgroundTint.mHasTintList = true; 4264 break; 4265 case R.styleable.View_backgroundTintMode: 4266 // This will get applied later during setBackground(). 4267 if (mBackgroundTint == null) { 4268 mBackgroundTint = new TintInfo(); 4269 } 4270 mBackgroundTint.mTintMode = Drawable.parseTintMode(a.getInt( 4271 R.styleable.View_backgroundTintMode, -1), null); 4272 mBackgroundTint.mHasTintMode = true; 4273 break; 4274 case R.styleable.View_outlineProvider: 4275 setOutlineProviderFromAttribute(a.getInt(R.styleable.View_outlineProvider, 4276 PROVIDER_BACKGROUND)); 4277 break; 4278 case R.styleable.View_foreground: 4279 if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { 4280 setForeground(a.getDrawable(attr)); 4281 } 4282 break; 4283 case R.styleable.View_foregroundGravity: 4284 if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { 4285 setForegroundGravity(a.getInt(attr, Gravity.NO_GRAVITY)); 4286 } 4287 break; 4288 case R.styleable.View_foregroundTintMode: 4289 if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { 4290 setForegroundTintMode(Drawable.parseTintMode(a.getInt(attr, -1), null)); 4291 } 4292 break; 4293 case R.styleable.View_foregroundTint: 4294 if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { 4295 setForegroundTintList(a.getColorStateList(attr)); 4296 } 4297 break; 4298 case R.styleable.View_foregroundInsidePadding: 4299 if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { 4300 if (mForegroundInfo == null) { 4301 mForegroundInfo = new ForegroundInfo(); 4302 } 4303 mForegroundInfo.mInsidePadding = a.getBoolean(attr, 4304 mForegroundInfo.mInsidePadding); 4305 } 4306 break; 4307 case R.styleable.View_scrollIndicators: 4308 final int scrollIndicators = 4309 (a.getInt(attr, 0) << SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT) 4310 & SCROLL_INDICATORS_PFLAG3_MASK; 4311 if (scrollIndicators != 0) { 4312 mPrivateFlags3 |= scrollIndicators; 4313 initializeScrollIndicators = true; 4314 } 4315 break; 4316 } 4317 } 4318 4319 setOverScrollMode(overScrollMode); 4320 4321 // Cache start/end user padding as we cannot fully resolve padding here (we dont have yet 4322 // the resolved layout direction). Those cached values will be used later during padding 4323 // resolution. 4324 mUserPaddingStart = startPadding; 4325 mUserPaddingEnd = endPadding; 4326 4327 if (background != null) { 4328 setBackground(background); 4329 } 4330 4331 // setBackground above will record that padding is currently provided by the background. 4332 // If we have padding specified via xml, record that here instead and use it. 4333 mLeftPaddingDefined = leftPaddingDefined; 4334 mRightPaddingDefined = rightPaddingDefined; 4335 4336 if (padding >= 0) { 4337 leftPadding = padding; 4338 topPadding = padding; 4339 rightPadding = padding; 4340 bottomPadding = padding; 4341 mUserPaddingLeftInitial = padding; 4342 mUserPaddingRightInitial = padding; 4343 } 4344 4345 if (isRtlCompatibilityMode()) { 4346 // RTL compatibility mode: pre Jelly Bean MR1 case OR no RTL support case. 4347 // left / right padding are used if defined (meaning here nothing to do). If they are not 4348 // defined and start / end padding are defined (e.g. in Frameworks resources), then we use 4349 // start / end and resolve them as left / right (layout direction is not taken into account). 4350 // Padding from the background drawable is stored at this point in mUserPaddingLeftInitial 4351 // and mUserPaddingRightInitial) so drawable padding will be used as ultimate default if 4352 // defined. 4353 if (!mLeftPaddingDefined && startPaddingDefined) { 4354 leftPadding = startPadding; 4355 } 4356 mUserPaddingLeftInitial = (leftPadding >= 0) ? leftPadding : mUserPaddingLeftInitial; 4357 if (!mRightPaddingDefined && endPaddingDefined) { 4358 rightPadding = endPadding; 4359 } 4360 mUserPaddingRightInitial = (rightPadding >= 0) ? rightPadding : mUserPaddingRightInitial; 4361 } else { 4362 // Jelly Bean MR1 and after case: if start/end defined, they will override any left/right 4363 // values defined. Otherwise, left /right values are used. 4364 // Padding from the background drawable is stored at this point in mUserPaddingLeftInitial 4365 // and mUserPaddingRightInitial) so drawable padding will be used as ultimate default if 4366 // defined. 4367 final boolean hasRelativePadding = startPaddingDefined || endPaddingDefined; 4368 4369 if (mLeftPaddingDefined && !hasRelativePadding) { 4370 mUserPaddingLeftInitial = leftPadding; 4371 } 4372 if (mRightPaddingDefined && !hasRelativePadding) { 4373 mUserPaddingRightInitial = rightPadding; 4374 } 4375 } 4376 4377 internalSetPadding( 4378 mUserPaddingLeftInitial, 4379 topPadding >= 0 ? topPadding : mPaddingTop, 4380 mUserPaddingRightInitial, 4381 bottomPadding >= 0 ? bottomPadding : mPaddingBottom); 4382 4383 if (viewFlagMasks != 0) { 4384 setFlags(viewFlagValues, viewFlagMasks); 4385 } 4386 4387 if (initializeScrollbars) { 4388 initializeScrollbarsInternal(a); 4389 } 4390 4391 if (initializeScrollIndicators) { 4392 initializeScrollIndicatorsInternal(); 4393 } 4394 4395 a.recycle(); 4396 4397 // Needs to be called after mViewFlags is set 4398 if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { 4399 recomputePadding(); 4400 } 4401 4402 if (x != 0 || y != 0) { 4403 scrollTo(x, y); 4404 } 4405 4406 if (transformSet) { 4407 setTranslationX(tx); 4408 setTranslationY(ty); 4409 setTranslationZ(tz); 4410 setElevation(elevation); 4411 setRotation(rotation); 4412 setRotationX(rotationX); 4413 setRotationY(rotationY); 4414 setScaleX(sx); 4415 setScaleY(sy); 4416 } 4417 4418 if (!setScrollContainer && (viewFlagValues&SCROLLBARS_VERTICAL) != 0) { 4419 setScrollContainer(true); 4420 } 4421 4422 computeOpaqueFlags(); 4423 } 4424 4425 /** 4426 * An implementation of OnClickListener that attempts to lazily load a 4427 * named click handling method from a parent or ancestor context. 4428 */ 4429 private static class DeclaredOnClickListener implements OnClickListener { 4430 private final View mHostView; 4431 private final String mMethodName; 4432 4433 private Method mMethod; 4434 4435 public DeclaredOnClickListener(@NonNull View hostView, @NonNull String methodName) { 4436 mHostView = hostView; 4437 mMethodName = methodName; 4438 } 4439 4440 @Override 4441 public void onClick(@NonNull View v) { 4442 if (mMethod == null) { 4443 mMethod = resolveMethod(mHostView.getContext(), mMethodName); 4444 } 4445 4446 try { 4447 mMethod.invoke(mHostView.getContext(), v); 4448 } catch (IllegalAccessException e) { 4449 throw new IllegalStateException( 4450 "Could not execute non-public method for android:onClick", e); 4451 } catch (InvocationTargetException e) { 4452 throw new IllegalStateException( 4453 "Could not execute method for android:onClick", e); 4454 } 4455 } 4456 4457 @NonNull 4458 private Method resolveMethod(@Nullable Context context, @NonNull String name) { 4459 while (context != null) { 4460 try { 4461 if (!context.isRestricted()) { 4462 return context.getClass().getMethod(mMethodName, View.class); 4463 } 4464 } catch (NoSuchMethodException e) { 4465 // Failed to find method, keep searching up the hierarchy. 4466 } 4467 4468 if (context instanceof ContextWrapper) { 4469 context = ((ContextWrapper) context).getBaseContext(); 4470 } else { 4471 // Can't search up the hierarchy, null out and fail. 4472 context = null; 4473 } 4474 } 4475 4476 final int id = mHostView.getId(); 4477 final String idText = id == NO_ID ? "" : " with id '" 4478 + mHostView.getContext().getResources().getResourceEntryName(id) + "'"; 4479 throw new IllegalStateException("Could not find method " + mMethodName 4480 + "(View) in a parent or ancestor Context for android:onClick " 4481 + "attribute defined on view " + mHostView.getClass() + idText); 4482 } 4483 } 4484 4485 /** 4486 * Non-public constructor for use in testing 4487 */ 4488 View() { 4489 mResources = null; 4490 mRenderNode = RenderNode.create(getClass().getName(), this); 4491 } 4492 4493 private static SparseArray<String> getAttributeMap() { 4494 if (mAttributeMap == null) { 4495 mAttributeMap = new SparseArray<>(); 4496 } 4497 return mAttributeMap; 4498 } 4499 4500 private void saveAttributeData(@Nullable AttributeSet attrs, @NonNull TypedArray t) { 4501 final int attrsCount = attrs == null ? 0 : attrs.getAttributeCount(); 4502 final int indexCount = t.getIndexCount(); 4503 final String[] attributes = new String[(attrsCount + indexCount) * 2]; 4504 4505 int i = 0; 4506 4507 // Store raw XML attributes. 4508 for (int j = 0; j < attrsCount; ++j) { 4509 attributes[i] = attrs.getAttributeName(j); 4510 attributes[i + 1] = attrs.getAttributeValue(j); 4511 i += 2; 4512 } 4513 4514 // Store resolved styleable attributes. 4515 final Resources res = t.getResources(); 4516 final SparseArray<String> attributeMap = getAttributeMap(); 4517 for (int j = 0; j < indexCount; ++j) { 4518 final int index = t.getIndex(j); 4519 if (!t.hasValueOrEmpty(index)) { 4520 // Value is undefined. Skip it. 4521 continue; 4522 } 4523 4524 final int resourceId = t.getResourceId(index, 0); 4525 if (resourceId == 0) { 4526 // Value is not a reference. Skip it. 4527 continue; 4528 } 4529 4530 String resourceName = attributeMap.get(resourceId); 4531 if (resourceName == null) { 4532 try { 4533 resourceName = res.getResourceName(resourceId); 4534 } catch (Resources.NotFoundException e) { 4535 resourceName = "0x" + Integer.toHexString(resourceId); 4536 } 4537 attributeMap.put(resourceId, resourceName); 4538 } 4539 4540 attributes[i] = resourceName; 4541 attributes[i + 1] = t.getString(index); 4542 i += 2; 4543 } 4544 4545 // Trim to fit contents. 4546 final String[] trimmed = new String[i]; 4547 System.arraycopy(attributes, 0, trimmed, 0, i); 4548 mAttributes = trimmed; 4549 } 4550 4551 public String toString() { 4552 StringBuilder out = new StringBuilder(128); 4553 out.append(getClass().getName()); 4554 out.append('{'); 4555 out.append(Integer.toHexString(System.identityHashCode(this))); 4556 out.append(' '); 4557 switch (mViewFlags&VISIBILITY_MASK) { 4558 case VISIBLE: out.append('V'); break; 4559 case INVISIBLE: out.append('I'); break; 4560 case GONE: out.append('G'); break; 4561 default: out.append('.'); break; 4562 } 4563 out.append((mViewFlags&FOCUSABLE_MASK) == FOCUSABLE ? 'F' : '.'); 4564 out.append((mViewFlags&ENABLED_MASK) == ENABLED ? 'E' : '.'); 4565 out.append((mViewFlags&DRAW_MASK) == WILL_NOT_DRAW ? '.' : 'D'); 4566 out.append((mViewFlags&SCROLLBARS_HORIZONTAL) != 0 ? 'H' : '.'); 4567 out.append((mViewFlags&SCROLLBARS_VERTICAL) != 0 ? 'V' : '.'); 4568 out.append((mViewFlags&CLICKABLE) != 0 ? 'C' : '.'); 4569 out.append((mViewFlags&LONG_CLICKABLE) != 0 ? 'L' : '.'); 4570 out.append((mViewFlags&CONTEXT_CLICKABLE) != 0 ? 'X' : '.'); 4571 out.append(' '); 4572 out.append((mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0 ? 'R' : '.'); 4573 out.append((mPrivateFlags&PFLAG_FOCUSED) != 0 ? 'F' : '.'); 4574 out.append((mPrivateFlags&PFLAG_SELECTED) != 0 ? 'S' : '.'); 4575 if ((mPrivateFlags&PFLAG_PREPRESSED) != 0) { 4576 out.append('p'); 4577 } else { 4578 out.append((mPrivateFlags&PFLAG_PRESSED) != 0 ? 'P' : '.'); 4579 } 4580 out.append((mPrivateFlags&PFLAG_HOVERED) != 0 ? 'H' : '.'); 4581 out.append((mPrivateFlags&PFLAG_ACTIVATED) != 0 ? 'A' : '.'); 4582 out.append((mPrivateFlags&PFLAG_INVALIDATED) != 0 ? 'I' : '.'); 4583 out.append((mPrivateFlags&PFLAG_DIRTY_MASK) != 0 ? 'D' : '.'); 4584 out.append(' '); 4585 out.append(mLeft); 4586 out.append(','); 4587 out.append(mTop); 4588 out.append('-'); 4589 out.append(mRight); 4590 out.append(','); 4591 out.append(mBottom); 4592 final int id = getId(); 4593 if (id != NO_ID) { 4594 out.append(" #"); 4595 out.append(Integer.toHexString(id)); 4596 final Resources r = mResources; 4597 if (Resources.resourceHasPackage(id) && r != null) { 4598 try { 4599 String pkgname; 4600 switch (id&0xff000000) { 4601 case 0x7f000000: 4602 pkgname="app"; 4603 break; 4604 case 0x01000000: 4605 pkgname="android"; 4606 break; 4607 default: 4608 pkgname = r.getResourcePackageName(id); 4609 break; 4610 } 4611 String typename = r.getResourceTypeName(id); 4612 String entryname = r.getResourceEntryName(id); 4613 out.append(" "); 4614 out.append(pkgname); 4615 out.append(":"); 4616 out.append(typename); 4617 out.append("/"); 4618 out.append(entryname); 4619 } catch (Resources.NotFoundException e) { 4620 } 4621 } 4622 } 4623 out.append("}"); 4624 return out.toString(); 4625 } 4626 4627 /** 4628 * <p> 4629 * Initializes the fading edges from a given set of styled attributes. This 4630 * method should be called by subclasses that need fading edges and when an 4631 * instance of these subclasses is created programmatically rather than 4632 * being inflated from XML. This method is automatically called when the XML 4633 * is inflated. 4634 * </p> 4635 * 4636 * @param a the styled attributes set to initialize the fading edges from 4637 * 4638 * @removed 4639 */ 4640 protected void initializeFadingEdge(TypedArray a) { 4641 // This method probably shouldn't have been included in the SDK to begin with. 4642 // It relies on 'a' having been initialized using an attribute filter array that is 4643 // not publicly available to the SDK. The old method has been renamed 4644 // to initializeFadingEdgeInternal and hidden for framework use only; 4645 // this one initializes using defaults to make it safe to call for apps. 4646 4647 TypedArray arr = mContext.obtainStyledAttributes(com.android.internal.R.styleable.View); 4648 4649 initializeFadingEdgeInternal(arr); 4650 4651 arr.recycle(); 4652 } 4653 4654 /** 4655 * <p> 4656 * Initializes the fading edges from a given set of styled attributes. This 4657 * method should be called by subclasses that need fading edges and when an 4658 * instance of these subclasses is created programmatically rather than 4659 * being inflated from XML. This method is automatically called when the XML 4660 * is inflated. 4661 * </p> 4662 * 4663 * @param a the styled attributes set to initialize the fading edges from 4664 * @hide This is the real method; the public one is shimmed to be safe to call from apps. 4665 */ 4666 protected void initializeFadingEdgeInternal(TypedArray a) { 4667 initScrollCache(); 4668 4669 mScrollCache.fadingEdgeLength = a.getDimensionPixelSize( 4670 R.styleable.View_fadingEdgeLength, 4671 ViewConfiguration.get(mContext).getScaledFadingEdgeLength()); 4672 } 4673 4674 /** 4675 * Returns the size of the vertical faded edges used to indicate that more 4676 * content in this view is visible. 4677 * 4678 * @return The size in pixels of the vertical faded edge or 0 if vertical 4679 * faded edges are not enabled for this view. 4680 * @attr ref android.R.styleable#View_fadingEdgeLength 4681 */ 4682 public int getVerticalFadingEdgeLength() { 4683 if (isVerticalFadingEdgeEnabled()) { 4684 ScrollabilityCache cache = mScrollCache; 4685 if (cache != null) { 4686 return cache.fadingEdgeLength; 4687 } 4688 } 4689 return 0; 4690 } 4691 4692 /** 4693 * Set the size of the faded edge used to indicate that more content in this 4694 * view is available. Will not change whether the fading edge is enabled; use 4695 * {@link #setVerticalFadingEdgeEnabled(boolean)} or 4696 * {@link #setHorizontalFadingEdgeEnabled(boolean)} to enable the fading edge 4697 * for the vertical or horizontal fading edges. 4698 * 4699 * @param length The size in pixels of the faded edge used to indicate that more 4700 * content in this view is visible. 4701 */ 4702 public void setFadingEdgeLength(int length) { 4703 initScrollCache(); 4704 mScrollCache.fadingEdgeLength = length; 4705 } 4706 4707 /** 4708 * Returns the size of the horizontal faded edges used to indicate that more 4709 * content in this view is visible. 4710 * 4711 * @return The size in pixels of the horizontal faded edge or 0 if horizontal 4712 * faded edges are not enabled for this view. 4713 * @attr ref android.R.styleable#View_fadingEdgeLength 4714 */ 4715 public int getHorizontalFadingEdgeLength() { 4716 if (isHorizontalFadingEdgeEnabled()) { 4717 ScrollabilityCache cache = mScrollCache; 4718 if (cache != null) { 4719 return cache.fadingEdgeLength; 4720 } 4721 } 4722 return 0; 4723 } 4724 4725 /** 4726 * Returns the width of the vertical scrollbar. 4727 * 4728 * @return The width in pixels of the vertical scrollbar or 0 if there 4729 * is no vertical scrollbar. 4730 */ 4731 public int getVerticalScrollbarWidth() { 4732 ScrollabilityCache cache = mScrollCache; 4733 if (cache != null) { 4734 ScrollBarDrawable scrollBar = cache.scrollBar; 4735 if (scrollBar != null) { 4736 int size = scrollBar.getSize(true); 4737 if (size <= 0) { 4738 size = cache.scrollBarSize; 4739 } 4740 return size; 4741 } 4742 return 0; 4743 } 4744 return 0; 4745 } 4746 4747 /** 4748 * Returns the height of the horizontal scrollbar. 4749 * 4750 * @return The height in pixels of the horizontal scrollbar or 0 if 4751 * there is no horizontal scrollbar. 4752 */ 4753 protected int getHorizontalScrollbarHeight() { 4754 ScrollabilityCache cache = mScrollCache; 4755 if (cache != null) { 4756 ScrollBarDrawable scrollBar = cache.scrollBar; 4757 if (scrollBar != null) { 4758 int size = scrollBar.getSize(false); 4759 if (size <= 0) { 4760 size = cache.scrollBarSize; 4761 } 4762 return size; 4763 } 4764 return 0; 4765 } 4766 return 0; 4767 } 4768 4769 /** 4770 * <p> 4771 * Initializes the scrollbars from a given set of styled attributes. This 4772 * method should be called by subclasses that need scrollbars and when an 4773 * instance of these subclasses is created programmatically rather than 4774 * being inflated from XML. This method is automatically called when the XML 4775 * is inflated. 4776 * </p> 4777 * 4778 * @param a the styled attributes set to initialize the scrollbars from 4779 * 4780 * @removed 4781 */ 4782 protected void initializeScrollbars(TypedArray a) { 4783 // It's not safe to use this method from apps. The parameter 'a' must have been obtained 4784 // using the View filter array which is not available to the SDK. As such, internal 4785 // framework usage now uses initializeScrollbarsInternal and we grab a default 4786 // TypedArray with the right filter instead here. 4787 TypedArray arr = mContext.obtainStyledAttributes(com.android.internal.R.styleable.View); 4788 4789 initializeScrollbarsInternal(arr); 4790 4791 // We ignored the method parameter. Recycle the one we actually did use. 4792 arr.recycle(); 4793 } 4794 4795 /** 4796 * <p> 4797 * Initializes the scrollbars from a given set of styled attributes. This 4798 * method should be called by subclasses that need scrollbars and when an 4799 * instance of these subclasses is created programmatically rather than 4800 * being inflated from XML. This method is automatically called when the XML 4801 * is inflated. 4802 * </p> 4803 * 4804 * @param a the styled attributes set to initialize the scrollbars from 4805 * @hide 4806 */ 4807 protected void initializeScrollbarsInternal(TypedArray a) { 4808 initScrollCache(); 4809 4810 final ScrollabilityCache scrollabilityCache = mScrollCache; 4811 4812 if (scrollabilityCache.scrollBar == null) { 4813 scrollabilityCache.scrollBar = new ScrollBarDrawable(); 4814 scrollabilityCache.scrollBar.setCallback(this); 4815 scrollabilityCache.scrollBar.setState(getDrawableState()); 4816 } 4817 4818 final boolean fadeScrollbars = a.getBoolean(R.styleable.View_fadeScrollbars, true); 4819 4820 if (!fadeScrollbars) { 4821 scrollabilityCache.state = ScrollabilityCache.ON; 4822 } 4823 scrollabilityCache.fadeScrollBars = fadeScrollbars; 4824 4825 4826 scrollabilityCache.scrollBarFadeDuration = a.getInt( 4827 R.styleable.View_scrollbarFadeDuration, ViewConfiguration 4828 .getScrollBarFadeDuration()); 4829 scrollabilityCache.scrollBarDefaultDelayBeforeFade = a.getInt( 4830 R.styleable.View_scrollbarDefaultDelayBeforeFade, 4831 ViewConfiguration.getScrollDefaultDelay()); 4832 4833 4834 scrollabilityCache.scrollBarSize = a.getDimensionPixelSize( 4835 com.android.internal.R.styleable.View_scrollbarSize, 4836 ViewConfiguration.get(mContext).getScaledScrollBarSize()); 4837 4838 Drawable track = a.getDrawable(R.styleable.View_scrollbarTrackHorizontal); 4839 scrollabilityCache.scrollBar.setHorizontalTrackDrawable(track); 4840 4841 Drawable thumb = a.getDrawable(R.styleable.View_scrollbarThumbHorizontal); 4842 if (thumb != null) { 4843 scrollabilityCache.scrollBar.setHorizontalThumbDrawable(thumb); 4844 } 4845 4846 boolean alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawHorizontalTrack, 4847 false); 4848 if (alwaysDraw) { 4849 scrollabilityCache.scrollBar.setAlwaysDrawHorizontalTrack(true); 4850 } 4851 4852 track = a.getDrawable(R.styleable.View_scrollbarTrackVertical); 4853 scrollabilityCache.scrollBar.setVerticalTrackDrawable(track); 4854 4855 thumb = a.getDrawable(R.styleable.View_scrollbarThumbVertical); 4856 if (thumb != null) { 4857 scrollabilityCache.scrollBar.setVerticalThumbDrawable(thumb); 4858 } 4859 4860 alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawVerticalTrack, 4861 false); 4862 if (alwaysDraw) { 4863 scrollabilityCache.scrollBar.setAlwaysDrawVerticalTrack(true); 4864 } 4865 4866 // Apply layout direction to the new Drawables if needed 4867 final int layoutDirection = getLayoutDirection(); 4868 if (track != null) { 4869 track.setLayoutDirection(layoutDirection); 4870 } 4871 if (thumb != null) { 4872 thumb.setLayoutDirection(layoutDirection); 4873 } 4874 4875 // Re-apply user/background padding so that scrollbar(s) get added 4876 resolvePadding(); 4877 } 4878 4879 private void initializeScrollIndicatorsInternal() { 4880 // Some day maybe we'll break this into top/left/start/etc. and let the 4881 // client control it. Until then, you can have any scroll indicator you 4882 // want as long as it's a 1dp foreground-colored rectangle. 4883 if (mScrollIndicatorDrawable == null) { 4884 mScrollIndicatorDrawable = mContext.getDrawable(R.drawable.scroll_indicator_material); 4885 } 4886 } 4887 4888 /** 4889 * <p> 4890 * Initalizes the scrollability cache if necessary. 4891 * </p> 4892 */ 4893 private void initScrollCache() { 4894 if (mScrollCache == null) { 4895 mScrollCache = new ScrollabilityCache(ViewConfiguration.get(mContext), this); 4896 } 4897 } 4898 4899 private ScrollabilityCache getScrollCache() { 4900 initScrollCache(); 4901 return mScrollCache; 4902 } 4903 4904 /** 4905 * Set the position of the vertical scroll bar. Should be one of 4906 * {@link #SCROLLBAR_POSITION_DEFAULT}, {@link #SCROLLBAR_POSITION_LEFT} or 4907 * {@link #SCROLLBAR_POSITION_RIGHT}. 4908 * 4909 * @param position Where the vertical scroll bar should be positioned. 4910 */ 4911 public void setVerticalScrollbarPosition(int position) { 4912 if (mVerticalScrollbarPosition != position) { 4913 mVerticalScrollbarPosition = position; 4914 computeOpaqueFlags(); 4915 resolvePadding(); 4916 } 4917 } 4918 4919 /** 4920 * @return The position where the vertical scroll bar will show, if applicable. 4921 * @see #setVerticalScrollbarPosition(int) 4922 */ 4923 public int getVerticalScrollbarPosition() { 4924 return mVerticalScrollbarPosition; 4925 } 4926 4927 /** 4928 * Sets the state of all scroll indicators. 4929 * <p> 4930 * See {@link #setScrollIndicators(int, int)} for usage information. 4931 * 4932 * @param indicators a bitmask of indicators that should be enabled, or 4933 * {@code 0} to disable all indicators 4934 * @see #setScrollIndicators(int, int) 4935 * @see #getScrollIndicators() 4936 * @attr ref android.R.styleable#View_scrollIndicators 4937 */ 4938 public void setScrollIndicators(@ScrollIndicators int indicators) { 4939 setScrollIndicators(indicators, 4940 SCROLL_INDICATORS_PFLAG3_MASK >>> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT); 4941 } 4942 4943 /** 4944 * Sets the state of the scroll indicators specified by the mask. To change 4945 * all scroll indicators at once, see {@link #setScrollIndicators(int)}. 4946 * <p> 4947 * When a scroll indicator is enabled, it will be displayed if the view 4948 * can scroll in the direction of the indicator. 4949 * <p> 4950 * Multiple indicator types may be enabled or disabled by passing the 4951 * logical OR of the desired types. If multiple types are specified, they 4952 * will all be set to the same enabled state. 4953 * <p> 4954 * For example, to enable the top scroll indicatorExample: {@code setScrollIndicators 4955 * 4956 * @param indicators the indicator direction, or the logical OR of multiple 4957 * indicator directions. One or more of: 4958 * <ul> 4959 * <li>{@link #SCROLL_INDICATOR_TOP}</li> 4960 * <li>{@link #SCROLL_INDICATOR_BOTTOM}</li> 4961 * <li>{@link #SCROLL_INDICATOR_LEFT}</li> 4962 * <li>{@link #SCROLL_INDICATOR_RIGHT}</li> 4963 * <li>{@link #SCROLL_INDICATOR_START}</li> 4964 * <li>{@link #SCROLL_INDICATOR_END}</li> 4965 * </ul> 4966 * @see #setScrollIndicators(int) 4967 * @see #getScrollIndicators() 4968 * @attr ref android.R.styleable#View_scrollIndicators 4969 */ 4970 public void setScrollIndicators(@ScrollIndicators int indicators, @ScrollIndicators int mask) { 4971 // Shift and sanitize mask. 4972 mask <<= SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 4973 mask &= SCROLL_INDICATORS_PFLAG3_MASK; 4974 4975 // Shift and mask indicators. 4976 indicators <<= SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 4977 indicators &= mask; 4978 4979 // Merge with non-masked flags. 4980 final int updatedFlags = indicators | (mPrivateFlags3 & ~mask); 4981 4982 if (mPrivateFlags3 != updatedFlags) { 4983 mPrivateFlags3 = updatedFlags; 4984 4985 if (indicators != 0) { 4986 initializeScrollIndicatorsInternal(); 4987 } 4988 invalidate(); 4989 } 4990 } 4991 4992 /** 4993 * Returns a bitmask representing the enabled scroll indicators. 4994 * <p> 4995 * For example, if the top and left scroll indicators are enabled and all 4996 * other indicators are disabled, the return value will be 4997 * {@code View.SCROLL_INDICATOR_TOP | View.SCROLL_INDICATOR_LEFT}. 4998 * <p> 4999 * To check whether the bottom scroll indicator is enabled, use the value 5000 * of {@code (getScrollIndicators() & View.SCROLL_INDICATOR_BOTTOM) != 0}. 5001 * 5002 * @return a bitmask representing the enabled scroll indicators 5003 */ 5004 @ScrollIndicators 5005 public int getScrollIndicators() { 5006 return (mPrivateFlags3 & SCROLL_INDICATORS_PFLAG3_MASK) 5007 >>> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 5008 } 5009 5010 ListenerInfo getListenerInfo() { 5011 if (mListenerInfo != null) { 5012 return mListenerInfo; 5013 } 5014 mListenerInfo = new ListenerInfo(); 5015 return mListenerInfo; 5016 } 5017 5018 /** 5019 * Register a callback to be invoked when the scroll X or Y positions of 5020 * this view change. 5021 * <p> 5022 * <b>Note:</b> Some views handle scrolling independently from View and may 5023 * have their own separate listeners for scroll-type events. For example, 5024 * {@link android.widget.ListView ListView} allows clients to register an 5025 * {@link android.widget.ListView#setOnScrollListener(android.widget.AbsListView.OnScrollListener) AbsListView.OnScrollListener} 5026 * to listen for changes in list scroll position. 5027 * 5028 * @param l The listener to notify when the scroll X or Y position changes. 5029 * @see android.view.View#getScrollX() 5030 * @see android.view.View#getScrollY() 5031 */ 5032 public void setOnScrollChangeListener(OnScrollChangeListener l) { 5033 getListenerInfo().mOnScrollChangeListener = l; 5034 } 5035 5036 /** 5037 * Register a callback to be invoked when focus of this view changed. 5038 * 5039 * @param l The callback that will run. 5040 */ 5041 public void setOnFocusChangeListener(OnFocusChangeListener l) { 5042 getListenerInfo().mOnFocusChangeListener = l; 5043 } 5044 5045 /** 5046 * Add a listener that will be called when the bounds of the view change due to 5047 * layout processing. 5048 * 5049 * @param listener The listener that will be called when layout bounds change. 5050 */ 5051 public void addOnLayoutChangeListener(OnLayoutChangeListener listener) { 5052 ListenerInfo li = getListenerInfo(); 5053 if (li.mOnLayoutChangeListeners == null) { 5054 li.mOnLayoutChangeListeners = new ArrayList<OnLayoutChangeListener>(); 5055 } 5056 if (!li.mOnLayoutChangeListeners.contains(listener)) { 5057 li.mOnLayoutChangeListeners.add(listener); 5058 } 5059 } 5060 5061 /** 5062 * Remove a listener for layout changes. 5063 * 5064 * @param listener The listener for layout bounds change. 5065 */ 5066 public void removeOnLayoutChangeListener(OnLayoutChangeListener listener) { 5067 ListenerInfo li = mListenerInfo; 5068 if (li == null || li.mOnLayoutChangeListeners == null) { 5069 return; 5070 } 5071 li.mOnLayoutChangeListeners.remove(listener); 5072 } 5073 5074 /** 5075 * Add a listener for attach state changes. 5076 * 5077 * This listener will be called whenever this view is attached or detached 5078 * from a window. Remove the listener using 5079 * {@link #removeOnAttachStateChangeListener(OnAttachStateChangeListener)}. 5080 * 5081 * @param listener Listener to attach 5082 * @see #removeOnAttachStateChangeListener(OnAttachStateChangeListener) 5083 */ 5084 public void addOnAttachStateChangeListener(OnAttachStateChangeListener listener) { 5085 ListenerInfo li = getListenerInfo(); 5086 if (li.mOnAttachStateChangeListeners == null) { 5087 li.mOnAttachStateChangeListeners 5088 = new CopyOnWriteArrayList<OnAttachStateChangeListener>(); 5089 } 5090 li.mOnAttachStateChangeListeners.add(listener); 5091 } 5092 5093 /** 5094 * Remove a listener for attach state changes. The listener will receive no further 5095 * notification of window attach/detach events. 5096 * 5097 * @param listener Listener to remove 5098 * @see #addOnAttachStateChangeListener(OnAttachStateChangeListener) 5099 */ 5100 public void removeOnAttachStateChangeListener(OnAttachStateChangeListener listener) { 5101 ListenerInfo li = mListenerInfo; 5102 if (li == null || li.mOnAttachStateChangeListeners == null) { 5103 return; 5104 } 5105 li.mOnAttachStateChangeListeners.remove(listener); 5106 } 5107 5108 /** 5109 * Returns the focus-change callback registered for this view. 5110 * 5111 * @return The callback, or null if one is not registered. 5112 */ 5113 public OnFocusChangeListener getOnFocusChangeListener() { 5114 ListenerInfo li = mListenerInfo; 5115 return li != null ? li.mOnFocusChangeListener : null; 5116 } 5117 5118 /** 5119 * Register a callback to be invoked when this view is clicked. If this view is not 5120 * clickable, it becomes clickable. 5121 * 5122 * @param l The callback that will run 5123 * 5124 * @see #setClickable(boolean) 5125 */ 5126 public void setOnClickListener(@Nullable OnClickListener l) { 5127 if (!isClickable()) { 5128 setClickable(true); 5129 } 5130 getListenerInfo().mOnClickListener = l; 5131 } 5132 5133 /** 5134 * Return whether this view has an attached OnClickListener. Returns 5135 * true if there is a listener, false if there is none. 5136 */ 5137 public boolean hasOnClickListeners() { 5138 ListenerInfo li = mListenerInfo; 5139 return (li != null && li.mOnClickListener != null); 5140 } 5141 5142 /** 5143 * Register a callback to be invoked when this view is clicked and held. If this view is not 5144 * long clickable, it becomes long clickable. 5145 * 5146 * @param l The callback that will run 5147 * 5148 * @see #setLongClickable(boolean) 5149 */ 5150 public void setOnLongClickListener(@Nullable OnLongClickListener l) { 5151 if (!isLongClickable()) { 5152 setLongClickable(true); 5153 } 5154 getListenerInfo().mOnLongClickListener = l; 5155 } 5156 5157 /** 5158 * Register a callback to be invoked when this view is context clicked. If the view is not 5159 * context clickable, it becomes context clickable. 5160 * 5161 * @param l The callback that will run 5162 * @see #setContextClickable(boolean) 5163 */ 5164 public void setOnContextClickListener(@Nullable OnContextClickListener l) { 5165 if (!isContextClickable()) { 5166 setContextClickable(true); 5167 } 5168 getListenerInfo().mOnContextClickListener = l; 5169 } 5170 5171 /** 5172 * Register a callback to be invoked when the context menu for this view is 5173 * being built. If this view is not long clickable, it becomes long clickable. 5174 * 5175 * @param l The callback that will run 5176 * 5177 */ 5178 public void setOnCreateContextMenuListener(OnCreateContextMenuListener l) { 5179 if (!isLongClickable()) { 5180 setLongClickable(true); 5181 } 5182 getListenerInfo().mOnCreateContextMenuListener = l; 5183 } 5184 5185 /** 5186 * Call this view's OnClickListener, if it is defined. Performs all normal 5187 * actions associated with clicking: reporting accessibility event, playing 5188 * a sound, etc. 5189 * 5190 * @return True there was an assigned OnClickListener that was called, false 5191 * otherwise is returned. 5192 */ 5193 public boolean performClick() { 5194 final boolean result; 5195 final ListenerInfo li = mListenerInfo; 5196 if (li != null && li.mOnClickListener != null) { 5197 playSoundEffect(SoundEffectConstants.CLICK); 5198 li.mOnClickListener.onClick(this); 5199 result = true; 5200 } else { 5201 result = false; 5202 } 5203 5204 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); 5205 return result; 5206 } 5207 5208 /** 5209 * Directly call any attached OnClickListener. Unlike {@link #performClick()}, 5210 * this only calls the listener, and does not do any associated clicking 5211 * actions like reporting an accessibility event. 5212 * 5213 * @return True there was an assigned OnClickListener that was called, false 5214 * otherwise is returned. 5215 */ 5216 public boolean callOnClick() { 5217 ListenerInfo li = mListenerInfo; 5218 if (li != null && li.mOnClickListener != null) { 5219 li.mOnClickListener.onClick(this); 5220 return true; 5221 } 5222 return false; 5223 } 5224 5225 /** 5226 * Call this view's OnLongClickListener, if it is defined. Invokes the context menu if the 5227 * OnLongClickListener did not consume the event. 5228 * 5229 * @return True if one of the above receivers consumed the event, false otherwise. 5230 */ 5231 public boolean performLongClick() { 5232 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED); 5233 5234 boolean handled = false; 5235 ListenerInfo li = mListenerInfo; 5236 if (li != null && li.mOnLongClickListener != null) { 5237 handled = li.mOnLongClickListener.onLongClick(View.this); 5238 } 5239 if (!handled) { 5240 handled = showContextMenu(); 5241 } 5242 if (handled) { 5243 performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); 5244 } 5245 return handled; 5246 } 5247 5248 /** 5249 * Call this view's OnContextClickListener, if it is defined. 5250 * 5251 * @return True if there was an assigned OnContextClickListener that consumed the event, false 5252 * otherwise. 5253 */ 5254 public boolean performContextClick() { 5255 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED); 5256 5257 boolean handled = false; 5258 ListenerInfo li = mListenerInfo; 5259 if (li != null && li.mOnContextClickListener != null) { 5260 handled = li.mOnContextClickListener.onContextClick(View.this); 5261 } 5262 if (handled) { 5263 performHapticFeedback(HapticFeedbackConstants.CONTEXT_CLICK); 5264 } 5265 return handled; 5266 } 5267 5268 /** 5269 * Performs button-related actions during a touch down event. 5270 * 5271 * @param event The event. 5272 * @return True if the down was consumed. 5273 * 5274 * @hide 5275 */ 5276 protected boolean performButtonActionOnTouchDown(MotionEvent event) { 5277 if (event.getToolType(0) == MotionEvent.TOOL_TYPE_MOUSE && 5278 (event.getButtonState() & MotionEvent.BUTTON_SECONDARY) != 0) { 5279 showContextMenu(event.getX(), event.getY(), event.getMetaState()); 5280 mPrivateFlags |= PFLAG_CANCEL_NEXT_UP_EVENT; 5281 return true; 5282 } 5283 return false; 5284 } 5285 5286 /** 5287 * Bring up the context menu for this view. 5288 * 5289 * @return Whether a context menu was displayed. 5290 */ 5291 public boolean showContextMenu() { 5292 return getParent().showContextMenuForChild(this); 5293 } 5294 5295 /** 5296 * Bring up the context menu for this view, referring to the item under the specified point. 5297 * 5298 * @param x The referenced x coordinate. 5299 * @param y The referenced y coordinate. 5300 * @param metaState The keyboard modifiers that were pressed. 5301 * @return Whether a context menu was displayed. 5302 * 5303 * @hide 5304 */ 5305 public boolean showContextMenu(float x, float y, int metaState) { 5306 return showContextMenu(); 5307 } 5308 5309 /** 5310 * Start an action mode with the default type {@link ActionMode#TYPE_PRIMARY}. 5311 * 5312 * @param callback Callback that will control the lifecycle of the action mode 5313 * @return The new action mode if it is started, null otherwise 5314 * 5315 * @see ActionMode 5316 * @see #startActionMode(android.view.ActionMode.Callback, int) 5317 */ 5318 public ActionMode startActionMode(ActionMode.Callback callback) { 5319 return startActionMode(callback, ActionMode.TYPE_PRIMARY); 5320 } 5321 5322 /** 5323 * Start an action mode with the given type. 5324 * 5325 * @param callback Callback that will control the lifecycle of the action mode 5326 * @param type One of {@link ActionMode#TYPE_PRIMARY} or {@link ActionMode#TYPE_FLOATING}. 5327 * @return The new action mode if it is started, null otherwise 5328 * 5329 * @see ActionMode 5330 */ 5331 public ActionMode startActionMode(ActionMode.Callback callback, int type) { 5332 ViewParent parent = getParent(); 5333 if (parent == null) return null; 5334 try { 5335 return parent.startActionModeForChild(this, callback, type); 5336 } catch (AbstractMethodError ame) { 5337 // Older implementations of custom views might not implement this. 5338 return parent.startActionModeForChild(this, callback); 5339 } 5340 } 5341 5342 /** 5343 * Call {@link Context#startActivityForResult(String, Intent, int, Bundle)} for the View's 5344 * Context, creating a unique View identifier to retrieve the result. 5345 * 5346 * @param intent The Intent to be started. 5347 * @param requestCode The request code to use. 5348 * @hide 5349 */ 5350 public void startActivityForResult(Intent intent, int requestCode) { 5351 mStartActivityRequestWho = "@android:view:" + System.identityHashCode(this); 5352 getContext().startActivityForResult(mStartActivityRequestWho, intent, requestCode, null); 5353 } 5354 5355 /** 5356 * If this View corresponds to the calling who, dispatches the activity result. 5357 * @param who The identifier for the targeted View to receive the result. 5358 * @param requestCode The integer request code originally supplied to 5359 * startActivityForResult(), allowing you to identify who this 5360 * result came from. 5361 * @param resultCode The integer result code returned by the child activity 5362 * through its setResult(). 5363 * @param data An Intent, which can return result data to the caller 5364 * (various data can be attached to Intent "extras"). 5365 * @return {@code true} if the activity result was dispatched. 5366 * @hide 5367 */ 5368 public boolean dispatchActivityResult( 5369 String who, int requestCode, int resultCode, Intent data) { 5370 if (mStartActivityRequestWho != null && mStartActivityRequestWho.equals(who)) { 5371 onActivityResult(requestCode, resultCode, data); 5372 mStartActivityRequestWho = null; 5373 return true; 5374 } 5375 return false; 5376 } 5377 5378 /** 5379 * Receive the result from a previous call to {@link #startActivityForResult(Intent, int)}. 5380 * 5381 * @param requestCode The integer request code originally supplied to 5382 * startActivityForResult(), allowing you to identify who this 5383 * result came from. 5384 * @param resultCode The integer result code returned by the child activity 5385 * through its setResult(). 5386 * @param data An Intent, which can return result data to the caller 5387 * (various data can be attached to Intent "extras"). 5388 * @hide 5389 */ 5390 public void onActivityResult(int requestCode, int resultCode, Intent data) { 5391 // Do nothing. 5392 } 5393 5394 /** 5395 * Register a callback to be invoked when a hardware key is pressed in this view. 5396 * Key presses in software input methods will generally not trigger the methods of 5397 * this listener. 5398 * @param l the key listener to attach to this view 5399 */ 5400 public void setOnKeyListener(OnKeyListener l) { 5401 getListenerInfo().mOnKeyListener = l; 5402 } 5403 5404 /** 5405 * Register a callback to be invoked when a touch event is sent to this view. 5406 * @param l the touch listener to attach to this view 5407 */ 5408 public void setOnTouchListener(OnTouchListener l) { 5409 getListenerInfo().mOnTouchListener = l; 5410 } 5411 5412 /** 5413 * Register a callback to be invoked when a generic motion event is sent to this view. 5414 * @param l the generic motion listener to attach to this view 5415 */ 5416 public void setOnGenericMotionListener(OnGenericMotionListener l) { 5417 getListenerInfo().mOnGenericMotionListener = l; 5418 } 5419 5420 /** 5421 * Register a callback to be invoked when a hover event is sent to this view. 5422 * @param l the hover listener to attach to this view 5423 */ 5424 public void setOnHoverListener(OnHoverListener l) { 5425 getListenerInfo().mOnHoverListener = l; 5426 } 5427 5428 /** 5429 * Register a drag event listener callback object for this View. The parameter is 5430 * an implementation of {@link android.view.View.OnDragListener}. To send a drag event to a 5431 * View, the system calls the 5432 * {@link android.view.View.OnDragListener#onDrag(View,DragEvent)} method. 5433 * @param l An implementation of {@link android.view.View.OnDragListener}. 5434 */ 5435 public void setOnDragListener(OnDragListener l) { 5436 getListenerInfo().mOnDragListener = l; 5437 } 5438 5439 /** 5440 * Give this view focus. This will cause 5441 * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} to be called. 5442 * 5443 * Note: this does not check whether this {@link View} should get focus, it just 5444 * gives it focus no matter what. It should only be called internally by framework 5445 * code that knows what it is doing, namely {@link #requestFocus(int, Rect)}. 5446 * 5447 * @param direction values are {@link View#FOCUS_UP}, {@link View#FOCUS_DOWN}, 5448 * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT}. This is the direction which 5449 * focus moved when requestFocus() is called. It may not always 5450 * apply, in which case use the default View.FOCUS_DOWN. 5451 * @param previouslyFocusedRect The rectangle of the view that had focus 5452 * prior in this View's coordinate system. 5453 */ 5454 void handleFocusGainInternal(@FocusRealDirection int direction, Rect previouslyFocusedRect) { 5455 if (DBG) { 5456 System.out.println(this + " requestFocus()"); 5457 } 5458 5459 if ((mPrivateFlags & PFLAG_FOCUSED) == 0) { 5460 mPrivateFlags |= PFLAG_FOCUSED; 5461 5462 View oldFocus = (mAttachInfo != null) ? getRootView().findFocus() : null; 5463 5464 if (mParent != null) { 5465 mParent.requestChildFocus(this, this); 5466 } 5467 5468 if (mAttachInfo != null) { 5469 mAttachInfo.mTreeObserver.dispatchOnGlobalFocusChange(oldFocus, this); 5470 } 5471 5472 onFocusChanged(true, direction, previouslyFocusedRect); 5473 refreshDrawableState(); 5474 } 5475 } 5476 5477 /** 5478 * Populates <code>outRect</code> with the hotspot bounds. By default, 5479 * the hotspot bounds are identical to the screen bounds. 5480 * 5481 * @param outRect rect to populate with hotspot bounds 5482 * @hide Only for internal use by views and widgets. 5483 */ 5484 public void getHotspotBounds(Rect outRect) { 5485 final Drawable background = getBackground(); 5486 if (background != null) { 5487 background.getHotspotBounds(outRect); 5488 } else { 5489 getBoundsOnScreen(outRect); 5490 } 5491 } 5492 5493 /** 5494 * Request that a rectangle of this view be visible on the screen, 5495 * scrolling if necessary just enough. 5496 * 5497 * <p>A View should call this if it maintains some notion of which part 5498 * of its content is interesting. For example, a text editing view 5499 * should call this when its cursor moves. 5500 * 5501 * @param rectangle The rectangle. 5502 * @return Whether any parent scrolled. 5503 */ 5504 public boolean requestRectangleOnScreen(Rect rectangle) { 5505 return requestRectangleOnScreen(rectangle, false); 5506 } 5507 5508 /** 5509 * Request that a rectangle of this view be visible on the screen, 5510 * scrolling if necessary just enough. 5511 * 5512 * <p>A View should call this if it maintains some notion of which part 5513 * of its content is interesting. For example, a text editing view 5514 * should call this when its cursor moves. 5515 * 5516 * <p>When <code>immediate</code> is set to true, scrolling will not be 5517 * animated. 5518 * 5519 * @param rectangle The rectangle. 5520 * @param immediate True to forbid animated scrolling, false otherwise 5521 * @return Whether any parent scrolled. 5522 */ 5523 public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { 5524 if (mParent == null) { 5525 return false; 5526 } 5527 5528 View child = this; 5529 5530 RectF position = (mAttachInfo != null) ? mAttachInfo.mTmpTransformRect : new RectF(); 5531 position.set(rectangle); 5532 5533 ViewParent parent = mParent; 5534 boolean scrolled = false; 5535 while (parent != null) { 5536 rectangle.set((int) position.left, (int) position.top, 5537 (int) position.right, (int) position.bottom); 5538 5539 scrolled |= parent.requestChildRectangleOnScreen(child, 5540 rectangle, immediate); 5541 5542 if (!child.hasIdentityMatrix()) { 5543 child.getMatrix().mapRect(position); 5544 } 5545 5546 position.offset(child.mLeft, child.mTop); 5547 5548 if (!(parent instanceof View)) { 5549 break; 5550 } 5551 5552 View parentView = (View) parent; 5553 5554 position.offset(-parentView.getScrollX(), -parentView.getScrollY()); 5555 5556 child = parentView; 5557 parent = child.getParent(); 5558 } 5559 5560 return scrolled; 5561 } 5562 5563 /** 5564 * Called when this view wants to give up focus. If focus is cleared 5565 * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} is called. 5566 * <p> 5567 * <strong>Note:</strong> When a View clears focus the framework is trying 5568 * to give focus to the first focusable View from the top. Hence, if this 5569 * View is the first from the top that can take focus, then all callbacks 5570 * related to clearing focus will be invoked after which the framework will 5571 * give focus to this view. 5572 * </p> 5573 */ 5574 public void clearFocus() { 5575 if (DBG) { 5576 System.out.println(this + " clearFocus()"); 5577 } 5578 5579 clearFocusInternal(null, true, true); 5580 } 5581 5582 /** 5583 * Clears focus from the view, optionally propagating the change up through 5584 * the parent hierarchy and requesting that the root view place new focus. 5585 * 5586 * @param propagate whether to propagate the change up through the parent 5587 * hierarchy 5588 * @param refocus when propagate is true, specifies whether to request the 5589 * root view place new focus 5590 */ 5591 void clearFocusInternal(View focused, boolean propagate, boolean refocus) { 5592 if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { 5593 mPrivateFlags &= ~PFLAG_FOCUSED; 5594 5595 if (propagate && mParent != null) { 5596 mParent.clearChildFocus(this); 5597 } 5598 5599 onFocusChanged(false, 0, null); 5600 refreshDrawableState(); 5601 5602 if (propagate && (!refocus || !rootViewRequestFocus())) { 5603 notifyGlobalFocusCleared(this); 5604 } 5605 } 5606 } 5607 5608 void notifyGlobalFocusCleared(View oldFocus) { 5609 if (oldFocus != null && mAttachInfo != null) { 5610 mAttachInfo.mTreeObserver.dispatchOnGlobalFocusChange(oldFocus, null); 5611 } 5612 } 5613 5614 boolean rootViewRequestFocus() { 5615 final View root = getRootView(); 5616 return root != null && root.requestFocus(); 5617 } 5618 5619 /** 5620 * Called internally by the view system when a new view is getting focus. 5621 * This is what clears the old focus. 5622 * <p> 5623 * <b>NOTE:</b> The parent view's focused child must be updated manually 5624 * after calling this method. Otherwise, the view hierarchy may be left in 5625 * an inconstent state. 5626 */ 5627 void unFocus(View focused) { 5628 if (DBG) { 5629 System.out.println(this + " unFocus()"); 5630 } 5631 5632 clearFocusInternal(focused, false, false); 5633 } 5634 5635 /** 5636 * Returns true if this view has focus itself, or is the ancestor of the 5637 * view that has focus. 5638 * 5639 * @return True if this view has or contains focus, false otherwise. 5640 */ 5641 @ViewDebug.ExportedProperty(category = "focus") 5642 public boolean hasFocus() { 5643 return (mPrivateFlags & PFLAG_FOCUSED) != 0; 5644 } 5645 5646 /** 5647 * Returns true if this view is focusable or if it contains a reachable View 5648 * for which {@link #hasFocusable()} returns true. A "reachable hasFocusable()" 5649 * is a View whose parents do not block descendants focus. 5650 * 5651 * Only {@link #VISIBLE} views are considered focusable. 5652 * 5653 * @return True if the view is focusable or if the view contains a focusable 5654 * View, false otherwise. 5655 * 5656 * @see ViewGroup#FOCUS_BLOCK_DESCENDANTS 5657 * @see ViewGroup#getTouchscreenBlocksFocus() 5658 */ 5659 public boolean hasFocusable() { 5660 if (!isFocusableInTouchMode()) { 5661 for (ViewParent p = mParent; p instanceof ViewGroup; p = p.getParent()) { 5662 final ViewGroup g = (ViewGroup) p; 5663 if (g.shouldBlockFocusForTouchscreen()) { 5664 return false; 5665 } 5666 } 5667 } 5668 return (mViewFlags & VISIBILITY_MASK) == VISIBLE && isFocusable(); 5669 } 5670 5671 /** 5672 * Called by the view system when the focus state of this view changes. 5673 * When the focus change event is caused by directional navigation, direction 5674 * and previouslyFocusedRect provide insight into where the focus is coming from. 5675 * When overriding, be sure to call up through to the super class so that 5676 * the standard focus handling will occur. 5677 * 5678 * @param gainFocus True if the View has focus; false otherwise. 5679 * @param direction The direction focus has moved when requestFocus() 5680 * is called to give this view focus. Values are 5681 * {@link #FOCUS_UP}, {@link #FOCUS_DOWN}, {@link #FOCUS_LEFT}, 5682 * {@link #FOCUS_RIGHT}, {@link #FOCUS_FORWARD}, or {@link #FOCUS_BACKWARD}. 5683 * It may not always apply, in which case use the default. 5684 * @param previouslyFocusedRect The rectangle, in this view's coordinate 5685 * system, of the previously focused view. If applicable, this will be 5686 * passed in as finer grained information about where the focus is coming 5687 * from (in addition to direction). Will be <code>null</code> otherwise. 5688 */ 5689 @CallSuper 5690 protected void onFocusChanged(boolean gainFocus, @FocusDirection int direction, 5691 @Nullable Rect previouslyFocusedRect) { 5692 if (gainFocus) { 5693 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED); 5694 } else { 5695 notifyViewAccessibilityStateChangedIfNeeded( 5696 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 5697 } 5698 5699 InputMethodManager imm = InputMethodManager.peekInstance(); 5700 if (!gainFocus) { 5701 if (isPressed()) { 5702 setPressed(false); 5703 } 5704 if (imm != null && mAttachInfo != null 5705 && mAttachInfo.mHasWindowFocus) { 5706 imm.focusOut(this); 5707 } 5708 onFocusLost(); 5709 } else if (imm != null && mAttachInfo != null 5710 && mAttachInfo.mHasWindowFocus) { 5711 imm.focusIn(this); 5712 } 5713 5714 invalidate(true); 5715 ListenerInfo li = mListenerInfo; 5716 if (li != null && li.mOnFocusChangeListener != null) { 5717 li.mOnFocusChangeListener.onFocusChange(this, gainFocus); 5718 } 5719 5720 if (mAttachInfo != null) { 5721 mAttachInfo.mKeyDispatchState.reset(this); 5722 } 5723 } 5724 5725 /** 5726 * Sends an accessibility event of the given type. If accessibility is 5727 * not enabled this method has no effect. The default implementation calls 5728 * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)} first 5729 * to populate information about the event source (this View), then calls 5730 * {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} to 5731 * populate the text content of the event source including its descendants, 5732 * and last calls 5733 * {@link ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent)} 5734 * on its parent to request sending of the event to interested parties. 5735 * <p> 5736 * If an {@link AccessibilityDelegate} has been specified via calling 5737 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5738 * {@link AccessibilityDelegate#sendAccessibilityEvent(View, int)} is 5739 * responsible for handling this call. 5740 * </p> 5741 * 5742 * @param eventType The type of the event to send, as defined by several types from 5743 * {@link android.view.accessibility.AccessibilityEvent}, such as 5744 * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_CLICKED} or 5745 * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_HOVER_ENTER}. 5746 * 5747 * @see #onInitializeAccessibilityEvent(AccessibilityEvent) 5748 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5749 * @see ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent) 5750 * @see AccessibilityDelegate 5751 */ 5752 public void sendAccessibilityEvent(int eventType) { 5753 if (mAccessibilityDelegate != null) { 5754 mAccessibilityDelegate.sendAccessibilityEvent(this, eventType); 5755 } else { 5756 sendAccessibilityEventInternal(eventType); 5757 } 5758 } 5759 5760 /** 5761 * Convenience method for sending a {@link AccessibilityEvent#TYPE_ANNOUNCEMENT} 5762 * {@link AccessibilityEvent} to make an announcement which is related to some 5763 * sort of a context change for which none of the events representing UI transitions 5764 * is a good fit. For example, announcing a new page in a book. If accessibility 5765 * is not enabled this method does nothing. 5766 * 5767 * @param text The announcement text. 5768 */ 5769 public void announceForAccessibility(CharSequence text) { 5770 if (AccessibilityManager.getInstance(mContext).isEnabled() && mParent != null) { 5771 AccessibilityEvent event = AccessibilityEvent.obtain( 5772 AccessibilityEvent.TYPE_ANNOUNCEMENT); 5773 onInitializeAccessibilityEvent(event); 5774 event.getText().add(text); 5775 event.setContentDescription(null); 5776 mParent.requestSendAccessibilityEvent(this, event); 5777 } 5778 } 5779 5780 /** 5781 * @see #sendAccessibilityEvent(int) 5782 * 5783 * Note: Called from the default {@link AccessibilityDelegate}. 5784 * 5785 * @hide 5786 */ 5787 public void sendAccessibilityEventInternal(int eventType) { 5788 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 5789 sendAccessibilityEventUnchecked(AccessibilityEvent.obtain(eventType)); 5790 } 5791 } 5792 5793 /** 5794 * This method behaves exactly as {@link #sendAccessibilityEvent(int)} but 5795 * takes as an argument an empty {@link AccessibilityEvent} and does not 5796 * perform a check whether accessibility is enabled. 5797 * <p> 5798 * If an {@link AccessibilityDelegate} has been specified via calling 5799 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5800 * {@link AccessibilityDelegate#sendAccessibilityEventUnchecked(View, AccessibilityEvent)} 5801 * is responsible for handling this call. 5802 * </p> 5803 * 5804 * @param event The event to send. 5805 * 5806 * @see #sendAccessibilityEvent(int) 5807 */ 5808 public void sendAccessibilityEventUnchecked(AccessibilityEvent event) { 5809 if (mAccessibilityDelegate != null) { 5810 mAccessibilityDelegate.sendAccessibilityEventUnchecked(this, event); 5811 } else { 5812 sendAccessibilityEventUncheckedInternal(event); 5813 } 5814 } 5815 5816 /** 5817 * @see #sendAccessibilityEventUnchecked(AccessibilityEvent) 5818 * 5819 * Note: Called from the default {@link AccessibilityDelegate}. 5820 * 5821 * @hide 5822 */ 5823 public void sendAccessibilityEventUncheckedInternal(AccessibilityEvent event) { 5824 if (!isShown()) { 5825 return; 5826 } 5827 onInitializeAccessibilityEvent(event); 5828 // Only a subset of accessibility events populates text content. 5829 if ((event.getEventType() & POPULATING_ACCESSIBILITY_EVENT_TYPES) != 0) { 5830 dispatchPopulateAccessibilityEvent(event); 5831 } 5832 // In the beginning we called #isShown(), so we know that getParent() is not null. 5833 getParent().requestSendAccessibilityEvent(this, event); 5834 } 5835 5836 /** 5837 * Dispatches an {@link AccessibilityEvent} to the {@link View} first and then 5838 * to its children for adding their text content to the event. Note that the 5839 * event text is populated in a separate dispatch path since we add to the 5840 * event not only the text of the source but also the text of all its descendants. 5841 * A typical implementation will call 5842 * {@link #onPopulateAccessibilityEvent(AccessibilityEvent)} on the this view 5843 * and then call the {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} 5844 * on each child. Override this method if custom population of the event text 5845 * content is required. 5846 * <p> 5847 * If an {@link AccessibilityDelegate} has been specified via calling 5848 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5849 * {@link AccessibilityDelegate#dispatchPopulateAccessibilityEvent(View, AccessibilityEvent)} 5850 * is responsible for handling this call. 5851 * </p> 5852 * <p> 5853 * <em>Note:</em> Accessibility events of certain types are not dispatched for 5854 * populating the event text via this method. For details refer to {@link AccessibilityEvent}. 5855 * </p> 5856 * 5857 * @param event The event. 5858 * 5859 * @return True if the event population was completed. 5860 */ 5861 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 5862 if (mAccessibilityDelegate != null) { 5863 return mAccessibilityDelegate.dispatchPopulateAccessibilityEvent(this, event); 5864 } else { 5865 return dispatchPopulateAccessibilityEventInternal(event); 5866 } 5867 } 5868 5869 /** 5870 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5871 * 5872 * Note: Called from the default {@link AccessibilityDelegate}. 5873 * 5874 * @hide 5875 */ 5876 public boolean dispatchPopulateAccessibilityEventInternal(AccessibilityEvent event) { 5877 onPopulateAccessibilityEvent(event); 5878 return false; 5879 } 5880 5881 /** 5882 * Called from {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} 5883 * giving a chance to this View to populate the accessibility event with its 5884 * text content. While this method is free to modify event 5885 * attributes other than text content, doing so should normally be performed in 5886 * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)}. 5887 * <p> 5888 * Example: Adding formatted date string to an accessibility event in addition 5889 * to the text added by the super implementation: 5890 * <pre> public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 5891 * super.onPopulateAccessibilityEvent(event); 5892 * final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_WEEKDAY; 5893 * String selectedDateUtterance = DateUtils.formatDateTime(mContext, 5894 * mCurrentDate.getTimeInMillis(), flags); 5895 * event.getText().add(selectedDateUtterance); 5896 * }</pre> 5897 * <p> 5898 * If an {@link AccessibilityDelegate} has been specified via calling 5899 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5900 * {@link AccessibilityDelegate#onPopulateAccessibilityEvent(View, AccessibilityEvent)} 5901 * is responsible for handling this call. 5902 * </p> 5903 * <p class="note"><strong>Note:</strong> Always call the super implementation before adding 5904 * information to the event, in case the default implementation has basic information to add. 5905 * </p> 5906 * 5907 * @param event The accessibility event which to populate. 5908 * 5909 * @see #sendAccessibilityEvent(int) 5910 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5911 */ 5912 @CallSuper 5913 public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 5914 if (mAccessibilityDelegate != null) { 5915 mAccessibilityDelegate.onPopulateAccessibilityEvent(this, event); 5916 } else { 5917 onPopulateAccessibilityEventInternal(event); 5918 } 5919 } 5920 5921 /** 5922 * @see #onPopulateAccessibilityEvent(AccessibilityEvent) 5923 * 5924 * Note: Called from the default {@link AccessibilityDelegate}. 5925 * 5926 * @hide 5927 */ 5928 public void onPopulateAccessibilityEventInternal(AccessibilityEvent event) { 5929 } 5930 5931 /** 5932 * Initializes an {@link AccessibilityEvent} with information about 5933 * this View which is the event source. In other words, the source of 5934 * an accessibility event is the view whose state change triggered firing 5935 * the event. 5936 * <p> 5937 * Example: Setting the password property of an event in addition 5938 * to properties set by the super implementation: 5939 * <pre> public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 5940 * super.onInitializeAccessibilityEvent(event); 5941 * event.setPassword(true); 5942 * }</pre> 5943 * <p> 5944 * If an {@link AccessibilityDelegate} has been specified via calling 5945 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 5946 * {@link AccessibilityDelegate#onInitializeAccessibilityEvent(View, AccessibilityEvent)} 5947 * is responsible for handling this call. 5948 * </p> 5949 * <p class="note"><strong>Note:</strong> Always call the super implementation before adding 5950 * information to the event, in case the default implementation has basic information to add. 5951 * </p> 5952 * @param event The event to initialize. 5953 * 5954 * @see #sendAccessibilityEvent(int) 5955 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 5956 */ 5957 @CallSuper 5958 public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 5959 if (mAccessibilityDelegate != null) { 5960 mAccessibilityDelegate.onInitializeAccessibilityEvent(this, event); 5961 } else { 5962 onInitializeAccessibilityEventInternal(event); 5963 } 5964 } 5965 5966 /** 5967 * @see #onInitializeAccessibilityEvent(AccessibilityEvent) 5968 * 5969 * Note: Called from the default {@link AccessibilityDelegate}. 5970 * 5971 * @hide 5972 */ 5973 public void onInitializeAccessibilityEventInternal(AccessibilityEvent event) { 5974 event.setSource(this); 5975 event.setClassName(getAccessibilityClassName()); 5976 event.setPackageName(getContext().getPackageName()); 5977 event.setEnabled(isEnabled()); 5978 event.setContentDescription(mContentDescription); 5979 5980 switch (event.getEventType()) { 5981 case AccessibilityEvent.TYPE_VIEW_FOCUSED: { 5982 ArrayList<View> focusablesTempList = (mAttachInfo != null) 5983 ? mAttachInfo.mTempArrayList : new ArrayList<View>(); 5984 getRootView().addFocusables(focusablesTempList, View.FOCUS_FORWARD, FOCUSABLES_ALL); 5985 event.setItemCount(focusablesTempList.size()); 5986 event.setCurrentItemIndex(focusablesTempList.indexOf(this)); 5987 if (mAttachInfo != null) { 5988 focusablesTempList.clear(); 5989 } 5990 } break; 5991 case AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED: { 5992 CharSequence text = getIterableTextForAccessibility(); 5993 if (text != null && text.length() > 0) { 5994 event.setFromIndex(getAccessibilitySelectionStart()); 5995 event.setToIndex(getAccessibilitySelectionEnd()); 5996 event.setItemCount(text.length()); 5997 } 5998 } break; 5999 } 6000 } 6001 6002 /** 6003 * Returns an {@link AccessibilityNodeInfo} representing this view from the 6004 * point of view of an {@link android.accessibilityservice.AccessibilityService}. 6005 * This method is responsible for obtaining an accessibility node info from a 6006 * pool of reusable instances and calling 6007 * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on this view to 6008 * initialize the former. 6009 * <p> 6010 * Note: The client is responsible for recycling the obtained instance by calling 6011 * {@link AccessibilityNodeInfo#recycle()} to minimize object creation. 6012 * </p> 6013 * 6014 * @return A populated {@link AccessibilityNodeInfo}. 6015 * 6016 * @see AccessibilityNodeInfo 6017 */ 6018 public AccessibilityNodeInfo createAccessibilityNodeInfo() { 6019 if (mAccessibilityDelegate != null) { 6020 return mAccessibilityDelegate.createAccessibilityNodeInfo(this); 6021 } else { 6022 return createAccessibilityNodeInfoInternal(); 6023 } 6024 } 6025 6026 /** 6027 * @see #createAccessibilityNodeInfo() 6028 * 6029 * @hide 6030 */ 6031 public AccessibilityNodeInfo createAccessibilityNodeInfoInternal() { 6032 AccessibilityNodeProvider provider = getAccessibilityNodeProvider(); 6033 if (provider != null) { 6034 return provider.createAccessibilityNodeInfo(AccessibilityNodeProvider.HOST_VIEW_ID); 6035 } else { 6036 AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(this); 6037 onInitializeAccessibilityNodeInfo(info); 6038 return info; 6039 } 6040 } 6041 6042 /** 6043 * Initializes an {@link AccessibilityNodeInfo} with information about this view. 6044 * The base implementation sets: 6045 * <ul> 6046 * <li>{@link AccessibilityNodeInfo#setParent(View)},</li> 6047 * <li>{@link AccessibilityNodeInfo#setBoundsInParent(Rect)},</li> 6048 * <li>{@link AccessibilityNodeInfo#setBoundsInScreen(Rect)},</li> 6049 * <li>{@link AccessibilityNodeInfo#setPackageName(CharSequence)},</li> 6050 * <li>{@link AccessibilityNodeInfo#setClassName(CharSequence)},</li> 6051 * <li>{@link AccessibilityNodeInfo#setContentDescription(CharSequence)},</li> 6052 * <li>{@link AccessibilityNodeInfo#setEnabled(boolean)},</li> 6053 * <li>{@link AccessibilityNodeInfo#setClickable(boolean)},</li> 6054 * <li>{@link AccessibilityNodeInfo#setFocusable(boolean)},</li> 6055 * <li>{@link AccessibilityNodeInfo#setFocused(boolean)},</li> 6056 * <li>{@link AccessibilityNodeInfo#setLongClickable(boolean)},</li> 6057 * <li>{@link AccessibilityNodeInfo#setSelected(boolean)},</li> 6058 * <li>{@link AccessibilityNodeInfo#setContextClickable(boolean)}</li> 6059 * </ul> 6060 * <p> 6061 * Subclasses should override this method, call the super implementation, 6062 * and set additional attributes. 6063 * </p> 6064 * <p> 6065 * If an {@link AccessibilityDelegate} has been specified via calling 6066 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 6067 * {@link AccessibilityDelegate#onInitializeAccessibilityNodeInfo(View, AccessibilityNodeInfo)} 6068 * is responsible for handling this call. 6069 * </p> 6070 * 6071 * @param info The instance to initialize. 6072 */ 6073 @CallSuper 6074 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 6075 if (mAccessibilityDelegate != null) { 6076 mAccessibilityDelegate.onInitializeAccessibilityNodeInfo(this, info); 6077 } else { 6078 onInitializeAccessibilityNodeInfoInternal(info); 6079 } 6080 } 6081 6082 /** 6083 * Gets the location of this view in screen coordinates. 6084 * 6085 * @param outRect The output location 6086 * @hide 6087 */ 6088 public void getBoundsOnScreen(Rect outRect) { 6089 getBoundsOnScreen(outRect, false); 6090 } 6091 6092 /** 6093 * Gets the location of this view in screen coordinates. 6094 * 6095 * @param outRect The output location 6096 * @param clipToParent Whether to clip child bounds to the parent ones. 6097 * @hide 6098 */ 6099 public void getBoundsOnScreen(Rect outRect, boolean clipToParent) { 6100 if (mAttachInfo == null) { 6101 return; 6102 } 6103 6104 RectF position = mAttachInfo.mTmpTransformRect; 6105 position.set(0, 0, mRight - mLeft, mBottom - mTop); 6106 6107 if (!hasIdentityMatrix()) { 6108 getMatrix().mapRect(position); 6109 } 6110 6111 position.offset(mLeft, mTop); 6112 6113 ViewParent parent = mParent; 6114 while (parent instanceof View) { 6115 View parentView = (View) parent; 6116 6117 position.offset(-parentView.mScrollX, -parentView.mScrollY); 6118 6119 if (clipToParent) { 6120 position.left = Math.max(position.left, 0); 6121 position.top = Math.max(position.top, 0); 6122 position.right = Math.min(position.right, parentView.getWidth()); 6123 position.bottom = Math.min(position.bottom, parentView.getHeight()); 6124 } 6125 6126 if (!parentView.hasIdentityMatrix()) { 6127 parentView.getMatrix().mapRect(position); 6128 } 6129 6130 position.offset(parentView.mLeft, parentView.mTop); 6131 6132 parent = parentView.mParent; 6133 } 6134 6135 if (parent instanceof ViewRootImpl) { 6136 ViewRootImpl viewRootImpl = (ViewRootImpl) parent; 6137 position.offset(0, -viewRootImpl.mCurScrollY); 6138 } 6139 6140 position.offset(mAttachInfo.mWindowLeft, mAttachInfo.mWindowTop); 6141 6142 outRect.set((int) (position.left + 0.5f), (int) (position.top + 0.5f), 6143 (int) (position.right + 0.5f), (int) (position.bottom + 0.5f)); 6144 } 6145 6146 /** 6147 * Return the class name of this object to be used for accessibility purposes. 6148 * Subclasses should only override this if they are implementing something that 6149 * should be seen as a completely new class of view when used by accessibility, 6150 * unrelated to the class it is deriving from. This is used to fill in 6151 * {@link AccessibilityNodeInfo#setClassName AccessibilityNodeInfo.setClassName}. 6152 */ 6153 public CharSequence getAccessibilityClassName() { 6154 return View.class.getName(); 6155 } 6156 6157 /** 6158 * Called when assist structure is being retrieved from a view as part of 6159 * {@link android.app.Activity#onProvideAssistData Activity.onProvideAssistData}. 6160 * @param structure Fill in with structured view data. The default implementation 6161 * fills in all data that can be inferred from the view itself. 6162 */ 6163 public void onProvideStructure(ViewStructure structure) { 6164 final int id = mID; 6165 if (id > 0 && (id&0xff000000) != 0 && (id&0x00ff0000) != 0 6166 && (id&0x0000ffff) != 0) { 6167 String pkg, type, entry; 6168 try { 6169 final Resources res = getResources(); 6170 entry = res.getResourceEntryName(id); 6171 type = res.getResourceTypeName(id); 6172 pkg = res.getResourcePackageName(id); 6173 } catch (Resources.NotFoundException e) { 6174 entry = type = pkg = null; 6175 } 6176 structure.setId(id, pkg, type, entry); 6177 } else { 6178 structure.setId(id, null, null, null); 6179 } 6180 structure.setDimens(mLeft, mTop, mScrollX, mScrollY, mRight - mLeft, mBottom - mTop); 6181 if (!hasIdentityMatrix()) { 6182 structure.setTransformation(getMatrix()); 6183 } 6184 structure.setElevation(getZ()); 6185 structure.setVisibility(getVisibility()); 6186 structure.setEnabled(isEnabled()); 6187 if (isClickable()) { 6188 structure.setClickable(true); 6189 } 6190 if (isFocusable()) { 6191 structure.setFocusable(true); 6192 } 6193 if (isFocused()) { 6194 structure.setFocused(true); 6195 } 6196 if (isAccessibilityFocused()) { 6197 structure.setAccessibilityFocused(true); 6198 } 6199 if (isSelected()) { 6200 structure.setSelected(true); 6201 } 6202 if (isActivated()) { 6203 structure.setActivated(true); 6204 } 6205 if (isLongClickable()) { 6206 structure.setLongClickable(true); 6207 } 6208 if (this instanceof Checkable) { 6209 structure.setCheckable(true); 6210 if (((Checkable)this).isChecked()) { 6211 structure.setChecked(true); 6212 } 6213 } 6214 if (isContextClickable()) { 6215 structure.setContextClickable(true); 6216 } 6217 structure.setClassName(getAccessibilityClassName().toString()); 6218 structure.setContentDescription(getContentDescription()); 6219 } 6220 6221 /** 6222 * Called when assist structure is being retrieved from a view as part of 6223 * {@link android.app.Activity#onProvideAssistData Activity.onProvideAssistData} to 6224 * generate additional virtual structure under this view. The defaullt implementation 6225 * uses {@link #getAccessibilityNodeProvider()} to try to generate this from the 6226 * view's virtual accessibility nodes, if any. You can override this for a more 6227 * optimal implementation providing this data. 6228 */ 6229 public void onProvideVirtualStructure(ViewStructure structure) { 6230 AccessibilityNodeProvider provider = getAccessibilityNodeProvider(); 6231 if (provider != null) { 6232 AccessibilityNodeInfo info = createAccessibilityNodeInfo(); 6233 structure.setChildCount(1); 6234 ViewStructure root = structure.newChild(0); 6235 populateVirtualStructure(root, provider, info); 6236 info.recycle(); 6237 } 6238 } 6239 6240 private void populateVirtualStructure(ViewStructure structure, 6241 AccessibilityNodeProvider provider, AccessibilityNodeInfo info) { 6242 structure.setId(AccessibilityNodeInfo.getVirtualDescendantId(info.getSourceNodeId()), 6243 null, null, null); 6244 Rect rect = structure.getTempRect(); 6245 info.getBoundsInParent(rect); 6246 structure.setDimens(rect.left, rect.top, 0, 0, rect.width(), rect.height()); 6247 structure.setVisibility(VISIBLE); 6248 structure.setEnabled(info.isEnabled()); 6249 if (info.isClickable()) { 6250 structure.setClickable(true); 6251 } 6252 if (info.isFocusable()) { 6253 structure.setFocusable(true); 6254 } 6255 if (info.isFocused()) { 6256 structure.setFocused(true); 6257 } 6258 if (info.isAccessibilityFocused()) { 6259 structure.setAccessibilityFocused(true); 6260 } 6261 if (info.isSelected()) { 6262 structure.setSelected(true); 6263 } 6264 if (info.isLongClickable()) { 6265 structure.setLongClickable(true); 6266 } 6267 if (info.isCheckable()) { 6268 structure.setCheckable(true); 6269 if (info.isChecked()) { 6270 structure.setChecked(true); 6271 } 6272 } 6273 if (info.isContextClickable()) { 6274 structure.setContextClickable(true); 6275 } 6276 CharSequence cname = info.getClassName(); 6277 structure.setClassName(cname != null ? cname.toString() : null); 6278 structure.setContentDescription(info.getContentDescription()); 6279 if (info.getText() != null || info.getError() != null) { 6280 structure.setText(info.getText(), info.getTextSelectionStart(), 6281 info.getTextSelectionEnd()); 6282 } 6283 final int NCHILDREN = info.getChildCount(); 6284 if (NCHILDREN > 0) { 6285 structure.setChildCount(NCHILDREN); 6286 for (int i=0; i<NCHILDREN; i++) { 6287 AccessibilityNodeInfo cinfo = provider.createAccessibilityNodeInfo( 6288 AccessibilityNodeInfo.getVirtualDescendantId(info.getChildId(i))); 6289 ViewStructure child = structure.newChild(i); 6290 populateVirtualStructure(child, provider, cinfo); 6291 cinfo.recycle(); 6292 } 6293 } 6294 } 6295 6296 /** 6297 * Dispatch creation of {@link ViewStructure} down the hierarchy. The default 6298 * implementation calls {@link #onProvideStructure} and 6299 * {@link #onProvideVirtualStructure}. 6300 */ 6301 public void dispatchProvideStructure(ViewStructure structure) { 6302 if (!isAssistBlocked()) { 6303 onProvideStructure(structure); 6304 onProvideVirtualStructure(structure); 6305 } else { 6306 structure.setClassName(getAccessibilityClassName().toString()); 6307 structure.setAssistBlocked(true); 6308 } 6309 } 6310 6311 /** 6312 * @see #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 6313 * 6314 * Note: Called from the default {@link AccessibilityDelegate}. 6315 * 6316 * @hide 6317 */ 6318 public void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) { 6319 if (mAttachInfo == null) { 6320 return; 6321 } 6322 6323 Rect bounds = mAttachInfo.mTmpInvalRect; 6324 6325 getDrawingRect(bounds); 6326 info.setBoundsInParent(bounds); 6327 6328 getBoundsOnScreen(bounds, true); 6329 info.setBoundsInScreen(bounds); 6330 6331 ViewParent parent = getParentForAccessibility(); 6332 if (parent instanceof View) { 6333 info.setParent((View) parent); 6334 } 6335 6336 if (mID != View.NO_ID) { 6337 View rootView = getRootView(); 6338 if (rootView == null) { 6339 rootView = this; 6340 } 6341 6342 View label = rootView.findLabelForView(this, mID); 6343 if (label != null) { 6344 info.setLabeledBy(label); 6345 } 6346 6347 if ((mAttachInfo.mAccessibilityFetchFlags 6348 & AccessibilityNodeInfo.FLAG_REPORT_VIEW_IDS) != 0 6349 && Resources.resourceHasPackage(mID)) { 6350 try { 6351 String viewId = getResources().getResourceName(mID); 6352 info.setViewIdResourceName(viewId); 6353 } catch (Resources.NotFoundException nfe) { 6354 /* ignore */ 6355 } 6356 } 6357 } 6358 6359 if (mLabelForId != View.NO_ID) { 6360 View rootView = getRootView(); 6361 if (rootView == null) { 6362 rootView = this; 6363 } 6364 View labeled = rootView.findViewInsideOutShouldExist(this, mLabelForId); 6365 if (labeled != null) { 6366 info.setLabelFor(labeled); 6367 } 6368 } 6369 6370 if (mAccessibilityTraversalBeforeId != View.NO_ID) { 6371 View rootView = getRootView(); 6372 if (rootView == null) { 6373 rootView = this; 6374 } 6375 View next = rootView.findViewInsideOutShouldExist(this, 6376 mAccessibilityTraversalBeforeId); 6377 if (next != null && next.includeForAccessibility()) { 6378 info.setTraversalBefore(next); 6379 } 6380 } 6381 6382 if (mAccessibilityTraversalAfterId != View.NO_ID) { 6383 View rootView = getRootView(); 6384 if (rootView == null) { 6385 rootView = this; 6386 } 6387 View next = rootView.findViewInsideOutShouldExist(this, 6388 mAccessibilityTraversalAfterId); 6389 if (next != null && next.includeForAccessibility()) { 6390 info.setTraversalAfter(next); 6391 } 6392 } 6393 6394 info.setVisibleToUser(isVisibleToUser()); 6395 6396 info.setPackageName(mContext.getPackageName()); 6397 info.setClassName(getAccessibilityClassName()); 6398 info.setContentDescription(getContentDescription()); 6399 6400 info.setEnabled(isEnabled()); 6401 info.setClickable(isClickable()); 6402 info.setFocusable(isFocusable()); 6403 info.setFocused(isFocused()); 6404 info.setAccessibilityFocused(isAccessibilityFocused()); 6405 info.setSelected(isSelected()); 6406 info.setLongClickable(isLongClickable()); 6407 info.setContextClickable(isContextClickable()); 6408 info.setLiveRegion(getAccessibilityLiveRegion()); 6409 6410 // TODO: These make sense only if we are in an AdapterView but all 6411 // views can be selected. Maybe from accessibility perspective 6412 // we should report as selectable view in an AdapterView. 6413 info.addAction(AccessibilityNodeInfo.ACTION_SELECT); 6414 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_SELECTION); 6415 6416 if (isFocusable()) { 6417 if (isFocused()) { 6418 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_FOCUS); 6419 } else { 6420 info.addAction(AccessibilityNodeInfo.ACTION_FOCUS); 6421 } 6422 } 6423 6424 if (!isAccessibilityFocused()) { 6425 info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS); 6426 } else { 6427 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS); 6428 } 6429 6430 if (isClickable() && isEnabled()) { 6431 info.addAction(AccessibilityNodeInfo.ACTION_CLICK); 6432 } 6433 6434 if (isLongClickable() && isEnabled()) { 6435 info.addAction(AccessibilityNodeInfo.ACTION_LONG_CLICK); 6436 } 6437 6438 if (isContextClickable() && isEnabled()) { 6439 info.addAction(AccessibilityAction.ACTION_CONTEXT_CLICK); 6440 } 6441 6442 CharSequence text = getIterableTextForAccessibility(); 6443 if (text != null && text.length() > 0) { 6444 info.setTextSelection(getAccessibilitySelectionStart(), getAccessibilitySelectionEnd()); 6445 6446 info.addAction(AccessibilityNodeInfo.ACTION_SET_SELECTION); 6447 info.addAction(AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY); 6448 info.addAction(AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY); 6449 info.setMovementGranularities(AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER 6450 | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD 6451 | AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH); 6452 } 6453 6454 info.addAction(AccessibilityAction.ACTION_SHOW_ON_SCREEN); 6455 } 6456 6457 private View findLabelForView(View view, int labeledId) { 6458 if (mMatchLabelForPredicate == null) { 6459 mMatchLabelForPredicate = new MatchLabelForPredicate(); 6460 } 6461 mMatchLabelForPredicate.mLabeledId = labeledId; 6462 return findViewByPredicateInsideOut(view, mMatchLabelForPredicate); 6463 } 6464 6465 /** 6466 * Computes whether this view is visible to the user. Such a view is 6467 * attached, visible, all its predecessors are visible, it is not clipped 6468 * entirely by its predecessors, and has an alpha greater than zero. 6469 * 6470 * @return Whether the view is visible on the screen. 6471 * 6472 * @hide 6473 */ 6474 protected boolean isVisibleToUser() { 6475 return isVisibleToUser(null); 6476 } 6477 6478 /** 6479 * Computes whether the given portion of this view is visible to the user. 6480 * Such a view is attached, visible, all its predecessors are visible, 6481 * has an alpha greater than zero, and the specified portion is not 6482 * clipped entirely by its predecessors. 6483 * 6484 * @param boundInView the portion of the view to test; coordinates should be relative; may be 6485 * <code>null</code>, and the entire view will be tested in this case. 6486 * When <code>true</code> is returned by the function, the actual visible 6487 * region will be stored in this parameter; that is, if boundInView is fully 6488 * contained within the view, no modification will be made, otherwise regions 6489 * outside of the visible area of the view will be clipped. 6490 * 6491 * @return Whether the specified portion of the view is visible on the screen. 6492 * 6493 * @hide 6494 */ 6495 protected boolean isVisibleToUser(Rect boundInView) { 6496 if (mAttachInfo != null) { 6497 // Attached to invisible window means this view is not visible. 6498 if (mAttachInfo.mWindowVisibility != View.VISIBLE) { 6499 return false; 6500 } 6501 // An invisible predecessor or one with alpha zero means 6502 // that this view is not visible to the user. 6503 Object current = this; 6504 while (current instanceof View) { 6505 View view = (View) current; 6506 // We have attach info so this view is attached and there is no 6507 // need to check whether we reach to ViewRootImpl on the way up. 6508 if (view.getAlpha() <= 0 || view.getTransitionAlpha() <= 0 || 6509 view.getVisibility() != VISIBLE) { 6510 return false; 6511 } 6512 current = view.mParent; 6513 } 6514 // Check if the view is entirely covered by its predecessors. 6515 Rect visibleRect = mAttachInfo.mTmpInvalRect; 6516 Point offset = mAttachInfo.mPoint; 6517 if (!getGlobalVisibleRect(visibleRect, offset)) { 6518 return false; 6519 } 6520 // Check if the visible portion intersects the rectangle of interest. 6521 if (boundInView != null) { 6522 visibleRect.offset(-offset.x, -offset.y); 6523 return boundInView.intersect(visibleRect); 6524 } 6525 return true; 6526 } 6527 return false; 6528 } 6529 6530 /** 6531 * Returns the delegate for implementing accessibility support via 6532 * composition. For more details see {@link AccessibilityDelegate}. 6533 * 6534 * @return The delegate, or null if none set. 6535 * 6536 * @hide 6537 */ 6538 public AccessibilityDelegate getAccessibilityDelegate() { 6539 return mAccessibilityDelegate; 6540 } 6541 6542 /** 6543 * Sets a delegate for implementing accessibility support via composition as 6544 * opposed to inheritance. The delegate's primary use is for implementing 6545 * backwards compatible widgets. For more details see {@link AccessibilityDelegate}. 6546 * 6547 * @param delegate The delegate instance. 6548 * 6549 * @see AccessibilityDelegate 6550 */ 6551 public void setAccessibilityDelegate(@Nullable AccessibilityDelegate delegate) { 6552 mAccessibilityDelegate = delegate; 6553 } 6554 6555 /** 6556 * Gets the provider for managing a virtual view hierarchy rooted at this View 6557 * and reported to {@link android.accessibilityservice.AccessibilityService}s 6558 * that explore the window content. 6559 * <p> 6560 * If this method returns an instance, this instance is responsible for managing 6561 * {@link AccessibilityNodeInfo}s describing the virtual sub-tree rooted at this 6562 * View including the one representing the View itself. Similarly the returned 6563 * instance is responsible for performing accessibility actions on any virtual 6564 * view or the root view itself. 6565 * </p> 6566 * <p> 6567 * If an {@link AccessibilityDelegate} has been specified via calling 6568 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 6569 * {@link AccessibilityDelegate#getAccessibilityNodeProvider(View)} 6570 * is responsible for handling this call. 6571 * </p> 6572 * 6573 * @return The provider. 6574 * 6575 * @see AccessibilityNodeProvider 6576 */ 6577 public AccessibilityNodeProvider getAccessibilityNodeProvider() { 6578 if (mAccessibilityDelegate != null) { 6579 return mAccessibilityDelegate.getAccessibilityNodeProvider(this); 6580 } else { 6581 return null; 6582 } 6583 } 6584 6585 /** 6586 * Gets the unique identifier of this view on the screen for accessibility purposes. 6587 * If this {@link View} is not attached to any window, {@value #NO_ID} is returned. 6588 * 6589 * @return The view accessibility id. 6590 * 6591 * @hide 6592 */ 6593 public int getAccessibilityViewId() { 6594 if (mAccessibilityViewId == NO_ID) { 6595 mAccessibilityViewId = sNextAccessibilityViewId++; 6596 } 6597 return mAccessibilityViewId; 6598 } 6599 6600 /** 6601 * Gets the unique identifier of the window in which this View reseides. 6602 * 6603 * @return The window accessibility id. 6604 * 6605 * @hide 6606 */ 6607 public int getAccessibilityWindowId() { 6608 return mAttachInfo != null ? mAttachInfo.mAccessibilityWindowId 6609 : AccessibilityNodeInfo.UNDEFINED_ITEM_ID; 6610 } 6611 6612 /** 6613 * Gets the {@link View} description. It briefly describes the view and is 6614 * primarily used for accessibility support. Set this property to enable 6615 * better accessibility support for your application. This is especially 6616 * true for views that do not have textual representation (For example, 6617 * ImageButton). 6618 * 6619 * @return The content description. 6620 * 6621 * @attr ref android.R.styleable#View_contentDescription 6622 */ 6623 @ViewDebug.ExportedProperty(category = "accessibility") 6624 public CharSequence getContentDescription() { 6625 return mContentDescription; 6626 } 6627 6628 /** 6629 * Sets the {@link View} description. It briefly describes the view and is 6630 * primarily used for accessibility support. Set this property to enable 6631 * better accessibility support for your application. This is especially 6632 * true for views that do not have textual representation (For example, 6633 * ImageButton). 6634 * 6635 * @param contentDescription The content description. 6636 * 6637 * @attr ref android.R.styleable#View_contentDescription 6638 */ 6639 @RemotableViewMethod 6640 public void setContentDescription(CharSequence contentDescription) { 6641 if (mContentDescription == null) { 6642 if (contentDescription == null) { 6643 return; 6644 } 6645 } else if (mContentDescription.equals(contentDescription)) { 6646 return; 6647 } 6648 mContentDescription = contentDescription; 6649 final boolean nonEmptyDesc = contentDescription != null && contentDescription.length() > 0; 6650 if (nonEmptyDesc && getImportantForAccessibility() == IMPORTANT_FOR_ACCESSIBILITY_AUTO) { 6651 setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES); 6652 notifySubtreeAccessibilityStateChangedIfNeeded(); 6653 } else { 6654 notifyViewAccessibilityStateChangedIfNeeded( 6655 AccessibilityEvent.CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION); 6656 } 6657 } 6658 6659 /** 6660 * Sets the id of a view before which this one is visited in accessibility traversal. 6661 * A screen-reader must visit the content of this view before the content of the one 6662 * it precedes. For example, if view B is set to be before view A, then a screen-reader 6663 * will traverse the entire content of B before traversing the entire content of A, 6664 * regardles of what traversal strategy it is using. 6665 * <p> 6666 * Views that do not have specified before/after relationships are traversed in order 6667 * determined by the screen-reader. 6668 * </p> 6669 * <p> 6670 * Setting that this view is before a view that is not important for accessibility 6671 * or if this view is not important for accessibility will have no effect as the 6672 * screen-reader is not aware of unimportant views. 6673 * </p> 6674 * 6675 * @param beforeId The id of a view this one precedes in accessibility traversal. 6676 * 6677 * @attr ref android.R.styleable#View_accessibilityTraversalBefore 6678 * 6679 * @see #setImportantForAccessibility(int) 6680 */ 6681 @RemotableViewMethod 6682 public void setAccessibilityTraversalBefore(int beforeId) { 6683 if (mAccessibilityTraversalBeforeId == beforeId) { 6684 return; 6685 } 6686 mAccessibilityTraversalBeforeId = beforeId; 6687 notifyViewAccessibilityStateChangedIfNeeded( 6688 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 6689 } 6690 6691 /** 6692 * Gets the id of a view before which this one is visited in accessibility traversal. 6693 * 6694 * @return The id of a view this one precedes in accessibility traversal if 6695 * specified, otherwise {@link #NO_ID}. 6696 * 6697 * @see #setAccessibilityTraversalBefore(int) 6698 */ 6699 public int getAccessibilityTraversalBefore() { 6700 return mAccessibilityTraversalBeforeId; 6701 } 6702 6703 /** 6704 * Sets the id of a view after which this one is visited in accessibility traversal. 6705 * A screen-reader must visit the content of the other view before the content of this 6706 * one. For example, if view B is set to be after view A, then a screen-reader 6707 * will traverse the entire content of A before traversing the entire content of B, 6708 * regardles of what traversal strategy it is using. 6709 * <p> 6710 * Views that do not have specified before/after relationships are traversed in order 6711 * determined by the screen-reader. 6712 * </p> 6713 * <p> 6714 * Setting that this view is after a view that is not important for accessibility 6715 * or if this view is not important for accessibility will have no effect as the 6716 * screen-reader is not aware of unimportant views. 6717 * </p> 6718 * 6719 * @param afterId The id of a view this one succedees in accessibility traversal. 6720 * 6721 * @attr ref android.R.styleable#View_accessibilityTraversalAfter 6722 * 6723 * @see #setImportantForAccessibility(int) 6724 */ 6725 @RemotableViewMethod 6726 public void setAccessibilityTraversalAfter(int afterId) { 6727 if (mAccessibilityTraversalAfterId == afterId) { 6728 return; 6729 } 6730 mAccessibilityTraversalAfterId = afterId; 6731 notifyViewAccessibilityStateChangedIfNeeded( 6732 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 6733 } 6734 6735 /** 6736 * Gets the id of a view after which this one is visited in accessibility traversal. 6737 * 6738 * @return The id of a view this one succeedes in accessibility traversal if 6739 * specified, otherwise {@link #NO_ID}. 6740 * 6741 * @see #setAccessibilityTraversalAfter(int) 6742 */ 6743 public int getAccessibilityTraversalAfter() { 6744 return mAccessibilityTraversalAfterId; 6745 } 6746 6747 /** 6748 * Gets the id of a view for which this view serves as a label for 6749 * accessibility purposes. 6750 * 6751 * @return The labeled view id. 6752 */ 6753 @ViewDebug.ExportedProperty(category = "accessibility") 6754 public int getLabelFor() { 6755 return mLabelForId; 6756 } 6757 6758 /** 6759 * Sets the id of a view for which this view serves as a label for 6760 * accessibility purposes. 6761 * 6762 * @param id The labeled view id. 6763 */ 6764 @RemotableViewMethod 6765 public void setLabelFor(@IdRes int id) { 6766 if (mLabelForId == id) { 6767 return; 6768 } 6769 mLabelForId = id; 6770 if (mLabelForId != View.NO_ID 6771 && mID == View.NO_ID) { 6772 mID = generateViewId(); 6773 } 6774 notifyViewAccessibilityStateChangedIfNeeded( 6775 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 6776 } 6777 6778 /** 6779 * Invoked whenever this view loses focus, either by losing window focus or by losing 6780 * focus within its window. This method can be used to clear any state tied to the 6781 * focus. For instance, if a button is held pressed with the trackball and the window 6782 * loses focus, this method can be used to cancel the press. 6783 * 6784 * Subclasses of View overriding this method should always call super.onFocusLost(). 6785 * 6786 * @see #onFocusChanged(boolean, int, android.graphics.Rect) 6787 * @see #onWindowFocusChanged(boolean) 6788 * 6789 * @hide pending API council approval 6790 */ 6791 @CallSuper 6792 protected void onFocusLost() { 6793 resetPressedState(); 6794 } 6795 6796 private void resetPressedState() { 6797 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 6798 return; 6799 } 6800 6801 if (isPressed()) { 6802 setPressed(false); 6803 6804 if (!mHasPerformedLongPress) { 6805 removeLongPressCallback(); 6806 } 6807 } 6808 } 6809 6810 /** 6811 * Returns true if this view has focus 6812 * 6813 * @return True if this view has focus, false otherwise. 6814 */ 6815 @ViewDebug.ExportedProperty(category = "focus") 6816 public boolean isFocused() { 6817 return (mPrivateFlags & PFLAG_FOCUSED) != 0; 6818 } 6819 6820 /** 6821 * Find the view in the hierarchy rooted at this view that currently has 6822 * focus. 6823 * 6824 * @return The view that currently has focus, or null if no focused view can 6825 * be found. 6826 */ 6827 public View findFocus() { 6828 return (mPrivateFlags & PFLAG_FOCUSED) != 0 ? this : null; 6829 } 6830 6831 /** 6832 * Indicates whether this view is one of the set of scrollable containers in 6833 * its window. 6834 * 6835 * @return whether this view is one of the set of scrollable containers in 6836 * its window 6837 * 6838 * @attr ref android.R.styleable#View_isScrollContainer 6839 */ 6840 public boolean isScrollContainer() { 6841 return (mPrivateFlags & PFLAG_SCROLL_CONTAINER_ADDED) != 0; 6842 } 6843 6844 /** 6845 * Change whether this view is one of the set of scrollable containers in 6846 * its window. This will be used to determine whether the window can 6847 * resize or must pan when a soft input area is open -- scrollable 6848 * containers allow the window to use resize mode since the container 6849 * will appropriately shrink. 6850 * 6851 * @attr ref android.R.styleable#View_isScrollContainer 6852 */ 6853 public void setScrollContainer(boolean isScrollContainer) { 6854 if (isScrollContainer) { 6855 if (mAttachInfo != null && (mPrivateFlags&PFLAG_SCROLL_CONTAINER_ADDED) == 0) { 6856 mAttachInfo.mScrollContainers.add(this); 6857 mPrivateFlags |= PFLAG_SCROLL_CONTAINER_ADDED; 6858 } 6859 mPrivateFlags |= PFLAG_SCROLL_CONTAINER; 6860 } else { 6861 if ((mPrivateFlags&PFLAG_SCROLL_CONTAINER_ADDED) != 0) { 6862 mAttachInfo.mScrollContainers.remove(this); 6863 } 6864 mPrivateFlags &= ~(PFLAG_SCROLL_CONTAINER|PFLAG_SCROLL_CONTAINER_ADDED); 6865 } 6866 } 6867 6868 /** 6869 * Returns the quality of the drawing cache. 6870 * 6871 * @return One of {@link #DRAWING_CACHE_QUALITY_AUTO}, 6872 * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} 6873 * 6874 * @see #setDrawingCacheQuality(int) 6875 * @see #setDrawingCacheEnabled(boolean) 6876 * @see #isDrawingCacheEnabled() 6877 * 6878 * @attr ref android.R.styleable#View_drawingCacheQuality 6879 */ 6880 @DrawingCacheQuality 6881 public int getDrawingCacheQuality() { 6882 return mViewFlags & DRAWING_CACHE_QUALITY_MASK; 6883 } 6884 6885 /** 6886 * Set the drawing cache quality of this view. This value is used only when the 6887 * drawing cache is enabled 6888 * 6889 * @param quality One of {@link #DRAWING_CACHE_QUALITY_AUTO}, 6890 * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} 6891 * 6892 * @see #getDrawingCacheQuality() 6893 * @see #setDrawingCacheEnabled(boolean) 6894 * @see #isDrawingCacheEnabled() 6895 * 6896 * @attr ref android.R.styleable#View_drawingCacheQuality 6897 */ 6898 public void setDrawingCacheQuality(@DrawingCacheQuality int quality) { 6899 setFlags(quality, DRAWING_CACHE_QUALITY_MASK); 6900 } 6901 6902 /** 6903 * Returns whether the screen should remain on, corresponding to the current 6904 * value of {@link #KEEP_SCREEN_ON}. 6905 * 6906 * @return Returns true if {@link #KEEP_SCREEN_ON} is set. 6907 * 6908 * @see #setKeepScreenOn(boolean) 6909 * 6910 * @attr ref android.R.styleable#View_keepScreenOn 6911 */ 6912 public boolean getKeepScreenOn() { 6913 return (mViewFlags & KEEP_SCREEN_ON) != 0; 6914 } 6915 6916 /** 6917 * Controls whether the screen should remain on, modifying the 6918 * value of {@link #KEEP_SCREEN_ON}. 6919 * 6920 * @param keepScreenOn Supply true to set {@link #KEEP_SCREEN_ON}. 6921 * 6922 * @see #getKeepScreenOn() 6923 * 6924 * @attr ref android.R.styleable#View_keepScreenOn 6925 */ 6926 public void setKeepScreenOn(boolean keepScreenOn) { 6927 setFlags(keepScreenOn ? KEEP_SCREEN_ON : 0, KEEP_SCREEN_ON); 6928 } 6929 6930 /** 6931 * Gets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. 6932 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 6933 * 6934 * @attr ref android.R.styleable#View_nextFocusLeft 6935 */ 6936 public int getNextFocusLeftId() { 6937 return mNextFocusLeftId; 6938 } 6939 6940 /** 6941 * Sets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. 6942 * @param nextFocusLeftId The next focus ID, or {@link #NO_ID} if the framework should 6943 * decide automatically. 6944 * 6945 * @attr ref android.R.styleable#View_nextFocusLeft 6946 */ 6947 public void setNextFocusLeftId(int nextFocusLeftId) { 6948 mNextFocusLeftId = nextFocusLeftId; 6949 } 6950 6951 /** 6952 * Gets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. 6953 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 6954 * 6955 * @attr ref android.R.styleable#View_nextFocusRight 6956 */ 6957 public int getNextFocusRightId() { 6958 return mNextFocusRightId; 6959 } 6960 6961 /** 6962 * Sets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. 6963 * @param nextFocusRightId The next focus ID, or {@link #NO_ID} if the framework should 6964 * decide automatically. 6965 * 6966 * @attr ref android.R.styleable#View_nextFocusRight 6967 */ 6968 public void setNextFocusRightId(int nextFocusRightId) { 6969 mNextFocusRightId = nextFocusRightId; 6970 } 6971 6972 /** 6973 * Gets the id of the view to use when the next focus is {@link #FOCUS_UP}. 6974 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 6975 * 6976 * @attr ref android.R.styleable#View_nextFocusUp 6977 */ 6978 public int getNextFocusUpId() { 6979 return mNextFocusUpId; 6980 } 6981 6982 /** 6983 * Sets the id of the view to use when the next focus is {@link #FOCUS_UP}. 6984 * @param nextFocusUpId The next focus ID, or {@link #NO_ID} if the framework should 6985 * decide automatically. 6986 * 6987 * @attr ref android.R.styleable#View_nextFocusUp 6988 */ 6989 public void setNextFocusUpId(int nextFocusUpId) { 6990 mNextFocusUpId = nextFocusUpId; 6991 } 6992 6993 /** 6994 * Gets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. 6995 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 6996 * 6997 * @attr ref android.R.styleable#View_nextFocusDown 6998 */ 6999 public int getNextFocusDownId() { 7000 return mNextFocusDownId; 7001 } 7002 7003 /** 7004 * Sets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. 7005 * @param nextFocusDownId The next focus ID, or {@link #NO_ID} if the framework should 7006 * decide automatically. 7007 * 7008 * @attr ref android.R.styleable#View_nextFocusDown 7009 */ 7010 public void setNextFocusDownId(int nextFocusDownId) { 7011 mNextFocusDownId = nextFocusDownId; 7012 } 7013 7014 /** 7015 * Gets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. 7016 * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. 7017 * 7018 * @attr ref android.R.styleable#View_nextFocusForward 7019 */ 7020 public int getNextFocusForwardId() { 7021 return mNextFocusForwardId; 7022 } 7023 7024 /** 7025 * Sets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. 7026 * @param nextFocusForwardId The next focus ID, or {@link #NO_ID} if the framework should 7027 * decide automatically. 7028 * 7029 * @attr ref android.R.styleable#View_nextFocusForward 7030 */ 7031 public void setNextFocusForwardId(int nextFocusForwardId) { 7032 mNextFocusForwardId = nextFocusForwardId; 7033 } 7034 7035 /** 7036 * Returns the visibility of this view and all of its ancestors 7037 * 7038 * @return True if this view and all of its ancestors are {@link #VISIBLE} 7039 */ 7040 public boolean isShown() { 7041 View current = this; 7042 //noinspection ConstantConditions 7043 do { 7044 if ((current.mViewFlags & VISIBILITY_MASK) != VISIBLE) { 7045 return false; 7046 } 7047 ViewParent parent = current.mParent; 7048 if (parent == null) { 7049 return false; // We are not attached to the view root 7050 } 7051 if (!(parent instanceof View)) { 7052 return true; 7053 } 7054 current = (View) parent; 7055 } while (current != null); 7056 7057 return false; 7058 } 7059 7060 /** 7061 * Called by the view hierarchy when the content insets for a window have 7062 * changed, to allow it to adjust its content to fit within those windows. 7063 * The content insets tell you the space that the status bar, input method, 7064 * and other system windows infringe on the application's window. 7065 * 7066 * <p>You do not normally need to deal with this function, since the default 7067 * window decoration given to applications takes care of applying it to the 7068 * content of the window. If you use {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} 7069 * or {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} this will not be the case, 7070 * and your content can be placed under those system elements. You can then 7071 * use this method within your view hierarchy if you have parts of your UI 7072 * which you would like to ensure are not being covered. 7073 * 7074 * <p>The default implementation of this method simply applies the content 7075 * insets to the view's padding, consuming that content (modifying the 7076 * insets to be 0), and returning true. This behavior is off by default, but can 7077 * be enabled through {@link #setFitsSystemWindows(boolean)}. 7078 * 7079 * <p>This function's traversal down the hierarchy is depth-first. The same content 7080 * insets object is propagated down the hierarchy, so any changes made to it will 7081 * be seen by all following views (including potentially ones above in 7082 * the hierarchy since this is a depth-first traversal). The first view 7083 * that returns true will abort the entire traversal. 7084 * 7085 * <p>The default implementation works well for a situation where it is 7086 * used with a container that covers the entire window, allowing it to 7087 * apply the appropriate insets to its content on all edges. If you need 7088 * a more complicated layout (such as two different views fitting system 7089 * windows, one on the top of the window, and one on the bottom), 7090 * you can override the method and handle the insets however you would like. 7091 * Note that the insets provided by the framework are always relative to the 7092 * far edges of the window, not accounting for the location of the called view 7093 * within that window. (In fact when this method is called you do not yet know 7094 * where the layout will place the view, as it is done before layout happens.) 7095 * 7096 * <p>Note: unlike many View methods, there is no dispatch phase to this 7097 * call. If you are overriding it in a ViewGroup and want to allow the 7098 * call to continue to your children, you must be sure to call the super 7099 * implementation. 7100 * 7101 * <p>Here is a sample layout that makes use of fitting system windows 7102 * to have controls for a video view placed inside of the window decorations 7103 * that it hides and shows. This can be used with code like the second 7104 * sample (video player) shown in {@link #setSystemUiVisibility(int)}. 7105 * 7106 * {@sample development/samples/ApiDemos/res/layout/video_player.xml complete} 7107 * 7108 * @param insets Current content insets of the window. Prior to 7109 * {@link android.os.Build.VERSION_CODES#JELLY_BEAN} you must not modify 7110 * the insets or else you and Android will be unhappy. 7111 * 7112 * @return {@code true} if this view applied the insets and it should not 7113 * continue propagating further down the hierarchy, {@code false} otherwise. 7114 * @see #getFitsSystemWindows() 7115 * @see #setFitsSystemWindows(boolean) 7116 * @see #setSystemUiVisibility(int) 7117 * 7118 * @deprecated As of API 20 use {@link #dispatchApplyWindowInsets(WindowInsets)} to apply 7119 * insets to views. Views should override {@link #onApplyWindowInsets(WindowInsets)} or use 7120 * {@link #setOnApplyWindowInsetsListener(android.view.View.OnApplyWindowInsetsListener)} 7121 * to implement handling their own insets. 7122 */ 7123 protected boolean fitSystemWindows(Rect insets) { 7124 if ((mPrivateFlags3 & PFLAG3_APPLYING_INSETS) == 0) { 7125 if (insets == null) { 7126 // Null insets by definition have already been consumed. 7127 // This call cannot apply insets since there are none to apply, 7128 // so return false. 7129 return false; 7130 } 7131 // If we're not in the process of dispatching the newer apply insets call, 7132 // that means we're not in the compatibility path. Dispatch into the newer 7133 // apply insets path and take things from there. 7134 try { 7135 mPrivateFlags3 |= PFLAG3_FITTING_SYSTEM_WINDOWS; 7136 return dispatchApplyWindowInsets(new WindowInsets(insets)).isConsumed(); 7137 } finally { 7138 mPrivateFlags3 &= ~PFLAG3_FITTING_SYSTEM_WINDOWS; 7139 } 7140 } else { 7141 // We're being called from the newer apply insets path. 7142 // Perform the standard fallback behavior. 7143 return fitSystemWindowsInt(insets); 7144 } 7145 } 7146 7147 private boolean fitSystemWindowsInt(Rect insets) { 7148 if ((mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS) { 7149 mUserPaddingStart = UNDEFINED_PADDING; 7150 mUserPaddingEnd = UNDEFINED_PADDING; 7151 Rect localInsets = sThreadLocal.get(); 7152 if (localInsets == null) { 7153 localInsets = new Rect(); 7154 sThreadLocal.set(localInsets); 7155 } 7156 boolean res = computeFitSystemWindows(insets, localInsets); 7157 mUserPaddingLeftInitial = localInsets.left; 7158 mUserPaddingRightInitial = localInsets.right; 7159 internalSetPadding(localInsets.left, localInsets.top, 7160 localInsets.right, localInsets.bottom); 7161 return res; 7162 } 7163 return false; 7164 } 7165 7166 /** 7167 * Called when the view should apply {@link WindowInsets} according to its internal policy. 7168 * 7169 * <p>This method should be overridden by views that wish to apply a policy different from or 7170 * in addition to the default behavior. Clients that wish to force a view subtree 7171 * to apply insets should call {@link #dispatchApplyWindowInsets(WindowInsets)}.</p> 7172 * 7173 * <p>Clients may supply an {@link OnApplyWindowInsetsListener} to a view. If one is set 7174 * it will be called during dispatch instead of this method. The listener may optionally 7175 * call this method from its own implementation if it wishes to apply the view's default 7176 * insets policy in addition to its own.</p> 7177 * 7178 * <p>Implementations of this method should either return the insets parameter unchanged 7179 * or a new {@link WindowInsets} cloned from the supplied insets with any insets consumed 7180 * that this view applied itself. This allows new inset types added in future platform 7181 * versions to pass through existing implementations unchanged without being erroneously 7182 * consumed.</p> 7183 * 7184 * <p>By default if a view's {@link #setFitsSystemWindows(boolean) fitsSystemWindows} 7185 * property is set then the view will consume the system window insets and apply them 7186 * as padding for the view.</p> 7187 * 7188 * @param insets Insets to apply 7189 * @return The supplied insets with any applied insets consumed 7190 */ 7191 public WindowInsets onApplyWindowInsets(WindowInsets insets) { 7192 if ((mPrivateFlags3 & PFLAG3_FITTING_SYSTEM_WINDOWS) == 0) { 7193 // We weren't called from within a direct call to fitSystemWindows, 7194 // call into it as a fallback in case we're in a class that overrides it 7195 // and has logic to perform. 7196 if (fitSystemWindows(insets.getSystemWindowInsets())) { 7197 return insets.consumeSystemWindowInsets(); 7198 } 7199 } else { 7200 // We were called from within a direct call to fitSystemWindows. 7201 if (fitSystemWindowsInt(insets.getSystemWindowInsets())) { 7202 return insets.consumeSystemWindowInsets(); 7203 } 7204 } 7205 return insets; 7206 } 7207 7208 /** 7209 * Set an {@link OnApplyWindowInsetsListener} to take over the policy for applying 7210 * window insets to this view. The listener's 7211 * {@link OnApplyWindowInsetsListener#onApplyWindowInsets(View, WindowInsets) onApplyWindowInsets} 7212 * method will be called instead of the view's 7213 * {@link #onApplyWindowInsets(WindowInsets) onApplyWindowInsets} method. 7214 * 7215 * @param listener Listener to set 7216 * 7217 * @see #onApplyWindowInsets(WindowInsets) 7218 */ 7219 public void setOnApplyWindowInsetsListener(OnApplyWindowInsetsListener listener) { 7220 getListenerInfo().mOnApplyWindowInsetsListener = listener; 7221 } 7222 7223 /** 7224 * Request to apply the given window insets to this view or another view in its subtree. 7225 * 7226 * <p>This method should be called by clients wishing to apply insets corresponding to areas 7227 * obscured by window decorations or overlays. This can include the status and navigation bars, 7228 * action bars, input methods and more. New inset categories may be added in the future. 7229 * The method returns the insets provided minus any that were applied by this view or its 7230 * children.</p> 7231 * 7232 * <p>Clients wishing to provide custom behavior should override the 7233 * {@link #onApplyWindowInsets(WindowInsets)} method or alternatively provide a 7234 * {@link OnApplyWindowInsetsListener} via the 7235 * {@link #setOnApplyWindowInsetsListener(View.OnApplyWindowInsetsListener) setOnApplyWindowInsetsListener} 7236 * method.</p> 7237 * 7238 * <p>This method replaces the older {@link #fitSystemWindows(Rect) fitSystemWindows} method. 7239 * </p> 7240 * 7241 * @param insets Insets to apply 7242 * @return The provided insets minus the insets that were consumed 7243 */ 7244 public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) { 7245 try { 7246 mPrivateFlags3 |= PFLAG3_APPLYING_INSETS; 7247 if (mListenerInfo != null && mListenerInfo.mOnApplyWindowInsetsListener != null) { 7248 return mListenerInfo.mOnApplyWindowInsetsListener.onApplyWindowInsets(this, insets); 7249 } else { 7250 return onApplyWindowInsets(insets); 7251 } 7252 } finally { 7253 mPrivateFlags3 &= ~PFLAG3_APPLYING_INSETS; 7254 } 7255 } 7256 7257 /** 7258 * Provide original WindowInsets that are dispatched to the view hierarchy. The insets are 7259 * only available if the view is attached. 7260 * 7261 * @return WindowInsets from the top of the view hierarchy or null if View is detached 7262 */ 7263 public WindowInsets getRootWindowInsets() { 7264 if (mAttachInfo != null) { 7265 return mAttachInfo.mViewRootImpl.getWindowInsets(false /* forceConstruct */); 7266 } 7267 return null; 7268 } 7269 7270 /** 7271 * @hide Compute the insets that should be consumed by this view and the ones 7272 * that should propagate to those under it. 7273 */ 7274 protected boolean computeFitSystemWindows(Rect inoutInsets, Rect outLocalInsets) { 7275 if ((mViewFlags & OPTIONAL_FITS_SYSTEM_WINDOWS) == 0 7276 || mAttachInfo == null 7277 || ((mAttachInfo.mSystemUiVisibility & SYSTEM_UI_LAYOUT_FLAGS) == 0 7278 && !mAttachInfo.mOverscanRequested)) { 7279 outLocalInsets.set(inoutInsets); 7280 inoutInsets.set(0, 0, 0, 0); 7281 return true; 7282 } else { 7283 // The application wants to take care of fitting system window for 7284 // the content... however we still need to take care of any overscan here. 7285 final Rect overscan = mAttachInfo.mOverscanInsets; 7286 outLocalInsets.set(overscan); 7287 inoutInsets.left -= overscan.left; 7288 inoutInsets.top -= overscan.top; 7289 inoutInsets.right -= overscan.right; 7290 inoutInsets.bottom -= overscan.bottom; 7291 return false; 7292 } 7293 } 7294 7295 /** 7296 * Compute insets that should be consumed by this view and the ones that should propagate 7297 * to those under it. 7298 * 7299 * @param in Insets currently being processed by this View, likely received as a parameter 7300 * to {@link #onApplyWindowInsets(WindowInsets)}. 7301 * @param outLocalInsets A Rect that will receive the insets that should be consumed 7302 * by this view 7303 * @return Insets that should be passed along to views under this one 7304 */ 7305 public WindowInsets computeSystemWindowInsets(WindowInsets in, Rect outLocalInsets) { 7306 if ((mViewFlags & OPTIONAL_FITS_SYSTEM_WINDOWS) == 0 7307 || mAttachInfo == null 7308 || (mAttachInfo.mSystemUiVisibility & SYSTEM_UI_LAYOUT_FLAGS) == 0) { 7309 outLocalInsets.set(in.getSystemWindowInsets()); 7310 return in.consumeSystemWindowInsets(); 7311 } else { 7312 outLocalInsets.set(0, 0, 0, 0); 7313 return in; 7314 } 7315 } 7316 7317 /** 7318 * Sets whether or not this view should account for system screen decorations 7319 * such as the status bar and inset its content; that is, controlling whether 7320 * the default implementation of {@link #fitSystemWindows(Rect)} will be 7321 * executed. See that method for more details. 7322 * 7323 * <p>Note that if you are providing your own implementation of 7324 * {@link #fitSystemWindows(Rect)}, then there is no need to set this 7325 * flag to true -- your implementation will be overriding the default 7326 * implementation that checks this flag. 7327 * 7328 * @param fitSystemWindows If true, then the default implementation of 7329 * {@link #fitSystemWindows(Rect)} will be executed. 7330 * 7331 * @attr ref android.R.styleable#View_fitsSystemWindows 7332 * @see #getFitsSystemWindows() 7333 * @see #fitSystemWindows(Rect) 7334 * @see #setSystemUiVisibility(int) 7335 */ 7336 public void setFitsSystemWindows(boolean fitSystemWindows) { 7337 setFlags(fitSystemWindows ? FITS_SYSTEM_WINDOWS : 0, FITS_SYSTEM_WINDOWS); 7338 } 7339 7340 /** 7341 * Check for state of {@link #setFitsSystemWindows(boolean)}. If this method 7342 * returns {@code true}, the default implementation of {@link #fitSystemWindows(Rect)} 7343 * will be executed. 7344 * 7345 * @return {@code true} if the default implementation of 7346 * {@link #fitSystemWindows(Rect)} will be executed. 7347 * 7348 * @attr ref android.R.styleable#View_fitsSystemWindows 7349 * @see #setFitsSystemWindows(boolean) 7350 * @see #fitSystemWindows(Rect) 7351 * @see #setSystemUiVisibility(int) 7352 */ 7353 @ViewDebug.ExportedProperty 7354 public boolean getFitsSystemWindows() { 7355 return (mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS; 7356 } 7357 7358 /** @hide */ 7359 public boolean fitsSystemWindows() { 7360 return getFitsSystemWindows(); 7361 } 7362 7363 /** 7364 * Ask that a new dispatch of {@link #fitSystemWindows(Rect)} be performed. 7365 * @deprecated Use {@link #requestApplyInsets()} for newer platform versions. 7366 */ 7367 public void requestFitSystemWindows() { 7368 if (mParent != null) { 7369 mParent.requestFitSystemWindows(); 7370 } 7371 } 7372 7373 /** 7374 * Ask that a new dispatch of {@link #onApplyWindowInsets(WindowInsets)} be performed. 7375 */ 7376 public void requestApplyInsets() { 7377 requestFitSystemWindows(); 7378 } 7379 7380 /** 7381 * For use by PhoneWindow to make its own system window fitting optional. 7382 * @hide 7383 */ 7384 public void makeOptionalFitsSystemWindows() { 7385 setFlags(OPTIONAL_FITS_SYSTEM_WINDOWS, OPTIONAL_FITS_SYSTEM_WINDOWS); 7386 } 7387 7388 /** 7389 * Returns the outsets, which areas of the device that aren't a surface, but we would like to 7390 * treat them as such. 7391 * @hide 7392 */ 7393 public void getOutsets(Rect outOutsetRect) { 7394 if (mAttachInfo != null) { 7395 outOutsetRect.set(mAttachInfo.mOutsets); 7396 } else { 7397 outOutsetRect.setEmpty(); 7398 } 7399 } 7400 7401 /** 7402 * Returns the visibility status for this view. 7403 * 7404 * @return One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. 7405 * @attr ref android.R.styleable#View_visibility 7406 */ 7407 @ViewDebug.ExportedProperty(mapping = { 7408 @ViewDebug.IntToString(from = VISIBLE, to = "VISIBLE"), 7409 @ViewDebug.IntToString(from = INVISIBLE, to = "INVISIBLE"), 7410 @ViewDebug.IntToString(from = GONE, to = "GONE") 7411 }) 7412 @Visibility 7413 public int getVisibility() { 7414 return mViewFlags & VISIBILITY_MASK; 7415 } 7416 7417 /** 7418 * Set the enabled state of this view. 7419 * 7420 * @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. 7421 * @attr ref android.R.styleable#View_visibility 7422 */ 7423 @RemotableViewMethod 7424 public void setVisibility(@Visibility int visibility) { 7425 setFlags(visibility, VISIBILITY_MASK); 7426 } 7427 7428 /** 7429 * Returns the enabled status for this view. The interpretation of the 7430 * enabled state varies by subclass. 7431 * 7432 * @return True if this view is enabled, false otherwise. 7433 */ 7434 @ViewDebug.ExportedProperty 7435 public boolean isEnabled() { 7436 return (mViewFlags & ENABLED_MASK) == ENABLED; 7437 } 7438 7439 /** 7440 * Set the enabled state of this view. The interpretation of the enabled 7441 * state varies by subclass. 7442 * 7443 * @param enabled True if this view is enabled, false otherwise. 7444 */ 7445 @RemotableViewMethod 7446 public void setEnabled(boolean enabled) { 7447 if (enabled == isEnabled()) return; 7448 7449 setFlags(enabled ? ENABLED : DISABLED, ENABLED_MASK); 7450 7451 /* 7452 * The View most likely has to change its appearance, so refresh 7453 * the drawable state. 7454 */ 7455 refreshDrawableState(); 7456 7457 // Invalidate too, since the default behavior for views is to be 7458 // be drawn at 50% alpha rather than to change the drawable. 7459 invalidate(true); 7460 7461 if (!enabled) { 7462 cancelPendingInputEvents(); 7463 } 7464 } 7465 7466 /** 7467 * Set whether this view can receive the focus. 7468 * 7469 * Setting this to false will also ensure that this view is not focusable 7470 * in touch mode. 7471 * 7472 * @param focusable If true, this view can receive the focus. 7473 * 7474 * @see #setFocusableInTouchMode(boolean) 7475 * @attr ref android.R.styleable#View_focusable 7476 */ 7477 public void setFocusable(boolean focusable) { 7478 if (!focusable) { 7479 setFlags(0, FOCUSABLE_IN_TOUCH_MODE); 7480 } 7481 setFlags(focusable ? FOCUSABLE : NOT_FOCUSABLE, FOCUSABLE_MASK); 7482 } 7483 7484 /** 7485 * Set whether this view can receive focus while in touch mode. 7486 * 7487 * Setting this to true will also ensure that this view is focusable. 7488 * 7489 * @param focusableInTouchMode If true, this view can receive the focus while 7490 * in touch mode. 7491 * 7492 * @see #setFocusable(boolean) 7493 * @attr ref android.R.styleable#View_focusableInTouchMode 7494 */ 7495 public void setFocusableInTouchMode(boolean focusableInTouchMode) { 7496 // Focusable in touch mode should always be set before the focusable flag 7497 // otherwise, setting the focusable flag will trigger a focusableViewAvailable() 7498 // which, in touch mode, will not successfully request focus on this view 7499 // because the focusable in touch mode flag is not set 7500 setFlags(focusableInTouchMode ? FOCUSABLE_IN_TOUCH_MODE : 0, FOCUSABLE_IN_TOUCH_MODE); 7501 if (focusableInTouchMode) { 7502 setFlags(FOCUSABLE, FOCUSABLE_MASK); 7503 } 7504 } 7505 7506 /** 7507 * Set whether this view should have sound effects enabled for events such as 7508 * clicking and touching. 7509 * 7510 * <p>You may wish to disable sound effects for a view if you already play sounds, 7511 * for instance, a dial key that plays dtmf tones. 7512 * 7513 * @param soundEffectsEnabled whether sound effects are enabled for this view. 7514 * @see #isSoundEffectsEnabled() 7515 * @see #playSoundEffect(int) 7516 * @attr ref android.R.styleable#View_soundEffectsEnabled 7517 */ 7518 public void setSoundEffectsEnabled(boolean soundEffectsEnabled) { 7519 setFlags(soundEffectsEnabled ? SOUND_EFFECTS_ENABLED: 0, SOUND_EFFECTS_ENABLED); 7520 } 7521 7522 /** 7523 * @return whether this view should have sound effects enabled for events such as 7524 * clicking and touching. 7525 * 7526 * @see #setSoundEffectsEnabled(boolean) 7527 * @see #playSoundEffect(int) 7528 * @attr ref android.R.styleable#View_soundEffectsEnabled 7529 */ 7530 @ViewDebug.ExportedProperty 7531 public boolean isSoundEffectsEnabled() { 7532 return SOUND_EFFECTS_ENABLED == (mViewFlags & SOUND_EFFECTS_ENABLED); 7533 } 7534 7535 /** 7536 * Set whether this view should have haptic feedback for events such as 7537 * long presses. 7538 * 7539 * <p>You may wish to disable haptic feedback if your view already controls 7540 * its own haptic feedback. 7541 * 7542 * @param hapticFeedbackEnabled whether haptic feedback enabled for this view. 7543 * @see #isHapticFeedbackEnabled() 7544 * @see #performHapticFeedback(int) 7545 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 7546 */ 7547 public void setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) { 7548 setFlags(hapticFeedbackEnabled ? HAPTIC_FEEDBACK_ENABLED: 0, HAPTIC_FEEDBACK_ENABLED); 7549 } 7550 7551 /** 7552 * @return whether this view should have haptic feedback enabled for events 7553 * long presses. 7554 * 7555 * @see #setHapticFeedbackEnabled(boolean) 7556 * @see #performHapticFeedback(int) 7557 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 7558 */ 7559 @ViewDebug.ExportedProperty 7560 public boolean isHapticFeedbackEnabled() { 7561 return HAPTIC_FEEDBACK_ENABLED == (mViewFlags & HAPTIC_FEEDBACK_ENABLED); 7562 } 7563 7564 /** 7565 * Returns the layout direction for this view. 7566 * 7567 * @return One of {@link #LAYOUT_DIRECTION_LTR}, 7568 * {@link #LAYOUT_DIRECTION_RTL}, 7569 * {@link #LAYOUT_DIRECTION_INHERIT} or 7570 * {@link #LAYOUT_DIRECTION_LOCALE}. 7571 * 7572 * @attr ref android.R.styleable#View_layoutDirection 7573 * 7574 * @hide 7575 */ 7576 @ViewDebug.ExportedProperty(category = "layout", mapping = { 7577 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "LTR"), 7578 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RTL"), 7579 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_INHERIT, to = "INHERIT"), 7580 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LOCALE, to = "LOCALE") 7581 }) 7582 @LayoutDir 7583 public int getRawLayoutDirection() { 7584 return (mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_MASK) >> PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 7585 } 7586 7587 /** 7588 * Set the layout direction for this view. This will propagate a reset of layout direction 7589 * resolution to the view's children and resolve layout direction for this view. 7590 * 7591 * @param layoutDirection the layout direction to set. Should be one of: 7592 * 7593 * {@link #LAYOUT_DIRECTION_LTR}, 7594 * {@link #LAYOUT_DIRECTION_RTL}, 7595 * {@link #LAYOUT_DIRECTION_INHERIT}, 7596 * {@link #LAYOUT_DIRECTION_LOCALE}. 7597 * 7598 * Resolution will be done if the value is set to LAYOUT_DIRECTION_INHERIT. The resolution 7599 * proceeds up the parent chain of the view to get the value. If there is no parent, then it 7600 * will return the default {@link #LAYOUT_DIRECTION_LTR}. 7601 * 7602 * @attr ref android.R.styleable#View_layoutDirection 7603 */ 7604 @RemotableViewMethod 7605 public void setLayoutDirection(@LayoutDir int layoutDirection) { 7606 if (getRawLayoutDirection() != layoutDirection) { 7607 // Reset the current layout direction and the resolved one 7608 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_MASK; 7609 resetRtlProperties(); 7610 // Set the new layout direction (filtered) 7611 mPrivateFlags2 |= 7612 ((layoutDirection << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) & PFLAG2_LAYOUT_DIRECTION_MASK); 7613 // We need to resolve all RTL properties as they all depend on layout direction 7614 resolveRtlPropertiesIfNeeded(); 7615 requestLayout(); 7616 invalidate(true); 7617 } 7618 } 7619 7620 /** 7621 * Returns the resolved layout direction for this view. 7622 * 7623 * @return {@link #LAYOUT_DIRECTION_RTL} if the layout direction is RTL or returns 7624 * {@link #LAYOUT_DIRECTION_LTR} if the layout direction is not RTL. 7625 * 7626 * For compatibility, this will return {@link #LAYOUT_DIRECTION_LTR} if API version 7627 * is lower than {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1}. 7628 * 7629 * @attr ref android.R.styleable#View_layoutDirection 7630 */ 7631 @ViewDebug.ExportedProperty(category = "layout", mapping = { 7632 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "RESOLVED_DIRECTION_LTR"), 7633 @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RESOLVED_DIRECTION_RTL") 7634 }) 7635 @ResolvedLayoutDir 7636 public int getLayoutDirection() { 7637 final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; 7638 if (targetSdkVersion < JELLY_BEAN_MR1) { 7639 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED; 7640 return LAYOUT_DIRECTION_RESOLVED_DEFAULT; 7641 } 7642 return ((mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL) == 7643 PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL) ? LAYOUT_DIRECTION_RTL : LAYOUT_DIRECTION_LTR; 7644 } 7645 7646 /** 7647 * Indicates whether or not this view's layout is right-to-left. This is resolved from 7648 * layout attribute and/or the inherited value from the parent 7649 * 7650 * @return true if the layout is right-to-left. 7651 * 7652 * @hide 7653 */ 7654 @ViewDebug.ExportedProperty(category = "layout") 7655 public boolean isLayoutRtl() { 7656 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL); 7657 } 7658 7659 /** 7660 * Indicates whether the view is currently tracking transient state that the 7661 * app should not need to concern itself with saving and restoring, but that 7662 * the framework should take special note to preserve when possible. 7663 * 7664 * <p>A view with transient state cannot be trivially rebound from an external 7665 * data source, such as an adapter binding item views in a list. This may be 7666 * because the view is performing an animation, tracking user selection 7667 * of content, or similar.</p> 7668 * 7669 * @return true if the view has transient state 7670 */ 7671 @ViewDebug.ExportedProperty(category = "layout") 7672 public boolean hasTransientState() { 7673 return (mPrivateFlags2 & PFLAG2_HAS_TRANSIENT_STATE) == PFLAG2_HAS_TRANSIENT_STATE; 7674 } 7675 7676 /** 7677 * Set whether this view is currently tracking transient state that the 7678 * framework should attempt to preserve when possible. This flag is reference counted, 7679 * so every call to setHasTransientState(true) should be paired with a later call 7680 * to setHasTransientState(false). 7681 * 7682 * <p>A view with transient state cannot be trivially rebound from an external 7683 * data source, such as an adapter binding item views in a list. This may be 7684 * because the view is performing an animation, tracking user selection 7685 * of content, or similar.</p> 7686 * 7687 * @param hasTransientState true if this view has transient state 7688 */ 7689 public void setHasTransientState(boolean hasTransientState) { 7690 mTransientStateCount = hasTransientState ? mTransientStateCount + 1 : 7691 mTransientStateCount - 1; 7692 if (mTransientStateCount < 0) { 7693 mTransientStateCount = 0; 7694 Log.e(VIEW_LOG_TAG, "hasTransientState decremented below 0: " + 7695 "unmatched pair of setHasTransientState calls"); 7696 } else if ((hasTransientState && mTransientStateCount == 1) || 7697 (!hasTransientState && mTransientStateCount == 0)) { 7698 // update flag if we've just incremented up from 0 or decremented down to 0 7699 mPrivateFlags2 = (mPrivateFlags2 & ~PFLAG2_HAS_TRANSIENT_STATE) | 7700 (hasTransientState ? PFLAG2_HAS_TRANSIENT_STATE : 0); 7701 if (mParent != null) { 7702 try { 7703 mParent.childHasTransientStateChanged(this, hasTransientState); 7704 } catch (AbstractMethodError e) { 7705 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 7706 " does not fully implement ViewParent", e); 7707 } 7708 } 7709 } 7710 } 7711 7712 /** 7713 * Returns true if this view is currently attached to a window. 7714 */ 7715 public boolean isAttachedToWindow() { 7716 return mAttachInfo != null; 7717 } 7718 7719 /** 7720 * Returns true if this view has been through at least one layout since it 7721 * was last attached to or detached from a window. 7722 */ 7723 public boolean isLaidOut() { 7724 return (mPrivateFlags3 & PFLAG3_IS_LAID_OUT) == PFLAG3_IS_LAID_OUT; 7725 } 7726 7727 /** 7728 * If this view doesn't do any drawing on its own, set this flag to 7729 * allow further optimizations. By default, this flag is not set on 7730 * View, but could be set on some View subclasses such as ViewGroup. 7731 * 7732 * Typically, if you override {@link #onDraw(android.graphics.Canvas)} 7733 * you should clear this flag. 7734 * 7735 * @param willNotDraw whether or not this View draw on its own 7736 */ 7737 public void setWillNotDraw(boolean willNotDraw) { 7738 setFlags(willNotDraw ? WILL_NOT_DRAW : 0, DRAW_MASK); 7739 } 7740 7741 /** 7742 * Returns whether or not this View draws on its own. 7743 * 7744 * @return true if this view has nothing to draw, false otherwise 7745 */ 7746 @ViewDebug.ExportedProperty(category = "drawing") 7747 public boolean willNotDraw() { 7748 return (mViewFlags & DRAW_MASK) == WILL_NOT_DRAW; 7749 } 7750 7751 /** 7752 * When a View's drawing cache is enabled, drawing is redirected to an 7753 * offscreen bitmap. Some views, like an ImageView, must be able to 7754 * bypass this mechanism if they already draw a single bitmap, to avoid 7755 * unnecessary usage of the memory. 7756 * 7757 * @param willNotCacheDrawing true if this view does not cache its 7758 * drawing, false otherwise 7759 */ 7760 public void setWillNotCacheDrawing(boolean willNotCacheDrawing) { 7761 setFlags(willNotCacheDrawing ? WILL_NOT_CACHE_DRAWING : 0, WILL_NOT_CACHE_DRAWING); 7762 } 7763 7764 /** 7765 * Returns whether or not this View can cache its drawing or not. 7766 * 7767 * @return true if this view does not cache its drawing, false otherwise 7768 */ 7769 @ViewDebug.ExportedProperty(category = "drawing") 7770 public boolean willNotCacheDrawing() { 7771 return (mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING; 7772 } 7773 7774 /** 7775 * Indicates whether this view reacts to click events or not. 7776 * 7777 * @return true if the view is clickable, false otherwise 7778 * 7779 * @see #setClickable(boolean) 7780 * @attr ref android.R.styleable#View_clickable 7781 */ 7782 @ViewDebug.ExportedProperty 7783 public boolean isClickable() { 7784 return (mViewFlags & CLICKABLE) == CLICKABLE; 7785 } 7786 7787 /** 7788 * Enables or disables click events for this view. When a view 7789 * is clickable it will change its state to "pressed" on every click. 7790 * Subclasses should set the view clickable to visually react to 7791 * user's clicks. 7792 * 7793 * @param clickable true to make the view clickable, false otherwise 7794 * 7795 * @see #isClickable() 7796 * @attr ref android.R.styleable#View_clickable 7797 */ 7798 public void setClickable(boolean clickable) { 7799 setFlags(clickable ? CLICKABLE : 0, CLICKABLE); 7800 } 7801 7802 /** 7803 * Indicates whether this view reacts to long click events or not. 7804 * 7805 * @return true if the view is long clickable, false otherwise 7806 * 7807 * @see #setLongClickable(boolean) 7808 * @attr ref android.R.styleable#View_longClickable 7809 */ 7810 public boolean isLongClickable() { 7811 return (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; 7812 } 7813 7814 /** 7815 * Enables or disables long click events for this view. When a view is long 7816 * clickable it reacts to the user holding down the button for a longer 7817 * duration than a tap. This event can either launch the listener or a 7818 * context menu. 7819 * 7820 * @param longClickable true to make the view long clickable, false otherwise 7821 * @see #isLongClickable() 7822 * @attr ref android.R.styleable#View_longClickable 7823 */ 7824 public void setLongClickable(boolean longClickable) { 7825 setFlags(longClickable ? LONG_CLICKABLE : 0, LONG_CLICKABLE); 7826 } 7827 7828 /** 7829 * Indicates whether this view reacts to context clicks or not. 7830 * 7831 * @return true if the view is context clickable, false otherwise 7832 * @see #setContextClickable(boolean) 7833 * @attr ref android.R.styleable#View_contextClickable 7834 */ 7835 public boolean isContextClickable() { 7836 return (mViewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE; 7837 } 7838 7839 /** 7840 * Enables or disables context clicking for this view. This event can launch the listener. 7841 * 7842 * @param contextClickable true to make the view react to a context click, false otherwise 7843 * @see #isContextClickable() 7844 * @attr ref android.R.styleable#View_contextClickable 7845 */ 7846 public void setContextClickable(boolean contextClickable) { 7847 setFlags(contextClickable ? CONTEXT_CLICKABLE : 0, CONTEXT_CLICKABLE); 7848 } 7849 7850 /** 7851 * Sets the pressed state for this view and provides a touch coordinate for 7852 * animation hinting. 7853 * 7854 * @param pressed Pass true to set the View's internal state to "pressed", 7855 * or false to reverts the View's internal state from a 7856 * previously set "pressed" state. 7857 * @param x The x coordinate of the touch that caused the press 7858 * @param y The y coordinate of the touch that caused the press 7859 */ 7860 private void setPressed(boolean pressed, float x, float y) { 7861 if (pressed) { 7862 drawableHotspotChanged(x, y); 7863 } 7864 7865 setPressed(pressed); 7866 } 7867 7868 /** 7869 * Sets the pressed state for this view. 7870 * 7871 * @see #isClickable() 7872 * @see #setClickable(boolean) 7873 * 7874 * @param pressed Pass true to set the View's internal state to "pressed", or false to reverts 7875 * the View's internal state from a previously set "pressed" state. 7876 */ 7877 public void setPressed(boolean pressed) { 7878 final boolean needsRefresh = pressed != ((mPrivateFlags & PFLAG_PRESSED) == PFLAG_PRESSED); 7879 7880 if (pressed) { 7881 mPrivateFlags |= PFLAG_PRESSED; 7882 } else { 7883 mPrivateFlags &= ~PFLAG_PRESSED; 7884 } 7885 7886 if (needsRefresh) { 7887 refreshDrawableState(); 7888 } 7889 dispatchSetPressed(pressed); 7890 } 7891 7892 /** 7893 * Dispatch setPressed to all of this View's children. 7894 * 7895 * @see #setPressed(boolean) 7896 * 7897 * @param pressed The new pressed state 7898 */ 7899 protected void dispatchSetPressed(boolean pressed) { 7900 } 7901 7902 /** 7903 * Indicates whether the view is currently in pressed state. Unless 7904 * {@link #setPressed(boolean)} is explicitly called, only clickable views can enter 7905 * the pressed state. 7906 * 7907 * @see #setPressed(boolean) 7908 * @see #isClickable() 7909 * @see #setClickable(boolean) 7910 * 7911 * @return true if the view is currently pressed, false otherwise 7912 */ 7913 @ViewDebug.ExportedProperty 7914 public boolean isPressed() { 7915 return (mPrivateFlags & PFLAG_PRESSED) == PFLAG_PRESSED; 7916 } 7917 7918 /** 7919 * @hide 7920 * Indicates whether this view will participate in data collection through 7921 * {@link ViewStructure}. If true, it will not provide any data 7922 * for itself or its children. If false, the normal data collection will be allowed. 7923 * 7924 * @return Returns false if assist data collection is not blocked, else true. 7925 * 7926 * @see #setAssistBlocked(boolean) 7927 * @attr ref android.R.styleable#View_assistBlocked 7928 */ 7929 public boolean isAssistBlocked() { 7930 return (mPrivateFlags3 & PFLAG3_ASSIST_BLOCKED) != 0; 7931 } 7932 7933 /** 7934 * @hide 7935 * Controls whether assist data collection from this view and its children is enabled 7936 * (that is, whether {@link #onProvideStructure} and 7937 * {@link #onProvideVirtualStructure} will be called). The default value is false, 7938 * allowing normal assist collection. Setting this to false will disable assist collection. 7939 * 7940 * @param enabled Set to true to <em>disable</em> assist data collection, or false 7941 * (the default) to allow it. 7942 * 7943 * @see #isAssistBlocked() 7944 * @see #onProvideStructure 7945 * @see #onProvideVirtualStructure 7946 * @attr ref android.R.styleable#View_assistBlocked 7947 */ 7948 public void setAssistBlocked(boolean enabled) { 7949 if (enabled) { 7950 mPrivateFlags3 |= PFLAG3_ASSIST_BLOCKED; 7951 } else { 7952 mPrivateFlags3 &= ~PFLAG3_ASSIST_BLOCKED; 7953 } 7954 } 7955 7956 /** 7957 * Indicates whether this view will save its state (that is, 7958 * whether its {@link #onSaveInstanceState} method will be called). 7959 * 7960 * @return Returns true if the view state saving is enabled, else false. 7961 * 7962 * @see #setSaveEnabled(boolean) 7963 * @attr ref android.R.styleable#View_saveEnabled 7964 */ 7965 public boolean isSaveEnabled() { 7966 return (mViewFlags & SAVE_DISABLED_MASK) != SAVE_DISABLED; 7967 } 7968 7969 /** 7970 * Controls whether the saving of this view's state is 7971 * enabled (that is, whether its {@link #onSaveInstanceState} method 7972 * will be called). Note that even if freezing is enabled, the 7973 * view still must have an id assigned to it (via {@link #setId(int)}) 7974 * for its state to be saved. This flag can only disable the 7975 * saving of this view; any child views may still have their state saved. 7976 * 7977 * @param enabled Set to false to <em>disable</em> state saving, or true 7978 * (the default) to allow it. 7979 * 7980 * @see #isSaveEnabled() 7981 * @see #setId(int) 7982 * @see #onSaveInstanceState() 7983 * @attr ref android.R.styleable#View_saveEnabled 7984 */ 7985 public void setSaveEnabled(boolean enabled) { 7986 setFlags(enabled ? 0 : SAVE_DISABLED, SAVE_DISABLED_MASK); 7987 } 7988 7989 /** 7990 * Gets whether the framework should discard touches when the view's 7991 * window is obscured by another visible window. 7992 * Refer to the {@link View} security documentation for more details. 7993 * 7994 * @return True if touch filtering is enabled. 7995 * 7996 * @see #setFilterTouchesWhenObscured(boolean) 7997 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 7998 */ 7999 @ViewDebug.ExportedProperty 8000 public boolean getFilterTouchesWhenObscured() { 8001 return (mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0; 8002 } 8003 8004 /** 8005 * Sets whether the framework should discard touches when the view's 8006 * window is obscured by another visible window. 8007 * Refer to the {@link View} security documentation for more details. 8008 * 8009 * @param enabled True if touch filtering should be enabled. 8010 * 8011 * @see #getFilterTouchesWhenObscured 8012 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 8013 */ 8014 public void setFilterTouchesWhenObscured(boolean enabled) { 8015 setFlags(enabled ? FILTER_TOUCHES_WHEN_OBSCURED : 0, 8016 FILTER_TOUCHES_WHEN_OBSCURED); 8017 } 8018 8019 /** 8020 * Indicates whether the entire hierarchy under this view will save its 8021 * state when a state saving traversal occurs from its parent. The default 8022 * is true; if false, these views will not be saved unless 8023 * {@link #saveHierarchyState(SparseArray)} is called directly on this view. 8024 * 8025 * @return Returns true if the view state saving from parent is enabled, else false. 8026 * 8027 * @see #setSaveFromParentEnabled(boolean) 8028 */ 8029 public boolean isSaveFromParentEnabled() { 8030 return (mViewFlags & PARENT_SAVE_DISABLED_MASK) != PARENT_SAVE_DISABLED; 8031 } 8032 8033 /** 8034 * Controls whether the entire hierarchy under this view will save its 8035 * state when a state saving traversal occurs from its parent. The default 8036 * is true; if false, these views will not be saved unless 8037 * {@link #saveHierarchyState(SparseArray)} is called directly on this view. 8038 * 8039 * @param enabled Set to false to <em>disable</em> state saving, or true 8040 * (the default) to allow it. 8041 * 8042 * @see #isSaveFromParentEnabled() 8043 * @see #setId(int) 8044 * @see #onSaveInstanceState() 8045 */ 8046 public void setSaveFromParentEnabled(boolean enabled) { 8047 setFlags(enabled ? 0 : PARENT_SAVE_DISABLED, PARENT_SAVE_DISABLED_MASK); 8048 } 8049 8050 8051 /** 8052 * Returns whether this View is able to take focus. 8053 * 8054 * @return True if this view can take focus, or false otherwise. 8055 * @attr ref android.R.styleable#View_focusable 8056 */ 8057 @ViewDebug.ExportedProperty(category = "focus") 8058 public final boolean isFocusable() { 8059 return FOCUSABLE == (mViewFlags & FOCUSABLE_MASK); 8060 } 8061 8062 /** 8063 * When a view is focusable, it may not want to take focus when in touch mode. 8064 * For example, a button would like focus when the user is navigating via a D-pad 8065 * so that the user can click on it, but once the user starts touching the screen, 8066 * the button shouldn't take focus 8067 * @return Whether the view is focusable in touch mode. 8068 * @attr ref android.R.styleable#View_focusableInTouchMode 8069 */ 8070 @ViewDebug.ExportedProperty 8071 public final boolean isFocusableInTouchMode() { 8072 return FOCUSABLE_IN_TOUCH_MODE == (mViewFlags & FOCUSABLE_IN_TOUCH_MODE); 8073 } 8074 8075 /** 8076 * Find the nearest view in the specified direction that can take focus. 8077 * This does not actually give focus to that view. 8078 * 8079 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 8080 * 8081 * @return The nearest focusable in the specified direction, or null if none 8082 * can be found. 8083 */ 8084 public View focusSearch(@FocusRealDirection int direction) { 8085 if (mParent != null) { 8086 return mParent.focusSearch(this, direction); 8087 } else { 8088 return null; 8089 } 8090 } 8091 8092 /** 8093 * This method is the last chance for the focused view and its ancestors to 8094 * respond to an arrow key. This is called when the focused view did not 8095 * consume the key internally, nor could the view system find a new view in 8096 * the requested direction to give focus to. 8097 * 8098 * @param focused The currently focused view. 8099 * @param direction The direction focus wants to move. One of FOCUS_UP, 8100 * FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT. 8101 * @return True if the this view consumed this unhandled move. 8102 */ 8103 public boolean dispatchUnhandledMove(View focused, @FocusRealDirection int direction) { 8104 return false; 8105 } 8106 8107 /** 8108 * If a user manually specified the next view id for a particular direction, 8109 * use the root to look up the view. 8110 * @param root The root view of the hierarchy containing this view. 8111 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_FORWARD, 8112 * or FOCUS_BACKWARD. 8113 * @return The user specified next view, or null if there is none. 8114 */ 8115 View findUserSetNextFocus(View root, @FocusDirection int direction) { 8116 switch (direction) { 8117 case FOCUS_LEFT: 8118 if (mNextFocusLeftId == View.NO_ID) return null; 8119 return findViewInsideOutShouldExist(root, mNextFocusLeftId); 8120 case FOCUS_RIGHT: 8121 if (mNextFocusRightId == View.NO_ID) return null; 8122 return findViewInsideOutShouldExist(root, mNextFocusRightId); 8123 case FOCUS_UP: 8124 if (mNextFocusUpId == View.NO_ID) return null; 8125 return findViewInsideOutShouldExist(root, mNextFocusUpId); 8126 case FOCUS_DOWN: 8127 if (mNextFocusDownId == View.NO_ID) return null; 8128 return findViewInsideOutShouldExist(root, mNextFocusDownId); 8129 case FOCUS_FORWARD: 8130 if (mNextFocusForwardId == View.NO_ID) return null; 8131 return findViewInsideOutShouldExist(root, mNextFocusForwardId); 8132 case FOCUS_BACKWARD: { 8133 if (mID == View.NO_ID) return null; 8134 final int id = mID; 8135 return root.findViewByPredicateInsideOut(this, new Predicate<View>() { 8136 @Override 8137 public boolean apply(View t) { 8138 return t.mNextFocusForwardId == id; 8139 } 8140 }); 8141 } 8142 } 8143 return null; 8144 } 8145 8146 private View findViewInsideOutShouldExist(View root, int id) { 8147 if (mMatchIdPredicate == null) { 8148 mMatchIdPredicate = new MatchIdPredicate(); 8149 } 8150 mMatchIdPredicate.mId = id; 8151 View result = root.findViewByPredicateInsideOut(this, mMatchIdPredicate); 8152 if (result == null) { 8153 Log.w(VIEW_LOG_TAG, "couldn't find view with id " + id); 8154 } 8155 return result; 8156 } 8157 8158 /** 8159 * Find and return all focusable views that are descendants of this view, 8160 * possibly including this view if it is focusable itself. 8161 * 8162 * @param direction The direction of the focus 8163 * @return A list of focusable views 8164 */ 8165 public ArrayList<View> getFocusables(@FocusDirection int direction) { 8166 ArrayList<View> result = new ArrayList<View>(24); 8167 addFocusables(result, direction); 8168 return result; 8169 } 8170 8171 /** 8172 * Add any focusable views that are descendants of this view (possibly 8173 * including this view if it is focusable itself) to views. If we are in touch mode, 8174 * only add views that are also focusable in touch mode. 8175 * 8176 * @param views Focusable views found so far 8177 * @param direction The direction of the focus 8178 */ 8179 public void addFocusables(ArrayList<View> views, @FocusDirection int direction) { 8180 addFocusables(views, direction, FOCUSABLES_TOUCH_MODE); 8181 } 8182 8183 /** 8184 * Adds any focusable views that are descendants of this view (possibly 8185 * including this view if it is focusable itself) to views. This method 8186 * adds all focusable views regardless if we are in touch mode or 8187 * only views focusable in touch mode if we are in touch mode or 8188 * only views that can take accessibility focus if accessibility is enabled 8189 * depending on the focusable mode parameter. 8190 * 8191 * @param views Focusable views found so far or null if all we are interested is 8192 * the number of focusables. 8193 * @param direction The direction of the focus. 8194 * @param focusableMode The type of focusables to be added. 8195 * 8196 * @see #FOCUSABLES_ALL 8197 * @see #FOCUSABLES_TOUCH_MODE 8198 */ 8199 public void addFocusables(ArrayList<View> views, @FocusDirection int direction, 8200 @FocusableMode int focusableMode) { 8201 if (views == null) { 8202 return; 8203 } 8204 if (!isFocusable()) { 8205 return; 8206 } 8207 if ((focusableMode & FOCUSABLES_TOUCH_MODE) == FOCUSABLES_TOUCH_MODE 8208 && isInTouchMode() && !isFocusableInTouchMode()) { 8209 return; 8210 } 8211 views.add(this); 8212 } 8213 8214 /** 8215 * Finds the Views that contain given text. The containment is case insensitive. 8216 * The search is performed by either the text that the View renders or the content 8217 * description that describes the view for accessibility purposes and the view does 8218 * not render or both. Clients can specify how the search is to be performed via 8219 * passing the {@link #FIND_VIEWS_WITH_TEXT} and 8220 * {@link #FIND_VIEWS_WITH_CONTENT_DESCRIPTION} flags. 8221 * 8222 * @param outViews The output list of matching Views. 8223 * @param searched The text to match against. 8224 * 8225 * @see #FIND_VIEWS_WITH_TEXT 8226 * @see #FIND_VIEWS_WITH_CONTENT_DESCRIPTION 8227 * @see #setContentDescription(CharSequence) 8228 */ 8229 public void findViewsWithText(ArrayList<View> outViews, CharSequence searched, 8230 @FindViewFlags int flags) { 8231 if (getAccessibilityNodeProvider() != null) { 8232 if ((flags & FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS) != 0) { 8233 outViews.add(this); 8234 } 8235 } else if ((flags & FIND_VIEWS_WITH_CONTENT_DESCRIPTION) != 0 8236 && (searched != null && searched.length() > 0) 8237 && (mContentDescription != null && mContentDescription.length() > 0)) { 8238 String searchedLowerCase = searched.toString().toLowerCase(); 8239 String contentDescriptionLowerCase = mContentDescription.toString().toLowerCase(); 8240 if (contentDescriptionLowerCase.contains(searchedLowerCase)) { 8241 outViews.add(this); 8242 } 8243 } 8244 } 8245 8246 /** 8247 * Find and return all touchable views that are descendants of this view, 8248 * possibly including this view if it is touchable itself. 8249 * 8250 * @return A list of touchable views 8251 */ 8252 public ArrayList<View> getTouchables() { 8253 ArrayList<View> result = new ArrayList<View>(); 8254 addTouchables(result); 8255 return result; 8256 } 8257 8258 /** 8259 * Add any touchable views that are descendants of this view (possibly 8260 * including this view if it is touchable itself) to views. 8261 * 8262 * @param views Touchable views found so far 8263 */ 8264 public void addTouchables(ArrayList<View> views) { 8265 final int viewFlags = mViewFlags; 8266 8267 if (((viewFlags & CLICKABLE) == CLICKABLE || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE 8268 || (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE) 8269 && (viewFlags & ENABLED_MASK) == ENABLED) { 8270 views.add(this); 8271 } 8272 } 8273 8274 /** 8275 * Returns whether this View is accessibility focused. 8276 * 8277 * @return True if this View is accessibility focused. 8278 */ 8279 public boolean isAccessibilityFocused() { 8280 return (mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0; 8281 } 8282 8283 /** 8284 * Call this to try to give accessibility focus to this view. 8285 * 8286 * A view will not actually take focus if {@link AccessibilityManager#isEnabled()} 8287 * returns false or the view is no visible or the view already has accessibility 8288 * focus. 8289 * 8290 * See also {@link #focusSearch(int)}, which is what you call to say that you 8291 * have focus, and you want your parent to look for the next one. 8292 * 8293 * @return Whether this view actually took accessibility focus. 8294 * 8295 * @hide 8296 */ 8297 public boolean requestAccessibilityFocus() { 8298 AccessibilityManager manager = AccessibilityManager.getInstance(mContext); 8299 if (!manager.isEnabled() || !manager.isTouchExplorationEnabled()) { 8300 return false; 8301 } 8302 if ((mViewFlags & VISIBILITY_MASK) != VISIBLE) { 8303 return false; 8304 } 8305 if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) == 0) { 8306 mPrivateFlags2 |= PFLAG2_ACCESSIBILITY_FOCUSED; 8307 ViewRootImpl viewRootImpl = getViewRootImpl(); 8308 if (viewRootImpl != null) { 8309 viewRootImpl.setAccessibilityFocus(this, null); 8310 } 8311 invalidate(); 8312 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED); 8313 return true; 8314 } 8315 return false; 8316 } 8317 8318 /** 8319 * Call this to try to clear accessibility focus of this view. 8320 * 8321 * See also {@link #focusSearch(int)}, which is what you call to say that you 8322 * have focus, and you want your parent to look for the next one. 8323 * 8324 * @hide 8325 */ 8326 public void clearAccessibilityFocus() { 8327 clearAccessibilityFocusNoCallbacks(); 8328 // Clear the global reference of accessibility focus if this 8329 // view or any of its descendants had accessibility focus. 8330 ViewRootImpl viewRootImpl = getViewRootImpl(); 8331 if (viewRootImpl != null) { 8332 View focusHost = viewRootImpl.getAccessibilityFocusedHost(); 8333 if (focusHost != null && ViewRootImpl.isViewDescendantOf(focusHost, this)) { 8334 viewRootImpl.setAccessibilityFocus(null, null); 8335 } 8336 } 8337 } 8338 8339 private void sendAccessibilityHoverEvent(int eventType) { 8340 // Since we are not delivering to a client accessibility events from not 8341 // important views (unless the clinet request that) we need to fire the 8342 // event from the deepest view exposed to the client. As a consequence if 8343 // the user crosses a not exposed view the client will see enter and exit 8344 // of the exposed predecessor followed by and enter and exit of that same 8345 // predecessor when entering and exiting the not exposed descendant. This 8346 // is fine since the client has a clear idea which view is hovered at the 8347 // price of a couple more events being sent. This is a simple and 8348 // working solution. 8349 View source = this; 8350 while (true) { 8351 if (source.includeForAccessibility()) { 8352 source.sendAccessibilityEvent(eventType); 8353 return; 8354 } 8355 ViewParent parent = source.getParent(); 8356 if (parent instanceof View) { 8357 source = (View) parent; 8358 } else { 8359 return; 8360 } 8361 } 8362 } 8363 8364 /** 8365 * Clears accessibility focus without calling any callback methods 8366 * normally invoked in {@link #clearAccessibilityFocus()}. This method 8367 * is used for clearing accessibility focus when giving this focus to 8368 * another view. 8369 */ 8370 void clearAccessibilityFocusNoCallbacks() { 8371 if ((mPrivateFlags2 & PFLAG2_ACCESSIBILITY_FOCUSED) != 0) { 8372 mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_FOCUSED; 8373 invalidate(); 8374 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED); 8375 } 8376 } 8377 8378 /** 8379 * Call this to try to give focus to a specific view or to one of its 8380 * descendants. 8381 * 8382 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 8383 * false), or if it is focusable and it is not focusable in touch mode 8384 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 8385 * 8386 * See also {@link #focusSearch(int)}, which is what you call to say that you 8387 * have focus, and you want your parent to look for the next one. 8388 * 8389 * This is equivalent to calling {@link #requestFocus(int, Rect)} with arguments 8390 * {@link #FOCUS_DOWN} and <code>null</code>. 8391 * 8392 * @return Whether this view or one of its descendants actually took focus. 8393 */ 8394 public final boolean requestFocus() { 8395 return requestFocus(View.FOCUS_DOWN); 8396 } 8397 8398 /** 8399 * Call this to try to give focus to a specific view or to one of its 8400 * descendants and give it a hint about what direction focus is heading. 8401 * 8402 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 8403 * false), or if it is focusable and it is not focusable in touch mode 8404 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 8405 * 8406 * See also {@link #focusSearch(int)}, which is what you call to say that you 8407 * have focus, and you want your parent to look for the next one. 8408 * 8409 * This is equivalent to calling {@link #requestFocus(int, Rect)} with 8410 * <code>null</code> set for the previously focused rectangle. 8411 * 8412 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 8413 * @return Whether this view or one of its descendants actually took focus. 8414 */ 8415 public final boolean requestFocus(int direction) { 8416 return requestFocus(direction, null); 8417 } 8418 8419 /** 8420 * Call this to try to give focus to a specific view or to one of its descendants 8421 * and give it hints about the direction and a specific rectangle that the focus 8422 * is coming from. The rectangle can help give larger views a finer grained hint 8423 * about where focus is coming from, and therefore, where to show selection, or 8424 * forward focus change internally. 8425 * 8426 * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns 8427 * false), or if it is focusable and it is not focusable in touch mode 8428 * ({@link #isFocusableInTouchMode}) while the device is in touch mode. 8429 * 8430 * A View will not take focus if it is not visible. 8431 * 8432 * A View will not take focus if one of its parents has 8433 * {@link android.view.ViewGroup#getDescendantFocusability()} equal to 8434 * {@link ViewGroup#FOCUS_BLOCK_DESCENDANTS}. 8435 * 8436 * See also {@link #focusSearch(int)}, which is what you call to say that you 8437 * have focus, and you want your parent to look for the next one. 8438 * 8439 * You may wish to override this method if your custom {@link View} has an internal 8440 * {@link View} that it wishes to forward the request to. 8441 * 8442 * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT 8443 * @param previouslyFocusedRect The rectangle (in this View's coordinate system) 8444 * to give a finer grained hint about where focus is coming from. May be null 8445 * if there is no hint. 8446 * @return Whether this view or one of its descendants actually took focus. 8447 */ 8448 public boolean requestFocus(int direction, Rect previouslyFocusedRect) { 8449 return requestFocusNoSearch(direction, previouslyFocusedRect); 8450 } 8451 8452 private boolean requestFocusNoSearch(int direction, Rect previouslyFocusedRect) { 8453 // need to be focusable 8454 if ((mViewFlags & FOCUSABLE_MASK) != FOCUSABLE || 8455 (mViewFlags & VISIBILITY_MASK) != VISIBLE) { 8456 return false; 8457 } 8458 8459 // need to be focusable in touch mode if in touch mode 8460 if (isInTouchMode() && 8461 (FOCUSABLE_IN_TOUCH_MODE != (mViewFlags & FOCUSABLE_IN_TOUCH_MODE))) { 8462 return false; 8463 } 8464 8465 // need to not have any parents blocking us 8466 if (hasAncestorThatBlocksDescendantFocus()) { 8467 return false; 8468 } 8469 8470 handleFocusGainInternal(direction, previouslyFocusedRect); 8471 return true; 8472 } 8473 8474 /** 8475 * Call this to try to give focus to a specific view or to one of its descendants. This is a 8476 * special variant of {@link #requestFocus() } that will allow views that are not focusable in 8477 * touch mode to request focus when they are touched. 8478 * 8479 * @return Whether this view or one of its descendants actually took focus. 8480 * 8481 * @see #isInTouchMode() 8482 * 8483 */ 8484 public final boolean requestFocusFromTouch() { 8485 // Leave touch mode if we need to 8486 if (isInTouchMode()) { 8487 ViewRootImpl viewRoot = getViewRootImpl(); 8488 if (viewRoot != null) { 8489 viewRoot.ensureTouchMode(false); 8490 } 8491 } 8492 return requestFocus(View.FOCUS_DOWN); 8493 } 8494 8495 /** 8496 * @return Whether any ancestor of this view blocks descendant focus. 8497 */ 8498 private boolean hasAncestorThatBlocksDescendantFocus() { 8499 final boolean focusableInTouchMode = isFocusableInTouchMode(); 8500 ViewParent ancestor = mParent; 8501 while (ancestor instanceof ViewGroup) { 8502 final ViewGroup vgAncestor = (ViewGroup) ancestor; 8503 if (vgAncestor.getDescendantFocusability() == ViewGroup.FOCUS_BLOCK_DESCENDANTS 8504 || (!focusableInTouchMode && vgAncestor.shouldBlockFocusForTouchscreen())) { 8505 return true; 8506 } else { 8507 ancestor = vgAncestor.getParent(); 8508 } 8509 } 8510 return false; 8511 } 8512 8513 /** 8514 * Gets the mode for determining whether this View is important for accessibility 8515 * which is if it fires accessibility events and if it is reported to 8516 * accessibility services that query the screen. 8517 * 8518 * @return The mode for determining whether a View is important for accessibility. 8519 * 8520 * @attr ref android.R.styleable#View_importantForAccessibility 8521 * 8522 * @see #IMPORTANT_FOR_ACCESSIBILITY_YES 8523 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO 8524 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS 8525 * @see #IMPORTANT_FOR_ACCESSIBILITY_AUTO 8526 */ 8527 @ViewDebug.ExportedProperty(category = "accessibility", mapping = { 8528 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_AUTO, to = "auto"), 8529 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_YES, to = "yes"), 8530 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO, to = "no"), 8531 @ViewDebug.IntToString(from = IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS, 8532 to = "noHideDescendants") 8533 }) 8534 public int getImportantForAccessibility() { 8535 return (mPrivateFlags2 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK) 8536 >> PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 8537 } 8538 8539 /** 8540 * Sets the live region mode for this view. This indicates to accessibility 8541 * services whether they should automatically notify the user about changes 8542 * to the view's content description or text, or to the content descriptions 8543 * or text of the view's children (where applicable). 8544 * <p> 8545 * For example, in a login screen with a TextView that displays an "incorrect 8546 * password" notification, that view should be marked as a live region with 8547 * mode {@link #ACCESSIBILITY_LIVE_REGION_POLITE}. 8548 * <p> 8549 * To disable change notifications for this view, use 8550 * {@link #ACCESSIBILITY_LIVE_REGION_NONE}. This is the default live region 8551 * mode for most views. 8552 * <p> 8553 * To indicate that the user should be notified of changes, use 8554 * {@link #ACCESSIBILITY_LIVE_REGION_POLITE}. 8555 * <p> 8556 * If the view's changes should interrupt ongoing speech and notify the user 8557 * immediately, use {@link #ACCESSIBILITY_LIVE_REGION_ASSERTIVE}. 8558 * 8559 * @param mode The live region mode for this view, one of: 8560 * <ul> 8561 * <li>{@link #ACCESSIBILITY_LIVE_REGION_NONE} 8562 * <li>{@link #ACCESSIBILITY_LIVE_REGION_POLITE} 8563 * <li>{@link #ACCESSIBILITY_LIVE_REGION_ASSERTIVE} 8564 * </ul> 8565 * @attr ref android.R.styleable#View_accessibilityLiveRegion 8566 */ 8567 public void setAccessibilityLiveRegion(int mode) { 8568 if (mode != getAccessibilityLiveRegion()) { 8569 mPrivateFlags2 &= ~PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK; 8570 mPrivateFlags2 |= (mode << PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT) 8571 & PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK; 8572 notifyViewAccessibilityStateChangedIfNeeded( 8573 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 8574 } 8575 } 8576 8577 /** 8578 * Gets the live region mode for this View. 8579 * 8580 * @return The live region mode for the view. 8581 * 8582 * @attr ref android.R.styleable#View_accessibilityLiveRegion 8583 * 8584 * @see #setAccessibilityLiveRegion(int) 8585 */ 8586 public int getAccessibilityLiveRegion() { 8587 return (mPrivateFlags2 & PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK) 8588 >> PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT; 8589 } 8590 8591 /** 8592 * Sets how to determine whether this view is important for accessibility 8593 * which is if it fires accessibility events and if it is reported to 8594 * accessibility services that query the screen. 8595 * 8596 * @param mode How to determine whether this view is important for accessibility. 8597 * 8598 * @attr ref android.R.styleable#View_importantForAccessibility 8599 * 8600 * @see #IMPORTANT_FOR_ACCESSIBILITY_YES 8601 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO 8602 * @see #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS 8603 * @see #IMPORTANT_FOR_ACCESSIBILITY_AUTO 8604 */ 8605 public void setImportantForAccessibility(int mode) { 8606 final int oldMode = getImportantForAccessibility(); 8607 if (mode != oldMode) { 8608 // If we're moving between AUTO and another state, we might not need 8609 // to send a subtree changed notification. We'll store the computed 8610 // importance, since we'll need to check it later to make sure. 8611 final boolean maySkipNotify = oldMode == IMPORTANT_FOR_ACCESSIBILITY_AUTO 8612 || mode == IMPORTANT_FOR_ACCESSIBILITY_AUTO; 8613 final boolean oldIncludeForAccessibility = maySkipNotify && includeForAccessibility(); 8614 mPrivateFlags2 &= ~PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK; 8615 mPrivateFlags2 |= (mode << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT) 8616 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK; 8617 if (!maySkipNotify || oldIncludeForAccessibility != includeForAccessibility()) { 8618 notifySubtreeAccessibilityStateChangedIfNeeded(); 8619 } else { 8620 notifyViewAccessibilityStateChangedIfNeeded( 8621 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 8622 } 8623 } 8624 } 8625 8626 /** 8627 * Computes whether this view should be exposed for accessibility. In 8628 * general, views that are interactive or provide information are exposed 8629 * while views that serve only as containers are hidden. 8630 * <p> 8631 * If an ancestor of this view has importance 8632 * {@link #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS}, this method 8633 * returns <code>false</code>. 8634 * <p> 8635 * Otherwise, the value is computed according to the view's 8636 * {@link #getImportantForAccessibility()} value: 8637 * <ol> 8638 * <li>{@link #IMPORTANT_FOR_ACCESSIBILITY_NO} or 8639 * {@link #IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS}, return <code>false 8640 * </code> 8641 * <li>{@link #IMPORTANT_FOR_ACCESSIBILITY_YES}, return <code>true</code> 8642 * <li>{@link #IMPORTANT_FOR_ACCESSIBILITY_AUTO}, return <code>true</code> if 8643 * view satisfies any of the following: 8644 * <ul> 8645 * <li>Is actionable, e.g. {@link #isClickable()}, 8646 * {@link #isLongClickable()}, or {@link #isFocusable()} 8647 * <li>Has an {@link AccessibilityDelegate} 8648 * <li>Has an interaction listener, e.g. {@link OnTouchListener}, 8649 * {@link OnKeyListener}, etc. 8650 * <li>Is an accessibility live region, e.g. 8651 * {@link #getAccessibilityLiveRegion()} is not 8652 * {@link #ACCESSIBILITY_LIVE_REGION_NONE}. 8653 * </ul> 8654 * </ol> 8655 * 8656 * @return Whether the view is exposed for accessibility. 8657 * @see #setImportantForAccessibility(int) 8658 * @see #getImportantForAccessibility() 8659 */ 8660 public boolean isImportantForAccessibility() { 8661 final int mode = (mPrivateFlags2 & PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK) 8662 >> PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 8663 if (mode == IMPORTANT_FOR_ACCESSIBILITY_NO 8664 || mode == IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) { 8665 return false; 8666 } 8667 8668 // Check parent mode to ensure we're not hidden. 8669 ViewParent parent = mParent; 8670 while (parent instanceof View) { 8671 if (((View) parent).getImportantForAccessibility() 8672 == IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) { 8673 return false; 8674 } 8675 parent = parent.getParent(); 8676 } 8677 8678 return mode == IMPORTANT_FOR_ACCESSIBILITY_YES || isActionableForAccessibility() 8679 || hasListenersForAccessibility() || getAccessibilityNodeProvider() != null 8680 || getAccessibilityLiveRegion() != ACCESSIBILITY_LIVE_REGION_NONE; 8681 } 8682 8683 /** 8684 * Gets the parent for accessibility purposes. Note that the parent for 8685 * accessibility is not necessary the immediate parent. It is the first 8686 * predecessor that is important for accessibility. 8687 * 8688 * @return The parent for accessibility purposes. 8689 */ 8690 public ViewParent getParentForAccessibility() { 8691 if (mParent instanceof View) { 8692 View parentView = (View) mParent; 8693 if (parentView.includeForAccessibility()) { 8694 return mParent; 8695 } else { 8696 return mParent.getParentForAccessibility(); 8697 } 8698 } 8699 return null; 8700 } 8701 8702 /** 8703 * Adds the children of this View relevant for accessibility to the given list 8704 * as output. Since some Views are not important for accessibility the added 8705 * child views are not necessarily direct children of this view, rather they are 8706 * the first level of descendants important for accessibility. 8707 * 8708 * @param outChildren The output list that will receive children for accessibility. 8709 */ 8710 public void addChildrenForAccessibility(ArrayList<View> outChildren) { 8711 8712 } 8713 8714 /** 8715 * Whether to regard this view for accessibility. A view is regarded for 8716 * accessibility if it is important for accessibility or the querying 8717 * accessibility service has explicitly requested that view not 8718 * important for accessibility are regarded. 8719 * 8720 * @return Whether to regard the view for accessibility. 8721 * 8722 * @hide 8723 */ 8724 public boolean includeForAccessibility() { 8725 if (mAttachInfo != null) { 8726 return (mAttachInfo.mAccessibilityFetchFlags 8727 & AccessibilityNodeInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS) != 0 8728 || isImportantForAccessibility(); 8729 } 8730 return false; 8731 } 8732 8733 /** 8734 * Returns whether the View is considered actionable from 8735 * accessibility perspective. Such view are important for 8736 * accessibility. 8737 * 8738 * @return True if the view is actionable for accessibility. 8739 * 8740 * @hide 8741 */ 8742 public boolean isActionableForAccessibility() { 8743 return (isClickable() || isLongClickable() || isFocusable()); 8744 } 8745 8746 /** 8747 * Returns whether the View has registered callbacks which makes it 8748 * important for accessibility. 8749 * 8750 * @return True if the view is actionable for accessibility. 8751 */ 8752 private boolean hasListenersForAccessibility() { 8753 ListenerInfo info = getListenerInfo(); 8754 return mTouchDelegate != null || info.mOnKeyListener != null 8755 || info.mOnTouchListener != null || info.mOnGenericMotionListener != null 8756 || info.mOnHoverListener != null || info.mOnDragListener != null; 8757 } 8758 8759 /** 8760 * Notifies that the accessibility state of this view changed. The change 8761 * is local to this view and does not represent structural changes such 8762 * as children and parent. For example, the view became focusable. The 8763 * notification is at at most once every 8764 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()} 8765 * to avoid unnecessary load to the system. Also once a view has a pending 8766 * notification this method is a NOP until the notification has been sent. 8767 * 8768 * @hide 8769 */ 8770 public void notifyViewAccessibilityStateChangedIfNeeded(int changeType) { 8771 if (!AccessibilityManager.getInstance(mContext).isEnabled() || mAttachInfo == null) { 8772 return; 8773 } 8774 if (mSendViewStateChangedAccessibilityEvent == null) { 8775 mSendViewStateChangedAccessibilityEvent = 8776 new SendViewStateChangedAccessibilityEvent(); 8777 } 8778 mSendViewStateChangedAccessibilityEvent.runOrPost(changeType); 8779 } 8780 8781 /** 8782 * Notifies that the accessibility state of this view changed. The change 8783 * is *not* local to this view and does represent structural changes such 8784 * as children and parent. For example, the view size changed. The 8785 * notification is at at most once every 8786 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()} 8787 * to avoid unnecessary load to the system. Also once a view has a pending 8788 * notification this method is a NOP until the notification has been sent. 8789 * 8790 * @hide 8791 */ 8792 public void notifySubtreeAccessibilityStateChangedIfNeeded() { 8793 if (!AccessibilityManager.getInstance(mContext).isEnabled() || mAttachInfo == null) { 8794 return; 8795 } 8796 if ((mPrivateFlags2 & PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED) == 0) { 8797 mPrivateFlags2 |= PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED; 8798 if (mParent != null) { 8799 try { 8800 mParent.notifySubtreeAccessibilityStateChanged( 8801 this, this, AccessibilityEvent.CONTENT_CHANGE_TYPE_SUBTREE); 8802 } catch (AbstractMethodError e) { 8803 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 8804 " does not fully implement ViewParent", e); 8805 } 8806 } 8807 } 8808 } 8809 8810 /** 8811 * Change the visibility of the View without triggering any other changes. This is 8812 * important for transitions, where visibility changes should not adjust focus or 8813 * trigger a new layout. This is only used when the visibility has already been changed 8814 * and we need a transient value during an animation. When the animation completes, 8815 * the original visibility value is always restored. 8816 * 8817 * @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. 8818 * @hide 8819 */ 8820 public void setTransitionVisibility(@Visibility int visibility) { 8821 mViewFlags = (mViewFlags & ~View.VISIBILITY_MASK) | visibility; 8822 } 8823 8824 /** 8825 * Reset the flag indicating the accessibility state of the subtree rooted 8826 * at this view changed. 8827 */ 8828 void resetSubtreeAccessibilityStateChanged() { 8829 mPrivateFlags2 &= ~PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED; 8830 } 8831 8832 /** 8833 * Report an accessibility action to this view's parents for delegated processing. 8834 * 8835 * <p>Implementations of {@link #performAccessibilityAction(int, Bundle)} may internally 8836 * call this method to delegate an accessibility action to a supporting parent. If the parent 8837 * returns true from its 8838 * {@link ViewParent#onNestedPrePerformAccessibilityAction(View, int, android.os.Bundle)} 8839 * method this method will return true to signify that the action was consumed.</p> 8840 * 8841 * <p>This method is useful for implementing nested scrolling child views. If 8842 * {@link #isNestedScrollingEnabled()} returns true and the action is a scrolling action 8843 * a custom view implementation may invoke this method to allow a parent to consume the 8844 * scroll first. If this method returns true the custom view should skip its own scrolling 8845 * behavior.</p> 8846 * 8847 * @param action Accessibility action to delegate 8848 * @param arguments Optional action arguments 8849 * @return true if the action was consumed by a parent 8850 */ 8851 public boolean dispatchNestedPrePerformAccessibilityAction(int action, Bundle arguments) { 8852 for (ViewParent p = getParent(); p != null; p = p.getParent()) { 8853 if (p.onNestedPrePerformAccessibilityAction(this, action, arguments)) { 8854 return true; 8855 } 8856 } 8857 return false; 8858 } 8859 8860 /** 8861 * Performs the specified accessibility action on the view. For 8862 * possible accessibility actions look at {@link AccessibilityNodeInfo}. 8863 * <p> 8864 * If an {@link AccessibilityDelegate} has been specified via calling 8865 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 8866 * {@link AccessibilityDelegate#performAccessibilityAction(View, int, Bundle)} 8867 * is responsible for handling this call. 8868 * </p> 8869 * 8870 * <p>The default implementation will delegate 8871 * {@link AccessibilityNodeInfo#ACTION_SCROLL_BACKWARD} and 8872 * {@link AccessibilityNodeInfo#ACTION_SCROLL_FORWARD} to nested scrolling parents if 8873 * {@link #isNestedScrollingEnabled() nested scrolling is enabled} on this view.</p> 8874 * 8875 * @param action The action to perform. 8876 * @param arguments Optional action arguments. 8877 * @return Whether the action was performed. 8878 */ 8879 public boolean performAccessibilityAction(int action, Bundle arguments) { 8880 if (mAccessibilityDelegate != null) { 8881 return mAccessibilityDelegate.performAccessibilityAction(this, action, arguments); 8882 } else { 8883 return performAccessibilityActionInternal(action, arguments); 8884 } 8885 } 8886 8887 /** 8888 * @see #performAccessibilityAction(int, Bundle) 8889 * 8890 * Note: Called from the default {@link AccessibilityDelegate}. 8891 * 8892 * @hide 8893 */ 8894 public boolean performAccessibilityActionInternal(int action, Bundle arguments) { 8895 if (isNestedScrollingEnabled() 8896 && (action == AccessibilityNodeInfo.ACTION_SCROLL_BACKWARD 8897 || action == AccessibilityNodeInfo.ACTION_SCROLL_FORWARD 8898 || action == R.id.accessibilityActionScrollUp 8899 || action == R.id.accessibilityActionScrollLeft 8900 || action == R.id.accessibilityActionScrollDown 8901 || action == R.id.accessibilityActionScrollRight)) { 8902 if (dispatchNestedPrePerformAccessibilityAction(action, arguments)) { 8903 return true; 8904 } 8905 } 8906 8907 switch (action) { 8908 case AccessibilityNodeInfo.ACTION_CLICK: { 8909 if (isClickable()) { 8910 performClick(); 8911 return true; 8912 } 8913 } break; 8914 case AccessibilityNodeInfo.ACTION_LONG_CLICK: { 8915 if (isLongClickable()) { 8916 performLongClick(); 8917 return true; 8918 } 8919 } break; 8920 case AccessibilityNodeInfo.ACTION_FOCUS: { 8921 if (!hasFocus()) { 8922 // Get out of touch mode since accessibility 8923 // wants to move focus around. 8924 getViewRootImpl().ensureTouchMode(false); 8925 return requestFocus(); 8926 } 8927 } break; 8928 case AccessibilityNodeInfo.ACTION_CLEAR_FOCUS: { 8929 if (hasFocus()) { 8930 clearFocus(); 8931 return !isFocused(); 8932 } 8933 } break; 8934 case AccessibilityNodeInfo.ACTION_SELECT: { 8935 if (!isSelected()) { 8936 setSelected(true); 8937 return isSelected(); 8938 } 8939 } break; 8940 case AccessibilityNodeInfo.ACTION_CLEAR_SELECTION: { 8941 if (isSelected()) { 8942 setSelected(false); 8943 return !isSelected(); 8944 } 8945 } break; 8946 case AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS: { 8947 if (!isAccessibilityFocused()) { 8948 return requestAccessibilityFocus(); 8949 } 8950 } break; 8951 case AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS: { 8952 if (isAccessibilityFocused()) { 8953 clearAccessibilityFocus(); 8954 return true; 8955 } 8956 } break; 8957 case AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY: { 8958 if (arguments != null) { 8959 final int granularity = arguments.getInt( 8960 AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT); 8961 final boolean extendSelection = arguments.getBoolean( 8962 AccessibilityNodeInfo.ACTION_ARGUMENT_EXTEND_SELECTION_BOOLEAN); 8963 return traverseAtGranularity(granularity, true, extendSelection); 8964 } 8965 } break; 8966 case AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY: { 8967 if (arguments != null) { 8968 final int granularity = arguments.getInt( 8969 AccessibilityNodeInfo.ACTION_ARGUMENT_MOVEMENT_GRANULARITY_INT); 8970 final boolean extendSelection = arguments.getBoolean( 8971 AccessibilityNodeInfo.ACTION_ARGUMENT_EXTEND_SELECTION_BOOLEAN); 8972 return traverseAtGranularity(granularity, false, extendSelection); 8973 } 8974 } break; 8975 case AccessibilityNodeInfo.ACTION_SET_SELECTION: { 8976 CharSequence text = getIterableTextForAccessibility(); 8977 if (text == null) { 8978 return false; 8979 } 8980 final int start = (arguments != null) ? arguments.getInt( 8981 AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_START_INT, -1) : -1; 8982 final int end = (arguments != null) ? arguments.getInt( 8983 AccessibilityNodeInfo.ACTION_ARGUMENT_SELECTION_END_INT, -1) : -1; 8984 // Only cursor position can be specified (selection length == 0) 8985 if ((getAccessibilitySelectionStart() != start 8986 || getAccessibilitySelectionEnd() != end) 8987 && (start == end)) { 8988 setAccessibilitySelection(start, end); 8989 notifyViewAccessibilityStateChangedIfNeeded( 8990 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 8991 return true; 8992 } 8993 } break; 8994 case R.id.accessibilityActionShowOnScreen: { 8995 if (mAttachInfo != null) { 8996 final Rect r = mAttachInfo.mTmpInvalRect; 8997 getDrawingRect(r); 8998 return requestRectangleOnScreen(r, true); 8999 } 9000 } break; 9001 case R.id.accessibilityActionContextClick: { 9002 if (isContextClickable()) { 9003 performContextClick(); 9004 return true; 9005 } 9006 } break; 9007 } 9008 return false; 9009 } 9010 9011 private boolean traverseAtGranularity(int granularity, boolean forward, 9012 boolean extendSelection) { 9013 CharSequence text = getIterableTextForAccessibility(); 9014 if (text == null || text.length() == 0) { 9015 return false; 9016 } 9017 TextSegmentIterator iterator = getIteratorForGranularity(granularity); 9018 if (iterator == null) { 9019 return false; 9020 } 9021 int current = getAccessibilitySelectionEnd(); 9022 if (current == ACCESSIBILITY_CURSOR_POSITION_UNDEFINED) { 9023 current = forward ? 0 : text.length(); 9024 } 9025 final int[] range = forward ? iterator.following(current) : iterator.preceding(current); 9026 if (range == null) { 9027 return false; 9028 } 9029 final int segmentStart = range[0]; 9030 final int segmentEnd = range[1]; 9031 int selectionStart; 9032 int selectionEnd; 9033 if (extendSelection && isAccessibilitySelectionExtendable()) { 9034 selectionStart = getAccessibilitySelectionStart(); 9035 if (selectionStart == ACCESSIBILITY_CURSOR_POSITION_UNDEFINED) { 9036 selectionStart = forward ? segmentStart : segmentEnd; 9037 } 9038 selectionEnd = forward ? segmentEnd : segmentStart; 9039 } else { 9040 selectionStart = selectionEnd= forward ? segmentEnd : segmentStart; 9041 } 9042 setAccessibilitySelection(selectionStart, selectionEnd); 9043 final int action = forward ? AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY 9044 : AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY; 9045 sendViewTextTraversedAtGranularityEvent(action, granularity, segmentStart, segmentEnd); 9046 return true; 9047 } 9048 9049 /** 9050 * Gets the text reported for accessibility purposes. 9051 * 9052 * @return The accessibility text. 9053 * 9054 * @hide 9055 */ 9056 public CharSequence getIterableTextForAccessibility() { 9057 return getContentDescription(); 9058 } 9059 9060 /** 9061 * Gets whether accessibility selection can be extended. 9062 * 9063 * @return If selection is extensible. 9064 * 9065 * @hide 9066 */ 9067 public boolean isAccessibilitySelectionExtendable() { 9068 return false; 9069 } 9070 9071 /** 9072 * @hide 9073 */ 9074 public int getAccessibilitySelectionStart() { 9075 return mAccessibilityCursorPosition; 9076 } 9077 9078 /** 9079 * @hide 9080 */ 9081 public int getAccessibilitySelectionEnd() { 9082 return getAccessibilitySelectionStart(); 9083 } 9084 9085 /** 9086 * @hide 9087 */ 9088 public void setAccessibilitySelection(int start, int end) { 9089 if (start == end && end == mAccessibilityCursorPosition) { 9090 return; 9091 } 9092 if (start >= 0 && start == end && end <= getIterableTextForAccessibility().length()) { 9093 mAccessibilityCursorPosition = start; 9094 } else { 9095 mAccessibilityCursorPosition = ACCESSIBILITY_CURSOR_POSITION_UNDEFINED; 9096 } 9097 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED); 9098 } 9099 9100 private void sendViewTextTraversedAtGranularityEvent(int action, int granularity, 9101 int fromIndex, int toIndex) { 9102 if (mParent == null) { 9103 return; 9104 } 9105 AccessibilityEvent event = AccessibilityEvent.obtain( 9106 AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY); 9107 onInitializeAccessibilityEvent(event); 9108 onPopulateAccessibilityEvent(event); 9109 event.setFromIndex(fromIndex); 9110 event.setToIndex(toIndex); 9111 event.setAction(action); 9112 event.setMovementGranularity(granularity); 9113 mParent.requestSendAccessibilityEvent(this, event); 9114 } 9115 9116 /** 9117 * @hide 9118 */ 9119 public TextSegmentIterator getIteratorForGranularity(int granularity) { 9120 switch (granularity) { 9121 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_CHARACTER: { 9122 CharSequence text = getIterableTextForAccessibility(); 9123 if (text != null && text.length() > 0) { 9124 CharacterTextSegmentIterator iterator = 9125 CharacterTextSegmentIterator.getInstance( 9126 mContext.getResources().getConfiguration().locale); 9127 iterator.initialize(text.toString()); 9128 return iterator; 9129 } 9130 } break; 9131 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_WORD: { 9132 CharSequence text = getIterableTextForAccessibility(); 9133 if (text != null && text.length() > 0) { 9134 WordTextSegmentIterator iterator = 9135 WordTextSegmentIterator.getInstance( 9136 mContext.getResources().getConfiguration().locale); 9137 iterator.initialize(text.toString()); 9138 return iterator; 9139 } 9140 } break; 9141 case AccessibilityNodeInfo.MOVEMENT_GRANULARITY_PARAGRAPH: { 9142 CharSequence text = getIterableTextForAccessibility(); 9143 if (text != null && text.length() > 0) { 9144 ParagraphTextSegmentIterator iterator = 9145 ParagraphTextSegmentIterator.getInstance(); 9146 iterator.initialize(text.toString()); 9147 return iterator; 9148 } 9149 } break; 9150 } 9151 return null; 9152 } 9153 9154 /** 9155 * @hide 9156 */ 9157 public void dispatchStartTemporaryDetach() { 9158 onStartTemporaryDetach(); 9159 } 9160 9161 /** 9162 * This is called when a container is going to temporarily detach a child, with 9163 * {@link ViewGroup#detachViewFromParent(View) ViewGroup.detachViewFromParent}. 9164 * It will either be followed by {@link #onFinishTemporaryDetach()} or 9165 * {@link #onDetachedFromWindow()} when the container is done. 9166 */ 9167 public void onStartTemporaryDetach() { 9168 removeUnsetPressCallback(); 9169 mPrivateFlags |= PFLAG_CANCEL_NEXT_UP_EVENT; 9170 } 9171 9172 /** 9173 * @hide 9174 */ 9175 public void dispatchFinishTemporaryDetach() { 9176 onFinishTemporaryDetach(); 9177 } 9178 9179 /** 9180 * Called after {@link #onStartTemporaryDetach} when the container is done 9181 * changing the view. 9182 */ 9183 public void onFinishTemporaryDetach() { 9184 } 9185 9186 /** 9187 * Return the global {@link KeyEvent.DispatcherState KeyEvent.DispatcherState} 9188 * for this view's window. Returns null if the view is not currently attached 9189 * to the window. Normally you will not need to use this directly, but 9190 * just use the standard high-level event callbacks like 9191 * {@link #onKeyDown(int, KeyEvent)}. 9192 */ 9193 public KeyEvent.DispatcherState getKeyDispatcherState() { 9194 return mAttachInfo != null ? mAttachInfo.mKeyDispatchState : null; 9195 } 9196 9197 /** 9198 * Dispatch a key event before it is processed by any input method 9199 * associated with the view hierarchy. This can be used to intercept 9200 * key events in special situations before the IME consumes them; a 9201 * typical example would be handling the BACK key to update the application's 9202 * UI instead of allowing the IME to see it and close itself. 9203 * 9204 * @param event The key event to be dispatched. 9205 * @return True if the event was handled, false otherwise. 9206 */ 9207 public boolean dispatchKeyEventPreIme(KeyEvent event) { 9208 return onKeyPreIme(event.getKeyCode(), event); 9209 } 9210 9211 /** 9212 * Dispatch a key event to the next view on the focus path. This path runs 9213 * from the top of the view tree down to the currently focused view. If this 9214 * view has focus, it will dispatch to itself. Otherwise it will dispatch 9215 * the next node down the focus path. This method also fires any key 9216 * listeners. 9217 * 9218 * @param event The key event to be dispatched. 9219 * @return True if the event was handled, false otherwise. 9220 */ 9221 public boolean dispatchKeyEvent(KeyEvent event) { 9222 if (mInputEventConsistencyVerifier != null) { 9223 mInputEventConsistencyVerifier.onKeyEvent(event, 0); 9224 } 9225 9226 // Give any attached key listener a first crack at the event. 9227 //noinspection SimplifiableIfStatement 9228 ListenerInfo li = mListenerInfo; 9229 if (li != null && li.mOnKeyListener != null && (mViewFlags & ENABLED_MASK) == ENABLED 9230 && li.mOnKeyListener.onKey(this, event.getKeyCode(), event)) { 9231 return true; 9232 } 9233 9234 if (event.dispatch(this, mAttachInfo != null 9235 ? mAttachInfo.mKeyDispatchState : null, this)) { 9236 return true; 9237 } 9238 9239 if (mInputEventConsistencyVerifier != null) { 9240 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 9241 } 9242 return false; 9243 } 9244 9245 /** 9246 * Dispatches a key shortcut event. 9247 * 9248 * @param event The key event to be dispatched. 9249 * @return True if the event was handled by the view, false otherwise. 9250 */ 9251 public boolean dispatchKeyShortcutEvent(KeyEvent event) { 9252 return onKeyShortcut(event.getKeyCode(), event); 9253 } 9254 9255 /** 9256 * Pass the touch screen motion event down to the target view, or this 9257 * view if it is the target. 9258 * 9259 * @param event The motion event to be dispatched. 9260 * @return True if the event was handled by the view, false otherwise. 9261 */ 9262 public boolean dispatchTouchEvent(MotionEvent event) { 9263 // If the event should be handled by accessibility focus first. 9264 if (event.isTargetAccessibilityFocus()) { 9265 // We don't have focus or no virtual descendant has it, do not handle the event. 9266 if (!isAccessibilityFocusedViewOrHost()) { 9267 return false; 9268 } 9269 // We have focus and got the event, then use normal event dispatch. 9270 event.setTargetAccessibilityFocus(false); 9271 } 9272 9273 boolean result = false; 9274 9275 if (mInputEventConsistencyVerifier != null) { 9276 mInputEventConsistencyVerifier.onTouchEvent(event, 0); 9277 } 9278 9279 final int actionMasked = event.getActionMasked(); 9280 if (actionMasked == MotionEvent.ACTION_DOWN) { 9281 // Defensive cleanup for new gesture 9282 stopNestedScroll(); 9283 } 9284 9285 if (onFilterTouchEventForSecurity(event)) { 9286 //noinspection SimplifiableIfStatement 9287 ListenerInfo li = mListenerInfo; 9288 if (li != null && li.mOnTouchListener != null 9289 && (mViewFlags & ENABLED_MASK) == ENABLED 9290 && li.mOnTouchListener.onTouch(this, event)) { 9291 result = true; 9292 } 9293 9294 if (!result && onTouchEvent(event)) { 9295 result = true; 9296 } 9297 } 9298 9299 if (!result && mInputEventConsistencyVerifier != null) { 9300 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 9301 } 9302 9303 // Clean up after nested scrolls if this is the end of a gesture; 9304 // also cancel it if we tried an ACTION_DOWN but we didn't want the rest 9305 // of the gesture. 9306 if (actionMasked == MotionEvent.ACTION_UP || 9307 actionMasked == MotionEvent.ACTION_CANCEL || 9308 (actionMasked == MotionEvent.ACTION_DOWN && !result)) { 9309 stopNestedScroll(); 9310 } 9311 9312 return result; 9313 } 9314 9315 boolean isAccessibilityFocusedViewOrHost() { 9316 return isAccessibilityFocused() || (getViewRootImpl() != null && getViewRootImpl() 9317 .getAccessibilityFocusedHost() == this); 9318 } 9319 9320 /** 9321 * Filter the touch event to apply security policies. 9322 * 9323 * @param event The motion event to be filtered. 9324 * @return True if the event should be dispatched, false if the event should be dropped. 9325 * 9326 * @see #getFilterTouchesWhenObscured 9327 */ 9328 public boolean onFilterTouchEventForSecurity(MotionEvent event) { 9329 //noinspection RedundantIfStatement 9330 if ((mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0 9331 && (event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0) { 9332 // Window is obscured, drop this touch. 9333 return false; 9334 } 9335 return true; 9336 } 9337 9338 /** 9339 * Pass a trackball motion event down to the focused view. 9340 * 9341 * @param event The motion event to be dispatched. 9342 * @return True if the event was handled by the view, false otherwise. 9343 */ 9344 public boolean dispatchTrackballEvent(MotionEvent event) { 9345 if (mInputEventConsistencyVerifier != null) { 9346 mInputEventConsistencyVerifier.onTrackballEvent(event, 0); 9347 } 9348 9349 return onTrackballEvent(event); 9350 } 9351 9352 /** 9353 * Dispatch a generic motion event. 9354 * <p> 9355 * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} 9356 * are delivered to the view under the pointer. All other generic motion events are 9357 * delivered to the focused view. Hover events are handled specially and are delivered 9358 * to {@link #onHoverEvent(MotionEvent)}. 9359 * </p> 9360 * 9361 * @param event The motion event to be dispatched. 9362 * @return True if the event was handled by the view, false otherwise. 9363 */ 9364 public boolean dispatchGenericMotionEvent(MotionEvent event) { 9365 if (mInputEventConsistencyVerifier != null) { 9366 mInputEventConsistencyVerifier.onGenericMotionEvent(event, 0); 9367 } 9368 9369 final int source = event.getSource(); 9370 if ((source & InputDevice.SOURCE_CLASS_POINTER) != 0) { 9371 final int action = event.getAction(); 9372 if (action == MotionEvent.ACTION_HOVER_ENTER 9373 || action == MotionEvent.ACTION_HOVER_MOVE 9374 || action == MotionEvent.ACTION_HOVER_EXIT) { 9375 if (dispatchHoverEvent(event)) { 9376 return true; 9377 } 9378 } else if (dispatchGenericPointerEvent(event)) { 9379 return true; 9380 } 9381 } else if (dispatchGenericFocusedEvent(event)) { 9382 return true; 9383 } 9384 9385 if (dispatchGenericMotionEventInternal(event)) { 9386 return true; 9387 } 9388 9389 if (mInputEventConsistencyVerifier != null) { 9390 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 9391 } 9392 return false; 9393 } 9394 9395 private boolean dispatchGenericMotionEventInternal(MotionEvent event) { 9396 //noinspection SimplifiableIfStatement 9397 ListenerInfo li = mListenerInfo; 9398 if (li != null && li.mOnGenericMotionListener != null 9399 && (mViewFlags & ENABLED_MASK) == ENABLED 9400 && li.mOnGenericMotionListener.onGenericMotion(this, event)) { 9401 return true; 9402 } 9403 9404 if (onGenericMotionEvent(event)) { 9405 return true; 9406 } 9407 9408 final int actionButton = event.getActionButton(); 9409 switch (event.getActionMasked()) { 9410 case MotionEvent.ACTION_BUTTON_PRESS: 9411 if (isContextClickable() && !mInContextButtonPress && !mHasPerformedLongPress 9412 && (actionButton == MotionEvent.BUTTON_STYLUS_PRIMARY 9413 || actionButton == MotionEvent.BUTTON_SECONDARY)) { 9414 if (performContextClick()) { 9415 mInContextButtonPress = true; 9416 setPressed(true, event.getX(), event.getY()); 9417 removeTapCallback(); 9418 removeLongPressCallback(); 9419 return true; 9420 } 9421 } 9422 break; 9423 9424 case MotionEvent.ACTION_BUTTON_RELEASE: 9425 if (mInContextButtonPress && (actionButton == MotionEvent.BUTTON_STYLUS_PRIMARY 9426 || actionButton == MotionEvent.BUTTON_SECONDARY)) { 9427 mInContextButtonPress = false; 9428 mIgnoreNextUpEvent = true; 9429 } 9430 break; 9431 } 9432 9433 if (mInputEventConsistencyVerifier != null) { 9434 mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); 9435 } 9436 return false; 9437 } 9438 9439 /** 9440 * Dispatch a hover event. 9441 * <p> 9442 * Do not call this method directly. 9443 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 9444 * </p> 9445 * 9446 * @param event The motion event to be dispatched. 9447 * @return True if the event was handled by the view, false otherwise. 9448 */ 9449 protected boolean dispatchHoverEvent(MotionEvent event) { 9450 ListenerInfo li = mListenerInfo; 9451 //noinspection SimplifiableIfStatement 9452 if (li != null && li.mOnHoverListener != null 9453 && (mViewFlags & ENABLED_MASK) == ENABLED 9454 && li.mOnHoverListener.onHover(this, event)) { 9455 return true; 9456 } 9457 9458 return onHoverEvent(event); 9459 } 9460 9461 /** 9462 * Returns true if the view has a child to which it has recently sent 9463 * {@link MotionEvent#ACTION_HOVER_ENTER}. If this view is hovered and 9464 * it does not have a hovered child, then it must be the innermost hovered view. 9465 * @hide 9466 */ 9467 protected boolean hasHoveredChild() { 9468 return false; 9469 } 9470 9471 /** 9472 * Dispatch a generic motion event to the view under the first pointer. 9473 * <p> 9474 * Do not call this method directly. 9475 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 9476 * </p> 9477 * 9478 * @param event The motion event to be dispatched. 9479 * @return True if the event was handled by the view, false otherwise. 9480 */ 9481 protected boolean dispatchGenericPointerEvent(MotionEvent event) { 9482 return false; 9483 } 9484 9485 /** 9486 * Dispatch a generic motion event to the currently focused view. 9487 * <p> 9488 * Do not call this method directly. 9489 * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. 9490 * </p> 9491 * 9492 * @param event The motion event to be dispatched. 9493 * @return True if the event was handled by the view, false otherwise. 9494 */ 9495 protected boolean dispatchGenericFocusedEvent(MotionEvent event) { 9496 return false; 9497 } 9498 9499 /** 9500 * Dispatch a pointer event. 9501 * <p> 9502 * Dispatches touch related pointer events to {@link #onTouchEvent(MotionEvent)} and all 9503 * other events to {@link #onGenericMotionEvent(MotionEvent)}. This separation of concerns 9504 * reinforces the invariant that {@link #onTouchEvent(MotionEvent)} is really about touches 9505 * and should not be expected to handle other pointing device features. 9506 * </p> 9507 * 9508 * @param event The motion event to be dispatched. 9509 * @return True if the event was handled by the view, false otherwise. 9510 * @hide 9511 */ 9512 public final boolean dispatchPointerEvent(MotionEvent event) { 9513 if (event.isTouchEvent()) { 9514 return dispatchTouchEvent(event); 9515 } else { 9516 return dispatchGenericMotionEvent(event); 9517 } 9518 } 9519 9520 /** 9521 * Called when the window containing this view gains or loses window focus. 9522 * ViewGroups should override to route to their children. 9523 * 9524 * @param hasFocus True if the window containing this view now has focus, 9525 * false otherwise. 9526 */ 9527 public void dispatchWindowFocusChanged(boolean hasFocus) { 9528 onWindowFocusChanged(hasFocus); 9529 } 9530 9531 /** 9532 * Called when the window containing this view gains or loses focus. Note 9533 * that this is separate from view focus: to receive key events, both 9534 * your view and its window must have focus. If a window is displayed 9535 * on top of yours that takes input focus, then your own window will lose 9536 * focus but the view focus will remain unchanged. 9537 * 9538 * @param hasWindowFocus True if the window containing this view now has 9539 * focus, false otherwise. 9540 */ 9541 public void onWindowFocusChanged(boolean hasWindowFocus) { 9542 InputMethodManager imm = InputMethodManager.peekInstance(); 9543 if (!hasWindowFocus) { 9544 if (isPressed()) { 9545 setPressed(false); 9546 } 9547 if (imm != null && (mPrivateFlags & PFLAG_FOCUSED) != 0) { 9548 imm.focusOut(this); 9549 } 9550 removeLongPressCallback(); 9551 removeTapCallback(); 9552 onFocusLost(); 9553 } else if (imm != null && (mPrivateFlags & PFLAG_FOCUSED) != 0) { 9554 imm.focusIn(this); 9555 } 9556 refreshDrawableState(); 9557 } 9558 9559 /** 9560 * Returns true if this view is in a window that currently has window focus. 9561 * Note that this is not the same as the view itself having focus. 9562 * 9563 * @return True if this view is in a window that currently has window focus. 9564 */ 9565 public boolean hasWindowFocus() { 9566 return mAttachInfo != null && mAttachInfo.mHasWindowFocus; 9567 } 9568 9569 /** 9570 * Dispatch a view visibility change down the view hierarchy. 9571 * ViewGroups should override to route to their children. 9572 * @param changedView The view whose visibility changed. Could be 'this' or 9573 * an ancestor view. 9574 * @param visibility The new visibility of changedView: {@link #VISIBLE}, 9575 * {@link #INVISIBLE} or {@link #GONE}. 9576 */ 9577 protected void dispatchVisibilityChanged(@NonNull View changedView, 9578 @Visibility int visibility) { 9579 onVisibilityChanged(changedView, visibility); 9580 } 9581 9582 /** 9583 * Called when the visibility of the view or an ancestor of the view has 9584 * changed. 9585 * 9586 * @param changedView The view whose visibility changed. May be 9587 * {@code this} or an ancestor view. 9588 * @param visibility The new visibility, one of {@link #VISIBLE}, 9589 * {@link #INVISIBLE} or {@link #GONE}. 9590 */ 9591 protected void onVisibilityChanged(@NonNull View changedView, @Visibility int visibility) { 9592 final boolean visible = visibility == VISIBLE && getVisibility() == VISIBLE; 9593 if (visible && mAttachInfo != null) { 9594 initialAwakenScrollBars(); 9595 } 9596 9597 final Drawable dr = mBackground; 9598 if (dr != null && visible != dr.isVisible()) { 9599 dr.setVisible(visible, false); 9600 } 9601 final Drawable fg = mForegroundInfo != null ? mForegroundInfo.mDrawable : null; 9602 if (fg != null && visible != fg.isVisible()) { 9603 fg.setVisible(visible, false); 9604 } 9605 } 9606 9607 /** 9608 * Dispatch a hint about whether this view is displayed. For instance, when 9609 * a View moves out of the screen, it might receives a display hint indicating 9610 * the view is not displayed. Applications should not <em>rely</em> on this hint 9611 * as there is no guarantee that they will receive one. 9612 * 9613 * @param hint A hint about whether or not this view is displayed: 9614 * {@link #VISIBLE} or {@link #INVISIBLE}. 9615 */ 9616 public void dispatchDisplayHint(@Visibility int hint) { 9617 onDisplayHint(hint); 9618 } 9619 9620 /** 9621 * Gives this view a hint about whether is displayed or not. For instance, when 9622 * a View moves out of the screen, it might receives a display hint indicating 9623 * the view is not displayed. Applications should not <em>rely</em> on this hint 9624 * as there is no guarantee that they will receive one. 9625 * 9626 * @param hint A hint about whether or not this view is displayed: 9627 * {@link #VISIBLE} or {@link #INVISIBLE}. 9628 */ 9629 protected void onDisplayHint(@Visibility int hint) { 9630 } 9631 9632 /** 9633 * Dispatch a window visibility change down the view hierarchy. 9634 * ViewGroups should override to route to their children. 9635 * 9636 * @param visibility The new visibility of the window. 9637 * 9638 * @see #onWindowVisibilityChanged(int) 9639 */ 9640 public void dispatchWindowVisibilityChanged(@Visibility int visibility) { 9641 onWindowVisibilityChanged(visibility); 9642 } 9643 9644 /** 9645 * Called when the window containing has change its visibility 9646 * (between {@link #GONE}, {@link #INVISIBLE}, and {@link #VISIBLE}). Note 9647 * that this tells you whether or not your window is being made visible 9648 * to the window manager; this does <em>not</em> tell you whether or not 9649 * your window is obscured by other windows on the screen, even if it 9650 * is itself visible. 9651 * 9652 * @param visibility The new visibility of the window. 9653 */ 9654 protected void onWindowVisibilityChanged(@Visibility int visibility) { 9655 if (visibility == VISIBLE) { 9656 initialAwakenScrollBars(); 9657 } 9658 } 9659 9660 /** 9661 * Returns the current visibility of the window this view is attached to 9662 * (either {@link #GONE}, {@link #INVISIBLE}, or {@link #VISIBLE}). 9663 * 9664 * @return Returns the current visibility of the view's window. 9665 */ 9666 @Visibility 9667 public int getWindowVisibility() { 9668 return mAttachInfo != null ? mAttachInfo.mWindowVisibility : GONE; 9669 } 9670 9671 /** 9672 * Retrieve the overall visible display size in which the window this view is 9673 * attached to has been positioned in. This takes into account screen 9674 * decorations above the window, for both cases where the window itself 9675 * is being position inside of them or the window is being placed under 9676 * then and covered insets are used for the window to position its content 9677 * inside. In effect, this tells you the available area where content can 9678 * be placed and remain visible to users. 9679 * 9680 * <p>This function requires an IPC back to the window manager to retrieve 9681 * the requested information, so should not be used in performance critical 9682 * code like drawing. 9683 * 9684 * @param outRect Filled in with the visible display frame. If the view 9685 * is not attached to a window, this is simply the raw display size. 9686 */ 9687 public void getWindowVisibleDisplayFrame(Rect outRect) { 9688 if (mAttachInfo != null) { 9689 try { 9690 mAttachInfo.mSession.getDisplayFrame(mAttachInfo.mWindow, outRect); 9691 } catch (RemoteException e) { 9692 return; 9693 } 9694 // XXX This is really broken, and probably all needs to be done 9695 // in the window manager, and we need to know more about whether 9696 // we want the area behind or in front of the IME. 9697 final Rect insets = mAttachInfo.mVisibleInsets; 9698 outRect.left += insets.left; 9699 outRect.top += insets.top; 9700 outRect.right -= insets.right; 9701 outRect.bottom -= insets.bottom; 9702 return; 9703 } 9704 // The view is not attached to a display so we don't have a context. 9705 // Make a best guess about the display size. 9706 Display d = DisplayManagerGlobal.getInstance().getRealDisplay(Display.DEFAULT_DISPLAY); 9707 d.getRectSize(outRect); 9708 } 9709 9710 /** 9711 * Dispatch a notification about a resource configuration change down 9712 * the view hierarchy. 9713 * ViewGroups should override to route to their children. 9714 * 9715 * @param newConfig The new resource configuration. 9716 * 9717 * @see #onConfigurationChanged(android.content.res.Configuration) 9718 */ 9719 public void dispatchConfigurationChanged(Configuration newConfig) { 9720 onConfigurationChanged(newConfig); 9721 } 9722 9723 /** 9724 * Called when the current configuration of the resources being used 9725 * by the application have changed. You can use this to decide when 9726 * to reload resources that can changed based on orientation and other 9727 * configuration characteristics. You only need to use this if you are 9728 * not relying on the normal {@link android.app.Activity} mechanism of 9729 * recreating the activity instance upon a configuration change. 9730 * 9731 * @param newConfig The new resource configuration. 9732 */ 9733 protected void onConfigurationChanged(Configuration newConfig) { 9734 } 9735 9736 /** 9737 * Private function to aggregate all per-view attributes in to the view 9738 * root. 9739 */ 9740 void dispatchCollectViewAttributes(AttachInfo attachInfo, int visibility) { 9741 performCollectViewAttributes(attachInfo, visibility); 9742 } 9743 9744 void performCollectViewAttributes(AttachInfo attachInfo, int visibility) { 9745 if ((visibility & VISIBILITY_MASK) == VISIBLE) { 9746 if ((mViewFlags & KEEP_SCREEN_ON) == KEEP_SCREEN_ON) { 9747 attachInfo.mKeepScreenOn = true; 9748 } 9749 attachInfo.mSystemUiVisibility |= mSystemUiVisibility; 9750 ListenerInfo li = mListenerInfo; 9751 if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { 9752 attachInfo.mHasSystemUiListeners = true; 9753 } 9754 } 9755 } 9756 9757 void needGlobalAttributesUpdate(boolean force) { 9758 final AttachInfo ai = mAttachInfo; 9759 if (ai != null && !ai.mRecomputeGlobalAttributes) { 9760 if (force || ai.mKeepScreenOn || (ai.mSystemUiVisibility != 0) 9761 || ai.mHasSystemUiListeners) { 9762 ai.mRecomputeGlobalAttributes = true; 9763 } 9764 } 9765 } 9766 9767 /** 9768 * Returns whether the device is currently in touch mode. Touch mode is entered 9769 * once the user begins interacting with the device by touch, and affects various 9770 * things like whether focus is always visible to the user. 9771 * 9772 * @return Whether the device is in touch mode. 9773 */ 9774 @ViewDebug.ExportedProperty 9775 public boolean isInTouchMode() { 9776 if (mAttachInfo != null) { 9777 return mAttachInfo.mInTouchMode; 9778 } else { 9779 return ViewRootImpl.isInTouchMode(); 9780 } 9781 } 9782 9783 /** 9784 * Returns the context the view is running in, through which it can 9785 * access the current theme, resources, etc. 9786 * 9787 * @return The view's Context. 9788 */ 9789 @ViewDebug.CapturedViewProperty 9790 public final Context getContext() { 9791 return mContext; 9792 } 9793 9794 /** 9795 * Handle a key event before it is processed by any input method 9796 * associated with the view hierarchy. This can be used to intercept 9797 * key events in special situations before the IME consumes them; a 9798 * typical example would be handling the BACK key to update the application's 9799 * UI instead of allowing the IME to see it and close itself. 9800 * 9801 * @param keyCode The value in event.getKeyCode(). 9802 * @param event Description of the key event. 9803 * @return If you handled the event, return true. If you want to allow the 9804 * event to be handled by the next receiver, return false. 9805 */ 9806 public boolean onKeyPreIme(int keyCode, KeyEvent event) { 9807 return false; 9808 } 9809 9810 /** 9811 * Default implementation of {@link KeyEvent.Callback#onKeyDown(int, KeyEvent) 9812 * KeyEvent.Callback.onKeyDown()}: perform press of the view 9813 * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or {@link KeyEvent#KEYCODE_ENTER} 9814 * is released, if the view is enabled and clickable. 9815 * 9816 * <p>Key presses in software keyboards will generally NOT trigger this listener, 9817 * although some may elect to do so in some situations. Do not rely on this to 9818 * catch software key presses. 9819 * 9820 * @param keyCode A key code that represents the button pressed, from 9821 * {@link android.view.KeyEvent}. 9822 * @param event The KeyEvent object that defines the button action. 9823 */ 9824 public boolean onKeyDown(int keyCode, KeyEvent event) { 9825 boolean result = false; 9826 9827 if (KeyEvent.isConfirmKey(keyCode)) { 9828 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 9829 return true; 9830 } 9831 // Long clickable items don't necessarily have to be clickable 9832 if (((mViewFlags & CLICKABLE) == CLICKABLE || 9833 (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) && 9834 (event.getRepeatCount() == 0)) { 9835 setPressed(true); 9836 checkForLongClick(0); 9837 return true; 9838 } 9839 } 9840 return result; 9841 } 9842 9843 /** 9844 * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) 9845 * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle 9846 * the event). 9847 * <p>Key presses in software keyboards will generally NOT trigger this listener, 9848 * although some may elect to do so in some situations. Do not rely on this to 9849 * catch software key presses. 9850 */ 9851 public boolean onKeyLongPress(int keyCode, KeyEvent event) { 9852 return false; 9853 } 9854 9855 /** 9856 * Default implementation of {@link KeyEvent.Callback#onKeyUp(int, KeyEvent) 9857 * KeyEvent.Callback.onKeyUp()}: perform clicking of the view 9858 * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or 9859 * {@link KeyEvent#KEYCODE_ENTER} is released. 9860 * <p>Key presses in software keyboards will generally NOT trigger this listener, 9861 * although some may elect to do so in some situations. Do not rely on this to 9862 * catch software key presses. 9863 * 9864 * @param keyCode A key code that represents the button pressed, from 9865 * {@link android.view.KeyEvent}. 9866 * @param event The KeyEvent object that defines the button action. 9867 */ 9868 public boolean onKeyUp(int keyCode, KeyEvent event) { 9869 if (KeyEvent.isConfirmKey(keyCode)) { 9870 if ((mViewFlags & ENABLED_MASK) == DISABLED) { 9871 return true; 9872 } 9873 if ((mViewFlags & CLICKABLE) == CLICKABLE && isPressed()) { 9874 setPressed(false); 9875 9876 if (!mHasPerformedLongPress) { 9877 // This is a tap, so remove the longpress check 9878 removeLongPressCallback(); 9879 return performClick(); 9880 } 9881 } 9882 } 9883 return false; 9884 } 9885 9886 /** 9887 * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) 9888 * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle 9889 * the event). 9890 * <p>Key presses in software keyboards will generally NOT trigger this listener, 9891 * although some may elect to do so in some situations. Do not rely on this to 9892 * catch software key presses. 9893 * 9894 * @param keyCode A key code that represents the button pressed, from 9895 * {@link android.view.KeyEvent}. 9896 * @param repeatCount The number of times the action was made. 9897 * @param event The KeyEvent object that defines the button action. 9898 */ 9899 public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { 9900 return false; 9901 } 9902 9903 /** 9904 * Called on the focused view when a key shortcut event is not handled. 9905 * Override this method to implement local key shortcuts for the View. 9906 * Key shortcuts can also be implemented by setting the 9907 * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. 9908 * 9909 * @param keyCode The value in event.getKeyCode(). 9910 * @param event Description of the key event. 9911 * @return If you handled the event, return true. If you want to allow the 9912 * event to be handled by the next receiver, return false. 9913 */ 9914 public boolean onKeyShortcut(int keyCode, KeyEvent event) { 9915 return false; 9916 } 9917 9918 /** 9919 * Check whether the called view is a text editor, in which case it 9920 * would make sense to automatically display a soft input window for 9921 * it. Subclasses should override this if they implement 9922 * {@link #onCreateInputConnection(EditorInfo)} to return true if 9923 * a call on that method would return a non-null InputConnection, and 9924 * they are really a first-class editor that the user would normally 9925 * start typing on when the go into a window containing your view. 9926 * 9927 * <p>The default implementation always returns false. This does 9928 * <em>not</em> mean that its {@link #onCreateInputConnection(EditorInfo)} 9929 * will not be called or the user can not otherwise perform edits on your 9930 * view; it is just a hint to the system that this is not the primary 9931 * purpose of this view. 9932 * 9933 * @return Returns true if this view is a text editor, else false. 9934 */ 9935 public boolean onCheckIsTextEditor() { 9936 return false; 9937 } 9938 9939 /** 9940 * Create a new InputConnection for an InputMethod to interact 9941 * with the view. The default implementation returns null, since it doesn't 9942 * support input methods. You can override this to implement such support. 9943 * This is only needed for views that take focus and text input. 9944 * 9945 * <p>When implementing this, you probably also want to implement 9946 * {@link #onCheckIsTextEditor()} to indicate you will return a 9947 * non-null InputConnection.</p> 9948 * 9949 * <p>Also, take good care to fill in the {@link android.view.inputmethod.EditorInfo} 9950 * object correctly and in its entirety, so that the connected IME can rely 9951 * on its values. For example, {@link android.view.inputmethod.EditorInfo#initialSelStart} 9952 * and {@link android.view.inputmethod.EditorInfo#initialSelEnd} members 9953 * must be filled in with the correct cursor position for IMEs to work correctly 9954 * with your application.</p> 9955 * 9956 * @param outAttrs Fill in with attribute information about the connection. 9957 */ 9958 public InputConnection onCreateInputConnection(EditorInfo outAttrs) { 9959 return null; 9960 } 9961 9962 /** 9963 * Called by the {@link android.view.inputmethod.InputMethodManager} 9964 * when a view who is not the current 9965 * input connection target is trying to make a call on the manager. The 9966 * default implementation returns false; you can override this to return 9967 * true for certain views if you are performing InputConnection proxying 9968 * to them. 9969 * @param view The View that is making the InputMethodManager call. 9970 * @return Return true to allow the call, false to reject. 9971 */ 9972 public boolean checkInputConnectionProxy(View view) { 9973 return false; 9974 } 9975 9976 /** 9977 * Show the context menu for this view. It is not safe to hold on to the 9978 * menu after returning from this method. 9979 * 9980 * You should normally not overload this method. Overload 9981 * {@link #onCreateContextMenu(ContextMenu)} or define an 9982 * {@link OnCreateContextMenuListener} to add items to the context menu. 9983 * 9984 * @param menu The context menu to populate 9985 */ 9986 public void createContextMenu(ContextMenu menu) { 9987 ContextMenuInfo menuInfo = getContextMenuInfo(); 9988 9989 // Sets the current menu info so all items added to menu will have 9990 // my extra info set. 9991 ((MenuBuilder)menu).setCurrentMenuInfo(menuInfo); 9992 9993 onCreateContextMenu(menu); 9994 ListenerInfo li = mListenerInfo; 9995 if (li != null && li.mOnCreateContextMenuListener != null) { 9996 li.mOnCreateContextMenuListener.onCreateContextMenu(menu, this, menuInfo); 9997 } 9998 9999 // Clear the extra information so subsequent items that aren't mine don't 10000 // have my extra info. 10001 ((MenuBuilder)menu).setCurrentMenuInfo(null); 10002 10003 if (mParent != null) { 10004 mParent.createContextMenu(menu); 10005 } 10006 } 10007 10008 /** 10009 * Views should implement this if they have extra information to associate 10010 * with the context menu. The return result is supplied as a parameter to 10011 * the {@link OnCreateContextMenuListener#onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} 10012 * callback. 10013 * 10014 * @return Extra information about the item for which the context menu 10015 * should be shown. This information will vary across different 10016 * subclasses of View. 10017 */ 10018 protected ContextMenuInfo getContextMenuInfo() { 10019 return null; 10020 } 10021 10022 /** 10023 * Views should implement this if the view itself is going to add items to 10024 * the context menu. 10025 * 10026 * @param menu the context menu to populate 10027 */ 10028 protected void onCreateContextMenu(ContextMenu menu) { 10029 } 10030 10031 /** 10032 * Implement this method to handle trackball motion events. The 10033 * <em>relative</em> movement of the trackball since the last event 10034 * can be retrieve with {@link MotionEvent#getX MotionEvent.getX()} and 10035 * {@link MotionEvent#getY MotionEvent.getY()}. These are normalized so 10036 * that a movement of 1 corresponds to the user pressing one DPAD key (so 10037 * they will often be fractional values, representing the more fine-grained 10038 * movement information available from a trackball). 10039 * 10040 * @param event The motion event. 10041 * @return True if the event was handled, false otherwise. 10042 */ 10043 public boolean onTrackballEvent(MotionEvent event) { 10044 return false; 10045 } 10046 10047 /** 10048 * Implement this method to handle generic motion events. 10049 * <p> 10050 * Generic motion events describe joystick movements, mouse hovers, track pad 10051 * touches, scroll wheel movements and other input events. The 10052 * {@link MotionEvent#getSource() source} of the motion event specifies 10053 * the class of input that was received. Implementations of this method 10054 * must examine the bits in the source before processing the event. 10055 * The following code example shows how this is done. 10056 * </p><p> 10057 * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} 10058 * are delivered to the view under the pointer. All other generic motion events are 10059 * delivered to the focused view. 10060 * </p> 10061 * <pre> public boolean onGenericMotionEvent(MotionEvent event) { 10062 * if (event.isFromSource(InputDevice.SOURCE_CLASS_JOYSTICK)) { 10063 * if (event.getAction() == MotionEvent.ACTION_MOVE) { 10064 * // process the joystick movement... 10065 * return true; 10066 * } 10067 * } 10068 * if (event.isFromSource(InputDevice.SOURCE_CLASS_POINTER)) { 10069 * switch (event.getAction()) { 10070 * case MotionEvent.ACTION_HOVER_MOVE: 10071 * // process the mouse hover movement... 10072 * return true; 10073 * case MotionEvent.ACTION_SCROLL: 10074 * // process the scroll wheel movement... 10075 * return true; 10076 * } 10077 * } 10078 * return super.onGenericMotionEvent(event); 10079 * }</pre> 10080 * 10081 * @param event The generic motion event being processed. 10082 * @return True if the event was handled, false otherwise. 10083 */ 10084 public boolean onGenericMotionEvent(MotionEvent event) { 10085 return false; 10086 } 10087 10088 /** 10089 * Implement this method to handle hover events. 10090 * <p> 10091 * This method is called whenever a pointer is hovering into, over, or out of the 10092 * bounds of a view and the view is not currently being touched. 10093 * Hover events are represented as pointer events with action 10094 * {@link MotionEvent#ACTION_HOVER_ENTER}, {@link MotionEvent#ACTION_HOVER_MOVE}, 10095 * or {@link MotionEvent#ACTION_HOVER_EXIT}. 10096 * </p> 10097 * <ul> 10098 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_ENTER} 10099 * when the pointer enters the bounds of the view.</li> 10100 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_MOVE} 10101 * when the pointer has already entered the bounds of the view and has moved.</li> 10102 * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_EXIT} 10103 * when the pointer has exited the bounds of the view or when the pointer is 10104 * about to go down due to a button click, tap, or similar user action that 10105 * causes the view to be touched.</li> 10106 * </ul> 10107 * <p> 10108 * The view should implement this method to return true to indicate that it is 10109 * handling the hover event, such as by changing its drawable state. 10110 * </p><p> 10111 * The default implementation calls {@link #setHovered} to update the hovered state 10112 * of the view when a hover enter or hover exit event is received, if the view 10113 * is enabled and is clickable. The default implementation also sends hover 10114 * accessibility events. 10115 * </p> 10116 * 10117 * @param event The motion event that describes the hover. 10118 * @return True if the view handled the hover event. 10119 * 10120 * @see #isHovered 10121 * @see #setHovered 10122 * @see #onHoverChanged 10123 */ 10124 public boolean onHoverEvent(MotionEvent event) { 10125 // The root view may receive hover (or touch) events that are outside the bounds of 10126 // the window. This code ensures that we only send accessibility events for 10127 // hovers that are actually within the bounds of the root view. 10128 final int action = event.getActionMasked(); 10129 if (!mSendingHoverAccessibilityEvents) { 10130 if ((action == MotionEvent.ACTION_HOVER_ENTER 10131 || action == MotionEvent.ACTION_HOVER_MOVE) 10132 && !hasHoveredChild() 10133 && pointInView(event.getX(), event.getY())) { 10134 sendAccessibilityHoverEvent(AccessibilityEvent.TYPE_VIEW_HOVER_ENTER); 10135 mSendingHoverAccessibilityEvents = true; 10136 } 10137 } else { 10138 if (action == MotionEvent.ACTION_HOVER_EXIT 10139 || (action == MotionEvent.ACTION_MOVE 10140 && !pointInView(event.getX(), event.getY()))) { 10141 mSendingHoverAccessibilityEvents = false; 10142 sendAccessibilityHoverEvent(AccessibilityEvent.TYPE_VIEW_HOVER_EXIT); 10143 } 10144 } 10145 10146 if (isHoverable()) { 10147 switch (action) { 10148 case MotionEvent.ACTION_HOVER_ENTER: 10149 setHovered(true); 10150 break; 10151 case MotionEvent.ACTION_HOVER_EXIT: 10152 setHovered(false); 10153 break; 10154 } 10155 10156 // Dispatch the event to onGenericMotionEvent before returning true. 10157 // This is to provide compatibility with existing applications that 10158 // handled HOVER_MOVE events in onGenericMotionEvent and that would 10159 // break because of the new default handling for hoverable views 10160 // in onHoverEvent. 10161 // Note that onGenericMotionEvent will be called by default when 10162 // onHoverEvent returns false (refer to dispatchGenericMotionEvent). 10163 dispatchGenericMotionEventInternal(event); 10164 // The event was already handled by calling setHovered(), so always 10165 // return true. 10166 return true; 10167 } 10168 10169 return false; 10170 } 10171 10172 /** 10173 * Returns true if the view should handle {@link #onHoverEvent} 10174 * by calling {@link #setHovered} to change its hovered state. 10175 * 10176 * @return True if the view is hoverable. 10177 */ 10178 private boolean isHoverable() { 10179 final int viewFlags = mViewFlags; 10180 if ((viewFlags & ENABLED_MASK) == DISABLED) { 10181 return false; 10182 } 10183 10184 return (viewFlags & CLICKABLE) == CLICKABLE 10185 || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE 10186 || (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE; 10187 } 10188 10189 /** 10190 * Returns true if the view is currently hovered. 10191 * 10192 * @return True if the view is currently hovered. 10193 * 10194 * @see #setHovered 10195 * @see #onHoverChanged 10196 */ 10197 @ViewDebug.ExportedProperty 10198 public boolean isHovered() { 10199 return (mPrivateFlags & PFLAG_HOVERED) != 0; 10200 } 10201 10202 /** 10203 * Sets whether the view is currently hovered. 10204 * <p> 10205 * Calling this method also changes the drawable state of the view. This 10206 * enables the view to react to hover by using different drawable resources 10207 * to change its appearance. 10208 * </p><p> 10209 * The {@link #onHoverChanged} method is called when the hovered state changes. 10210 * </p> 10211 * 10212 * @param hovered True if the view is hovered. 10213 * 10214 * @see #isHovered 10215 * @see #onHoverChanged 10216 */ 10217 public void setHovered(boolean hovered) { 10218 if (hovered) { 10219 if ((mPrivateFlags & PFLAG_HOVERED) == 0) { 10220 mPrivateFlags |= PFLAG_HOVERED; 10221 refreshDrawableState(); 10222 onHoverChanged(true); 10223 } 10224 } else { 10225 if ((mPrivateFlags & PFLAG_HOVERED) != 0) { 10226 mPrivateFlags &= ~PFLAG_HOVERED; 10227 refreshDrawableState(); 10228 onHoverChanged(false); 10229 } 10230 } 10231 } 10232 10233 /** 10234 * Implement this method to handle hover state changes. 10235 * <p> 10236 * This method is called whenever the hover state changes as a result of a 10237 * call to {@link #setHovered}. 10238 * </p> 10239 * 10240 * @param hovered The current hover state, as returned by {@link #isHovered}. 10241 * 10242 * @see #isHovered 10243 * @see #setHovered 10244 */ 10245 public void onHoverChanged(boolean hovered) { 10246 } 10247 10248 /** 10249 * Implement this method to handle touch screen motion events. 10250 * <p> 10251 * If this method is used to detect click actions, it is recommended that 10252 * the actions be performed by implementing and calling 10253 * {@link #performClick()}. This will ensure consistent system behavior, 10254 * including: 10255 * <ul> 10256 * <li>obeying click sound preferences 10257 * <li>dispatching OnClickListener calls 10258 * <li>handling {@link AccessibilityNodeInfo#ACTION_CLICK ACTION_CLICK} when 10259 * accessibility features are enabled 10260 * </ul> 10261 * 10262 * @param event The motion event. 10263 * @return True if the event was handled, false otherwise. 10264 */ 10265 public boolean onTouchEvent(MotionEvent event) { 10266 final float x = event.getX(); 10267 final float y = event.getY(); 10268 final int viewFlags = mViewFlags; 10269 final int action = event.getAction(); 10270 10271 if ((viewFlags & ENABLED_MASK) == DISABLED) { 10272 if (action == MotionEvent.ACTION_UP && (mPrivateFlags & PFLAG_PRESSED) != 0) { 10273 setPressed(false); 10274 } 10275 // A disabled view that is clickable still consumes the touch 10276 // events, it just doesn't respond to them. 10277 return (((viewFlags & CLICKABLE) == CLICKABLE 10278 || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) 10279 || (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE); 10280 } 10281 10282 if (mTouchDelegate != null) { 10283 if (mTouchDelegate.onTouchEvent(event)) { 10284 return true; 10285 } 10286 } 10287 10288 if (((viewFlags & CLICKABLE) == CLICKABLE || 10289 (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) || 10290 (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE) { 10291 switch (action) { 10292 case MotionEvent.ACTION_UP: 10293 boolean prepressed = (mPrivateFlags & PFLAG_PREPRESSED) != 0; 10294 if ((mPrivateFlags & PFLAG_PRESSED) != 0 || prepressed) { 10295 // take focus if we don't have it already and we should in 10296 // touch mode. 10297 boolean focusTaken = false; 10298 if (isFocusable() && isFocusableInTouchMode() && !isFocused()) { 10299 focusTaken = requestFocus(); 10300 } 10301 10302 if (prepressed) { 10303 // The button is being released before we actually 10304 // showed it as pressed. Make it show the pressed 10305 // state now (before scheduling the click) to ensure 10306 // the user sees it. 10307 setPressed(true, x, y); 10308 } 10309 10310 if (!mHasPerformedLongPress && !mIgnoreNextUpEvent) { 10311 // This is a tap, so remove the longpress check 10312 removeLongPressCallback(); 10313 10314 // Only perform take click actions if we were in the pressed state 10315 if (!focusTaken) { 10316 // Use a Runnable and post this rather than calling 10317 // performClick directly. This lets other visual state 10318 // of the view update before click actions start. 10319 if (mPerformClick == null) { 10320 mPerformClick = new PerformClick(); 10321 } 10322 if (!post(mPerformClick)) { 10323 performClick(); 10324 } 10325 } 10326 } 10327 10328 if (mUnsetPressedState == null) { 10329 mUnsetPressedState = new UnsetPressedState(); 10330 } 10331 10332 if (prepressed) { 10333 postDelayed(mUnsetPressedState, 10334 ViewConfiguration.getPressedStateDuration()); 10335 } else if (!post(mUnsetPressedState)) { 10336 // If the post failed, unpress right now 10337 mUnsetPressedState.run(); 10338 } 10339 10340 removeTapCallback(); 10341 } 10342 mIgnoreNextUpEvent = false; 10343 break; 10344 10345 case MotionEvent.ACTION_DOWN: 10346 mHasPerformedLongPress = false; 10347 10348 if (performButtonActionOnTouchDown(event)) { 10349 break; 10350 } 10351 10352 // Walk up the hierarchy to determine if we're inside a scrolling container. 10353 boolean isInScrollingContainer = isInScrollingContainer(); 10354 10355 // For views inside a scrolling container, delay the pressed feedback for 10356 // a short period in case this is a scroll. 10357 if (isInScrollingContainer) { 10358 mPrivateFlags |= PFLAG_PREPRESSED; 10359 if (mPendingCheckForTap == null) { 10360 mPendingCheckForTap = new CheckForTap(); 10361 } 10362 mPendingCheckForTap.x = event.getX(); 10363 mPendingCheckForTap.y = event.getY(); 10364 postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout()); 10365 } else { 10366 // Not inside a scrolling container, so show the feedback right away 10367 setPressed(true, x, y); 10368 checkForLongClick(0); 10369 } 10370 break; 10371 10372 case MotionEvent.ACTION_CANCEL: 10373 setPressed(false); 10374 removeTapCallback(); 10375 removeLongPressCallback(); 10376 mInContextButtonPress = false; 10377 mHasPerformedLongPress = false; 10378 mIgnoreNextUpEvent = false; 10379 break; 10380 10381 case MotionEvent.ACTION_MOVE: 10382 drawableHotspotChanged(x, y); 10383 10384 // Be lenient about moving outside of buttons 10385 if (!pointInView(x, y, mTouchSlop)) { 10386 // Outside button 10387 removeTapCallback(); 10388 if ((mPrivateFlags & PFLAG_PRESSED) != 0) { 10389 // Remove any future long press/tap checks 10390 removeLongPressCallback(); 10391 10392 setPressed(false); 10393 } 10394 } 10395 break; 10396 } 10397 10398 return true; 10399 } 10400 10401 return false; 10402 } 10403 10404 /** 10405 * @hide 10406 */ 10407 public boolean isInScrollingContainer() { 10408 ViewParent p = getParent(); 10409 while (p != null && p instanceof ViewGroup) { 10410 if (((ViewGroup) p).shouldDelayChildPressedState()) { 10411 return true; 10412 } 10413 p = p.getParent(); 10414 } 10415 return false; 10416 } 10417 10418 /** 10419 * Remove the longpress detection timer. 10420 */ 10421 private void removeLongPressCallback() { 10422 if (mPendingCheckForLongPress != null) { 10423 removeCallbacks(mPendingCheckForLongPress); 10424 } 10425 } 10426 10427 /** 10428 * Remove the pending click action 10429 */ 10430 private void removePerformClickCallback() { 10431 if (mPerformClick != null) { 10432 removeCallbacks(mPerformClick); 10433 } 10434 } 10435 10436 /** 10437 * Remove the prepress detection timer. 10438 */ 10439 private void removeUnsetPressCallback() { 10440 if ((mPrivateFlags & PFLAG_PRESSED) != 0 && mUnsetPressedState != null) { 10441 setPressed(false); 10442 removeCallbacks(mUnsetPressedState); 10443 } 10444 } 10445 10446 /** 10447 * Remove the tap detection timer. 10448 */ 10449 private void removeTapCallback() { 10450 if (mPendingCheckForTap != null) { 10451 mPrivateFlags &= ~PFLAG_PREPRESSED; 10452 removeCallbacks(mPendingCheckForTap); 10453 } 10454 } 10455 10456 /** 10457 * Cancels a pending long press. Your subclass can use this if you 10458 * want the context menu to come up if the user presses and holds 10459 * at the same place, but you don't want it to come up if they press 10460 * and then move around enough to cause scrolling. 10461 */ 10462 public void cancelLongPress() { 10463 removeLongPressCallback(); 10464 10465 /* 10466 * The prepressed state handled by the tap callback is a display 10467 * construct, but the tap callback will post a long press callback 10468 * less its own timeout. Remove it here. 10469 */ 10470 removeTapCallback(); 10471 } 10472 10473 /** 10474 * Remove the pending callback for sending a 10475 * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. 10476 */ 10477 private void removeSendViewScrolledAccessibilityEventCallback() { 10478 if (mSendViewScrolledAccessibilityEvent != null) { 10479 removeCallbacks(mSendViewScrolledAccessibilityEvent); 10480 mSendViewScrolledAccessibilityEvent.mIsPending = false; 10481 } 10482 } 10483 10484 /** 10485 * Sets the TouchDelegate for this View. 10486 */ 10487 public void setTouchDelegate(TouchDelegate delegate) { 10488 mTouchDelegate = delegate; 10489 } 10490 10491 /** 10492 * Gets the TouchDelegate for this View. 10493 */ 10494 public TouchDelegate getTouchDelegate() { 10495 return mTouchDelegate; 10496 } 10497 10498 /** 10499 * Request unbuffered dispatch of the given stream of MotionEvents to this View. 10500 * 10501 * Until this View receives a corresponding {@link MotionEvent#ACTION_UP}, ask that the input 10502 * system not batch {@link MotionEvent}s but instead deliver them as soon as they're 10503 * available. This method should only be called for touch events. 10504 * 10505 * <p class="note">This api is not intended for most applications. Buffered dispatch 10506 * provides many of benefits, and just requesting unbuffered dispatch on most MotionEvent 10507 * streams will not improve your input latency. Side effects include: increased latency, 10508 * jittery scrolls and inability to take advantage of system resampling. Talk to your input 10509 * professional to see if {@link #requestUnbufferedDispatch(MotionEvent)} is right for 10510 * you.</p> 10511 */ 10512 public final void requestUnbufferedDispatch(MotionEvent event) { 10513 final int action = event.getAction(); 10514 if (mAttachInfo == null 10515 || action != MotionEvent.ACTION_DOWN && action != MotionEvent.ACTION_MOVE 10516 || !event.isTouchEvent()) { 10517 return; 10518 } 10519 mAttachInfo.mUnbufferedDispatchRequested = true; 10520 } 10521 10522 /** 10523 * Set flags controlling behavior of this view. 10524 * 10525 * @param flags Constant indicating the value which should be set 10526 * @param mask Constant indicating the bit range that should be changed 10527 */ 10528 void setFlags(int flags, int mask) { 10529 final boolean accessibilityEnabled = 10530 AccessibilityManager.getInstance(mContext).isEnabled(); 10531 final boolean oldIncludeForAccessibility = accessibilityEnabled && includeForAccessibility(); 10532 10533 int old = mViewFlags; 10534 mViewFlags = (mViewFlags & ~mask) | (flags & mask); 10535 10536 int changed = mViewFlags ^ old; 10537 if (changed == 0) { 10538 return; 10539 } 10540 int privateFlags = mPrivateFlags; 10541 10542 /* Check if the FOCUSABLE bit has changed */ 10543 if (((changed & FOCUSABLE_MASK) != 0) && 10544 ((privateFlags & PFLAG_HAS_BOUNDS) !=0)) { 10545 if (((old & FOCUSABLE_MASK) == FOCUSABLE) 10546 && ((privateFlags & PFLAG_FOCUSED) != 0)) { 10547 /* Give up focus if we are no longer focusable */ 10548 clearFocus(); 10549 } else if (((old & FOCUSABLE_MASK) == NOT_FOCUSABLE) 10550 && ((privateFlags & PFLAG_FOCUSED) == 0)) { 10551 /* 10552 * Tell the view system that we are now available to take focus 10553 * if no one else already has it. 10554 */ 10555 if (mParent != null) mParent.focusableViewAvailable(this); 10556 } 10557 } 10558 10559 final int newVisibility = flags & VISIBILITY_MASK; 10560 if (newVisibility == VISIBLE) { 10561 if ((changed & VISIBILITY_MASK) != 0) { 10562 /* 10563 * If this view is becoming visible, invalidate it in case it changed while 10564 * it was not visible. Marking it drawn ensures that the invalidation will 10565 * go through. 10566 */ 10567 mPrivateFlags |= PFLAG_DRAWN; 10568 invalidate(true); 10569 10570 needGlobalAttributesUpdate(true); 10571 10572 // a view becoming visible is worth notifying the parent 10573 // about in case nothing has focus. even if this specific view 10574 // isn't focusable, it may contain something that is, so let 10575 // the root view try to give this focus if nothing else does. 10576 if ((mParent != null) && (mBottom > mTop) && (mRight > mLeft)) { 10577 mParent.focusableViewAvailable(this); 10578 } 10579 } 10580 } 10581 10582 /* Check if the GONE bit has changed */ 10583 if ((changed & GONE) != 0) { 10584 needGlobalAttributesUpdate(false); 10585 requestLayout(); 10586 10587 if (((mViewFlags & VISIBILITY_MASK) == GONE)) { 10588 if (hasFocus()) clearFocus(); 10589 clearAccessibilityFocus(); 10590 destroyDrawingCache(); 10591 if (mParent instanceof View) { 10592 // GONE views noop invalidation, so invalidate the parent 10593 ((View) mParent).invalidate(true); 10594 } 10595 // Mark the view drawn to ensure that it gets invalidated properly the next 10596 // time it is visible and gets invalidated 10597 mPrivateFlags |= PFLAG_DRAWN; 10598 } 10599 if (mAttachInfo != null) { 10600 mAttachInfo.mViewVisibilityChanged = true; 10601 } 10602 } 10603 10604 /* Check if the VISIBLE bit has changed */ 10605 if ((changed & INVISIBLE) != 0) { 10606 needGlobalAttributesUpdate(false); 10607 /* 10608 * If this view is becoming invisible, set the DRAWN flag so that 10609 * the next invalidate() will not be skipped. 10610 */ 10611 mPrivateFlags |= PFLAG_DRAWN; 10612 10613 if (((mViewFlags & VISIBILITY_MASK) == INVISIBLE)) { 10614 // root view becoming invisible shouldn't clear focus and accessibility focus 10615 if (getRootView() != this) { 10616 if (hasFocus()) clearFocus(); 10617 clearAccessibilityFocus(); 10618 } 10619 } 10620 if (mAttachInfo != null) { 10621 mAttachInfo.mViewVisibilityChanged = true; 10622 } 10623 } 10624 10625 if ((changed & VISIBILITY_MASK) != 0) { 10626 // If the view is invisible, cleanup its display list to free up resources 10627 if (newVisibility != VISIBLE && mAttachInfo != null) { 10628 cleanupDraw(); 10629 } 10630 10631 if (mParent instanceof ViewGroup) { 10632 ((ViewGroup) mParent).onChildVisibilityChanged(this, 10633 (changed & VISIBILITY_MASK), newVisibility); 10634 ((View) mParent).invalidate(true); 10635 } else if (mParent != null) { 10636 mParent.invalidateChild(this, null); 10637 } 10638 10639 if (mAttachInfo != null) { 10640 dispatchVisibilityChanged(this, newVisibility); 10641 notifySubtreeAccessibilityStateChangedIfNeeded(); 10642 } 10643 } 10644 10645 if ((changed & WILL_NOT_CACHE_DRAWING) != 0) { 10646 destroyDrawingCache(); 10647 } 10648 10649 if ((changed & DRAWING_CACHE_ENABLED) != 0) { 10650 destroyDrawingCache(); 10651 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 10652 invalidateParentCaches(); 10653 } 10654 10655 if ((changed & DRAWING_CACHE_QUALITY_MASK) != 0) { 10656 destroyDrawingCache(); 10657 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 10658 } 10659 10660 if ((changed & DRAW_MASK) != 0) { 10661 if ((mViewFlags & WILL_NOT_DRAW) != 0) { 10662 if (mBackground != null 10663 || (mForegroundInfo != null && mForegroundInfo.mDrawable != null)) { 10664 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 10665 } else { 10666 mPrivateFlags |= PFLAG_SKIP_DRAW; 10667 } 10668 } else { 10669 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 10670 } 10671 requestLayout(); 10672 invalidate(true); 10673 } 10674 10675 if ((changed & KEEP_SCREEN_ON) != 0) { 10676 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 10677 mParent.recomputeViewAttributes(this); 10678 } 10679 } 10680 10681 if (accessibilityEnabled) { 10682 if ((changed & FOCUSABLE_MASK) != 0 || (changed & VISIBILITY_MASK) != 0 10683 || (changed & CLICKABLE) != 0 || (changed & LONG_CLICKABLE) != 0 10684 || (changed & CONTEXT_CLICKABLE) != 0) { 10685 if (oldIncludeForAccessibility != includeForAccessibility()) { 10686 notifySubtreeAccessibilityStateChangedIfNeeded(); 10687 } else { 10688 notifyViewAccessibilityStateChangedIfNeeded( 10689 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 10690 } 10691 } else if ((changed & ENABLED_MASK) != 0) { 10692 notifyViewAccessibilityStateChangedIfNeeded( 10693 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 10694 } 10695 } 10696 } 10697 10698 /** 10699 * Change the view's z order in the tree, so it's on top of other sibling 10700 * views. This ordering change may affect layout, if the parent container 10701 * uses an order-dependent layout scheme (e.g., LinearLayout). Prior 10702 * to {@link android.os.Build.VERSION_CODES#KITKAT} this 10703 * method should be followed by calls to {@link #requestLayout()} and 10704 * {@link View#invalidate()} on the view's parent to force the parent to redraw 10705 * with the new child ordering. 10706 * 10707 * @see ViewGroup#bringChildToFront(View) 10708 */ 10709 public void bringToFront() { 10710 if (mParent != null) { 10711 mParent.bringChildToFront(this); 10712 } 10713 } 10714 10715 /** 10716 * This is called in response to an internal scroll in this view (i.e., the 10717 * view scrolled its own contents). This is typically as a result of 10718 * {@link #scrollBy(int, int)} or {@link #scrollTo(int, int)} having been 10719 * called. 10720 * 10721 * @param l Current horizontal scroll origin. 10722 * @param t Current vertical scroll origin. 10723 * @param oldl Previous horizontal scroll origin. 10724 * @param oldt Previous vertical scroll origin. 10725 */ 10726 protected void onScrollChanged(int l, int t, int oldl, int oldt) { 10727 notifySubtreeAccessibilityStateChangedIfNeeded(); 10728 10729 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 10730 postSendViewScrolledAccessibilityEventCallback(); 10731 } 10732 10733 mBackgroundSizeChanged = true; 10734 if (mForegroundInfo != null) { 10735 mForegroundInfo.mBoundsChanged = true; 10736 } 10737 10738 final AttachInfo ai = mAttachInfo; 10739 if (ai != null) { 10740 ai.mViewScrollChanged = true; 10741 } 10742 10743 if (mListenerInfo != null && mListenerInfo.mOnScrollChangeListener != null) { 10744 mListenerInfo.mOnScrollChangeListener.onScrollChange(this, l, t, oldl, oldt); 10745 } 10746 } 10747 10748 /** 10749 * Interface definition for a callback to be invoked when the scroll 10750 * X or Y positions of a view change. 10751 * <p> 10752 * <b>Note:</b> Some views handle scrolling independently from View and may 10753 * have their own separate listeners for scroll-type events. For example, 10754 * {@link android.widget.ListView ListView} allows clients to register an 10755 * {@link android.widget.ListView#setOnScrollListener(android.widget.AbsListView.OnScrollListener) AbsListView.OnScrollListener} 10756 * to listen for changes in list scroll position. 10757 * 10758 * @see #setOnScrollChangeListener(View.OnScrollChangeListener) 10759 */ 10760 public interface OnScrollChangeListener { 10761 /** 10762 * Called when the scroll position of a view changes. 10763 * 10764 * @param v The view whose scroll position has changed. 10765 * @param scrollX Current horizontal scroll origin. 10766 * @param scrollY Current vertical scroll origin. 10767 * @param oldScrollX Previous horizontal scroll origin. 10768 * @param oldScrollY Previous vertical scroll origin. 10769 */ 10770 void onScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY); 10771 } 10772 10773 /** 10774 * Interface definition for a callback to be invoked when the layout bounds of a view 10775 * changes due to layout processing. 10776 */ 10777 public interface OnLayoutChangeListener { 10778 /** 10779 * Called when the layout bounds of a view changes due to layout processing. 10780 * 10781 * @param v The view whose bounds have changed. 10782 * @param left The new value of the view's left property. 10783 * @param top The new value of the view's top property. 10784 * @param right The new value of the view's right property. 10785 * @param bottom The new value of the view's bottom property. 10786 * @param oldLeft The previous value of the view's left property. 10787 * @param oldTop The previous value of the view's top property. 10788 * @param oldRight The previous value of the view's right property. 10789 * @param oldBottom The previous value of the view's bottom property. 10790 */ 10791 void onLayoutChange(View v, int left, int top, int right, int bottom, 10792 int oldLeft, int oldTop, int oldRight, int oldBottom); 10793 } 10794 10795 /** 10796 * This is called during layout when the size of this view has changed. If 10797 * you were just added to the view hierarchy, you're called with the old 10798 * values of 0. 10799 * 10800 * @param w Current width of this view. 10801 * @param h Current height of this view. 10802 * @param oldw Old width of this view. 10803 * @param oldh Old height of this view. 10804 */ 10805 protected void onSizeChanged(int w, int h, int oldw, int oldh) { 10806 } 10807 10808 /** 10809 * Called by draw to draw the child views. This may be overridden 10810 * by derived classes to gain control just before its children are drawn 10811 * (but after its own view has been drawn). 10812 * @param canvas the canvas on which to draw the view 10813 */ 10814 protected void dispatchDraw(Canvas canvas) { 10815 10816 } 10817 10818 /** 10819 * Gets the parent of this view. Note that the parent is a 10820 * ViewParent and not necessarily a View. 10821 * 10822 * @return Parent of this view. 10823 */ 10824 public final ViewParent getParent() { 10825 return mParent; 10826 } 10827 10828 /** 10829 * Set the horizontal scrolled position of your view. This will cause a call to 10830 * {@link #onScrollChanged(int, int, int, int)} and the view will be 10831 * invalidated. 10832 * @param value the x position to scroll to 10833 */ 10834 public void setScrollX(int value) { 10835 scrollTo(value, mScrollY); 10836 } 10837 10838 /** 10839 * Set the vertical scrolled position of your view. This will cause a call to 10840 * {@link #onScrollChanged(int, int, int, int)} and the view will be 10841 * invalidated. 10842 * @param value the y position to scroll to 10843 */ 10844 public void setScrollY(int value) { 10845 scrollTo(mScrollX, value); 10846 } 10847 10848 /** 10849 * Return the scrolled left position of this view. This is the left edge of 10850 * the displayed part of your view. You do not need to draw any pixels 10851 * farther left, since those are outside of the frame of your view on 10852 * screen. 10853 * 10854 * @return The left edge of the displayed part of your view, in pixels. 10855 */ 10856 public final int getScrollX() { 10857 return mScrollX; 10858 } 10859 10860 /** 10861 * Return the scrolled top position of this view. This is the top edge of 10862 * the displayed part of your view. You do not need to draw any pixels above 10863 * it, since those are outside of the frame of your view on screen. 10864 * 10865 * @return The top edge of the displayed part of your view, in pixels. 10866 */ 10867 public final int getScrollY() { 10868 return mScrollY; 10869 } 10870 10871 /** 10872 * Return the width of the your view. 10873 * 10874 * @return The width of your view, in pixels. 10875 */ 10876 @ViewDebug.ExportedProperty(category = "layout") 10877 public final int getWidth() { 10878 return mRight - mLeft; 10879 } 10880 10881 /** 10882 * Return the height of your view. 10883 * 10884 * @return The height of your view, in pixels. 10885 */ 10886 @ViewDebug.ExportedProperty(category = "layout") 10887 public final int getHeight() { 10888 return mBottom - mTop; 10889 } 10890 10891 /** 10892 * Return the visible drawing bounds of your view. Fills in the output 10893 * rectangle with the values from getScrollX(), getScrollY(), 10894 * getWidth(), and getHeight(). These bounds do not account for any 10895 * transformation properties currently set on the view, such as 10896 * {@link #setScaleX(float)} or {@link #setRotation(float)}. 10897 * 10898 * @param outRect The (scrolled) drawing bounds of the view. 10899 */ 10900 public void getDrawingRect(Rect outRect) { 10901 outRect.left = mScrollX; 10902 outRect.top = mScrollY; 10903 outRect.right = mScrollX + (mRight - mLeft); 10904 outRect.bottom = mScrollY + (mBottom - mTop); 10905 } 10906 10907 /** 10908 * Like {@link #getMeasuredWidthAndState()}, but only returns the 10909 * raw width component (that is the result is masked by 10910 * {@link #MEASURED_SIZE_MASK}). 10911 * 10912 * @return The raw measured width of this view. 10913 */ 10914 public final int getMeasuredWidth() { 10915 return mMeasuredWidth & MEASURED_SIZE_MASK; 10916 } 10917 10918 /** 10919 * Return the full width measurement information for this view as computed 10920 * by the most recent call to {@link #measure(int, int)}. This result is a bit mask 10921 * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 10922 * This should be used during measurement and layout calculations only. Use 10923 * {@link #getWidth()} to see how wide a view is after layout. 10924 * 10925 * @return The measured width of this view as a bit mask. 10926 */ 10927 @ViewDebug.ExportedProperty(category = "measurement", flagMapping = { 10928 @ViewDebug.FlagToString(mask = MEASURED_STATE_MASK, equals = MEASURED_STATE_TOO_SMALL, 10929 name = "MEASURED_STATE_TOO_SMALL"), 10930 }) 10931 public final int getMeasuredWidthAndState() { 10932 return mMeasuredWidth; 10933 } 10934 10935 /** 10936 * Like {@link #getMeasuredHeightAndState()}, but only returns the 10937 * raw width component (that is the result is masked by 10938 * {@link #MEASURED_SIZE_MASK}). 10939 * 10940 * @return The raw measured height of this view. 10941 */ 10942 public final int getMeasuredHeight() { 10943 return mMeasuredHeight & MEASURED_SIZE_MASK; 10944 } 10945 10946 /** 10947 * Return the full height measurement information for this view as computed 10948 * by the most recent call to {@link #measure(int, int)}. This result is a bit mask 10949 * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. 10950 * This should be used during measurement and layout calculations only. Use 10951 * {@link #getHeight()} to see how wide a view is after layout. 10952 * 10953 * @return The measured width of this view as a bit mask. 10954 */ 10955 @ViewDebug.ExportedProperty(category = "measurement", flagMapping = { 10956 @ViewDebug.FlagToString(mask = MEASURED_STATE_MASK, equals = MEASURED_STATE_TOO_SMALL, 10957 name = "MEASURED_STATE_TOO_SMALL"), 10958 }) 10959 public final int getMeasuredHeightAndState() { 10960 return mMeasuredHeight; 10961 } 10962 10963 /** 10964 * Return only the state bits of {@link #getMeasuredWidthAndState()} 10965 * and {@link #getMeasuredHeightAndState()}, combined into one integer. 10966 * The width component is in the regular bits {@link #MEASURED_STATE_MASK} 10967 * and the height component is at the shifted bits 10968 * {@link #MEASURED_HEIGHT_STATE_SHIFT}>>{@link #MEASURED_STATE_MASK}. 10969 */ 10970 public final int getMeasuredState() { 10971 return (mMeasuredWidth&MEASURED_STATE_MASK) 10972 | ((mMeasuredHeight>>MEASURED_HEIGHT_STATE_SHIFT) 10973 & (MEASURED_STATE_MASK>>MEASURED_HEIGHT_STATE_SHIFT)); 10974 } 10975 10976 /** 10977 * The transform matrix of this view, which is calculated based on the current 10978 * rotation, scale, and pivot properties. 10979 * 10980 * @see #getRotation() 10981 * @see #getScaleX() 10982 * @see #getScaleY() 10983 * @see #getPivotX() 10984 * @see #getPivotY() 10985 * @return The current transform matrix for the view 10986 */ 10987 public Matrix getMatrix() { 10988 ensureTransformationInfo(); 10989 final Matrix matrix = mTransformationInfo.mMatrix; 10990 mRenderNode.getMatrix(matrix); 10991 return matrix; 10992 } 10993 10994 /** 10995 * Returns true if the transform matrix is the identity matrix. 10996 * Recomputes the matrix if necessary. 10997 * 10998 * @return True if the transform matrix is the identity matrix, false otherwise. 10999 */ 11000 final boolean hasIdentityMatrix() { 11001 return mRenderNode.hasIdentityMatrix(); 11002 } 11003 11004 void ensureTransformationInfo() { 11005 if (mTransformationInfo == null) { 11006 mTransformationInfo = new TransformationInfo(); 11007 } 11008 } 11009 11010 /** 11011 * Utility method to retrieve the inverse of the current mMatrix property. 11012 * We cache the matrix to avoid recalculating it when transform properties 11013 * have not changed. 11014 * 11015 * @return The inverse of the current matrix of this view. 11016 * @hide 11017 */ 11018 public final Matrix getInverseMatrix() { 11019 ensureTransformationInfo(); 11020 if (mTransformationInfo.mInverseMatrix == null) { 11021 mTransformationInfo.mInverseMatrix = new Matrix(); 11022 } 11023 final Matrix matrix = mTransformationInfo.mInverseMatrix; 11024 mRenderNode.getInverseMatrix(matrix); 11025 return matrix; 11026 } 11027 11028 /** 11029 * Gets the distance along the Z axis from the camera to this view. 11030 * 11031 * @see #setCameraDistance(float) 11032 * 11033 * @return The distance along the Z axis. 11034 */ 11035 public float getCameraDistance() { 11036 final float dpi = mResources.getDisplayMetrics().densityDpi; 11037 return -(mRenderNode.getCameraDistance() * dpi); 11038 } 11039 11040 /** 11041 * <p>Sets the distance along the Z axis (orthogonal to the X/Y plane on which 11042 * views are drawn) from the camera to this view. The camera's distance 11043 * affects 3D transformations, for instance rotations around the X and Y 11044 * axis. If the rotationX or rotationY properties are changed and this view is 11045 * large (more than half the size of the screen), it is recommended to always 11046 * use a camera distance that's greater than the height (X axis rotation) or 11047 * the width (Y axis rotation) of this view.</p> 11048 * 11049 * <p>The distance of the camera from the view plane can have an affect on the 11050 * perspective distortion of the view when it is rotated around the x or y axis. 11051 * For example, a large distance will result in a large viewing angle, and there 11052 * will not be much perspective distortion of the view as it rotates. A short 11053 * distance may cause much more perspective distortion upon rotation, and can 11054 * also result in some drawing artifacts if the rotated view ends up partially 11055 * behind the camera (which is why the recommendation is to use a distance at 11056 * least as far as the size of the view, if the view is to be rotated.)</p> 11057 * 11058 * <p>The distance is expressed in "depth pixels." The default distance depends 11059 * on the screen density. For instance, on a medium density display, the 11060 * default distance is 1280. On a high density display, the default distance 11061 * is 1920.</p> 11062 * 11063 * <p>If you want to specify a distance that leads to visually consistent 11064 * results across various densities, use the following formula:</p> 11065 * <pre> 11066 * float scale = context.getResources().getDisplayMetrics().density; 11067 * view.setCameraDistance(distance * scale); 11068 * </pre> 11069 * 11070 * <p>The density scale factor of a high density display is 1.5, 11071 * and 1920 = 1280 * 1.5.</p> 11072 * 11073 * @param distance The distance in "depth pixels", if negative the opposite 11074 * value is used 11075 * 11076 * @see #setRotationX(float) 11077 * @see #setRotationY(float) 11078 */ 11079 public void setCameraDistance(float distance) { 11080 final float dpi = mResources.getDisplayMetrics().densityDpi; 11081 11082 invalidateViewProperty(true, false); 11083 mRenderNode.setCameraDistance(-Math.abs(distance) / dpi); 11084 invalidateViewProperty(false, false); 11085 11086 invalidateParentIfNeededAndWasQuickRejected(); 11087 } 11088 11089 /** 11090 * The degrees that the view is rotated around the pivot point. 11091 * 11092 * @see #setRotation(float) 11093 * @see #getPivotX() 11094 * @see #getPivotY() 11095 * 11096 * @return The degrees of rotation. 11097 */ 11098 @ViewDebug.ExportedProperty(category = "drawing") 11099 public float getRotation() { 11100 return mRenderNode.getRotation(); 11101 } 11102 11103 /** 11104 * Sets the degrees that the view is rotated around the pivot point. Increasing values 11105 * result in clockwise rotation. 11106 * 11107 * @param rotation The degrees of rotation. 11108 * 11109 * @see #getRotation() 11110 * @see #getPivotX() 11111 * @see #getPivotY() 11112 * @see #setRotationX(float) 11113 * @see #setRotationY(float) 11114 * 11115 * @attr ref android.R.styleable#View_rotation 11116 */ 11117 public void setRotation(float rotation) { 11118 if (rotation != getRotation()) { 11119 // Double-invalidation is necessary to capture view's old and new areas 11120 invalidateViewProperty(true, false); 11121 mRenderNode.setRotation(rotation); 11122 invalidateViewProperty(false, true); 11123 11124 invalidateParentIfNeededAndWasQuickRejected(); 11125 notifySubtreeAccessibilityStateChangedIfNeeded(); 11126 } 11127 } 11128 11129 /** 11130 * The degrees that the view is rotated around the vertical axis through the pivot point. 11131 * 11132 * @see #getPivotX() 11133 * @see #getPivotY() 11134 * @see #setRotationY(float) 11135 * 11136 * @return The degrees of Y rotation. 11137 */ 11138 @ViewDebug.ExportedProperty(category = "drawing") 11139 public float getRotationY() { 11140 return mRenderNode.getRotationY(); 11141 } 11142 11143 /** 11144 * Sets the degrees that the view is rotated around the vertical axis through the pivot point. 11145 * Increasing values result in counter-clockwise rotation from the viewpoint of looking 11146 * down the y axis. 11147 * 11148 * When rotating large views, it is recommended to adjust the camera distance 11149 * accordingly. Refer to {@link #setCameraDistance(float)} for more information. 11150 * 11151 * @param rotationY The degrees of Y rotation. 11152 * 11153 * @see #getRotationY() 11154 * @see #getPivotX() 11155 * @see #getPivotY() 11156 * @see #setRotation(float) 11157 * @see #setRotationX(float) 11158 * @see #setCameraDistance(float) 11159 * 11160 * @attr ref android.R.styleable#View_rotationY 11161 */ 11162 public void setRotationY(float rotationY) { 11163 if (rotationY != getRotationY()) { 11164 invalidateViewProperty(true, false); 11165 mRenderNode.setRotationY(rotationY); 11166 invalidateViewProperty(false, true); 11167 11168 invalidateParentIfNeededAndWasQuickRejected(); 11169 notifySubtreeAccessibilityStateChangedIfNeeded(); 11170 } 11171 } 11172 11173 /** 11174 * The degrees that the view is rotated around the horizontal axis through the pivot point. 11175 * 11176 * @see #getPivotX() 11177 * @see #getPivotY() 11178 * @see #setRotationX(float) 11179 * 11180 * @return The degrees of X rotation. 11181 */ 11182 @ViewDebug.ExportedProperty(category = "drawing") 11183 public float getRotationX() { 11184 return mRenderNode.getRotationX(); 11185 } 11186 11187 /** 11188 * Sets the degrees that the view is rotated around the horizontal axis through the pivot point. 11189 * Increasing values result in clockwise rotation from the viewpoint of looking down the 11190 * x axis. 11191 * 11192 * When rotating large views, it is recommended to adjust the camera distance 11193 * accordingly. Refer to {@link #setCameraDistance(float)} for more information. 11194 * 11195 * @param rotationX The degrees of X rotation. 11196 * 11197 * @see #getRotationX() 11198 * @see #getPivotX() 11199 * @see #getPivotY() 11200 * @see #setRotation(float) 11201 * @see #setRotationY(float) 11202 * @see #setCameraDistance(float) 11203 * 11204 * @attr ref android.R.styleable#View_rotationX 11205 */ 11206 public void setRotationX(float rotationX) { 11207 if (rotationX != getRotationX()) { 11208 invalidateViewProperty(true, false); 11209 mRenderNode.setRotationX(rotationX); 11210 invalidateViewProperty(false, true); 11211 11212 invalidateParentIfNeededAndWasQuickRejected(); 11213 notifySubtreeAccessibilityStateChangedIfNeeded(); 11214 } 11215 } 11216 11217 /** 11218 * The amount that the view is scaled in x around the pivot point, as a proportion of 11219 * the view's unscaled width. A value of 1, the default, means that no scaling is applied. 11220 * 11221 * <p>By default, this is 1.0f. 11222 * 11223 * @see #getPivotX() 11224 * @see #getPivotY() 11225 * @return The scaling factor. 11226 */ 11227 @ViewDebug.ExportedProperty(category = "drawing") 11228 public float getScaleX() { 11229 return mRenderNode.getScaleX(); 11230 } 11231 11232 /** 11233 * Sets the amount that the view is scaled in x around the pivot point, as a proportion of 11234 * the view's unscaled width. A value of 1 means that no scaling is applied. 11235 * 11236 * @param scaleX The scaling factor. 11237 * @see #getPivotX() 11238 * @see #getPivotY() 11239 * 11240 * @attr ref android.R.styleable#View_scaleX 11241 */ 11242 public void setScaleX(float scaleX) { 11243 if (scaleX != getScaleX()) { 11244 invalidateViewProperty(true, false); 11245 mRenderNode.setScaleX(scaleX); 11246 invalidateViewProperty(false, true); 11247 11248 invalidateParentIfNeededAndWasQuickRejected(); 11249 notifySubtreeAccessibilityStateChangedIfNeeded(); 11250 } 11251 } 11252 11253 /** 11254 * The amount that the view is scaled in y around the pivot point, as a proportion of 11255 * the view's unscaled height. A value of 1, the default, means that no scaling is applied. 11256 * 11257 * <p>By default, this is 1.0f. 11258 * 11259 * @see #getPivotX() 11260 * @see #getPivotY() 11261 * @return The scaling factor. 11262 */ 11263 @ViewDebug.ExportedProperty(category = "drawing") 11264 public float getScaleY() { 11265 return mRenderNode.getScaleY(); 11266 } 11267 11268 /** 11269 * Sets the amount that the view is scaled in Y around the pivot point, as a proportion of 11270 * the view's unscaled width. A value of 1 means that no scaling is applied. 11271 * 11272 * @param scaleY The scaling factor. 11273 * @see #getPivotX() 11274 * @see #getPivotY() 11275 * 11276 * @attr ref android.R.styleable#View_scaleY 11277 */ 11278 public void setScaleY(float scaleY) { 11279 if (scaleY != getScaleY()) { 11280 invalidateViewProperty(true, false); 11281 mRenderNode.setScaleY(scaleY); 11282 invalidateViewProperty(false, true); 11283 11284 invalidateParentIfNeededAndWasQuickRejected(); 11285 notifySubtreeAccessibilityStateChangedIfNeeded(); 11286 } 11287 } 11288 11289 /** 11290 * The x location of the point around which the view is {@link #setRotation(float) rotated} 11291 * and {@link #setScaleX(float) scaled}. 11292 * 11293 * @see #getRotation() 11294 * @see #getScaleX() 11295 * @see #getScaleY() 11296 * @see #getPivotY() 11297 * @return The x location of the pivot point. 11298 * 11299 * @attr ref android.R.styleable#View_transformPivotX 11300 */ 11301 @ViewDebug.ExportedProperty(category = "drawing") 11302 public float getPivotX() { 11303 return mRenderNode.getPivotX(); 11304 } 11305 11306 /** 11307 * Sets the x location of the point around which the view is 11308 * {@link #setRotation(float) rotated} and {@link #setScaleX(float) scaled}. 11309 * By default, the pivot point is centered on the object. 11310 * Setting this property disables this behavior and causes the view to use only the 11311 * explicitly set pivotX and pivotY values. 11312 * 11313 * @param pivotX The x location of the pivot point. 11314 * @see #getRotation() 11315 * @see #getScaleX() 11316 * @see #getScaleY() 11317 * @see #getPivotY() 11318 * 11319 * @attr ref android.R.styleable#View_transformPivotX 11320 */ 11321 public void setPivotX(float pivotX) { 11322 if (!mRenderNode.isPivotExplicitlySet() || pivotX != getPivotX()) { 11323 invalidateViewProperty(true, false); 11324 mRenderNode.setPivotX(pivotX); 11325 invalidateViewProperty(false, true); 11326 11327 invalidateParentIfNeededAndWasQuickRejected(); 11328 } 11329 } 11330 11331 /** 11332 * The y location of the point around which the view is {@link #setRotation(float) rotated} 11333 * and {@link #setScaleY(float) scaled}. 11334 * 11335 * @see #getRotation() 11336 * @see #getScaleX() 11337 * @see #getScaleY() 11338 * @see #getPivotY() 11339 * @return The y location of the pivot point. 11340 * 11341 * @attr ref android.R.styleable#View_transformPivotY 11342 */ 11343 @ViewDebug.ExportedProperty(category = "drawing") 11344 public float getPivotY() { 11345 return mRenderNode.getPivotY(); 11346 } 11347 11348 /** 11349 * Sets the y location of the point around which the view is {@link #setRotation(float) rotated} 11350 * and {@link #setScaleY(float) scaled}. By default, the pivot point is centered on the object. 11351 * Setting this property disables this behavior and causes the view to use only the 11352 * explicitly set pivotX and pivotY values. 11353 * 11354 * @param pivotY The y location of the pivot point. 11355 * @see #getRotation() 11356 * @see #getScaleX() 11357 * @see #getScaleY() 11358 * @see #getPivotY() 11359 * 11360 * @attr ref android.R.styleable#View_transformPivotY 11361 */ 11362 public void setPivotY(float pivotY) { 11363 if (!mRenderNode.isPivotExplicitlySet() || pivotY != getPivotY()) { 11364 invalidateViewProperty(true, false); 11365 mRenderNode.setPivotY(pivotY); 11366 invalidateViewProperty(false, true); 11367 11368 invalidateParentIfNeededAndWasQuickRejected(); 11369 } 11370 } 11371 11372 /** 11373 * The opacity of the view. This is a value from 0 to 1, where 0 means the view is 11374 * completely transparent and 1 means the view is completely opaque. 11375 * 11376 * <p>By default this is 1.0f. 11377 * @return The opacity of the view. 11378 */ 11379 @ViewDebug.ExportedProperty(category = "drawing") 11380 public float getAlpha() { 11381 return mTransformationInfo != null ? mTransformationInfo.mAlpha : 1; 11382 } 11383 11384 /** 11385 * Returns whether this View has content which overlaps. 11386 * 11387 * <p>This function, intended to be overridden by specific View types, is an optimization when 11388 * alpha is set on a view. If rendering overlaps in a view with alpha < 1, that view is drawn to 11389 * an offscreen buffer and then composited into place, which can be expensive. If the view has 11390 * no overlapping rendering, the view can draw each primitive with the appropriate alpha value 11391 * directly. An example of overlapping rendering is a TextView with a background image, such as 11392 * a Button. An example of non-overlapping rendering is a TextView with no background, or an 11393 * ImageView with only the foreground image. The default implementation returns true; subclasses 11394 * should override if they have cases which can be optimized.</p> 11395 * 11396 * <p>The current implementation of the saveLayer and saveLayerAlpha methods in {@link Canvas} 11397 * necessitates that a View return true if it uses the methods internally without passing the 11398 * {@link Canvas#CLIP_TO_LAYER_SAVE_FLAG}.</p> 11399 * 11400 * @return true if the content in this view might overlap, false otherwise. 11401 */ 11402 @ViewDebug.ExportedProperty(category = "drawing") 11403 public boolean hasOverlappingRendering() { 11404 return true; 11405 } 11406 11407 /** 11408 * Sets the opacity of the view to a value from 0 to 1, where 0 means the view is 11409 * completely transparent and 1 means the view is completely opaque. 11410 * 11411 * <p class="note"><strong>Note:</strong> setting alpha to a translucent value (0 < alpha < 1) 11412 * can have significant performance implications, especially for large views. It is best to use 11413 * the alpha property sparingly and transiently, as in the case of fading animations.</p> 11414 * 11415 * <p>For a view with a frequently changing alpha, such as during a fading animation, it is 11416 * strongly recommended for performance reasons to either override 11417 * {@link #hasOverlappingRendering()} to return <code>false</code> if appropriate, or setting a 11418 * {@link #setLayerType(int, android.graphics.Paint) layer type} on the view for the duration 11419 * of the animation. On versions {@link android.os.Build.VERSION_CODES#M} and below, 11420 * the default path for rendering an unlayered View with alpha could add multiple milliseconds 11421 * of rendering cost, even for simple or small views. Starting with 11422 * {@link android.os.Build.VERSION_CODES#M}, {@link #LAYER_TYPE_HARDWARE} is automatically 11423 * applied to the view at the rendering level.</p> 11424 * 11425 * <p>If this view overrides {@link #onSetAlpha(int)} to return true, then this view is 11426 * responsible for applying the opacity itself.</p> 11427 * 11428 * <p>On versions {@link android.os.Build.VERSION_CODES#LOLLIPOP_MR1} and below, note that if 11429 * the view is backed by a {@link #setLayerType(int, android.graphics.Paint) layer} and is 11430 * associated with a {@link #setLayerPaint(android.graphics.Paint) layer paint}, setting an 11431 * alpha value less than 1.0 will supersede the alpha of the layer paint.</p> 11432 * 11433 * <p>Starting with {@link android.os.Build.VERSION_CODES#M}, setting a translucent alpha 11434 * value will clip a View to its bounds, unless the View returns <code>false</code> from 11435 * {@link #hasOverlappingRendering}.</p> 11436 * 11437 * @param alpha The opacity of the view. 11438 * 11439 * @see #hasOverlappingRendering() 11440 * @see #setLayerType(int, android.graphics.Paint) 11441 * 11442 * @attr ref android.R.styleable#View_alpha 11443 */ 11444 public void setAlpha(@FloatRange(from=0.0, to=1.0) float alpha) { 11445 ensureTransformationInfo(); 11446 if (mTransformationInfo.mAlpha != alpha) { 11447 mTransformationInfo.mAlpha = alpha; 11448 if (onSetAlpha((int) (alpha * 255))) { 11449 mPrivateFlags |= PFLAG_ALPHA_SET; 11450 // subclass is handling alpha - don't optimize rendering cache invalidation 11451 invalidateParentCaches(); 11452 invalidate(true); 11453 } else { 11454 mPrivateFlags &= ~PFLAG_ALPHA_SET; 11455 invalidateViewProperty(true, false); 11456 mRenderNode.setAlpha(getFinalAlpha()); 11457 notifyViewAccessibilityStateChangedIfNeeded( 11458 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 11459 } 11460 } 11461 } 11462 11463 /** 11464 * Faster version of setAlpha() which performs the same steps except there are 11465 * no calls to invalidate(). The caller of this function should perform proper invalidation 11466 * on the parent and this object. The return value indicates whether the subclass handles 11467 * alpha (the return value for onSetAlpha()). 11468 * 11469 * @param alpha The new value for the alpha property 11470 * @return true if the View subclass handles alpha (the return value for onSetAlpha()) and 11471 * the new value for the alpha property is different from the old value 11472 */ 11473 boolean setAlphaNoInvalidation(float alpha) { 11474 ensureTransformationInfo(); 11475 if (mTransformationInfo.mAlpha != alpha) { 11476 mTransformationInfo.mAlpha = alpha; 11477 boolean subclassHandlesAlpha = onSetAlpha((int) (alpha * 255)); 11478 if (subclassHandlesAlpha) { 11479 mPrivateFlags |= PFLAG_ALPHA_SET; 11480 return true; 11481 } else { 11482 mPrivateFlags &= ~PFLAG_ALPHA_SET; 11483 mRenderNode.setAlpha(getFinalAlpha()); 11484 } 11485 } 11486 return false; 11487 } 11488 11489 /** 11490 * This property is hidden and intended only for use by the Fade transition, which 11491 * animates it to produce a visual translucency that does not side-effect (or get 11492 * affected by) the real alpha property. This value is composited with the other 11493 * alpha value (and the AlphaAnimation value, when that is present) to produce 11494 * a final visual translucency result, which is what is passed into the DisplayList. 11495 * 11496 * @hide 11497 */ 11498 public void setTransitionAlpha(float alpha) { 11499 ensureTransformationInfo(); 11500 if (mTransformationInfo.mTransitionAlpha != alpha) { 11501 mTransformationInfo.mTransitionAlpha = alpha; 11502 mPrivateFlags &= ~PFLAG_ALPHA_SET; 11503 invalidateViewProperty(true, false); 11504 mRenderNode.setAlpha(getFinalAlpha()); 11505 } 11506 } 11507 11508 /** 11509 * Calculates the visual alpha of this view, which is a combination of the actual 11510 * alpha value and the transitionAlpha value (if set). 11511 */ 11512 private float getFinalAlpha() { 11513 if (mTransformationInfo != null) { 11514 return mTransformationInfo.mAlpha * mTransformationInfo.mTransitionAlpha; 11515 } 11516 return 1; 11517 } 11518 11519 /** 11520 * This property is hidden and intended only for use by the Fade transition, which 11521 * animates it to produce a visual translucency that does not side-effect (or get 11522 * affected by) the real alpha property. This value is composited with the other 11523 * alpha value (and the AlphaAnimation value, when that is present) to produce 11524 * a final visual translucency result, which is what is passed into the DisplayList. 11525 * 11526 * @hide 11527 */ 11528 @ViewDebug.ExportedProperty(category = "drawing") 11529 public float getTransitionAlpha() { 11530 return mTransformationInfo != null ? mTransformationInfo.mTransitionAlpha : 1; 11531 } 11532 11533 /** 11534 * Top position of this view relative to its parent. 11535 * 11536 * @return The top of this view, in pixels. 11537 */ 11538 @ViewDebug.CapturedViewProperty 11539 public final int getTop() { 11540 return mTop; 11541 } 11542 11543 /** 11544 * Sets the top position of this view relative to its parent. This method is meant to be called 11545 * by the layout system and should not generally be called otherwise, because the property 11546 * may be changed at any time by the layout. 11547 * 11548 * @param top The top of this view, in pixels. 11549 */ 11550 public final void setTop(int top) { 11551 if (top != mTop) { 11552 final boolean matrixIsIdentity = hasIdentityMatrix(); 11553 if (matrixIsIdentity) { 11554 if (mAttachInfo != null) { 11555 int minTop; 11556 int yLoc; 11557 if (top < mTop) { 11558 minTop = top; 11559 yLoc = top - mTop; 11560 } else { 11561 minTop = mTop; 11562 yLoc = 0; 11563 } 11564 invalidate(0, yLoc, mRight - mLeft, mBottom - minTop); 11565 } 11566 } else { 11567 // Double-invalidation is necessary to capture view's old and new areas 11568 invalidate(true); 11569 } 11570 11571 int width = mRight - mLeft; 11572 int oldHeight = mBottom - mTop; 11573 11574 mTop = top; 11575 mRenderNode.setTop(mTop); 11576 11577 sizeChange(width, mBottom - mTop, width, oldHeight); 11578 11579 if (!matrixIsIdentity) { 11580 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 11581 invalidate(true); 11582 } 11583 mBackgroundSizeChanged = true; 11584 if (mForegroundInfo != null) { 11585 mForegroundInfo.mBoundsChanged = true; 11586 } 11587 invalidateParentIfNeeded(); 11588 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 11589 // View was rejected last time it was drawn by its parent; this may have changed 11590 invalidateParentIfNeeded(); 11591 } 11592 } 11593 } 11594 11595 /** 11596 * Bottom position of this view relative to its parent. 11597 * 11598 * @return The bottom of this view, in pixels. 11599 */ 11600 @ViewDebug.CapturedViewProperty 11601 public final int getBottom() { 11602 return mBottom; 11603 } 11604 11605 /** 11606 * True if this view has changed since the last time being drawn. 11607 * 11608 * @return The dirty state of this view. 11609 */ 11610 public boolean isDirty() { 11611 return (mPrivateFlags & PFLAG_DIRTY_MASK) != 0; 11612 } 11613 11614 /** 11615 * Sets the bottom position of this view relative to its parent. This method is meant to be 11616 * called by the layout system and should not generally be called otherwise, because the 11617 * property may be changed at any time by the layout. 11618 * 11619 * @param bottom The bottom of this view, in pixels. 11620 */ 11621 public final void setBottom(int bottom) { 11622 if (bottom != mBottom) { 11623 final boolean matrixIsIdentity = hasIdentityMatrix(); 11624 if (matrixIsIdentity) { 11625 if (mAttachInfo != null) { 11626 int maxBottom; 11627 if (bottom < mBottom) { 11628 maxBottom = mBottom; 11629 } else { 11630 maxBottom = bottom; 11631 } 11632 invalidate(0, 0, mRight - mLeft, maxBottom - mTop); 11633 } 11634 } else { 11635 // Double-invalidation is necessary to capture view's old and new areas 11636 invalidate(true); 11637 } 11638 11639 int width = mRight - mLeft; 11640 int oldHeight = mBottom - mTop; 11641 11642 mBottom = bottom; 11643 mRenderNode.setBottom(mBottom); 11644 11645 sizeChange(width, mBottom - mTop, width, oldHeight); 11646 11647 if (!matrixIsIdentity) { 11648 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 11649 invalidate(true); 11650 } 11651 mBackgroundSizeChanged = true; 11652 if (mForegroundInfo != null) { 11653 mForegroundInfo.mBoundsChanged = true; 11654 } 11655 invalidateParentIfNeeded(); 11656 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 11657 // View was rejected last time it was drawn by its parent; this may have changed 11658 invalidateParentIfNeeded(); 11659 } 11660 } 11661 } 11662 11663 /** 11664 * Left position of this view relative to its parent. 11665 * 11666 * @return The left edge of this view, in pixels. 11667 */ 11668 @ViewDebug.CapturedViewProperty 11669 public final int getLeft() { 11670 return mLeft; 11671 } 11672 11673 /** 11674 * Sets the left position of this view relative to its parent. This method is meant to be called 11675 * by the layout system and should not generally be called otherwise, because the property 11676 * may be changed at any time by the layout. 11677 * 11678 * @param left The left of this view, in pixels. 11679 */ 11680 public final void setLeft(int left) { 11681 if (left != mLeft) { 11682 final boolean matrixIsIdentity = hasIdentityMatrix(); 11683 if (matrixIsIdentity) { 11684 if (mAttachInfo != null) { 11685 int minLeft; 11686 int xLoc; 11687 if (left < mLeft) { 11688 minLeft = left; 11689 xLoc = left - mLeft; 11690 } else { 11691 minLeft = mLeft; 11692 xLoc = 0; 11693 } 11694 invalidate(xLoc, 0, mRight - minLeft, mBottom - mTop); 11695 } 11696 } else { 11697 // Double-invalidation is necessary to capture view's old and new areas 11698 invalidate(true); 11699 } 11700 11701 int oldWidth = mRight - mLeft; 11702 int height = mBottom - mTop; 11703 11704 mLeft = left; 11705 mRenderNode.setLeft(left); 11706 11707 sizeChange(mRight - mLeft, height, oldWidth, height); 11708 11709 if (!matrixIsIdentity) { 11710 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 11711 invalidate(true); 11712 } 11713 mBackgroundSizeChanged = true; 11714 if (mForegroundInfo != null) { 11715 mForegroundInfo.mBoundsChanged = true; 11716 } 11717 invalidateParentIfNeeded(); 11718 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 11719 // View was rejected last time it was drawn by its parent; this may have changed 11720 invalidateParentIfNeeded(); 11721 } 11722 } 11723 } 11724 11725 /** 11726 * Right position of this view relative to its parent. 11727 * 11728 * @return The right edge of this view, in pixels. 11729 */ 11730 @ViewDebug.CapturedViewProperty 11731 public final int getRight() { 11732 return mRight; 11733 } 11734 11735 /** 11736 * Sets the right position of this view relative to its parent. This method is meant to be called 11737 * by the layout system and should not generally be called otherwise, because the property 11738 * may be changed at any time by the layout. 11739 * 11740 * @param right The right of this view, in pixels. 11741 */ 11742 public final void setRight(int right) { 11743 if (right != mRight) { 11744 final boolean matrixIsIdentity = hasIdentityMatrix(); 11745 if (matrixIsIdentity) { 11746 if (mAttachInfo != null) { 11747 int maxRight; 11748 if (right < mRight) { 11749 maxRight = mRight; 11750 } else { 11751 maxRight = right; 11752 } 11753 invalidate(0, 0, maxRight - mLeft, mBottom - mTop); 11754 } 11755 } else { 11756 // Double-invalidation is necessary to capture view's old and new areas 11757 invalidate(true); 11758 } 11759 11760 int oldWidth = mRight - mLeft; 11761 int height = mBottom - mTop; 11762 11763 mRight = right; 11764 mRenderNode.setRight(mRight); 11765 11766 sizeChange(mRight - mLeft, height, oldWidth, height); 11767 11768 if (!matrixIsIdentity) { 11769 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 11770 invalidate(true); 11771 } 11772 mBackgroundSizeChanged = true; 11773 if (mForegroundInfo != null) { 11774 mForegroundInfo.mBoundsChanged = true; 11775 } 11776 invalidateParentIfNeeded(); 11777 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) == PFLAG2_VIEW_QUICK_REJECTED) { 11778 // View was rejected last time it was drawn by its parent; this may have changed 11779 invalidateParentIfNeeded(); 11780 } 11781 } 11782 } 11783 11784 /** 11785 * The visual x position of this view, in pixels. This is equivalent to the 11786 * {@link #setTranslationX(float) translationX} property plus the current 11787 * {@link #getLeft() left} property. 11788 * 11789 * @return The visual x position of this view, in pixels. 11790 */ 11791 @ViewDebug.ExportedProperty(category = "drawing") 11792 public float getX() { 11793 return mLeft + getTranslationX(); 11794 } 11795 11796 /** 11797 * Sets the visual x position of this view, in pixels. This is equivalent to setting the 11798 * {@link #setTranslationX(float) translationX} property to be the difference between 11799 * the x value passed in and the current {@link #getLeft() left} property. 11800 * 11801 * @param x The visual x position of this view, in pixels. 11802 */ 11803 public void setX(float x) { 11804 setTranslationX(x - mLeft); 11805 } 11806 11807 /** 11808 * The visual y position of this view, in pixels. This is equivalent to the 11809 * {@link #setTranslationY(float) translationY} property plus the current 11810 * {@link #getTop() top} property. 11811 * 11812 * @return The visual y position of this view, in pixels. 11813 */ 11814 @ViewDebug.ExportedProperty(category = "drawing") 11815 public float getY() { 11816 return mTop + getTranslationY(); 11817 } 11818 11819 /** 11820 * Sets the visual y position of this view, in pixels. This is equivalent to setting the 11821 * {@link #setTranslationY(float) translationY} property to be the difference between 11822 * the y value passed in and the current {@link #getTop() top} property. 11823 * 11824 * @param y The visual y position of this view, in pixels. 11825 */ 11826 public void setY(float y) { 11827 setTranslationY(y - mTop); 11828 } 11829 11830 /** 11831 * The visual z position of this view, in pixels. This is equivalent to the 11832 * {@link #setTranslationZ(float) translationZ} property plus the current 11833 * {@link #getElevation() elevation} property. 11834 * 11835 * @return The visual z position of this view, in pixels. 11836 */ 11837 @ViewDebug.ExportedProperty(category = "drawing") 11838 public float getZ() { 11839 return getElevation() + getTranslationZ(); 11840 } 11841 11842 /** 11843 * Sets the visual z position of this view, in pixels. This is equivalent to setting the 11844 * {@link #setTranslationZ(float) translationZ} property to be the difference between 11845 * the x value passed in and the current {@link #getElevation() elevation} property. 11846 * 11847 * @param z The visual z position of this view, in pixels. 11848 */ 11849 public void setZ(float z) { 11850 setTranslationZ(z - getElevation()); 11851 } 11852 11853 /** 11854 * The base elevation of this view relative to its parent, in pixels. 11855 * 11856 * @return The base depth position of the view, in pixels. 11857 */ 11858 @ViewDebug.ExportedProperty(category = "drawing") 11859 public float getElevation() { 11860 return mRenderNode.getElevation(); 11861 } 11862 11863 /** 11864 * Sets the base elevation of this view, in pixels. 11865 * 11866 * @attr ref android.R.styleable#View_elevation 11867 */ 11868 public void setElevation(float elevation) { 11869 if (elevation != getElevation()) { 11870 invalidateViewProperty(true, false); 11871 mRenderNode.setElevation(elevation); 11872 invalidateViewProperty(false, true); 11873 11874 invalidateParentIfNeededAndWasQuickRejected(); 11875 } 11876 } 11877 11878 /** 11879 * The horizontal location of this view relative to its {@link #getLeft() left} position. 11880 * This position is post-layout, in addition to wherever the object's 11881 * layout placed it. 11882 * 11883 * @return The horizontal position of this view relative to its left position, in pixels. 11884 */ 11885 @ViewDebug.ExportedProperty(category = "drawing") 11886 public float getTranslationX() { 11887 return mRenderNode.getTranslationX(); 11888 } 11889 11890 /** 11891 * Sets the horizontal location of this view relative to its {@link #getLeft() left} position. 11892 * This effectively positions the object post-layout, in addition to wherever the object's 11893 * layout placed it. 11894 * 11895 * @param translationX The horizontal position of this view relative to its left position, 11896 * in pixels. 11897 * 11898 * @attr ref android.R.styleable#View_translationX 11899 */ 11900 public void setTranslationX(float translationX) { 11901 if (translationX != getTranslationX()) { 11902 invalidateViewProperty(true, false); 11903 mRenderNode.setTranslationX(translationX); 11904 invalidateViewProperty(false, true); 11905 11906 invalidateParentIfNeededAndWasQuickRejected(); 11907 notifySubtreeAccessibilityStateChangedIfNeeded(); 11908 } 11909 } 11910 11911 /** 11912 * The vertical location of this view relative to its {@link #getTop() top} position. 11913 * This position is post-layout, in addition to wherever the object's 11914 * layout placed it. 11915 * 11916 * @return The vertical position of this view relative to its top position, 11917 * in pixels. 11918 */ 11919 @ViewDebug.ExportedProperty(category = "drawing") 11920 public float getTranslationY() { 11921 return mRenderNode.getTranslationY(); 11922 } 11923 11924 /** 11925 * Sets the vertical location of this view relative to its {@link #getTop() top} position. 11926 * This effectively positions the object post-layout, in addition to wherever the object's 11927 * layout placed it. 11928 * 11929 * @param translationY The vertical position of this view relative to its top position, 11930 * in pixels. 11931 * 11932 * @attr ref android.R.styleable#View_translationY 11933 */ 11934 public void setTranslationY(float translationY) { 11935 if (translationY != getTranslationY()) { 11936 invalidateViewProperty(true, false); 11937 mRenderNode.setTranslationY(translationY); 11938 invalidateViewProperty(false, true); 11939 11940 invalidateParentIfNeededAndWasQuickRejected(); 11941 notifySubtreeAccessibilityStateChangedIfNeeded(); 11942 } 11943 } 11944 11945 /** 11946 * The depth location of this view relative to its {@link #getElevation() elevation}. 11947 * 11948 * @return The depth of this view relative to its elevation. 11949 */ 11950 @ViewDebug.ExportedProperty(category = "drawing") 11951 public float getTranslationZ() { 11952 return mRenderNode.getTranslationZ(); 11953 } 11954 11955 /** 11956 * Sets the depth location of this view relative to its {@link #getElevation() elevation}. 11957 * 11958 * @attr ref android.R.styleable#View_translationZ 11959 */ 11960 public void setTranslationZ(float translationZ) { 11961 if (translationZ != getTranslationZ()) { 11962 invalidateViewProperty(true, false); 11963 mRenderNode.setTranslationZ(translationZ); 11964 invalidateViewProperty(false, true); 11965 11966 invalidateParentIfNeededAndWasQuickRejected(); 11967 } 11968 } 11969 11970 /** @hide */ 11971 public void setAnimationMatrix(Matrix matrix) { 11972 invalidateViewProperty(true, false); 11973 mRenderNode.setAnimationMatrix(matrix); 11974 invalidateViewProperty(false, true); 11975 11976 invalidateParentIfNeededAndWasQuickRejected(); 11977 } 11978 11979 /** 11980 * Returns the current StateListAnimator if exists. 11981 * 11982 * @return StateListAnimator or null if it does not exists 11983 * @see #setStateListAnimator(android.animation.StateListAnimator) 11984 */ 11985 public StateListAnimator getStateListAnimator() { 11986 return mStateListAnimator; 11987 } 11988 11989 /** 11990 * Attaches the provided StateListAnimator to this View. 11991 * <p> 11992 * Any previously attached StateListAnimator will be detached. 11993 * 11994 * @param stateListAnimator The StateListAnimator to update the view 11995 * @see {@link android.animation.StateListAnimator} 11996 */ 11997 public void setStateListAnimator(StateListAnimator stateListAnimator) { 11998 if (mStateListAnimator == stateListAnimator) { 11999 return; 12000 } 12001 if (mStateListAnimator != null) { 12002 mStateListAnimator.setTarget(null); 12003 } 12004 mStateListAnimator = stateListAnimator; 12005 if (stateListAnimator != null) { 12006 stateListAnimator.setTarget(this); 12007 if (isAttachedToWindow()) { 12008 stateListAnimator.setState(getDrawableState()); 12009 } 12010 } 12011 } 12012 12013 /** 12014 * Returns whether the Outline should be used to clip the contents of the View. 12015 * <p> 12016 * Note that this flag will only be respected if the View's Outline returns true from 12017 * {@link Outline#canClip()}. 12018 * 12019 * @see #setOutlineProvider(ViewOutlineProvider) 12020 * @see #setClipToOutline(boolean) 12021 */ 12022 public final boolean getClipToOutline() { 12023 return mRenderNode.getClipToOutline(); 12024 } 12025 12026 /** 12027 * Sets whether the View's Outline should be used to clip the contents of the View. 12028 * <p> 12029 * Only a single non-rectangular clip can be applied on a View at any time. 12030 * Circular clips from a {@link ViewAnimationUtils#createCircularReveal(View, int, int, float, float) 12031 * circular reveal} animation take priority over Outline clipping, and 12032 * child Outline clipping takes priority over Outline clipping done by a 12033 * parent. 12034 * <p> 12035 * Note that this flag will only be respected if the View's Outline returns true from 12036 * {@link Outline#canClip()}. 12037 * 12038 * @see #setOutlineProvider(ViewOutlineProvider) 12039 * @see #getClipToOutline() 12040 */ 12041 public void setClipToOutline(boolean clipToOutline) { 12042 damageInParent(); 12043 if (getClipToOutline() != clipToOutline) { 12044 mRenderNode.setClipToOutline(clipToOutline); 12045 } 12046 } 12047 12048 // correspond to the enum values of View_outlineProvider 12049 private static final int PROVIDER_BACKGROUND = 0; 12050 private static final int PROVIDER_NONE = 1; 12051 private static final int PROVIDER_BOUNDS = 2; 12052 private static final int PROVIDER_PADDED_BOUNDS = 3; 12053 private void setOutlineProviderFromAttribute(int providerInt) { 12054 switch (providerInt) { 12055 case PROVIDER_BACKGROUND: 12056 setOutlineProvider(ViewOutlineProvider.BACKGROUND); 12057 break; 12058 case PROVIDER_NONE: 12059 setOutlineProvider(null); 12060 break; 12061 case PROVIDER_BOUNDS: 12062 setOutlineProvider(ViewOutlineProvider.BOUNDS); 12063 break; 12064 case PROVIDER_PADDED_BOUNDS: 12065 setOutlineProvider(ViewOutlineProvider.PADDED_BOUNDS); 12066 break; 12067 } 12068 } 12069 12070 /** 12071 * Sets the {@link ViewOutlineProvider} of the view, which generates the Outline that defines 12072 * the shape of the shadow it casts, and enables outline clipping. 12073 * <p> 12074 * The default ViewOutlineProvider, {@link ViewOutlineProvider#BACKGROUND}, queries the Outline 12075 * from the View's background drawable, via {@link Drawable#getOutline(Outline)}. Changing the 12076 * outline provider with this method allows this behavior to be overridden. 12077 * <p> 12078 * If the ViewOutlineProvider is null, if querying it for an outline returns false, 12079 * or if the produced Outline is {@link Outline#isEmpty()}, shadows will not be cast. 12080 * <p> 12081 * Only outlines that return true from {@link Outline#canClip()} may be used for clipping. 12082 * 12083 * @see #setClipToOutline(boolean) 12084 * @see #getClipToOutline() 12085 * @see #getOutlineProvider() 12086 */ 12087 public void setOutlineProvider(ViewOutlineProvider provider) { 12088 mOutlineProvider = provider; 12089 invalidateOutline(); 12090 } 12091 12092 /** 12093 * Returns the current {@link ViewOutlineProvider} of the view, which generates the Outline 12094 * that defines the shape of the shadow it casts, and enables outline clipping. 12095 * 12096 * @see #setOutlineProvider(ViewOutlineProvider) 12097 */ 12098 public ViewOutlineProvider getOutlineProvider() { 12099 return mOutlineProvider; 12100 } 12101 12102 /** 12103 * Called to rebuild this View's Outline from its {@link ViewOutlineProvider outline provider} 12104 * 12105 * @see #setOutlineProvider(ViewOutlineProvider) 12106 */ 12107 public void invalidateOutline() { 12108 rebuildOutline(); 12109 12110 notifySubtreeAccessibilityStateChangedIfNeeded(); 12111 invalidateViewProperty(false, false); 12112 } 12113 12114 /** 12115 * Internal version of {@link #invalidateOutline()} which invalidates the 12116 * outline without invalidating the view itself. This is intended to be called from 12117 * within methods in the View class itself which are the result of the view being 12118 * invalidated already. For example, when we are drawing the background of a View, 12119 * we invalidate the outline in case it changed in the meantime, but we do not 12120 * need to invalidate the view because we're already drawing the background as part 12121 * of drawing the view in response to an earlier invalidation of the view. 12122 */ 12123 private void rebuildOutline() { 12124 // Unattached views ignore this signal, and outline is recomputed in onAttachedToWindow() 12125 if (mAttachInfo == null) return; 12126 12127 if (mOutlineProvider == null) { 12128 // no provider, remove outline 12129 mRenderNode.setOutline(null); 12130 } else { 12131 final Outline outline = mAttachInfo.mTmpOutline; 12132 outline.setEmpty(); 12133 outline.setAlpha(1.0f); 12134 12135 mOutlineProvider.getOutline(this, outline); 12136 mRenderNode.setOutline(outline); 12137 } 12138 } 12139 12140 /** 12141 * HierarchyViewer only 12142 * 12143 * @hide 12144 */ 12145 @ViewDebug.ExportedProperty(category = "drawing") 12146 public boolean hasShadow() { 12147 return mRenderNode.hasShadow(); 12148 } 12149 12150 12151 /** @hide */ 12152 public void setRevealClip(boolean shouldClip, float x, float y, float radius) { 12153 mRenderNode.setRevealClip(shouldClip, x, y, radius); 12154 invalidateViewProperty(false, false); 12155 } 12156 12157 /** 12158 * Hit rectangle in parent's coordinates 12159 * 12160 * @param outRect The hit rectangle of the view. 12161 */ 12162 public void getHitRect(Rect outRect) { 12163 if (hasIdentityMatrix() || mAttachInfo == null) { 12164 outRect.set(mLeft, mTop, mRight, mBottom); 12165 } else { 12166 final RectF tmpRect = mAttachInfo.mTmpTransformRect; 12167 tmpRect.set(0, 0, getWidth(), getHeight()); 12168 getMatrix().mapRect(tmpRect); // TODO: mRenderNode.mapRect(tmpRect) 12169 outRect.set((int) tmpRect.left + mLeft, (int) tmpRect.top + mTop, 12170 (int) tmpRect.right + mLeft, (int) tmpRect.bottom + mTop); 12171 } 12172 } 12173 12174 /** 12175 * Determines whether the given point, in local coordinates is inside the view. 12176 */ 12177 /*package*/ final boolean pointInView(float localX, float localY) { 12178 return localX >= 0 && localX < (mRight - mLeft) 12179 && localY >= 0 && localY < (mBottom - mTop); 12180 } 12181 12182 /** 12183 * Utility method to determine whether the given point, in local coordinates, 12184 * is inside the view, where the area of the view is expanded by the slop factor. 12185 * This method is called while processing touch-move events to determine if the event 12186 * is still within the view. 12187 * 12188 * @hide 12189 */ 12190 public boolean pointInView(float localX, float localY, float slop) { 12191 return localX >= -slop && localY >= -slop && localX < ((mRight - mLeft) + slop) && 12192 localY < ((mBottom - mTop) + slop); 12193 } 12194 12195 /** 12196 * When a view has focus and the user navigates away from it, the next view is searched for 12197 * starting from the rectangle filled in by this method. 12198 * 12199 * By default, the rectangle is the {@link #getDrawingRect(android.graphics.Rect)}) 12200 * of the view. However, if your view maintains some idea of internal selection, 12201 * such as a cursor, or a selected row or column, you should override this method and 12202 * fill in a more specific rectangle. 12203 * 12204 * @param r The rectangle to fill in, in this view's coordinates. 12205 */ 12206 public void getFocusedRect(Rect r) { 12207 getDrawingRect(r); 12208 } 12209 12210 /** 12211 * If some part of this view is not clipped by any of its parents, then 12212 * return that area in r in global (root) coordinates. To convert r to local 12213 * coordinates (without taking possible View rotations into account), offset 12214 * it by -globalOffset (e.g. r.offset(-globalOffset.x, -globalOffset.y)). 12215 * If the view is completely clipped or translated out, return false. 12216 * 12217 * @param r If true is returned, r holds the global coordinates of the 12218 * visible portion of this view. 12219 * @param globalOffset If true is returned, globalOffset holds the dx,dy 12220 * between this view and its root. globalOffet may be null. 12221 * @return true if r is non-empty (i.e. part of the view is visible at the 12222 * root level. 12223 */ 12224 public boolean getGlobalVisibleRect(Rect r, Point globalOffset) { 12225 int width = mRight - mLeft; 12226 int height = mBottom - mTop; 12227 if (width > 0 && height > 0) { 12228 r.set(0, 0, width, height); 12229 if (globalOffset != null) { 12230 globalOffset.set(-mScrollX, -mScrollY); 12231 } 12232 return mParent == null || mParent.getChildVisibleRect(this, r, globalOffset); 12233 } 12234 return false; 12235 } 12236 12237 public final boolean getGlobalVisibleRect(Rect r) { 12238 return getGlobalVisibleRect(r, null); 12239 } 12240 12241 public final boolean getLocalVisibleRect(Rect r) { 12242 final Point offset = mAttachInfo != null ? mAttachInfo.mPoint : new Point(); 12243 if (getGlobalVisibleRect(r, offset)) { 12244 r.offset(-offset.x, -offset.y); // make r local 12245 return true; 12246 } 12247 return false; 12248 } 12249 12250 /** 12251 * Offset this view's vertical location by the specified number of pixels. 12252 * 12253 * @param offset the number of pixels to offset the view by 12254 */ 12255 public void offsetTopAndBottom(int offset) { 12256 if (offset != 0) { 12257 final boolean matrixIsIdentity = hasIdentityMatrix(); 12258 if (matrixIsIdentity) { 12259 if (isHardwareAccelerated()) { 12260 invalidateViewProperty(false, false); 12261 } else { 12262 final ViewParent p = mParent; 12263 if (p != null && mAttachInfo != null) { 12264 final Rect r = mAttachInfo.mTmpInvalRect; 12265 int minTop; 12266 int maxBottom; 12267 int yLoc; 12268 if (offset < 0) { 12269 minTop = mTop + offset; 12270 maxBottom = mBottom; 12271 yLoc = offset; 12272 } else { 12273 minTop = mTop; 12274 maxBottom = mBottom + offset; 12275 yLoc = 0; 12276 } 12277 r.set(0, yLoc, mRight - mLeft, maxBottom - minTop); 12278 p.invalidateChild(this, r); 12279 } 12280 } 12281 } else { 12282 invalidateViewProperty(false, false); 12283 } 12284 12285 mTop += offset; 12286 mBottom += offset; 12287 mRenderNode.offsetTopAndBottom(offset); 12288 if (isHardwareAccelerated()) { 12289 invalidateViewProperty(false, false); 12290 invalidateParentIfNeededAndWasQuickRejected(); 12291 } else { 12292 if (!matrixIsIdentity) { 12293 invalidateViewProperty(false, true); 12294 } 12295 invalidateParentIfNeeded(); 12296 } 12297 notifySubtreeAccessibilityStateChangedIfNeeded(); 12298 } 12299 } 12300 12301 /** 12302 * Offset this view's horizontal location by the specified amount of pixels. 12303 * 12304 * @param offset the number of pixels to offset the view by 12305 */ 12306 public void offsetLeftAndRight(int offset) { 12307 if (offset != 0) { 12308 final boolean matrixIsIdentity = hasIdentityMatrix(); 12309 if (matrixIsIdentity) { 12310 if (isHardwareAccelerated()) { 12311 invalidateViewProperty(false, false); 12312 } else { 12313 final ViewParent p = mParent; 12314 if (p != null && mAttachInfo != null) { 12315 final Rect r = mAttachInfo.mTmpInvalRect; 12316 int minLeft; 12317 int maxRight; 12318 if (offset < 0) { 12319 minLeft = mLeft + offset; 12320 maxRight = mRight; 12321 } else { 12322 minLeft = mLeft; 12323 maxRight = mRight + offset; 12324 } 12325 r.set(0, 0, maxRight - minLeft, mBottom - mTop); 12326 p.invalidateChild(this, r); 12327 } 12328 } 12329 } else { 12330 invalidateViewProperty(false, false); 12331 } 12332 12333 mLeft += offset; 12334 mRight += offset; 12335 mRenderNode.offsetLeftAndRight(offset); 12336 if (isHardwareAccelerated()) { 12337 invalidateViewProperty(false, false); 12338 invalidateParentIfNeededAndWasQuickRejected(); 12339 } else { 12340 if (!matrixIsIdentity) { 12341 invalidateViewProperty(false, true); 12342 } 12343 invalidateParentIfNeeded(); 12344 } 12345 notifySubtreeAccessibilityStateChangedIfNeeded(); 12346 } 12347 } 12348 12349 /** 12350 * Get the LayoutParams associated with this view. All views should have 12351 * layout parameters. These supply parameters to the <i>parent</i> of this 12352 * view specifying how it should be arranged. There are many subclasses of 12353 * ViewGroup.LayoutParams, and these correspond to the different subclasses 12354 * of ViewGroup that are responsible for arranging their children. 12355 * 12356 * This method may return null if this View is not attached to a parent 12357 * ViewGroup or {@link #setLayoutParams(android.view.ViewGroup.LayoutParams)} 12358 * was not invoked successfully. When a View is attached to a parent 12359 * ViewGroup, this method must not return null. 12360 * 12361 * @return The LayoutParams associated with this view, or null if no 12362 * parameters have been set yet 12363 */ 12364 @ViewDebug.ExportedProperty(deepExport = true, prefix = "layout_") 12365 public ViewGroup.LayoutParams getLayoutParams() { 12366 return mLayoutParams; 12367 } 12368 12369 /** 12370 * Set the layout parameters associated with this view. These supply 12371 * parameters to the <i>parent</i> of this view specifying how it should be 12372 * arranged. There are many subclasses of ViewGroup.LayoutParams, and these 12373 * correspond to the different subclasses of ViewGroup that are responsible 12374 * for arranging their children. 12375 * 12376 * @param params The layout parameters for this view, cannot be null 12377 */ 12378 public void setLayoutParams(ViewGroup.LayoutParams params) { 12379 if (params == null) { 12380 throw new NullPointerException("Layout parameters cannot be null"); 12381 } 12382 mLayoutParams = params; 12383 resolveLayoutParams(); 12384 if (mParent instanceof ViewGroup) { 12385 ((ViewGroup) mParent).onSetLayoutParams(this, params); 12386 } 12387 requestLayout(); 12388 } 12389 12390 /** 12391 * Resolve the layout parameters depending on the resolved layout direction 12392 * 12393 * @hide 12394 */ 12395 public void resolveLayoutParams() { 12396 if (mLayoutParams != null) { 12397 mLayoutParams.resolveLayoutDirection(getLayoutDirection()); 12398 } 12399 } 12400 12401 /** 12402 * Set the scrolled position of your view. This will cause a call to 12403 * {@link #onScrollChanged(int, int, int, int)} and the view will be 12404 * invalidated. 12405 * @param x the x position to scroll to 12406 * @param y the y position to scroll to 12407 */ 12408 public void scrollTo(int x, int y) { 12409 if (mScrollX != x || mScrollY != y) { 12410 int oldX = mScrollX; 12411 int oldY = mScrollY; 12412 mScrollX = x; 12413 mScrollY = y; 12414 invalidateParentCaches(); 12415 onScrollChanged(mScrollX, mScrollY, oldX, oldY); 12416 if (!awakenScrollBars()) { 12417 postInvalidateOnAnimation(); 12418 } 12419 } 12420 } 12421 12422 /** 12423 * Move the scrolled position of your view. This will cause a call to 12424 * {@link #onScrollChanged(int, int, int, int)} and the view will be 12425 * invalidated. 12426 * @param x the amount of pixels to scroll by horizontally 12427 * @param y the amount of pixels to scroll by vertically 12428 */ 12429 public void scrollBy(int x, int y) { 12430 scrollTo(mScrollX + x, mScrollY + y); 12431 } 12432 12433 /** 12434 * <p>Trigger the scrollbars to draw. When invoked this method starts an 12435 * animation to fade the scrollbars out after a default delay. If a subclass 12436 * provides animated scrolling, the start delay should equal the duration 12437 * of the scrolling animation.</p> 12438 * 12439 * <p>The animation starts only if at least one of the scrollbars is 12440 * enabled, as specified by {@link #isHorizontalScrollBarEnabled()} and 12441 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 12442 * this method returns true, and false otherwise. If the animation is 12443 * started, this method calls {@link #invalidate()}; in that case the 12444 * caller should not call {@link #invalidate()}.</p> 12445 * 12446 * <p>This method should be invoked every time a subclass directly updates 12447 * the scroll parameters.</p> 12448 * 12449 * <p>This method is automatically invoked by {@link #scrollBy(int, int)} 12450 * and {@link #scrollTo(int, int)}.</p> 12451 * 12452 * @return true if the animation is played, false otherwise 12453 * 12454 * @see #awakenScrollBars(int) 12455 * @see #scrollBy(int, int) 12456 * @see #scrollTo(int, int) 12457 * @see #isHorizontalScrollBarEnabled() 12458 * @see #isVerticalScrollBarEnabled() 12459 * @see #setHorizontalScrollBarEnabled(boolean) 12460 * @see #setVerticalScrollBarEnabled(boolean) 12461 */ 12462 protected boolean awakenScrollBars() { 12463 return mScrollCache != null && 12464 awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade, true); 12465 } 12466 12467 /** 12468 * Trigger the scrollbars to draw. 12469 * This method differs from awakenScrollBars() only in its default duration. 12470 * initialAwakenScrollBars() will show the scroll bars for longer than 12471 * usual to give the user more of a chance to notice them. 12472 * 12473 * @return true if the animation is played, false otherwise. 12474 */ 12475 private boolean initialAwakenScrollBars() { 12476 return mScrollCache != null && 12477 awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade * 4, true); 12478 } 12479 12480 /** 12481 * <p> 12482 * Trigger the scrollbars to draw. When invoked this method starts an 12483 * animation to fade the scrollbars out after a fixed delay. If a subclass 12484 * provides animated scrolling, the start delay should equal the duration of 12485 * the scrolling animation. 12486 * </p> 12487 * 12488 * <p> 12489 * The animation starts only if at least one of the scrollbars is enabled, 12490 * as specified by {@link #isHorizontalScrollBarEnabled()} and 12491 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 12492 * this method returns true, and false otherwise. If the animation is 12493 * started, this method calls {@link #invalidate()}; in that case the caller 12494 * should not call {@link #invalidate()}. 12495 * </p> 12496 * 12497 * <p> 12498 * This method should be invoked every time a subclass directly updates the 12499 * scroll parameters. 12500 * </p> 12501 * 12502 * @param startDelay the delay, in milliseconds, after which the animation 12503 * should start; when the delay is 0, the animation starts 12504 * immediately 12505 * @return true if the animation is played, false otherwise 12506 * 12507 * @see #scrollBy(int, int) 12508 * @see #scrollTo(int, int) 12509 * @see #isHorizontalScrollBarEnabled() 12510 * @see #isVerticalScrollBarEnabled() 12511 * @see #setHorizontalScrollBarEnabled(boolean) 12512 * @see #setVerticalScrollBarEnabled(boolean) 12513 */ 12514 protected boolean awakenScrollBars(int startDelay) { 12515 return awakenScrollBars(startDelay, true); 12516 } 12517 12518 /** 12519 * <p> 12520 * Trigger the scrollbars to draw. When invoked this method starts an 12521 * animation to fade the scrollbars out after a fixed delay. If a subclass 12522 * provides animated scrolling, the start delay should equal the duration of 12523 * the scrolling animation. 12524 * </p> 12525 * 12526 * <p> 12527 * The animation starts only if at least one of the scrollbars is enabled, 12528 * as specified by {@link #isHorizontalScrollBarEnabled()} and 12529 * {@link #isVerticalScrollBarEnabled()}. When the animation is started, 12530 * this method returns true, and false otherwise. If the animation is 12531 * started, this method calls {@link #invalidate()} if the invalidate parameter 12532 * is set to true; in that case the caller 12533 * should not call {@link #invalidate()}. 12534 * </p> 12535 * 12536 * <p> 12537 * This method should be invoked every time a subclass directly updates the 12538 * scroll parameters. 12539 * </p> 12540 * 12541 * @param startDelay the delay, in milliseconds, after which the animation 12542 * should start; when the delay is 0, the animation starts 12543 * immediately 12544 * 12545 * @param invalidate Whether this method should call invalidate 12546 * 12547 * @return true if the animation is played, false otherwise 12548 * 12549 * @see #scrollBy(int, int) 12550 * @see #scrollTo(int, int) 12551 * @see #isHorizontalScrollBarEnabled() 12552 * @see #isVerticalScrollBarEnabled() 12553 * @see #setHorizontalScrollBarEnabled(boolean) 12554 * @see #setVerticalScrollBarEnabled(boolean) 12555 */ 12556 protected boolean awakenScrollBars(int startDelay, boolean invalidate) { 12557 final ScrollabilityCache scrollCache = mScrollCache; 12558 12559 if (scrollCache == null || !scrollCache.fadeScrollBars) { 12560 return false; 12561 } 12562 12563 if (scrollCache.scrollBar == null) { 12564 scrollCache.scrollBar = new ScrollBarDrawable(); 12565 scrollCache.scrollBar.setCallback(this); 12566 scrollCache.scrollBar.setState(getDrawableState()); 12567 } 12568 12569 if (isHorizontalScrollBarEnabled() || isVerticalScrollBarEnabled()) { 12570 12571 if (invalidate) { 12572 // Invalidate to show the scrollbars 12573 postInvalidateOnAnimation(); 12574 } 12575 12576 if (scrollCache.state == ScrollabilityCache.OFF) { 12577 // FIXME: this is copied from WindowManagerService. 12578 // We should get this value from the system when it 12579 // is possible to do so. 12580 final int KEY_REPEAT_FIRST_DELAY = 750; 12581 startDelay = Math.max(KEY_REPEAT_FIRST_DELAY, startDelay); 12582 } 12583 12584 // Tell mScrollCache when we should start fading. This may 12585 // extend the fade start time if one was already scheduled 12586 long fadeStartTime = AnimationUtils.currentAnimationTimeMillis() + startDelay; 12587 scrollCache.fadeStartTime = fadeStartTime; 12588 scrollCache.state = ScrollabilityCache.ON; 12589 12590 // Schedule our fader to run, unscheduling any old ones first 12591 if (mAttachInfo != null) { 12592 mAttachInfo.mHandler.removeCallbacks(scrollCache); 12593 mAttachInfo.mHandler.postAtTime(scrollCache, fadeStartTime); 12594 } 12595 12596 return true; 12597 } 12598 12599 return false; 12600 } 12601 12602 /** 12603 * Do not invalidate views which are not visible and which are not running an animation. They 12604 * will not get drawn and they should not set dirty flags as if they will be drawn 12605 */ 12606 private boolean skipInvalidate() { 12607 return (mViewFlags & VISIBILITY_MASK) != VISIBLE && mCurrentAnimation == null && 12608 (!(mParent instanceof ViewGroup) || 12609 !((ViewGroup) mParent).isViewTransitioning(this)); 12610 } 12611 12612 /** 12613 * Mark the area defined by dirty as needing to be drawn. If the view is 12614 * visible, {@link #onDraw(android.graphics.Canvas)} will be called at some 12615 * point in the future. 12616 * <p> 12617 * This must be called from a UI thread. To call from a non-UI thread, call 12618 * {@link #postInvalidate()}. 12619 * <p> 12620 * <b>WARNING:</b> In API 19 and below, this method may be destructive to 12621 * {@code dirty}. 12622 * 12623 * @param dirty the rectangle representing the bounds of the dirty region 12624 */ 12625 public void invalidate(Rect dirty) { 12626 final int scrollX = mScrollX; 12627 final int scrollY = mScrollY; 12628 invalidateInternal(dirty.left - scrollX, dirty.top - scrollY, 12629 dirty.right - scrollX, dirty.bottom - scrollY, true, false); 12630 } 12631 12632 /** 12633 * Mark the area defined by the rect (l,t,r,b) as needing to be drawn. The 12634 * coordinates of the dirty rect are relative to the view. If the view is 12635 * visible, {@link #onDraw(android.graphics.Canvas)} will be called at some 12636 * point in the future. 12637 * <p> 12638 * This must be called from a UI thread. To call from a non-UI thread, call 12639 * {@link #postInvalidate()}. 12640 * 12641 * @param l the left position of the dirty region 12642 * @param t the top position of the dirty region 12643 * @param r the right position of the dirty region 12644 * @param b the bottom position of the dirty region 12645 */ 12646 public void invalidate(int l, int t, int r, int b) { 12647 final int scrollX = mScrollX; 12648 final int scrollY = mScrollY; 12649 invalidateInternal(l - scrollX, t - scrollY, r - scrollX, b - scrollY, true, false); 12650 } 12651 12652 /** 12653 * Invalidate the whole view. If the view is visible, 12654 * {@link #onDraw(android.graphics.Canvas)} will be called at some point in 12655 * the future. 12656 * <p> 12657 * This must be called from a UI thread. To call from a non-UI thread, call 12658 * {@link #postInvalidate()}. 12659 */ 12660 public void invalidate() { 12661 invalidate(true); 12662 } 12663 12664 /** 12665 * This is where the invalidate() work actually happens. A full invalidate() 12666 * causes the drawing cache to be invalidated, but this function can be 12667 * called with invalidateCache set to false to skip that invalidation step 12668 * for cases that do not need it (for example, a component that remains at 12669 * the same dimensions with the same content). 12670 * 12671 * @param invalidateCache Whether the drawing cache for this view should be 12672 * invalidated as well. This is usually true for a full 12673 * invalidate, but may be set to false if the View's contents or 12674 * dimensions have not changed. 12675 */ 12676 void invalidate(boolean invalidateCache) { 12677 invalidateInternal(0, 0, mRight - mLeft, mBottom - mTop, invalidateCache, true); 12678 } 12679 12680 void invalidateInternal(int l, int t, int r, int b, boolean invalidateCache, 12681 boolean fullInvalidate) { 12682 if (mGhostView != null) { 12683 mGhostView.invalidate(true); 12684 return; 12685 } 12686 12687 if (skipInvalidate()) { 12688 return; 12689 } 12690 12691 if ((mPrivateFlags & (PFLAG_DRAWN | PFLAG_HAS_BOUNDS)) == (PFLAG_DRAWN | PFLAG_HAS_BOUNDS) 12692 || (invalidateCache && (mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == PFLAG_DRAWING_CACHE_VALID) 12693 || (mPrivateFlags & PFLAG_INVALIDATED) != PFLAG_INVALIDATED 12694 || (fullInvalidate && isOpaque() != mLastIsOpaque)) { 12695 if (fullInvalidate) { 12696 mLastIsOpaque = isOpaque(); 12697 mPrivateFlags &= ~PFLAG_DRAWN; 12698 } 12699 12700 mPrivateFlags |= PFLAG_DIRTY; 12701 12702 if (invalidateCache) { 12703 mPrivateFlags |= PFLAG_INVALIDATED; 12704 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 12705 } 12706 12707 // Propagate the damage rectangle to the parent view. 12708 final AttachInfo ai = mAttachInfo; 12709 final ViewParent p = mParent; 12710 if (p != null && ai != null && l < r && t < b) { 12711 final Rect damage = ai.mTmpInvalRect; 12712 damage.set(l, t, r, b); 12713 p.invalidateChild(this, damage); 12714 } 12715 12716 // Damage the entire projection receiver, if necessary. 12717 if (mBackground != null && mBackground.isProjected()) { 12718 final View receiver = getProjectionReceiver(); 12719 if (receiver != null) { 12720 receiver.damageInParent(); 12721 } 12722 } 12723 12724 // Damage the entire IsolatedZVolume receiving this view's shadow. 12725 if (isHardwareAccelerated() && getZ() != 0) { 12726 damageShadowReceiver(); 12727 } 12728 } 12729 } 12730 12731 /** 12732 * @return this view's projection receiver, or {@code null} if none exists 12733 */ 12734 private View getProjectionReceiver() { 12735 ViewParent p = getParent(); 12736 while (p != null && p instanceof View) { 12737 final View v = (View) p; 12738 if (v.isProjectionReceiver()) { 12739 return v; 12740 } 12741 p = p.getParent(); 12742 } 12743 12744 return null; 12745 } 12746 12747 /** 12748 * @return whether the view is a projection receiver 12749 */ 12750 private boolean isProjectionReceiver() { 12751 return mBackground != null; 12752 } 12753 12754 /** 12755 * Damage area of the screen that can be covered by this View's shadow. 12756 * 12757 * This method will guarantee that any changes to shadows cast by a View 12758 * are damaged on the screen for future redraw. 12759 */ 12760 private void damageShadowReceiver() { 12761 final AttachInfo ai = mAttachInfo; 12762 if (ai != null) { 12763 ViewParent p = getParent(); 12764 if (p != null && p instanceof ViewGroup) { 12765 final ViewGroup vg = (ViewGroup) p; 12766 vg.damageInParent(); 12767 } 12768 } 12769 } 12770 12771 /** 12772 * Quick invalidation for View property changes (alpha, translationXY, etc.). We don't want to 12773 * set any flags or handle all of the cases handled by the default invalidation methods. 12774 * Instead, we just want to schedule a traversal in ViewRootImpl with the appropriate 12775 * dirty rect. This method calls into fast invalidation methods in ViewGroup that 12776 * walk up the hierarchy, transforming the dirty rect as necessary. 12777 * 12778 * The method also handles normal invalidation logic if display list properties are not 12779 * being used in this view. The invalidateParent and forceRedraw flags are used by that 12780 * backup approach, to handle these cases used in the various property-setting methods. 12781 * 12782 * @param invalidateParent Force a call to invalidateParentCaches() if display list properties 12783 * are not being used in this view 12784 * @param forceRedraw Mark the view as DRAWN to force the invalidation to propagate, if display 12785 * list properties are not being used in this view 12786 */ 12787 void invalidateViewProperty(boolean invalidateParent, boolean forceRedraw) { 12788 if (!isHardwareAccelerated() 12789 || !mRenderNode.isValid() 12790 || (mPrivateFlags & PFLAG_DRAW_ANIMATION) != 0) { 12791 if (invalidateParent) { 12792 invalidateParentCaches(); 12793 } 12794 if (forceRedraw) { 12795 mPrivateFlags |= PFLAG_DRAWN; // force another invalidation with the new orientation 12796 } 12797 invalidate(false); 12798 } else { 12799 damageInParent(); 12800 } 12801 if (isHardwareAccelerated() && invalidateParent && getZ() != 0) { 12802 damageShadowReceiver(); 12803 } 12804 } 12805 12806 /** 12807 * Tells the parent view to damage this view's bounds. 12808 * 12809 * @hide 12810 */ 12811 protected void damageInParent() { 12812 final AttachInfo ai = mAttachInfo; 12813 final ViewParent p = mParent; 12814 if (p != null && ai != null) { 12815 final Rect r = ai.mTmpInvalRect; 12816 r.set(0, 0, mRight - mLeft, mBottom - mTop); 12817 if (mParent instanceof ViewGroup) { 12818 ((ViewGroup) mParent).damageChild(this, r); 12819 } else { 12820 mParent.invalidateChild(this, r); 12821 } 12822 } 12823 } 12824 12825 /** 12826 * Utility method to transform a given Rect by the current matrix of this view. 12827 */ 12828 void transformRect(final Rect rect) { 12829 if (!getMatrix().isIdentity()) { 12830 RectF boundingRect = mAttachInfo.mTmpTransformRect; 12831 boundingRect.set(rect); 12832 getMatrix().mapRect(boundingRect); 12833 rect.set((int) Math.floor(boundingRect.left), 12834 (int) Math.floor(boundingRect.top), 12835 (int) Math.ceil(boundingRect.right), 12836 (int) Math.ceil(boundingRect.bottom)); 12837 } 12838 } 12839 12840 /** 12841 * Used to indicate that the parent of this view should clear its caches. This functionality 12842 * is used to force the parent to rebuild its display list (when hardware-accelerated), 12843 * which is necessary when various parent-managed properties of the view change, such as 12844 * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method only 12845 * clears the parent caches and does not causes an invalidate event. 12846 * 12847 * @hide 12848 */ 12849 protected void invalidateParentCaches() { 12850 if (mParent instanceof View) { 12851 ((View) mParent).mPrivateFlags |= PFLAG_INVALIDATED; 12852 } 12853 } 12854 12855 /** 12856 * Used to indicate that the parent of this view should be invalidated. This functionality 12857 * is used to force the parent to rebuild its display list (when hardware-accelerated), 12858 * which is necessary when various parent-managed properties of the view change, such as 12859 * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method will propagate 12860 * an invalidation event to the parent. 12861 * 12862 * @hide 12863 */ 12864 protected void invalidateParentIfNeeded() { 12865 if (isHardwareAccelerated() && mParent instanceof View) { 12866 ((View) mParent).invalidate(true); 12867 } 12868 } 12869 12870 /** 12871 * @hide 12872 */ 12873 protected void invalidateParentIfNeededAndWasQuickRejected() { 12874 if ((mPrivateFlags2 & PFLAG2_VIEW_QUICK_REJECTED) != 0) { 12875 // View was rejected last time it was drawn by its parent; this may have changed 12876 invalidateParentIfNeeded(); 12877 } 12878 } 12879 12880 /** 12881 * Indicates whether this View is opaque. An opaque View guarantees that it will 12882 * draw all the pixels overlapping its bounds using a fully opaque color. 12883 * 12884 * Subclasses of View should override this method whenever possible to indicate 12885 * whether an instance is opaque. Opaque Views are treated in a special way by 12886 * the View hierarchy, possibly allowing it to perform optimizations during 12887 * invalidate/draw passes. 12888 * 12889 * @return True if this View is guaranteed to be fully opaque, false otherwise. 12890 */ 12891 @ViewDebug.ExportedProperty(category = "drawing") 12892 public boolean isOpaque() { 12893 return (mPrivateFlags & PFLAG_OPAQUE_MASK) == PFLAG_OPAQUE_MASK && 12894 getFinalAlpha() >= 1.0f; 12895 } 12896 12897 /** 12898 * @hide 12899 */ 12900 protected void computeOpaqueFlags() { 12901 // Opaque if: 12902 // - Has a background 12903 // - Background is opaque 12904 // - Doesn't have scrollbars or scrollbars overlay 12905 12906 if (mBackground != null && mBackground.getOpacity() == PixelFormat.OPAQUE) { 12907 mPrivateFlags |= PFLAG_OPAQUE_BACKGROUND; 12908 } else { 12909 mPrivateFlags &= ~PFLAG_OPAQUE_BACKGROUND; 12910 } 12911 12912 final int flags = mViewFlags; 12913 if (((flags & SCROLLBARS_VERTICAL) == 0 && (flags & SCROLLBARS_HORIZONTAL) == 0) || 12914 (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_INSIDE_OVERLAY || 12915 (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_OUTSIDE_OVERLAY) { 12916 mPrivateFlags |= PFLAG_OPAQUE_SCROLLBARS; 12917 } else { 12918 mPrivateFlags &= ~PFLAG_OPAQUE_SCROLLBARS; 12919 } 12920 } 12921 12922 /** 12923 * @hide 12924 */ 12925 protected boolean hasOpaqueScrollbars() { 12926 return (mPrivateFlags & PFLAG_OPAQUE_SCROLLBARS) == PFLAG_OPAQUE_SCROLLBARS; 12927 } 12928 12929 /** 12930 * @return A handler associated with the thread running the View. This 12931 * handler can be used to pump events in the UI events queue. 12932 */ 12933 public Handler getHandler() { 12934 final AttachInfo attachInfo = mAttachInfo; 12935 if (attachInfo != null) { 12936 return attachInfo.mHandler; 12937 } 12938 return null; 12939 } 12940 12941 /** 12942 * Gets the view root associated with the View. 12943 * @return The view root, or null if none. 12944 * @hide 12945 */ 12946 public ViewRootImpl getViewRootImpl() { 12947 if (mAttachInfo != null) { 12948 return mAttachInfo.mViewRootImpl; 12949 } 12950 return null; 12951 } 12952 12953 /** 12954 * @hide 12955 */ 12956 public HardwareRenderer getHardwareRenderer() { 12957 return mAttachInfo != null ? mAttachInfo.mHardwareRenderer : null; 12958 } 12959 12960 /** 12961 * <p>Causes the Runnable to be added to the message queue. 12962 * The runnable will be run on the user interface thread.</p> 12963 * 12964 * @param action The Runnable that will be executed. 12965 * 12966 * @return Returns true if the Runnable was successfully placed in to the 12967 * message queue. Returns false on failure, usually because the 12968 * looper processing the message queue is exiting. 12969 * 12970 * @see #postDelayed 12971 * @see #removeCallbacks 12972 */ 12973 public boolean post(Runnable action) { 12974 final AttachInfo attachInfo = mAttachInfo; 12975 if (attachInfo != null) { 12976 return attachInfo.mHandler.post(action); 12977 } 12978 // Assume that post will succeed later 12979 ViewRootImpl.getRunQueue().post(action); 12980 return true; 12981 } 12982 12983 /** 12984 * <p>Causes the Runnable to be added to the message queue, to be run 12985 * after the specified amount of time elapses. 12986 * The runnable will be run on the user interface thread.</p> 12987 * 12988 * @param action The Runnable that will be executed. 12989 * @param delayMillis The delay (in milliseconds) until the Runnable 12990 * will be executed. 12991 * 12992 * @return true if the Runnable was successfully placed in to the 12993 * message queue. Returns false on failure, usually because the 12994 * looper processing the message queue is exiting. Note that a 12995 * result of true does not mean the Runnable will be processed -- 12996 * if the looper is quit before the delivery time of the message 12997 * occurs then the message will be dropped. 12998 * 12999 * @see #post 13000 * @see #removeCallbacks 13001 */ 13002 public boolean postDelayed(Runnable action, long delayMillis) { 13003 final AttachInfo attachInfo = mAttachInfo; 13004 if (attachInfo != null) { 13005 return attachInfo.mHandler.postDelayed(action, delayMillis); 13006 } 13007 // Assume that post will succeed later 13008 ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); 13009 return true; 13010 } 13011 13012 /** 13013 * <p>Causes the Runnable to execute on the next animation time step. 13014 * The runnable will be run on the user interface thread.</p> 13015 * 13016 * @param action The Runnable that will be executed. 13017 * 13018 * @see #postOnAnimationDelayed 13019 * @see #removeCallbacks 13020 */ 13021 public void postOnAnimation(Runnable action) { 13022 final AttachInfo attachInfo = mAttachInfo; 13023 if (attachInfo != null) { 13024 attachInfo.mViewRootImpl.mChoreographer.postCallback( 13025 Choreographer.CALLBACK_ANIMATION, action, null); 13026 } else { 13027 // Assume that post will succeed later 13028 ViewRootImpl.getRunQueue().post(action); 13029 } 13030 } 13031 13032 /** 13033 * <p>Causes the Runnable to execute on the next animation time step, 13034 * after the specified amount of time elapses. 13035 * The runnable will be run on the user interface thread.</p> 13036 * 13037 * @param action The Runnable that will be executed. 13038 * @param delayMillis The delay (in milliseconds) until the Runnable 13039 * will be executed. 13040 * 13041 * @see #postOnAnimation 13042 * @see #removeCallbacks 13043 */ 13044 public void postOnAnimationDelayed(Runnable action, long delayMillis) { 13045 final AttachInfo attachInfo = mAttachInfo; 13046 if (attachInfo != null) { 13047 attachInfo.mViewRootImpl.mChoreographer.postCallbackDelayed( 13048 Choreographer.CALLBACK_ANIMATION, action, null, delayMillis); 13049 } else { 13050 // Assume that post will succeed later 13051 ViewRootImpl.getRunQueue().postDelayed(action, delayMillis); 13052 } 13053 } 13054 13055 /** 13056 * <p>Removes the specified Runnable from the message queue.</p> 13057 * 13058 * @param action The Runnable to remove from the message handling queue 13059 * 13060 * @return true if this view could ask the Handler to remove the Runnable, 13061 * false otherwise. When the returned value is true, the Runnable 13062 * may or may not have been actually removed from the message queue 13063 * (for instance, if the Runnable was not in the queue already.) 13064 * 13065 * @see #post 13066 * @see #postDelayed 13067 * @see #postOnAnimation 13068 * @see #postOnAnimationDelayed 13069 */ 13070 public boolean removeCallbacks(Runnable action) { 13071 if (action != null) { 13072 final AttachInfo attachInfo = mAttachInfo; 13073 if (attachInfo != null) { 13074 attachInfo.mHandler.removeCallbacks(action); 13075 attachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 13076 Choreographer.CALLBACK_ANIMATION, action, null); 13077 } 13078 // Assume that post will succeed later 13079 ViewRootImpl.getRunQueue().removeCallbacks(action); 13080 } 13081 return true; 13082 } 13083 13084 /** 13085 * <p>Cause an invalidate to happen on a subsequent cycle through the event loop. 13086 * Use this to invalidate the View from a non-UI thread.</p> 13087 * 13088 * <p>This method can be invoked from outside of the UI thread 13089 * only when this View is attached to a window.</p> 13090 * 13091 * @see #invalidate() 13092 * @see #postInvalidateDelayed(long) 13093 */ 13094 public void postInvalidate() { 13095 postInvalidateDelayed(0); 13096 } 13097 13098 /** 13099 * <p>Cause an invalidate of the specified area to happen on a subsequent cycle 13100 * through the event loop. Use this to invalidate the View from a non-UI thread.</p> 13101 * 13102 * <p>This method can be invoked from outside of the UI thread 13103 * only when this View is attached to a window.</p> 13104 * 13105 * @param left The left coordinate of the rectangle to invalidate. 13106 * @param top The top coordinate of the rectangle to invalidate. 13107 * @param right The right coordinate of the rectangle to invalidate. 13108 * @param bottom The bottom coordinate of the rectangle to invalidate. 13109 * 13110 * @see #invalidate(int, int, int, int) 13111 * @see #invalidate(Rect) 13112 * @see #postInvalidateDelayed(long, int, int, int, int) 13113 */ 13114 public void postInvalidate(int left, int top, int right, int bottom) { 13115 postInvalidateDelayed(0, left, top, right, bottom); 13116 } 13117 13118 /** 13119 * <p>Cause an invalidate to happen on a subsequent cycle through the event 13120 * loop. Waits for the specified amount of time.</p> 13121 * 13122 * <p>This method can be invoked from outside of the UI thread 13123 * only when this View is attached to a window.</p> 13124 * 13125 * @param delayMilliseconds the duration in milliseconds to delay the 13126 * invalidation by 13127 * 13128 * @see #invalidate() 13129 * @see #postInvalidate() 13130 */ 13131 public void postInvalidateDelayed(long delayMilliseconds) { 13132 // We try only with the AttachInfo because there's no point in invalidating 13133 // if we are not attached to our window 13134 final AttachInfo attachInfo = mAttachInfo; 13135 if (attachInfo != null) { 13136 attachInfo.mViewRootImpl.dispatchInvalidateDelayed(this, delayMilliseconds); 13137 } 13138 } 13139 13140 /** 13141 * <p>Cause an invalidate of the specified area to happen on a subsequent cycle 13142 * through the event loop. Waits for the specified amount of time.</p> 13143 * 13144 * <p>This method can be invoked from outside of the UI thread 13145 * only when this View is attached to a window.</p> 13146 * 13147 * @param delayMilliseconds the duration in milliseconds to delay the 13148 * invalidation by 13149 * @param left The left coordinate of the rectangle to invalidate. 13150 * @param top The top coordinate of the rectangle to invalidate. 13151 * @param right The right coordinate of the rectangle to invalidate. 13152 * @param bottom The bottom coordinate of the rectangle to invalidate. 13153 * 13154 * @see #invalidate(int, int, int, int) 13155 * @see #invalidate(Rect) 13156 * @see #postInvalidate(int, int, int, int) 13157 */ 13158 public void postInvalidateDelayed(long delayMilliseconds, int left, int top, 13159 int right, int bottom) { 13160 13161 // We try only with the AttachInfo because there's no point in invalidating 13162 // if we are not attached to our window 13163 final AttachInfo attachInfo = mAttachInfo; 13164 if (attachInfo != null) { 13165 final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.obtain(); 13166 info.target = this; 13167 info.left = left; 13168 info.top = top; 13169 info.right = right; 13170 info.bottom = bottom; 13171 13172 attachInfo.mViewRootImpl.dispatchInvalidateRectDelayed(info, delayMilliseconds); 13173 } 13174 } 13175 13176 /** 13177 * <p>Cause an invalidate to happen on the next animation time step, typically the 13178 * next display frame.</p> 13179 * 13180 * <p>This method can be invoked from outside of the UI thread 13181 * only when this View is attached to a window.</p> 13182 * 13183 * @see #invalidate() 13184 */ 13185 public void postInvalidateOnAnimation() { 13186 // We try only with the AttachInfo because there's no point in invalidating 13187 // if we are not attached to our window 13188 final AttachInfo attachInfo = mAttachInfo; 13189 if (attachInfo != null) { 13190 attachInfo.mViewRootImpl.dispatchInvalidateOnAnimation(this); 13191 } 13192 } 13193 13194 /** 13195 * <p>Cause an invalidate of the specified area to happen on the next animation 13196 * time step, typically the next display frame.</p> 13197 * 13198 * <p>This method can be invoked from outside of the UI thread 13199 * only when this View is attached to a window.</p> 13200 * 13201 * @param left The left coordinate of the rectangle to invalidate. 13202 * @param top The top coordinate of the rectangle to invalidate. 13203 * @param right The right coordinate of the rectangle to invalidate. 13204 * @param bottom The bottom coordinate of the rectangle to invalidate. 13205 * 13206 * @see #invalidate(int, int, int, int) 13207 * @see #invalidate(Rect) 13208 */ 13209 public void postInvalidateOnAnimation(int left, int top, int right, int bottom) { 13210 // We try only with the AttachInfo because there's no point in invalidating 13211 // if we are not attached to our window 13212 final AttachInfo attachInfo = mAttachInfo; 13213 if (attachInfo != null) { 13214 final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.obtain(); 13215 info.target = this; 13216 info.left = left; 13217 info.top = top; 13218 info.right = right; 13219 info.bottom = bottom; 13220 13221 attachInfo.mViewRootImpl.dispatchInvalidateRectOnAnimation(info); 13222 } 13223 } 13224 13225 /** 13226 * Post a callback to send a {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} event. 13227 * This event is sent at most once every 13228 * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()}. 13229 */ 13230 private void postSendViewScrolledAccessibilityEventCallback() { 13231 if (mSendViewScrolledAccessibilityEvent == null) { 13232 mSendViewScrolledAccessibilityEvent = new SendViewScrolledAccessibilityEvent(); 13233 } 13234 if (!mSendViewScrolledAccessibilityEvent.mIsPending) { 13235 mSendViewScrolledAccessibilityEvent.mIsPending = true; 13236 postDelayed(mSendViewScrolledAccessibilityEvent, 13237 ViewConfiguration.getSendRecurringAccessibilityEventsInterval()); 13238 } 13239 } 13240 13241 /** 13242 * Called by a parent to request that a child update its values for mScrollX 13243 * and mScrollY if necessary. This will typically be done if the child is 13244 * animating a scroll using a {@link android.widget.Scroller Scroller} 13245 * object. 13246 */ 13247 public void computeScroll() { 13248 } 13249 13250 /** 13251 * <p>Indicate whether the horizontal edges are faded when the view is 13252 * scrolled horizontally.</p> 13253 * 13254 * @return true if the horizontal edges should are faded on scroll, false 13255 * otherwise 13256 * 13257 * @see #setHorizontalFadingEdgeEnabled(boolean) 13258 * 13259 * @attr ref android.R.styleable#View_requiresFadingEdge 13260 */ 13261 public boolean isHorizontalFadingEdgeEnabled() { 13262 return (mViewFlags & FADING_EDGE_HORIZONTAL) == FADING_EDGE_HORIZONTAL; 13263 } 13264 13265 /** 13266 * <p>Define whether the horizontal edges should be faded when this view 13267 * is scrolled horizontally.</p> 13268 * 13269 * @param horizontalFadingEdgeEnabled true if the horizontal edges should 13270 * be faded when the view is scrolled 13271 * horizontally 13272 * 13273 * @see #isHorizontalFadingEdgeEnabled() 13274 * 13275 * @attr ref android.R.styleable#View_requiresFadingEdge 13276 */ 13277 public void setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) { 13278 if (isHorizontalFadingEdgeEnabled() != horizontalFadingEdgeEnabled) { 13279 if (horizontalFadingEdgeEnabled) { 13280 initScrollCache(); 13281 } 13282 13283 mViewFlags ^= FADING_EDGE_HORIZONTAL; 13284 } 13285 } 13286 13287 /** 13288 * <p>Indicate whether the vertical edges are faded when the view is 13289 * scrolled horizontally.</p> 13290 * 13291 * @return true if the vertical edges should are faded on scroll, false 13292 * otherwise 13293 * 13294 * @see #setVerticalFadingEdgeEnabled(boolean) 13295 * 13296 * @attr ref android.R.styleable#View_requiresFadingEdge 13297 */ 13298 public boolean isVerticalFadingEdgeEnabled() { 13299 return (mViewFlags & FADING_EDGE_VERTICAL) == FADING_EDGE_VERTICAL; 13300 } 13301 13302 /** 13303 * <p>Define whether the vertical edges should be faded when this view 13304 * is scrolled vertically.</p> 13305 * 13306 * @param verticalFadingEdgeEnabled true if the vertical edges should 13307 * be faded when the view is scrolled 13308 * vertically 13309 * 13310 * @see #isVerticalFadingEdgeEnabled() 13311 * 13312 * @attr ref android.R.styleable#View_requiresFadingEdge 13313 */ 13314 public void setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) { 13315 if (isVerticalFadingEdgeEnabled() != verticalFadingEdgeEnabled) { 13316 if (verticalFadingEdgeEnabled) { 13317 initScrollCache(); 13318 } 13319 13320 mViewFlags ^= FADING_EDGE_VERTICAL; 13321 } 13322 } 13323 13324 /** 13325 * Returns the strength, or intensity, of the top faded edge. The strength is 13326 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 13327 * returns 0.0 or 1.0 but no value in between. 13328 * 13329 * Subclasses should override this method to provide a smoother fade transition 13330 * when scrolling occurs. 13331 * 13332 * @return the intensity of the top fade as a float between 0.0f and 1.0f 13333 */ 13334 protected float getTopFadingEdgeStrength() { 13335 return computeVerticalScrollOffset() > 0 ? 1.0f : 0.0f; 13336 } 13337 13338 /** 13339 * Returns the strength, or intensity, of the bottom faded edge. The strength is 13340 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 13341 * returns 0.0 or 1.0 but no value in between. 13342 * 13343 * Subclasses should override this method to provide a smoother fade transition 13344 * when scrolling occurs. 13345 * 13346 * @return the intensity of the bottom fade as a float between 0.0f and 1.0f 13347 */ 13348 protected float getBottomFadingEdgeStrength() { 13349 return computeVerticalScrollOffset() + computeVerticalScrollExtent() < 13350 computeVerticalScrollRange() ? 1.0f : 0.0f; 13351 } 13352 13353 /** 13354 * Returns the strength, or intensity, of the left faded edge. The strength is 13355 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 13356 * returns 0.0 or 1.0 but no value in between. 13357 * 13358 * Subclasses should override this method to provide a smoother fade transition 13359 * when scrolling occurs. 13360 * 13361 * @return the intensity of the left fade as a float between 0.0f and 1.0f 13362 */ 13363 protected float getLeftFadingEdgeStrength() { 13364 return computeHorizontalScrollOffset() > 0 ? 1.0f : 0.0f; 13365 } 13366 13367 /** 13368 * Returns the strength, or intensity, of the right faded edge. The strength is 13369 * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation 13370 * returns 0.0 or 1.0 but no value in between. 13371 * 13372 * Subclasses should override this method to provide a smoother fade transition 13373 * when scrolling occurs. 13374 * 13375 * @return the intensity of the right fade as a float between 0.0f and 1.0f 13376 */ 13377 protected float getRightFadingEdgeStrength() { 13378 return computeHorizontalScrollOffset() + computeHorizontalScrollExtent() < 13379 computeHorizontalScrollRange() ? 1.0f : 0.0f; 13380 } 13381 13382 /** 13383 * <p>Indicate whether the horizontal scrollbar should be drawn or not. The 13384 * scrollbar is not drawn by default.</p> 13385 * 13386 * @return true if the horizontal scrollbar should be painted, false 13387 * otherwise 13388 * 13389 * @see #setHorizontalScrollBarEnabled(boolean) 13390 */ 13391 public boolean isHorizontalScrollBarEnabled() { 13392 return (mViewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; 13393 } 13394 13395 /** 13396 * <p>Define whether the horizontal scrollbar should be drawn or not. The 13397 * scrollbar is not drawn by default.</p> 13398 * 13399 * @param horizontalScrollBarEnabled true if the horizontal scrollbar should 13400 * be painted 13401 * 13402 * @see #isHorizontalScrollBarEnabled() 13403 */ 13404 public void setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) { 13405 if (isHorizontalScrollBarEnabled() != horizontalScrollBarEnabled) { 13406 mViewFlags ^= SCROLLBARS_HORIZONTAL; 13407 computeOpaqueFlags(); 13408 resolvePadding(); 13409 } 13410 } 13411 13412 /** 13413 * <p>Indicate whether the vertical scrollbar should be drawn or not. The 13414 * scrollbar is not drawn by default.</p> 13415 * 13416 * @return true if the vertical scrollbar should be painted, false 13417 * otherwise 13418 * 13419 * @see #setVerticalScrollBarEnabled(boolean) 13420 */ 13421 public boolean isVerticalScrollBarEnabled() { 13422 return (mViewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL; 13423 } 13424 13425 /** 13426 * <p>Define whether the vertical scrollbar should be drawn or not. The 13427 * scrollbar is not drawn by default.</p> 13428 * 13429 * @param verticalScrollBarEnabled true if the vertical scrollbar should 13430 * be painted 13431 * 13432 * @see #isVerticalScrollBarEnabled() 13433 */ 13434 public void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) { 13435 if (isVerticalScrollBarEnabled() != verticalScrollBarEnabled) { 13436 mViewFlags ^= SCROLLBARS_VERTICAL; 13437 computeOpaqueFlags(); 13438 resolvePadding(); 13439 } 13440 } 13441 13442 /** 13443 * @hide 13444 */ 13445 protected void recomputePadding() { 13446 internalSetPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); 13447 } 13448 13449 /** 13450 * Define whether scrollbars will fade when the view is not scrolling. 13451 * 13452 * @param fadeScrollbars whether to enable fading 13453 * 13454 * @attr ref android.R.styleable#View_fadeScrollbars 13455 */ 13456 public void setScrollbarFadingEnabled(boolean fadeScrollbars) { 13457 initScrollCache(); 13458 final ScrollabilityCache scrollabilityCache = mScrollCache; 13459 scrollabilityCache.fadeScrollBars = fadeScrollbars; 13460 if (fadeScrollbars) { 13461 scrollabilityCache.state = ScrollabilityCache.OFF; 13462 } else { 13463 scrollabilityCache.state = ScrollabilityCache.ON; 13464 } 13465 } 13466 13467 /** 13468 * 13469 * Returns true if scrollbars will fade when this view is not scrolling 13470 * 13471 * @return true if scrollbar fading is enabled 13472 * 13473 * @attr ref android.R.styleable#View_fadeScrollbars 13474 */ 13475 public boolean isScrollbarFadingEnabled() { 13476 return mScrollCache != null && mScrollCache.fadeScrollBars; 13477 } 13478 13479 /** 13480 * 13481 * Returns the delay before scrollbars fade. 13482 * 13483 * @return the delay before scrollbars fade 13484 * 13485 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 13486 */ 13487 public int getScrollBarDefaultDelayBeforeFade() { 13488 return mScrollCache == null ? ViewConfiguration.getScrollDefaultDelay() : 13489 mScrollCache.scrollBarDefaultDelayBeforeFade; 13490 } 13491 13492 /** 13493 * Define the delay before scrollbars fade. 13494 * 13495 * @param scrollBarDefaultDelayBeforeFade - the delay before scrollbars fade 13496 * 13497 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 13498 */ 13499 public void setScrollBarDefaultDelayBeforeFade(int scrollBarDefaultDelayBeforeFade) { 13500 getScrollCache().scrollBarDefaultDelayBeforeFade = scrollBarDefaultDelayBeforeFade; 13501 } 13502 13503 /** 13504 * 13505 * Returns the scrollbar fade duration. 13506 * 13507 * @return the scrollbar fade duration 13508 * 13509 * @attr ref android.R.styleable#View_scrollbarFadeDuration 13510 */ 13511 public int getScrollBarFadeDuration() { 13512 return mScrollCache == null ? ViewConfiguration.getScrollBarFadeDuration() : 13513 mScrollCache.scrollBarFadeDuration; 13514 } 13515 13516 /** 13517 * Define the scrollbar fade duration. 13518 * 13519 * @param scrollBarFadeDuration - the scrollbar fade duration 13520 * 13521 * @attr ref android.R.styleable#View_scrollbarFadeDuration 13522 */ 13523 public void setScrollBarFadeDuration(int scrollBarFadeDuration) { 13524 getScrollCache().scrollBarFadeDuration = scrollBarFadeDuration; 13525 } 13526 13527 /** 13528 * 13529 * Returns the scrollbar size. 13530 * 13531 * @return the scrollbar size 13532 * 13533 * @attr ref android.R.styleable#View_scrollbarSize 13534 */ 13535 public int getScrollBarSize() { 13536 return mScrollCache == null ? ViewConfiguration.get(mContext).getScaledScrollBarSize() : 13537 mScrollCache.scrollBarSize; 13538 } 13539 13540 /** 13541 * Define the scrollbar size. 13542 * 13543 * @param scrollBarSize - the scrollbar size 13544 * 13545 * @attr ref android.R.styleable#View_scrollbarSize 13546 */ 13547 public void setScrollBarSize(int scrollBarSize) { 13548 getScrollCache().scrollBarSize = scrollBarSize; 13549 } 13550 13551 /** 13552 * <p>Specify the style of the scrollbars. The scrollbars can be overlaid or 13553 * inset. When inset, they add to the padding of the view. And the scrollbars 13554 * can be drawn inside the padding area or on the edge of the view. For example, 13555 * if a view has a background drawable and you want to draw the scrollbars 13556 * inside the padding specified by the drawable, you can use 13557 * SCROLLBARS_INSIDE_OVERLAY or SCROLLBARS_INSIDE_INSET. If you want them to 13558 * appear at the edge of the view, ignoring the padding, then you can use 13559 * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.</p> 13560 * @param style the style of the scrollbars. Should be one of 13561 * SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, 13562 * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET. 13563 * @see #SCROLLBARS_INSIDE_OVERLAY 13564 * @see #SCROLLBARS_INSIDE_INSET 13565 * @see #SCROLLBARS_OUTSIDE_OVERLAY 13566 * @see #SCROLLBARS_OUTSIDE_INSET 13567 * 13568 * @attr ref android.R.styleable#View_scrollbarStyle 13569 */ 13570 public void setScrollBarStyle(@ScrollBarStyle int style) { 13571 if (style != (mViewFlags & SCROLLBARS_STYLE_MASK)) { 13572 mViewFlags = (mViewFlags & ~SCROLLBARS_STYLE_MASK) | (style & SCROLLBARS_STYLE_MASK); 13573 computeOpaqueFlags(); 13574 resolvePadding(); 13575 } 13576 } 13577 13578 /** 13579 * <p>Returns the current scrollbar style.</p> 13580 * @return the current scrollbar style 13581 * @see #SCROLLBARS_INSIDE_OVERLAY 13582 * @see #SCROLLBARS_INSIDE_INSET 13583 * @see #SCROLLBARS_OUTSIDE_OVERLAY 13584 * @see #SCROLLBARS_OUTSIDE_INSET 13585 * 13586 * @attr ref android.R.styleable#View_scrollbarStyle 13587 */ 13588 @ViewDebug.ExportedProperty(mapping = { 13589 @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_OVERLAY, to = "INSIDE_OVERLAY"), 13590 @ViewDebug.IntToString(from = SCROLLBARS_INSIDE_INSET, to = "INSIDE_INSET"), 13591 @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_OVERLAY, to = "OUTSIDE_OVERLAY"), 13592 @ViewDebug.IntToString(from = SCROLLBARS_OUTSIDE_INSET, to = "OUTSIDE_INSET") 13593 }) 13594 @ScrollBarStyle 13595 public int getScrollBarStyle() { 13596 return mViewFlags & SCROLLBARS_STYLE_MASK; 13597 } 13598 13599 /** 13600 * <p>Compute the horizontal range that the horizontal scrollbar 13601 * represents.</p> 13602 * 13603 * <p>The range is expressed in arbitrary units that must be the same as the 13604 * units used by {@link #computeHorizontalScrollExtent()} and 13605 * {@link #computeHorizontalScrollOffset()}.</p> 13606 * 13607 * <p>The default range is the drawing width of this view.</p> 13608 * 13609 * @return the total horizontal range represented by the horizontal 13610 * scrollbar 13611 * 13612 * @see #computeHorizontalScrollExtent() 13613 * @see #computeHorizontalScrollOffset() 13614 * @see android.widget.ScrollBarDrawable 13615 */ 13616 protected int computeHorizontalScrollRange() { 13617 return getWidth(); 13618 } 13619 13620 /** 13621 * <p>Compute the horizontal offset of the horizontal scrollbar's thumb 13622 * within the horizontal range. This value is used to compute the position 13623 * of the thumb within the scrollbar's track.</p> 13624 * 13625 * <p>The range is expressed in arbitrary units that must be the same as the 13626 * units used by {@link #computeHorizontalScrollRange()} and 13627 * {@link #computeHorizontalScrollExtent()}.</p> 13628 * 13629 * <p>The default offset is the scroll offset of this view.</p> 13630 * 13631 * @return the horizontal offset of the scrollbar's thumb 13632 * 13633 * @see #computeHorizontalScrollRange() 13634 * @see #computeHorizontalScrollExtent() 13635 * @see android.widget.ScrollBarDrawable 13636 */ 13637 protected int computeHorizontalScrollOffset() { 13638 return mScrollX; 13639 } 13640 13641 /** 13642 * <p>Compute the horizontal extent of the horizontal scrollbar's thumb 13643 * within the horizontal range. This value is used to compute the length 13644 * of the thumb within the scrollbar's track.</p> 13645 * 13646 * <p>The range is expressed in arbitrary units that must be the same as the 13647 * units used by {@link #computeHorizontalScrollRange()} and 13648 * {@link #computeHorizontalScrollOffset()}.</p> 13649 * 13650 * <p>The default extent is the drawing width of this view.</p> 13651 * 13652 * @return the horizontal extent of the scrollbar's thumb 13653 * 13654 * @see #computeHorizontalScrollRange() 13655 * @see #computeHorizontalScrollOffset() 13656 * @see android.widget.ScrollBarDrawable 13657 */ 13658 protected int computeHorizontalScrollExtent() { 13659 return getWidth(); 13660 } 13661 13662 /** 13663 * <p>Compute the vertical range that the vertical scrollbar represents.</p> 13664 * 13665 * <p>The range is expressed in arbitrary units that must be the same as the 13666 * units used by {@link #computeVerticalScrollExtent()} and 13667 * {@link #computeVerticalScrollOffset()}.</p> 13668 * 13669 * @return the total vertical range represented by the vertical scrollbar 13670 * 13671 * <p>The default range is the drawing height of this view.</p> 13672 * 13673 * @see #computeVerticalScrollExtent() 13674 * @see #computeVerticalScrollOffset() 13675 * @see android.widget.ScrollBarDrawable 13676 */ 13677 protected int computeVerticalScrollRange() { 13678 return getHeight(); 13679 } 13680 13681 /** 13682 * <p>Compute the vertical offset of the vertical scrollbar's thumb 13683 * within the horizontal range. This value is used to compute the position 13684 * of the thumb within the scrollbar's track.</p> 13685 * 13686 * <p>The range is expressed in arbitrary units that must be the same as the 13687 * units used by {@link #computeVerticalScrollRange()} and 13688 * {@link #computeVerticalScrollExtent()}.</p> 13689 * 13690 * <p>The default offset is the scroll offset of this view.</p> 13691 * 13692 * @return the vertical offset of the scrollbar's thumb 13693 * 13694 * @see #computeVerticalScrollRange() 13695 * @see #computeVerticalScrollExtent() 13696 * @see android.widget.ScrollBarDrawable 13697 */ 13698 protected int computeVerticalScrollOffset() { 13699 return mScrollY; 13700 } 13701 13702 /** 13703 * <p>Compute the vertical extent of the vertical scrollbar's thumb 13704 * within the vertical range. This value is used to compute the length 13705 * of the thumb within the scrollbar's track.</p> 13706 * 13707 * <p>The range is expressed in arbitrary units that must be the same as the 13708 * units used by {@link #computeVerticalScrollRange()} and 13709 * {@link #computeVerticalScrollOffset()}.</p> 13710 * 13711 * <p>The default extent is the drawing height of this view.</p> 13712 * 13713 * @return the vertical extent of the scrollbar's thumb 13714 * 13715 * @see #computeVerticalScrollRange() 13716 * @see #computeVerticalScrollOffset() 13717 * @see android.widget.ScrollBarDrawable 13718 */ 13719 protected int computeVerticalScrollExtent() { 13720 return getHeight(); 13721 } 13722 13723 /** 13724 * Check if this view can be scrolled horizontally in a certain direction. 13725 * 13726 * @param direction Negative to check scrolling left, positive to check scrolling right. 13727 * @return true if this view can be scrolled in the specified direction, false otherwise. 13728 */ 13729 public boolean canScrollHorizontally(int direction) { 13730 final int offset = computeHorizontalScrollOffset(); 13731 final int range = computeHorizontalScrollRange() - computeHorizontalScrollExtent(); 13732 if (range == 0) return false; 13733 if (direction < 0) { 13734 return offset > 0; 13735 } else { 13736 return offset < range - 1; 13737 } 13738 } 13739 13740 /** 13741 * Check if this view can be scrolled vertically in a certain direction. 13742 * 13743 * @param direction Negative to check scrolling up, positive to check scrolling down. 13744 * @return true if this view can be scrolled in the specified direction, false otherwise. 13745 */ 13746 public boolean canScrollVertically(int direction) { 13747 final int offset = computeVerticalScrollOffset(); 13748 final int range = computeVerticalScrollRange() - computeVerticalScrollExtent(); 13749 if (range == 0) return false; 13750 if (direction < 0) { 13751 return offset > 0; 13752 } else { 13753 return offset < range - 1; 13754 } 13755 } 13756 13757 void getScrollIndicatorBounds(@NonNull Rect out) { 13758 out.left = mScrollX; 13759 out.right = mScrollX + mRight - mLeft; 13760 out.top = mScrollY; 13761 out.bottom = mScrollY + mBottom - mTop; 13762 } 13763 13764 private void onDrawScrollIndicators(Canvas c) { 13765 if ((mPrivateFlags3 & SCROLL_INDICATORS_PFLAG3_MASK) == 0) { 13766 // No scroll indicators enabled. 13767 return; 13768 } 13769 13770 final Drawable dr = mScrollIndicatorDrawable; 13771 if (dr == null) { 13772 // Scroll indicators aren't supported here. 13773 return; 13774 } 13775 13776 final int h = dr.getIntrinsicHeight(); 13777 final int w = dr.getIntrinsicWidth(); 13778 final Rect rect = mAttachInfo.mTmpInvalRect; 13779 getScrollIndicatorBounds(rect); 13780 13781 if ((mPrivateFlags3 & PFLAG3_SCROLL_INDICATOR_TOP) != 0) { 13782 final boolean canScrollUp = canScrollVertically(-1); 13783 if (canScrollUp) { 13784 dr.setBounds(rect.left, rect.top, rect.right, rect.top + h); 13785 dr.draw(c); 13786 } 13787 } 13788 13789 if ((mPrivateFlags3 & PFLAG3_SCROLL_INDICATOR_BOTTOM) != 0) { 13790 final boolean canScrollDown = canScrollVertically(1); 13791 if (canScrollDown) { 13792 dr.setBounds(rect.left, rect.bottom - h, rect.right, rect.bottom); 13793 dr.draw(c); 13794 } 13795 } 13796 13797 final int leftRtl; 13798 final int rightRtl; 13799 if (getLayoutDirection() == LAYOUT_DIRECTION_RTL) { 13800 leftRtl = PFLAG3_SCROLL_INDICATOR_END; 13801 rightRtl = PFLAG3_SCROLL_INDICATOR_START; 13802 } else { 13803 leftRtl = PFLAG3_SCROLL_INDICATOR_START; 13804 rightRtl = PFLAG3_SCROLL_INDICATOR_END; 13805 } 13806 13807 final int leftMask = PFLAG3_SCROLL_INDICATOR_LEFT | leftRtl; 13808 if ((mPrivateFlags3 & leftMask) != 0) { 13809 final boolean canScrollLeft = canScrollHorizontally(-1); 13810 if (canScrollLeft) { 13811 dr.setBounds(rect.left, rect.top, rect.left + w, rect.bottom); 13812 dr.draw(c); 13813 } 13814 } 13815 13816 final int rightMask = PFLAG3_SCROLL_INDICATOR_RIGHT | rightRtl; 13817 if ((mPrivateFlags3 & rightMask) != 0) { 13818 final boolean canScrollRight = canScrollHorizontally(1); 13819 if (canScrollRight) { 13820 dr.setBounds(rect.right - w, rect.top, rect.right, rect.bottom); 13821 dr.draw(c); 13822 } 13823 } 13824 } 13825 13826 /** 13827 * <p>Request the drawing of the horizontal and the vertical scrollbar. The 13828 * scrollbars are painted only if they have been awakened first.</p> 13829 * 13830 * @param canvas the canvas on which to draw the scrollbars 13831 * 13832 * @see #awakenScrollBars(int) 13833 */ 13834 protected final void onDrawScrollBars(Canvas canvas) { 13835 // scrollbars are drawn only when the animation is running 13836 final ScrollabilityCache cache = mScrollCache; 13837 if (cache != null) { 13838 13839 int state = cache.state; 13840 13841 if (state == ScrollabilityCache.OFF) { 13842 return; 13843 } 13844 13845 boolean invalidate = false; 13846 13847 if (state == ScrollabilityCache.FADING) { 13848 // We're fading -- get our fade interpolation 13849 if (cache.interpolatorValues == null) { 13850 cache.interpolatorValues = new float[1]; 13851 } 13852 13853 float[] values = cache.interpolatorValues; 13854 13855 // Stops the animation if we're done 13856 if (cache.scrollBarInterpolator.timeToValues(values) == 13857 Interpolator.Result.FREEZE_END) { 13858 cache.state = ScrollabilityCache.OFF; 13859 } else { 13860 cache.scrollBar.mutate().setAlpha(Math.round(values[0])); 13861 } 13862 13863 // This will make the scroll bars inval themselves after 13864 // drawing. We only want this when we're fading so that 13865 // we prevent excessive redraws 13866 invalidate = true; 13867 } else { 13868 // We're just on -- but we may have been fading before so 13869 // reset alpha 13870 cache.scrollBar.mutate().setAlpha(255); 13871 } 13872 13873 13874 final int viewFlags = mViewFlags; 13875 13876 final boolean drawHorizontalScrollBar = 13877 (viewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; 13878 final boolean drawVerticalScrollBar = 13879 (viewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL 13880 && !isVerticalScrollBarHidden(); 13881 13882 if (drawVerticalScrollBar || drawHorizontalScrollBar) { 13883 final int width = mRight - mLeft; 13884 final int height = mBottom - mTop; 13885 13886 final ScrollBarDrawable scrollBar = cache.scrollBar; 13887 13888 final int scrollX = mScrollX; 13889 final int scrollY = mScrollY; 13890 final int inside = (viewFlags & SCROLLBARS_OUTSIDE_MASK) == 0 ? ~0 : 0; 13891 13892 int left; 13893 int top; 13894 int right; 13895 int bottom; 13896 13897 if (drawHorizontalScrollBar) { 13898 int size = scrollBar.getSize(false); 13899 if (size <= 0) { 13900 size = cache.scrollBarSize; 13901 } 13902 13903 scrollBar.setParameters(computeHorizontalScrollRange(), 13904 computeHorizontalScrollOffset(), 13905 computeHorizontalScrollExtent(), false); 13906 final int verticalScrollBarGap = drawVerticalScrollBar ? 13907 getVerticalScrollbarWidth() : 0; 13908 top = scrollY + height - size - (mUserPaddingBottom & inside); 13909 left = scrollX + (mPaddingLeft & inside); 13910 right = scrollX + width - (mUserPaddingRight & inside) - verticalScrollBarGap; 13911 bottom = top + size; 13912 onDrawHorizontalScrollBar(canvas, scrollBar, left, top, right, bottom); 13913 if (invalidate) { 13914 invalidate(left, top, right, bottom); 13915 } 13916 } 13917 13918 if (drawVerticalScrollBar) { 13919 int size = scrollBar.getSize(true); 13920 if (size <= 0) { 13921 size = cache.scrollBarSize; 13922 } 13923 13924 scrollBar.setParameters(computeVerticalScrollRange(), 13925 computeVerticalScrollOffset(), 13926 computeVerticalScrollExtent(), true); 13927 int verticalScrollbarPosition = mVerticalScrollbarPosition; 13928 if (verticalScrollbarPosition == SCROLLBAR_POSITION_DEFAULT) { 13929 verticalScrollbarPosition = isLayoutRtl() ? 13930 SCROLLBAR_POSITION_LEFT : SCROLLBAR_POSITION_RIGHT; 13931 } 13932 switch (verticalScrollbarPosition) { 13933 default: 13934 case SCROLLBAR_POSITION_RIGHT: 13935 left = scrollX + width - size - (mUserPaddingRight & inside); 13936 break; 13937 case SCROLLBAR_POSITION_LEFT: 13938 left = scrollX + (mUserPaddingLeft & inside); 13939 break; 13940 } 13941 top = scrollY + (mPaddingTop & inside); 13942 right = left + size; 13943 bottom = scrollY + height - (mUserPaddingBottom & inside); 13944 onDrawVerticalScrollBar(canvas, scrollBar, left, top, right, bottom); 13945 if (invalidate) { 13946 invalidate(left, top, right, bottom); 13947 } 13948 } 13949 } 13950 } 13951 } 13952 13953 /** 13954 * Override this if the vertical scrollbar needs to be hidden in a subclass, like when 13955 * FastScroller is visible. 13956 * @return whether to temporarily hide the vertical scrollbar 13957 * @hide 13958 */ 13959 protected boolean isVerticalScrollBarHidden() { 13960 return false; 13961 } 13962 13963 /** 13964 * <p>Draw the horizontal scrollbar if 13965 * {@link #isHorizontalScrollBarEnabled()} returns true.</p> 13966 * 13967 * @param canvas the canvas on which to draw the scrollbar 13968 * @param scrollBar the scrollbar's drawable 13969 * 13970 * @see #isHorizontalScrollBarEnabled() 13971 * @see #computeHorizontalScrollRange() 13972 * @see #computeHorizontalScrollExtent() 13973 * @see #computeHorizontalScrollOffset() 13974 * @see android.widget.ScrollBarDrawable 13975 * @hide 13976 */ 13977 protected void onDrawHorizontalScrollBar(Canvas canvas, Drawable scrollBar, 13978 int l, int t, int r, int b) { 13979 scrollBar.setBounds(l, t, r, b); 13980 scrollBar.draw(canvas); 13981 } 13982 13983 /** 13984 * <p>Draw the vertical scrollbar if {@link #isVerticalScrollBarEnabled()} 13985 * returns true.</p> 13986 * 13987 * @param canvas the canvas on which to draw the scrollbar 13988 * @param scrollBar the scrollbar's drawable 13989 * 13990 * @see #isVerticalScrollBarEnabled() 13991 * @see #computeVerticalScrollRange() 13992 * @see #computeVerticalScrollExtent() 13993 * @see #computeVerticalScrollOffset() 13994 * @see android.widget.ScrollBarDrawable 13995 * @hide 13996 */ 13997 protected void onDrawVerticalScrollBar(Canvas canvas, Drawable scrollBar, 13998 int l, int t, int r, int b) { 13999 scrollBar.setBounds(l, t, r, b); 14000 scrollBar.draw(canvas); 14001 } 14002 14003 /** 14004 * Implement this to do your drawing. 14005 * 14006 * @param canvas the canvas on which the background will be drawn 14007 */ 14008 protected void onDraw(Canvas canvas) { 14009 } 14010 14011 /* 14012 * Caller is responsible for calling requestLayout if necessary. 14013 * (This allows addViewInLayout to not request a new layout.) 14014 */ 14015 void assignParent(ViewParent parent) { 14016 if (mParent == null) { 14017 mParent = parent; 14018 } else if (parent == null) { 14019 mParent = null; 14020 } else { 14021 throw new RuntimeException("view " + this + " being added, but" 14022 + " it already has a parent"); 14023 } 14024 } 14025 14026 /** 14027 * This is called when the view is attached to a window. At this point it 14028 * has a Surface and will start drawing. Note that this function is 14029 * guaranteed to be called before {@link #onDraw(android.graphics.Canvas)}, 14030 * however it may be called any time before the first onDraw -- including 14031 * before or after {@link #onMeasure(int, int)}. 14032 * 14033 * @see #onDetachedFromWindow() 14034 */ 14035 @CallSuper 14036 protected void onAttachedToWindow() { 14037 if ((mPrivateFlags & PFLAG_REQUEST_TRANSPARENT_REGIONS) != 0) { 14038 mParent.requestTransparentRegion(this); 14039 } 14040 14041 mPrivateFlags3 &= ~PFLAG3_IS_LAID_OUT; 14042 14043 jumpDrawablesToCurrentState(); 14044 14045 resetSubtreeAccessibilityStateChanged(); 14046 14047 // rebuild, since Outline not maintained while View is detached 14048 rebuildOutline(); 14049 14050 if (isFocused()) { 14051 InputMethodManager imm = InputMethodManager.peekInstance(); 14052 if (imm != null) { 14053 imm.focusIn(this); 14054 } 14055 } 14056 } 14057 14058 /** 14059 * Resolve all RTL related properties. 14060 * 14061 * @return true if resolution of RTL properties has been done 14062 * 14063 * @hide 14064 */ 14065 public boolean resolveRtlPropertiesIfNeeded() { 14066 if (!needRtlPropertiesResolution()) return false; 14067 14068 // Order is important here: LayoutDirection MUST be resolved first 14069 if (!isLayoutDirectionResolved()) { 14070 resolveLayoutDirection(); 14071 resolveLayoutParams(); 14072 } 14073 // ... then we can resolve the others properties depending on the resolved LayoutDirection. 14074 if (!isTextDirectionResolved()) { 14075 resolveTextDirection(); 14076 } 14077 if (!isTextAlignmentResolved()) { 14078 resolveTextAlignment(); 14079 } 14080 // Should resolve Drawables before Padding because we need the layout direction of the 14081 // Drawable to correctly resolve Padding. 14082 if (!areDrawablesResolved()) { 14083 resolveDrawables(); 14084 } 14085 if (!isPaddingResolved()) { 14086 resolvePadding(); 14087 } 14088 onRtlPropertiesChanged(getLayoutDirection()); 14089 return true; 14090 } 14091 14092 /** 14093 * Reset resolution of all RTL related properties. 14094 * 14095 * @hide 14096 */ 14097 public void resetRtlProperties() { 14098 resetResolvedLayoutDirection(); 14099 resetResolvedTextDirection(); 14100 resetResolvedTextAlignment(); 14101 resetResolvedPadding(); 14102 resetResolvedDrawables(); 14103 } 14104 14105 /** 14106 * @see #onScreenStateChanged(int) 14107 */ 14108 void dispatchScreenStateChanged(int screenState) { 14109 onScreenStateChanged(screenState); 14110 } 14111 14112 /** 14113 * This method is called whenever the state of the screen this view is 14114 * attached to changes. A state change will usually occurs when the screen 14115 * turns on or off (whether it happens automatically or the user does it 14116 * manually.) 14117 * 14118 * @param screenState The new state of the screen. Can be either 14119 * {@link #SCREEN_STATE_ON} or {@link #SCREEN_STATE_OFF} 14120 */ 14121 public void onScreenStateChanged(int screenState) { 14122 } 14123 14124 /** 14125 * Return true if the application tag in the AndroidManifest has set "supportRtl" to true 14126 */ 14127 private boolean hasRtlSupport() { 14128 return mContext.getApplicationInfo().hasRtlSupport(); 14129 } 14130 14131 /** 14132 * Return true if we are in RTL compatibility mode (either before Jelly Bean MR1 or 14133 * RTL not supported) 14134 */ 14135 private boolean isRtlCompatibilityMode() { 14136 final int targetSdkVersion = getContext().getApplicationInfo().targetSdkVersion; 14137 return targetSdkVersion < JELLY_BEAN_MR1 || !hasRtlSupport(); 14138 } 14139 14140 /** 14141 * @return true if RTL properties need resolution. 14142 * 14143 */ 14144 private boolean needRtlPropertiesResolution() { 14145 return (mPrivateFlags2 & ALL_RTL_PROPERTIES_RESOLVED) != ALL_RTL_PROPERTIES_RESOLVED; 14146 } 14147 14148 /** 14149 * Called when any RTL property (layout direction or text direction or text alignment) has 14150 * been changed. 14151 * 14152 * Subclasses need to override this method to take care of cached information that depends on the 14153 * resolved layout direction, or to inform child views that inherit their layout direction. 14154 * 14155 * The default implementation does nothing. 14156 * 14157 * @param layoutDirection the direction of the layout 14158 * 14159 * @see #LAYOUT_DIRECTION_LTR 14160 * @see #LAYOUT_DIRECTION_RTL 14161 */ 14162 public void onRtlPropertiesChanged(@ResolvedLayoutDir int layoutDirection) { 14163 } 14164 14165 /** 14166 * Resolve and cache the layout direction. LTR is set initially. This is implicitly supposing 14167 * that the parent directionality can and will be resolved before its children. 14168 * 14169 * @return true if resolution has been done, false otherwise. 14170 * 14171 * @hide 14172 */ 14173 public boolean resolveLayoutDirection() { 14174 // Clear any previous layout direction resolution 14175 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK; 14176 14177 if (hasRtlSupport()) { 14178 // Set resolved depending on layout direction 14179 switch ((mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_MASK) >> 14180 PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) { 14181 case LAYOUT_DIRECTION_INHERIT: 14182 // We cannot resolve yet. LTR is by default and let the resolution happen again 14183 // later to get the correct resolved value 14184 if (!canResolveLayoutDirection()) return false; 14185 14186 // Parent has not yet resolved, LTR is still the default 14187 try { 14188 if (!mParent.isLayoutDirectionResolved()) return false; 14189 14190 if (mParent.getLayoutDirection() == LAYOUT_DIRECTION_RTL) { 14191 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 14192 } 14193 } catch (AbstractMethodError e) { 14194 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 14195 " does not fully implement ViewParent", e); 14196 } 14197 break; 14198 case LAYOUT_DIRECTION_RTL: 14199 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 14200 break; 14201 case LAYOUT_DIRECTION_LOCALE: 14202 if((LAYOUT_DIRECTION_RTL == 14203 TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()))) { 14204 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL; 14205 } 14206 break; 14207 default: 14208 // Nothing to do, LTR by default 14209 } 14210 } 14211 14212 // Set to resolved 14213 mPrivateFlags2 |= PFLAG2_LAYOUT_DIRECTION_RESOLVED; 14214 return true; 14215 } 14216 14217 /** 14218 * Check if layout direction resolution can be done. 14219 * 14220 * @return true if layout direction resolution can be done otherwise return false. 14221 */ 14222 public boolean canResolveLayoutDirection() { 14223 switch (getRawLayoutDirection()) { 14224 case LAYOUT_DIRECTION_INHERIT: 14225 if (mParent != null) { 14226 try { 14227 return mParent.canResolveLayoutDirection(); 14228 } catch (AbstractMethodError e) { 14229 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 14230 " does not fully implement ViewParent", e); 14231 } 14232 } 14233 return false; 14234 14235 default: 14236 return true; 14237 } 14238 } 14239 14240 /** 14241 * Reset the resolved layout direction. Layout direction will be resolved during a call to 14242 * {@link #onMeasure(int, int)}. 14243 * 14244 * @hide 14245 */ 14246 public void resetResolvedLayoutDirection() { 14247 // Reset the current resolved bits 14248 mPrivateFlags2 &= ~PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK; 14249 } 14250 14251 /** 14252 * @return true if the layout direction is inherited. 14253 * 14254 * @hide 14255 */ 14256 public boolean isLayoutDirectionInherited() { 14257 return (getRawLayoutDirection() == LAYOUT_DIRECTION_INHERIT); 14258 } 14259 14260 /** 14261 * @return true if layout direction has been resolved. 14262 */ 14263 public boolean isLayoutDirectionResolved() { 14264 return (mPrivateFlags2 & PFLAG2_LAYOUT_DIRECTION_RESOLVED) == PFLAG2_LAYOUT_DIRECTION_RESOLVED; 14265 } 14266 14267 /** 14268 * Return if padding has been resolved 14269 * 14270 * @hide 14271 */ 14272 boolean isPaddingResolved() { 14273 return (mPrivateFlags2 & PFLAG2_PADDING_RESOLVED) == PFLAG2_PADDING_RESOLVED; 14274 } 14275 14276 /** 14277 * Resolves padding depending on layout direction, if applicable, and 14278 * recomputes internal padding values to adjust for scroll bars. 14279 * 14280 * @hide 14281 */ 14282 public void resolvePadding() { 14283 final int resolvedLayoutDirection = getLayoutDirection(); 14284 14285 if (!isRtlCompatibilityMode()) { 14286 // Post Jelly Bean MR1 case: we need to take the resolved layout direction into account. 14287 // If start / end padding are defined, they will be resolved (hence overriding) to 14288 // left / right or right / left depending on the resolved layout direction. 14289 // If start / end padding are not defined, use the left / right ones. 14290 if (mBackground != null && (!mLeftPaddingDefined || !mRightPaddingDefined)) { 14291 Rect padding = sThreadLocal.get(); 14292 if (padding == null) { 14293 padding = new Rect(); 14294 sThreadLocal.set(padding); 14295 } 14296 mBackground.getPadding(padding); 14297 if (!mLeftPaddingDefined) { 14298 mUserPaddingLeftInitial = padding.left; 14299 } 14300 if (!mRightPaddingDefined) { 14301 mUserPaddingRightInitial = padding.right; 14302 } 14303 } 14304 switch (resolvedLayoutDirection) { 14305 case LAYOUT_DIRECTION_RTL: 14306 if (mUserPaddingStart != UNDEFINED_PADDING) { 14307 mUserPaddingRight = mUserPaddingStart; 14308 } else { 14309 mUserPaddingRight = mUserPaddingRightInitial; 14310 } 14311 if (mUserPaddingEnd != UNDEFINED_PADDING) { 14312 mUserPaddingLeft = mUserPaddingEnd; 14313 } else { 14314 mUserPaddingLeft = mUserPaddingLeftInitial; 14315 } 14316 break; 14317 case LAYOUT_DIRECTION_LTR: 14318 default: 14319 if (mUserPaddingStart != UNDEFINED_PADDING) { 14320 mUserPaddingLeft = mUserPaddingStart; 14321 } else { 14322 mUserPaddingLeft = mUserPaddingLeftInitial; 14323 } 14324 if (mUserPaddingEnd != UNDEFINED_PADDING) { 14325 mUserPaddingRight = mUserPaddingEnd; 14326 } else { 14327 mUserPaddingRight = mUserPaddingRightInitial; 14328 } 14329 } 14330 14331 mUserPaddingBottom = (mUserPaddingBottom >= 0) ? mUserPaddingBottom : mPaddingBottom; 14332 } 14333 14334 internalSetPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); 14335 onRtlPropertiesChanged(resolvedLayoutDirection); 14336 14337 mPrivateFlags2 |= PFLAG2_PADDING_RESOLVED; 14338 } 14339 14340 /** 14341 * Reset the resolved layout direction. 14342 * 14343 * @hide 14344 */ 14345 public void resetResolvedPadding() { 14346 resetResolvedPaddingInternal(); 14347 } 14348 14349 /** 14350 * Used when we only want to reset *this* view's padding and not trigger overrides 14351 * in ViewGroup that reset children too. 14352 */ 14353 void resetResolvedPaddingInternal() { 14354 mPrivateFlags2 &= ~PFLAG2_PADDING_RESOLVED; 14355 } 14356 14357 /** 14358 * This is called when the view is detached from a window. At this point it 14359 * no longer has a surface for drawing. 14360 * 14361 * @see #onAttachedToWindow() 14362 */ 14363 @CallSuper 14364 protected void onDetachedFromWindow() { 14365 } 14366 14367 /** 14368 * This is a framework-internal mirror of onDetachedFromWindow() that's called 14369 * after onDetachedFromWindow(). 14370 * 14371 * If you override this you *MUST* call super.onDetachedFromWindowInternal()! 14372 * The super method should be called at the end of the overridden method to ensure 14373 * subclasses are destroyed first 14374 * 14375 * @hide 14376 */ 14377 @CallSuper 14378 protected void onDetachedFromWindowInternal() { 14379 mPrivateFlags &= ~PFLAG_CANCEL_NEXT_UP_EVENT; 14380 mPrivateFlags3 &= ~PFLAG3_IS_LAID_OUT; 14381 14382 removeUnsetPressCallback(); 14383 removeLongPressCallback(); 14384 removePerformClickCallback(); 14385 removeSendViewScrolledAccessibilityEventCallback(); 14386 stopNestedScroll(); 14387 14388 // Anything that started animating right before detach should already 14389 // be in its final state when re-attached. 14390 jumpDrawablesToCurrentState(); 14391 14392 destroyDrawingCache(); 14393 14394 cleanupDraw(); 14395 mCurrentAnimation = null; 14396 } 14397 14398 private void cleanupDraw() { 14399 resetDisplayList(); 14400 if (mAttachInfo != null) { 14401 mAttachInfo.mViewRootImpl.cancelInvalidate(this); 14402 } 14403 } 14404 14405 void invalidateInheritedLayoutMode(int layoutModeOfRoot) { 14406 } 14407 14408 /** 14409 * @return The number of times this view has been attached to a window 14410 */ 14411 protected int getWindowAttachCount() { 14412 return mWindowAttachCount; 14413 } 14414 14415 /** 14416 * Retrieve a unique token identifying the window this view is attached to. 14417 * @return Return the window's token for use in 14418 * {@link WindowManager.LayoutParams#token WindowManager.LayoutParams.token}. 14419 */ 14420 public IBinder getWindowToken() { 14421 return mAttachInfo != null ? mAttachInfo.mWindowToken : null; 14422 } 14423 14424 /** 14425 * Retrieve the {@link WindowId} for the window this view is 14426 * currently attached to. 14427 */ 14428 public WindowId getWindowId() { 14429 if (mAttachInfo == null) { 14430 return null; 14431 } 14432 if (mAttachInfo.mWindowId == null) { 14433 try { 14434 mAttachInfo.mIWindowId = mAttachInfo.mSession.getWindowId( 14435 mAttachInfo.mWindowToken); 14436 mAttachInfo.mWindowId = new WindowId( 14437 mAttachInfo.mIWindowId); 14438 } catch (RemoteException e) { 14439 } 14440 } 14441 return mAttachInfo.mWindowId; 14442 } 14443 14444 /** 14445 * Retrieve a unique token identifying the top-level "real" window of 14446 * the window that this view is attached to. That is, this is like 14447 * {@link #getWindowToken}, except if the window this view in is a panel 14448 * window (attached to another containing window), then the token of 14449 * the containing window is returned instead. 14450 * 14451 * @return Returns the associated window token, either 14452 * {@link #getWindowToken()} or the containing window's token. 14453 */ 14454 public IBinder getApplicationWindowToken() { 14455 AttachInfo ai = mAttachInfo; 14456 if (ai != null) { 14457 IBinder appWindowToken = ai.mPanelParentWindowToken; 14458 if (appWindowToken == null) { 14459 appWindowToken = ai.mWindowToken; 14460 } 14461 return appWindowToken; 14462 } 14463 return null; 14464 } 14465 14466 /** 14467 * Gets the logical display to which the view's window has been attached. 14468 * 14469 * @return The logical display, or null if the view is not currently attached to a window. 14470 */ 14471 public Display getDisplay() { 14472 return mAttachInfo != null ? mAttachInfo.mDisplay : null; 14473 } 14474 14475 /** 14476 * Retrieve private session object this view hierarchy is using to 14477 * communicate with the window manager. 14478 * @return the session object to communicate with the window manager 14479 */ 14480 /*package*/ IWindowSession getWindowSession() { 14481 return mAttachInfo != null ? mAttachInfo.mSession : null; 14482 } 14483 14484 /** 14485 * Return the visibility value of the least visible component passed. 14486 */ 14487 int combineVisibility(int vis1, int vis2) { 14488 // This works because VISIBLE < INVISIBLE < GONE. 14489 return Math.max(vis1, vis2); 14490 } 14491 14492 /** 14493 * @param info the {@link android.view.View.AttachInfo} to associated with 14494 * this view 14495 */ 14496 void dispatchAttachedToWindow(AttachInfo info, int visibility) { 14497 //System.out.println("Attached! " + this); 14498 mAttachInfo = info; 14499 if (mOverlay != null) { 14500 mOverlay.getOverlayView().dispatchAttachedToWindow(info, visibility); 14501 } 14502 mWindowAttachCount++; 14503 // We will need to evaluate the drawable state at least once. 14504 mPrivateFlags |= PFLAG_DRAWABLE_STATE_DIRTY; 14505 if (mFloatingTreeObserver != null) { 14506 info.mTreeObserver.merge(mFloatingTreeObserver); 14507 mFloatingTreeObserver = null; 14508 } 14509 if ((mPrivateFlags&PFLAG_SCROLL_CONTAINER) != 0) { 14510 mAttachInfo.mScrollContainers.add(this); 14511 mPrivateFlags |= PFLAG_SCROLL_CONTAINER_ADDED; 14512 } 14513 performCollectViewAttributes(mAttachInfo, visibility); 14514 onAttachedToWindow(); 14515 14516 ListenerInfo li = mListenerInfo; 14517 final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = 14518 li != null ? li.mOnAttachStateChangeListeners : null; 14519 if (listeners != null && listeners.size() > 0) { 14520 // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 14521 // perform the dispatching. The iterator is a safe guard against listeners that 14522 // could mutate the list by calling the various add/remove methods. This prevents 14523 // the array from being modified while we iterate it. 14524 for (OnAttachStateChangeListener listener : listeners) { 14525 listener.onViewAttachedToWindow(this); 14526 } 14527 } 14528 14529 int vis = info.mWindowVisibility; 14530 if (vis != GONE) { 14531 onWindowVisibilityChanged(vis); 14532 } 14533 14534 // Send onVisibilityChanged directly instead of dispatchVisibilityChanged. 14535 // As all views in the subtree will already receive dispatchAttachedToWindow 14536 // traversing the subtree again here is not desired. 14537 onVisibilityChanged(this, visibility); 14538 14539 if ((mPrivateFlags&PFLAG_DRAWABLE_STATE_DIRTY) != 0) { 14540 // If nobody has evaluated the drawable state yet, then do it now. 14541 refreshDrawableState(); 14542 } 14543 needGlobalAttributesUpdate(false); 14544 } 14545 14546 void dispatchDetachedFromWindow() { 14547 AttachInfo info = mAttachInfo; 14548 if (info != null) { 14549 int vis = info.mWindowVisibility; 14550 if (vis != GONE) { 14551 onWindowVisibilityChanged(GONE); 14552 } 14553 } 14554 14555 onDetachedFromWindow(); 14556 onDetachedFromWindowInternal(); 14557 14558 InputMethodManager imm = InputMethodManager.peekInstance(); 14559 if (imm != null) { 14560 imm.onViewDetachedFromWindow(this); 14561 } 14562 14563 ListenerInfo li = mListenerInfo; 14564 final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = 14565 li != null ? li.mOnAttachStateChangeListeners : null; 14566 if (listeners != null && listeners.size() > 0) { 14567 // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to 14568 // perform the dispatching. The iterator is a safe guard against listeners that 14569 // could mutate the list by calling the various add/remove methods. This prevents 14570 // the array from being modified while we iterate it. 14571 for (OnAttachStateChangeListener listener : listeners) { 14572 listener.onViewDetachedFromWindow(this); 14573 } 14574 } 14575 14576 if ((mPrivateFlags & PFLAG_SCROLL_CONTAINER_ADDED) != 0) { 14577 mAttachInfo.mScrollContainers.remove(this); 14578 mPrivateFlags &= ~PFLAG_SCROLL_CONTAINER_ADDED; 14579 } 14580 14581 mAttachInfo = null; 14582 if (mOverlay != null) { 14583 mOverlay.getOverlayView().dispatchDetachedFromWindow(); 14584 } 14585 } 14586 14587 /** 14588 * Cancel any deferred high-level input events that were previously posted to the event queue. 14589 * 14590 * <p>Many views post high-level events such as click handlers to the event queue 14591 * to run deferred in order to preserve a desired user experience - clearing visible 14592 * pressed states before executing, etc. This method will abort any events of this nature 14593 * that are currently in flight.</p> 14594 * 14595 * <p>Custom views that generate their own high-level deferred input events should override 14596 * {@link #onCancelPendingInputEvents()} and remove those pending events from the queue.</p> 14597 * 14598 * <p>This will also cancel pending input events for any child views.</p> 14599 * 14600 * <p>Note that this may not be sufficient as a debouncing strategy for clicks in all cases. 14601 * This will not impact newer events posted after this call that may occur as a result of 14602 * lower-level input events still waiting in the queue. If you are trying to prevent 14603 * double-submitted events for the duration of some sort of asynchronous transaction 14604 * you should also take other steps to protect against unexpected double inputs e.g. calling 14605 * {@link #setEnabled(boolean) setEnabled(false)} and re-enabling the view when 14606 * the transaction completes, tracking already submitted transaction IDs, etc.</p> 14607 */ 14608 public final void cancelPendingInputEvents() { 14609 dispatchCancelPendingInputEvents(); 14610 } 14611 14612 /** 14613 * Called by {@link #cancelPendingInputEvents()} to cancel input events in flight. 14614 * Overridden by ViewGroup to dispatch. Package scoped to prevent app-side meddling. 14615 */ 14616 void dispatchCancelPendingInputEvents() { 14617 mPrivateFlags3 &= ~PFLAG3_CALLED_SUPER; 14618 onCancelPendingInputEvents(); 14619 if ((mPrivateFlags3 & PFLAG3_CALLED_SUPER) != PFLAG3_CALLED_SUPER) { 14620 throw new SuperNotCalledException("View " + getClass().getSimpleName() + 14621 " did not call through to super.onCancelPendingInputEvents()"); 14622 } 14623 } 14624 14625 /** 14626 * Called as the result of a call to {@link #cancelPendingInputEvents()} on this view or 14627 * a parent view. 14628 * 14629 * <p>This method is responsible for removing any pending high-level input events that were 14630 * posted to the event queue to run later. Custom view classes that post their own deferred 14631 * high-level events via {@link #post(Runnable)}, {@link #postDelayed(Runnable, long)} or 14632 * {@link android.os.Handler} should override this method, call 14633 * <code>super.onCancelPendingInputEvents()</code> and remove those callbacks as appropriate. 14634 * </p> 14635 */ 14636 public void onCancelPendingInputEvents() { 14637 removePerformClickCallback(); 14638 cancelLongPress(); 14639 mPrivateFlags3 |= PFLAG3_CALLED_SUPER; 14640 } 14641 14642 /** 14643 * Store this view hierarchy's frozen state into the given container. 14644 * 14645 * @param container The SparseArray in which to save the view's state. 14646 * 14647 * @see #restoreHierarchyState(android.util.SparseArray) 14648 * @see #dispatchSaveInstanceState(android.util.SparseArray) 14649 * @see #onSaveInstanceState() 14650 */ 14651 public void saveHierarchyState(SparseArray<Parcelable> container) { 14652 dispatchSaveInstanceState(container); 14653 } 14654 14655 /** 14656 * Called by {@link #saveHierarchyState(android.util.SparseArray)} to store the state for 14657 * this view and its children. May be overridden to modify how freezing happens to a 14658 * view's children; for example, some views may want to not store state for their children. 14659 * 14660 * @param container The SparseArray in which to save the view's state. 14661 * 14662 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 14663 * @see #saveHierarchyState(android.util.SparseArray) 14664 * @see #onSaveInstanceState() 14665 */ 14666 protected void dispatchSaveInstanceState(SparseArray<Parcelable> container) { 14667 if (mID != NO_ID && (mViewFlags & SAVE_DISABLED_MASK) == 0) { 14668 mPrivateFlags &= ~PFLAG_SAVE_STATE_CALLED; 14669 Parcelable state = onSaveInstanceState(); 14670 if ((mPrivateFlags & PFLAG_SAVE_STATE_CALLED) == 0) { 14671 throw new IllegalStateException( 14672 "Derived class did not call super.onSaveInstanceState()"); 14673 } 14674 if (state != null) { 14675 // Log.i("View", "Freezing #" + Integer.toHexString(mID) 14676 // + ": " + state); 14677 container.put(mID, state); 14678 } 14679 } 14680 } 14681 14682 /** 14683 * Hook allowing a view to generate a representation of its internal state 14684 * that can later be used to create a new instance with that same state. 14685 * This state should only contain information that is not persistent or can 14686 * not be reconstructed later. For example, you will never store your 14687 * current position on screen because that will be computed again when a 14688 * new instance of the view is placed in its view hierarchy. 14689 * <p> 14690 * Some examples of things you may store here: the current cursor position 14691 * in a text view (but usually not the text itself since that is stored in a 14692 * content provider or other persistent storage), the currently selected 14693 * item in a list view. 14694 * 14695 * @return Returns a Parcelable object containing the view's current dynamic 14696 * state, or null if there is nothing interesting to save. The 14697 * default implementation returns null. 14698 * @see #onRestoreInstanceState(android.os.Parcelable) 14699 * @see #saveHierarchyState(android.util.SparseArray) 14700 * @see #dispatchSaveInstanceState(android.util.SparseArray) 14701 * @see #setSaveEnabled(boolean) 14702 */ 14703 @CallSuper 14704 protected Parcelable onSaveInstanceState() { 14705 mPrivateFlags |= PFLAG_SAVE_STATE_CALLED; 14706 if (mStartActivityRequestWho != null) { 14707 BaseSavedState state = new BaseSavedState(AbsSavedState.EMPTY_STATE); 14708 state.mStartActivityRequestWhoSaved = mStartActivityRequestWho; 14709 return state; 14710 } 14711 return BaseSavedState.EMPTY_STATE; 14712 } 14713 14714 /** 14715 * Restore this view hierarchy's frozen state from the given container. 14716 * 14717 * @param container The SparseArray which holds previously frozen states. 14718 * 14719 * @see #saveHierarchyState(android.util.SparseArray) 14720 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 14721 * @see #onRestoreInstanceState(android.os.Parcelable) 14722 */ 14723 public void restoreHierarchyState(SparseArray<Parcelable> container) { 14724 dispatchRestoreInstanceState(container); 14725 } 14726 14727 /** 14728 * Called by {@link #restoreHierarchyState(android.util.SparseArray)} to retrieve the 14729 * state for this view and its children. May be overridden to modify how restoring 14730 * happens to a view's children; for example, some views may want to not store state 14731 * for their children. 14732 * 14733 * @param container The SparseArray which holds previously saved state. 14734 * 14735 * @see #dispatchSaveInstanceState(android.util.SparseArray) 14736 * @see #restoreHierarchyState(android.util.SparseArray) 14737 * @see #onRestoreInstanceState(android.os.Parcelable) 14738 */ 14739 protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) { 14740 if (mID != NO_ID) { 14741 Parcelable state = container.get(mID); 14742 if (state != null) { 14743 // Log.i("View", "Restoreing #" + Integer.toHexString(mID) 14744 // + ": " + state); 14745 mPrivateFlags &= ~PFLAG_SAVE_STATE_CALLED; 14746 onRestoreInstanceState(state); 14747 if ((mPrivateFlags & PFLAG_SAVE_STATE_CALLED) == 0) { 14748 throw new IllegalStateException( 14749 "Derived class did not call super.onRestoreInstanceState()"); 14750 } 14751 } 14752 } 14753 } 14754 14755 /** 14756 * Hook allowing a view to re-apply a representation of its internal state that had previously 14757 * been generated by {@link #onSaveInstanceState}. This function will never be called with a 14758 * null state. 14759 * 14760 * @param state The frozen state that had previously been returned by 14761 * {@link #onSaveInstanceState}. 14762 * 14763 * @see #onSaveInstanceState() 14764 * @see #restoreHierarchyState(android.util.SparseArray) 14765 * @see #dispatchRestoreInstanceState(android.util.SparseArray) 14766 */ 14767 @CallSuper 14768 protected void onRestoreInstanceState(Parcelable state) { 14769 mPrivateFlags |= PFLAG_SAVE_STATE_CALLED; 14770 if (state != null && !(state instanceof AbsSavedState)) { 14771 throw new IllegalArgumentException("Wrong state class, expecting View State but " 14772 + "received " + state.getClass().toString() + " instead. This usually happens " 14773 + "when two views of different type have the same id in the same hierarchy. " 14774 + "This view's id is " + ViewDebug.resolveId(mContext, getId()) + ". Make sure " 14775 + "other views do not use the same id."); 14776 } 14777 if (state != null && state instanceof BaseSavedState) { 14778 mStartActivityRequestWho = ((BaseSavedState) state).mStartActivityRequestWhoSaved; 14779 } 14780 } 14781 14782 /** 14783 * <p>Return the time at which the drawing of the view hierarchy started.</p> 14784 * 14785 * @return the drawing start time in milliseconds 14786 */ 14787 public long getDrawingTime() { 14788 return mAttachInfo != null ? mAttachInfo.mDrawingTime : 0; 14789 } 14790 14791 /** 14792 * <p>Enables or disables the duplication of the parent's state into this view. When 14793 * duplication is enabled, this view gets its drawable state from its parent rather 14794 * than from its own internal properties.</p> 14795 * 14796 * <p>Note: in the current implementation, setting this property to true after the 14797 * view was added to a ViewGroup might have no effect at all. This property should 14798 * always be used from XML or set to true before adding this view to a ViewGroup.</p> 14799 * 14800 * <p>Note: if this view's parent addStateFromChildren property is enabled and this 14801 * property is enabled, an exception will be thrown.</p> 14802 * 14803 * <p>Note: if the child view uses and updates additional states which are unknown to the 14804 * parent, these states should not be affected by this method.</p> 14805 * 14806 * @param enabled True to enable duplication of the parent's drawable state, false 14807 * to disable it. 14808 * 14809 * @see #getDrawableState() 14810 * @see #isDuplicateParentStateEnabled() 14811 */ 14812 public void setDuplicateParentStateEnabled(boolean enabled) { 14813 setFlags(enabled ? DUPLICATE_PARENT_STATE : 0, DUPLICATE_PARENT_STATE); 14814 } 14815 14816 /** 14817 * <p>Indicates whether this duplicates its drawable state from its parent.</p> 14818 * 14819 * @return True if this view's drawable state is duplicated from the parent, 14820 * false otherwise 14821 * 14822 * @see #getDrawableState() 14823 * @see #setDuplicateParentStateEnabled(boolean) 14824 */ 14825 public boolean isDuplicateParentStateEnabled() { 14826 return (mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE; 14827 } 14828 14829 /** 14830 * <p>Specifies the type of layer backing this view. The layer can be 14831 * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 14832 * {@link #LAYER_TYPE_HARDWARE}.</p> 14833 * 14834 * <p>A layer is associated with an optional {@link android.graphics.Paint} 14835 * instance that controls how the layer is composed on screen. The following 14836 * properties of the paint are taken into account when composing the layer:</p> 14837 * <ul> 14838 * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> 14839 * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> 14840 * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> 14841 * </ul> 14842 * 14843 * <p>If this view has an alpha value set to < 1.0 by calling 14844 * {@link #setAlpha(float)}, the alpha value of the layer's paint is superseded 14845 * by this view's alpha value.</p> 14846 * 14847 * <p>Refer to the documentation of {@link #LAYER_TYPE_NONE}, 14848 * {@link #LAYER_TYPE_SOFTWARE} and {@link #LAYER_TYPE_HARDWARE} 14849 * for more information on when and how to use layers.</p> 14850 * 14851 * @param layerType The type of layer to use with this view, must be one of 14852 * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 14853 * {@link #LAYER_TYPE_HARDWARE} 14854 * @param paint The paint used to compose the layer. This argument is optional 14855 * and can be null. It is ignored when the layer type is 14856 * {@link #LAYER_TYPE_NONE} 14857 * 14858 * @see #getLayerType() 14859 * @see #LAYER_TYPE_NONE 14860 * @see #LAYER_TYPE_SOFTWARE 14861 * @see #LAYER_TYPE_HARDWARE 14862 * @see #setAlpha(float) 14863 * 14864 * @attr ref android.R.styleable#View_layerType 14865 */ 14866 public void setLayerType(int layerType, Paint paint) { 14867 if (layerType < LAYER_TYPE_NONE || layerType > LAYER_TYPE_HARDWARE) { 14868 throw new IllegalArgumentException("Layer type can only be one of: LAYER_TYPE_NONE, " 14869 + "LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE"); 14870 } 14871 14872 boolean typeChanged = mRenderNode.setLayerType(layerType); 14873 14874 if (!typeChanged) { 14875 setLayerPaint(paint); 14876 return; 14877 } 14878 14879 // Destroy any previous software drawing cache if needed 14880 if (mLayerType == LAYER_TYPE_SOFTWARE) { 14881 destroyDrawingCache(); 14882 } 14883 14884 mLayerType = layerType; 14885 final boolean layerDisabled = (mLayerType == LAYER_TYPE_NONE); 14886 mLayerPaint = layerDisabled ? null : (paint == null ? new Paint() : paint); 14887 mRenderNode.setLayerPaint(mLayerPaint); 14888 14889 // draw() behaves differently if we are on a layer, so we need to 14890 // invalidate() here 14891 invalidateParentCaches(); 14892 invalidate(true); 14893 } 14894 14895 /** 14896 * Updates the {@link Paint} object used with the current layer (used only if the current 14897 * layer type is not set to {@link #LAYER_TYPE_NONE}). Changed properties of the Paint 14898 * provided to {@link #setLayerType(int, android.graphics.Paint)} will be used the next time 14899 * the View is redrawn, but {@link #setLayerPaint(android.graphics.Paint)} must be called to 14900 * ensure that the view gets redrawn immediately. 14901 * 14902 * <p>A layer is associated with an optional {@link android.graphics.Paint} 14903 * instance that controls how the layer is composed on screen. The following 14904 * properties of the paint are taken into account when composing the layer:</p> 14905 * <ul> 14906 * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> 14907 * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> 14908 * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> 14909 * </ul> 14910 * 14911 * <p>If this view has an alpha value set to < 1.0 by calling {@link #setAlpha(float)}, the 14912 * alpha value of the layer's paint is superseded by this view's alpha value.</p> 14913 * 14914 * @param paint The paint used to compose the layer. This argument is optional 14915 * and can be null. It is ignored when the layer type is 14916 * {@link #LAYER_TYPE_NONE} 14917 * 14918 * @see #setLayerType(int, android.graphics.Paint) 14919 */ 14920 public void setLayerPaint(Paint paint) { 14921 int layerType = getLayerType(); 14922 if (layerType != LAYER_TYPE_NONE) { 14923 mLayerPaint = paint == null ? new Paint() : paint; 14924 if (layerType == LAYER_TYPE_HARDWARE) { 14925 if (mRenderNode.setLayerPaint(mLayerPaint)) { 14926 invalidateViewProperty(false, false); 14927 } 14928 } else { 14929 invalidate(); 14930 } 14931 } 14932 } 14933 14934 /** 14935 * Indicates what type of layer is currently associated with this view. By default 14936 * a view does not have a layer, and the layer type is {@link #LAYER_TYPE_NONE}. 14937 * Refer to the documentation of {@link #setLayerType(int, android.graphics.Paint)} 14938 * for more information on the different types of layers. 14939 * 14940 * @return {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or 14941 * {@link #LAYER_TYPE_HARDWARE} 14942 * 14943 * @see #setLayerType(int, android.graphics.Paint) 14944 * @see #buildLayer() 14945 * @see #LAYER_TYPE_NONE 14946 * @see #LAYER_TYPE_SOFTWARE 14947 * @see #LAYER_TYPE_HARDWARE 14948 */ 14949 public int getLayerType() { 14950 return mLayerType; 14951 } 14952 14953 /** 14954 * Forces this view's layer to be created and this view to be rendered 14955 * into its layer. If this view's layer type is set to {@link #LAYER_TYPE_NONE}, 14956 * invoking this method will have no effect. 14957 * 14958 * This method can for instance be used to render a view into its layer before 14959 * starting an animation. If this view is complex, rendering into the layer 14960 * before starting the animation will avoid skipping frames. 14961 * 14962 * @throws IllegalStateException If this view is not attached to a window 14963 * 14964 * @see #setLayerType(int, android.graphics.Paint) 14965 */ 14966 public void buildLayer() { 14967 if (mLayerType == LAYER_TYPE_NONE) return; 14968 14969 final AttachInfo attachInfo = mAttachInfo; 14970 if (attachInfo == null) { 14971 throw new IllegalStateException("This view must be attached to a window first"); 14972 } 14973 14974 if (getWidth() == 0 || getHeight() == 0) { 14975 return; 14976 } 14977 14978 switch (mLayerType) { 14979 case LAYER_TYPE_HARDWARE: 14980 updateDisplayListIfDirty(); 14981 if (attachInfo.mHardwareRenderer != null && mRenderNode.isValid()) { 14982 attachInfo.mHardwareRenderer.buildLayer(mRenderNode); 14983 } 14984 break; 14985 case LAYER_TYPE_SOFTWARE: 14986 buildDrawingCache(true); 14987 break; 14988 } 14989 } 14990 14991 /** 14992 * If this View draws with a HardwareLayer, returns it. 14993 * Otherwise returns null 14994 * 14995 * TODO: Only TextureView uses this, can we eliminate it? 14996 */ 14997 HardwareLayer getHardwareLayer() { 14998 return null; 14999 } 15000 15001 /** 15002 * Destroys all hardware rendering resources. This method is invoked 15003 * when the system needs to reclaim resources. Upon execution of this 15004 * method, you should free any OpenGL resources created by the view. 15005 * 15006 * Note: you <strong>must</strong> call 15007 * <code>super.destroyHardwareResources()</code> when overriding 15008 * this method. 15009 * 15010 * @hide 15011 */ 15012 @CallSuper 15013 protected void destroyHardwareResources() { 15014 // Although the Layer will be destroyed by RenderNode, we want to release 15015 // the staging display list, which is also a signal to RenderNode that it's 15016 // safe to free its copy of the display list as it knows that we will 15017 // push an updated DisplayList if we try to draw again 15018 resetDisplayList(); 15019 } 15020 15021 /** 15022 * <p>Enables or disables the drawing cache. When the drawing cache is enabled, the next call 15023 * to {@link #getDrawingCache()} or {@link #buildDrawingCache()} will draw the view in a 15024 * bitmap. Calling {@link #draw(android.graphics.Canvas)} will not draw from the cache when 15025 * the cache is enabled. To benefit from the cache, you must request the drawing cache by 15026 * calling {@link #getDrawingCache()} and draw it on screen if the returned bitmap is not 15027 * null.</p> 15028 * 15029 * <p>Enabling the drawing cache is similar to 15030 * {@link #setLayerType(int, android.graphics.Paint) setting a layer} when hardware 15031 * acceleration is turned off. When hardware acceleration is turned on, enabling the 15032 * drawing cache has no effect on rendering because the system uses a different mechanism 15033 * for acceleration which ignores the flag. If you want to use a Bitmap for the view, even 15034 * when hardware acceleration is enabled, see {@link #setLayerType(int, android.graphics.Paint)} 15035 * for information on how to enable software and hardware layers.</p> 15036 * 15037 * <p>This API can be used to manually generate 15038 * a bitmap copy of this view, by setting the flag to <code>true</code> and calling 15039 * {@link #getDrawingCache()}.</p> 15040 * 15041 * @param enabled true to enable the drawing cache, false otherwise 15042 * 15043 * @see #isDrawingCacheEnabled() 15044 * @see #getDrawingCache() 15045 * @see #buildDrawingCache() 15046 * @see #setLayerType(int, android.graphics.Paint) 15047 */ 15048 public void setDrawingCacheEnabled(boolean enabled) { 15049 mCachingFailed = false; 15050 setFlags(enabled ? DRAWING_CACHE_ENABLED : 0, DRAWING_CACHE_ENABLED); 15051 } 15052 15053 /** 15054 * <p>Indicates whether the drawing cache is enabled for this view.</p> 15055 * 15056 * @return true if the drawing cache is enabled 15057 * 15058 * @see #setDrawingCacheEnabled(boolean) 15059 * @see #getDrawingCache() 15060 */ 15061 @ViewDebug.ExportedProperty(category = "drawing") 15062 public boolean isDrawingCacheEnabled() { 15063 return (mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED; 15064 } 15065 15066 /** 15067 * Debugging utility which recursively outputs the dirty state of a view and its 15068 * descendants. 15069 * 15070 * @hide 15071 */ 15072 @SuppressWarnings({"UnusedDeclaration"}) 15073 public void outputDirtyFlags(String indent, boolean clear, int clearMask) { 15074 Log.d("View", indent + this + " DIRTY(" + (mPrivateFlags & View.PFLAG_DIRTY_MASK) + 15075 ") DRAWN(" + (mPrivateFlags & PFLAG_DRAWN) + ")" + " CACHE_VALID(" + 15076 (mPrivateFlags & View.PFLAG_DRAWING_CACHE_VALID) + 15077 ") INVALIDATED(" + (mPrivateFlags & PFLAG_INVALIDATED) + ")"); 15078 if (clear) { 15079 mPrivateFlags &= clearMask; 15080 } 15081 if (this instanceof ViewGroup) { 15082 ViewGroup parent = (ViewGroup) this; 15083 final int count = parent.getChildCount(); 15084 for (int i = 0; i < count; i++) { 15085 final View child = parent.getChildAt(i); 15086 child.outputDirtyFlags(indent + " ", clear, clearMask); 15087 } 15088 } 15089 } 15090 15091 /** 15092 * This method is used by ViewGroup to cause its children to restore or recreate their 15093 * display lists. It is called by getDisplayList() when the parent ViewGroup does not need 15094 * to recreate its own display list, which would happen if it went through the normal 15095 * draw/dispatchDraw mechanisms. 15096 * 15097 * @hide 15098 */ 15099 protected void dispatchGetDisplayList() {} 15100 15101 /** 15102 * A view that is not attached or hardware accelerated cannot create a display list. 15103 * This method checks these conditions and returns the appropriate result. 15104 * 15105 * @return true if view has the ability to create a display list, false otherwise. 15106 * 15107 * @hide 15108 */ 15109 public boolean canHaveDisplayList() { 15110 return !(mAttachInfo == null || mAttachInfo.mHardwareRenderer == null); 15111 } 15112 15113 /** 15114 * Gets the RenderNode for the view, and updates its DisplayList (if needed and supported) 15115 * @hide 15116 */ 15117 @NonNull 15118 public RenderNode updateDisplayListIfDirty() { 15119 final RenderNode renderNode = mRenderNode; 15120 if (!canHaveDisplayList()) { 15121 // can't populate RenderNode, don't try 15122 return renderNode; 15123 } 15124 15125 if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 15126 || !renderNode.isValid() 15127 || (mRecreateDisplayList)) { 15128 // Don't need to recreate the display list, just need to tell our 15129 // children to restore/recreate theirs 15130 if (renderNode.isValid() 15131 && !mRecreateDisplayList) { 15132 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 15133 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 15134 dispatchGetDisplayList(); 15135 15136 return renderNode; // no work needed 15137 } 15138 15139 // If we got here, we're recreating it. Mark it as such to ensure that 15140 // we copy in child display lists into ours in drawChild() 15141 mRecreateDisplayList = true; 15142 15143 int width = mRight - mLeft; 15144 int height = mBottom - mTop; 15145 int layerType = getLayerType(); 15146 15147 final DisplayListCanvas canvas = renderNode.start(width, height); 15148 canvas.setHighContrastText(mAttachInfo.mHighContrastText); 15149 15150 try { 15151 final HardwareLayer layer = getHardwareLayer(); 15152 if (layer != null && layer.isValid()) { 15153 canvas.drawHardwareLayer(layer, 0, 0, mLayerPaint); 15154 } else if (layerType == LAYER_TYPE_SOFTWARE) { 15155 buildDrawingCache(true); 15156 Bitmap cache = getDrawingCache(true); 15157 if (cache != null) { 15158 canvas.drawBitmap(cache, 0, 0, mLayerPaint); 15159 } 15160 } else { 15161 computeScroll(); 15162 15163 canvas.translate(-mScrollX, -mScrollY); 15164 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 15165 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 15166 15167 // Fast path for layouts with no backgrounds 15168 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 15169 dispatchDraw(canvas); 15170 if (mOverlay != null && !mOverlay.isEmpty()) { 15171 mOverlay.getOverlayView().draw(canvas); 15172 } 15173 } else { 15174 draw(canvas); 15175 } 15176 } 15177 } finally { 15178 renderNode.end(canvas); 15179 setDisplayListProperties(renderNode); 15180 } 15181 } else { 15182 mPrivateFlags |= PFLAG_DRAWN | PFLAG_DRAWING_CACHE_VALID; 15183 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 15184 } 15185 return renderNode; 15186 } 15187 15188 private void resetDisplayList() { 15189 if (mRenderNode.isValid()) { 15190 mRenderNode.destroyDisplayListData(); 15191 } 15192 15193 if (mBackgroundRenderNode != null && mBackgroundRenderNode.isValid()) { 15194 mBackgroundRenderNode.destroyDisplayListData(); 15195 } 15196 } 15197 15198 /** 15199 * <p>Calling this method is equivalent to calling <code>getDrawingCache(false)</code>.</p> 15200 * 15201 * @return A non-scaled bitmap representing this view or null if cache is disabled. 15202 * 15203 * @see #getDrawingCache(boolean) 15204 */ 15205 public Bitmap getDrawingCache() { 15206 return getDrawingCache(false); 15207 } 15208 15209 /** 15210 * <p>Returns the bitmap in which this view drawing is cached. The returned bitmap 15211 * is null when caching is disabled. If caching is enabled and the cache is not ready, 15212 * this method will create it. Calling {@link #draw(android.graphics.Canvas)} will not 15213 * draw from the cache when the cache is enabled. To benefit from the cache, you must 15214 * request the drawing cache by calling this method and draw it on screen if the 15215 * returned bitmap is not null.</p> 15216 * 15217 * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, 15218 * this method will create a bitmap of the same size as this view. Because this bitmap 15219 * will be drawn scaled by the parent ViewGroup, the result on screen might show 15220 * scaling artifacts. To avoid such artifacts, you should call this method by setting 15221 * the auto scaling to true. Doing so, however, will generate a bitmap of a different 15222 * size than the view. This implies that your application must be able to handle this 15223 * size.</p> 15224 * 15225 * @param autoScale Indicates whether the generated bitmap should be scaled based on 15226 * the current density of the screen when the application is in compatibility 15227 * mode. 15228 * 15229 * @return A bitmap representing this view or null if cache is disabled. 15230 * 15231 * @see #setDrawingCacheEnabled(boolean) 15232 * @see #isDrawingCacheEnabled() 15233 * @see #buildDrawingCache(boolean) 15234 * @see #destroyDrawingCache() 15235 */ 15236 public Bitmap getDrawingCache(boolean autoScale) { 15237 if ((mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING) { 15238 return null; 15239 } 15240 if ((mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED) { 15241 buildDrawingCache(autoScale); 15242 } 15243 return autoScale ? mDrawingCache : mUnscaledDrawingCache; 15244 } 15245 15246 /** 15247 * <p>Frees the resources used by the drawing cache. If you call 15248 * {@link #buildDrawingCache()} manually without calling 15249 * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you 15250 * should cleanup the cache with this method afterwards.</p> 15251 * 15252 * @see #setDrawingCacheEnabled(boolean) 15253 * @see #buildDrawingCache() 15254 * @see #getDrawingCache() 15255 */ 15256 public void destroyDrawingCache() { 15257 if (mDrawingCache != null) { 15258 mDrawingCache.recycle(); 15259 mDrawingCache = null; 15260 } 15261 if (mUnscaledDrawingCache != null) { 15262 mUnscaledDrawingCache.recycle(); 15263 mUnscaledDrawingCache = null; 15264 } 15265 } 15266 15267 /** 15268 * Setting a solid background color for the drawing cache's bitmaps will improve 15269 * performance and memory usage. Note, though that this should only be used if this 15270 * view will always be drawn on top of a solid color. 15271 * 15272 * @param color The background color to use for the drawing cache's bitmap 15273 * 15274 * @see #setDrawingCacheEnabled(boolean) 15275 * @see #buildDrawingCache() 15276 * @see #getDrawingCache() 15277 */ 15278 public void setDrawingCacheBackgroundColor(@ColorInt int color) { 15279 if (color != mDrawingCacheBackgroundColor) { 15280 mDrawingCacheBackgroundColor = color; 15281 mPrivateFlags &= ~PFLAG_DRAWING_CACHE_VALID; 15282 } 15283 } 15284 15285 /** 15286 * @see #setDrawingCacheBackgroundColor(int) 15287 * 15288 * @return The background color to used for the drawing cache's bitmap 15289 */ 15290 @ColorInt 15291 public int getDrawingCacheBackgroundColor() { 15292 return mDrawingCacheBackgroundColor; 15293 } 15294 15295 /** 15296 * <p>Calling this method is equivalent to calling <code>buildDrawingCache(false)</code>.</p> 15297 * 15298 * @see #buildDrawingCache(boolean) 15299 */ 15300 public void buildDrawingCache() { 15301 buildDrawingCache(false); 15302 } 15303 15304 /** 15305 * <p>Forces the drawing cache to be built if the drawing cache is invalid.</p> 15306 * 15307 * <p>If you call {@link #buildDrawingCache()} manually without calling 15308 * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you 15309 * should cleanup the cache by calling {@link #destroyDrawingCache()} afterwards.</p> 15310 * 15311 * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, 15312 * this method will create a bitmap of the same size as this view. Because this bitmap 15313 * will be drawn scaled by the parent ViewGroup, the result on screen might show 15314 * scaling artifacts. To avoid such artifacts, you should call this method by setting 15315 * the auto scaling to true. Doing so, however, will generate a bitmap of a different 15316 * size than the view. This implies that your application must be able to handle this 15317 * size.</p> 15318 * 15319 * <p>You should avoid calling this method when hardware acceleration is enabled. If 15320 * you do not need the drawing cache bitmap, calling this method will increase memory 15321 * usage and cause the view to be rendered in software once, thus negatively impacting 15322 * performance.</p> 15323 * 15324 * @see #getDrawingCache() 15325 * @see #destroyDrawingCache() 15326 */ 15327 public void buildDrawingCache(boolean autoScale) { 15328 if ((mPrivateFlags & PFLAG_DRAWING_CACHE_VALID) == 0 || (autoScale ? 15329 mDrawingCache == null : mUnscaledDrawingCache == null)) { 15330 if (Trace.isTagEnabled(Trace.TRACE_TAG_VIEW)) { 15331 Trace.traceBegin(Trace.TRACE_TAG_VIEW, 15332 "buildDrawingCache/SW Layer for " + getClass().getSimpleName()); 15333 } 15334 try { 15335 buildDrawingCacheImpl(autoScale); 15336 } finally { 15337 Trace.traceEnd(Trace.TRACE_TAG_VIEW); 15338 } 15339 } 15340 } 15341 15342 /** 15343 * private, internal implementation of buildDrawingCache, used to enable tracing 15344 */ 15345 private void buildDrawingCacheImpl(boolean autoScale) { 15346 mCachingFailed = false; 15347 15348 int width = mRight - mLeft; 15349 int height = mBottom - mTop; 15350 15351 final AttachInfo attachInfo = mAttachInfo; 15352 final boolean scalingRequired = attachInfo != null && attachInfo.mScalingRequired; 15353 15354 if (autoScale && scalingRequired) { 15355 width = (int) ((width * attachInfo.mApplicationScale) + 0.5f); 15356 height = (int) ((height * attachInfo.mApplicationScale) + 0.5f); 15357 } 15358 15359 final int drawingCacheBackgroundColor = mDrawingCacheBackgroundColor; 15360 final boolean opaque = drawingCacheBackgroundColor != 0 || isOpaque(); 15361 final boolean use32BitCache = attachInfo != null && attachInfo.mUse32BitDrawingCache; 15362 15363 final long projectedBitmapSize = width * height * (opaque && !use32BitCache ? 2 : 4); 15364 final long drawingCacheSize = 15365 ViewConfiguration.get(mContext).getScaledMaximumDrawingCacheSize(); 15366 if (width <= 0 || height <= 0 || projectedBitmapSize > drawingCacheSize) { 15367 if (width > 0 && height > 0) { 15368 Log.w(VIEW_LOG_TAG, getClass().getSimpleName() + " not displayed because it is" 15369 + " too large to fit into a software layer (or drawing cache), needs " 15370 + projectedBitmapSize + " bytes, only " 15371 + drawingCacheSize + " available"); 15372 } 15373 destroyDrawingCache(); 15374 mCachingFailed = true; 15375 return; 15376 } 15377 15378 boolean clear = true; 15379 Bitmap bitmap = autoScale ? mDrawingCache : mUnscaledDrawingCache; 15380 15381 if (bitmap == null || bitmap.getWidth() != width || bitmap.getHeight() != height) { 15382 Bitmap.Config quality; 15383 if (!opaque) { 15384 // Never pick ARGB_4444 because it looks awful 15385 // Keep the DRAWING_CACHE_QUALITY_LOW flag just in case 15386 switch (mViewFlags & DRAWING_CACHE_QUALITY_MASK) { 15387 case DRAWING_CACHE_QUALITY_AUTO: 15388 case DRAWING_CACHE_QUALITY_LOW: 15389 case DRAWING_CACHE_QUALITY_HIGH: 15390 default: 15391 quality = Bitmap.Config.ARGB_8888; 15392 break; 15393 } 15394 } else { 15395 // Optimization for translucent windows 15396 // If the window is translucent, use a 32 bits bitmap to benefit from memcpy() 15397 quality = use32BitCache ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565; 15398 } 15399 15400 // Try to cleanup memory 15401 if (bitmap != null) bitmap.recycle(); 15402 15403 try { 15404 bitmap = Bitmap.createBitmap(mResources.getDisplayMetrics(), 15405 width, height, quality); 15406 bitmap.setDensity(getResources().getDisplayMetrics().densityDpi); 15407 if (autoScale) { 15408 mDrawingCache = bitmap; 15409 } else { 15410 mUnscaledDrawingCache = bitmap; 15411 } 15412 if (opaque && use32BitCache) bitmap.setHasAlpha(false); 15413 } catch (OutOfMemoryError e) { 15414 // If there is not enough memory to create the bitmap cache, just 15415 // ignore the issue as bitmap caches are not required to draw the 15416 // view hierarchy 15417 if (autoScale) { 15418 mDrawingCache = null; 15419 } else { 15420 mUnscaledDrawingCache = null; 15421 } 15422 mCachingFailed = true; 15423 return; 15424 } 15425 15426 clear = drawingCacheBackgroundColor != 0; 15427 } 15428 15429 Canvas canvas; 15430 if (attachInfo != null) { 15431 canvas = attachInfo.mCanvas; 15432 if (canvas == null) { 15433 canvas = new Canvas(); 15434 } 15435 canvas.setBitmap(bitmap); 15436 // Temporarily clobber the cached Canvas in case one of our children 15437 // is also using a drawing cache. Without this, the children would 15438 // steal the canvas by attaching their own bitmap to it and bad, bad 15439 // thing would happen (invisible views, corrupted drawings, etc.) 15440 attachInfo.mCanvas = null; 15441 } else { 15442 // This case should hopefully never or seldom happen 15443 canvas = new Canvas(bitmap); 15444 } 15445 15446 if (clear) { 15447 bitmap.eraseColor(drawingCacheBackgroundColor); 15448 } 15449 15450 computeScroll(); 15451 final int restoreCount = canvas.save(); 15452 15453 if (autoScale && scalingRequired) { 15454 final float scale = attachInfo.mApplicationScale; 15455 canvas.scale(scale, scale); 15456 } 15457 15458 canvas.translate(-mScrollX, -mScrollY); 15459 15460 mPrivateFlags |= PFLAG_DRAWN; 15461 if (mAttachInfo == null || !mAttachInfo.mHardwareAccelerated || 15462 mLayerType != LAYER_TYPE_NONE) { 15463 mPrivateFlags |= PFLAG_DRAWING_CACHE_VALID; 15464 } 15465 15466 // Fast path for layouts with no backgrounds 15467 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 15468 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 15469 dispatchDraw(canvas); 15470 if (mOverlay != null && !mOverlay.isEmpty()) { 15471 mOverlay.getOverlayView().draw(canvas); 15472 } 15473 } else { 15474 draw(canvas); 15475 } 15476 15477 canvas.restoreToCount(restoreCount); 15478 canvas.setBitmap(null); 15479 15480 if (attachInfo != null) { 15481 // Restore the cached Canvas for our siblings 15482 attachInfo.mCanvas = canvas; 15483 } 15484 } 15485 15486 /** 15487 * Create a snapshot of the view into a bitmap. We should probably make 15488 * some form of this public, but should think about the API. 15489 */ 15490 Bitmap createSnapshot(Bitmap.Config quality, int backgroundColor, boolean skipChildren) { 15491 int width = mRight - mLeft; 15492 int height = mBottom - mTop; 15493 15494 final AttachInfo attachInfo = mAttachInfo; 15495 final float scale = attachInfo != null ? attachInfo.mApplicationScale : 1.0f; 15496 width = (int) ((width * scale) + 0.5f); 15497 height = (int) ((height * scale) + 0.5f); 15498 15499 Bitmap bitmap = Bitmap.createBitmap(mResources.getDisplayMetrics(), 15500 width > 0 ? width : 1, height > 0 ? height : 1, quality); 15501 if (bitmap == null) { 15502 throw new OutOfMemoryError(); 15503 } 15504 15505 Resources resources = getResources(); 15506 if (resources != null) { 15507 bitmap.setDensity(resources.getDisplayMetrics().densityDpi); 15508 } 15509 15510 Canvas canvas; 15511 if (attachInfo != null) { 15512 canvas = attachInfo.mCanvas; 15513 if (canvas == null) { 15514 canvas = new Canvas(); 15515 } 15516 canvas.setBitmap(bitmap); 15517 // Temporarily clobber the cached Canvas in case one of our children 15518 // is also using a drawing cache. Without this, the children would 15519 // steal the canvas by attaching their own bitmap to it and bad, bad 15520 // things would happen (invisible views, corrupted drawings, etc.) 15521 attachInfo.mCanvas = null; 15522 } else { 15523 // This case should hopefully never or seldom happen 15524 canvas = new Canvas(bitmap); 15525 } 15526 15527 if ((backgroundColor & 0xff000000) != 0) { 15528 bitmap.eraseColor(backgroundColor); 15529 } 15530 15531 computeScroll(); 15532 final int restoreCount = canvas.save(); 15533 canvas.scale(scale, scale); 15534 canvas.translate(-mScrollX, -mScrollY); 15535 15536 // Temporarily remove the dirty mask 15537 int flags = mPrivateFlags; 15538 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 15539 15540 // Fast path for layouts with no backgrounds 15541 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 15542 dispatchDraw(canvas); 15543 if (mOverlay != null && !mOverlay.isEmpty()) { 15544 mOverlay.getOverlayView().draw(canvas); 15545 } 15546 } else { 15547 draw(canvas); 15548 } 15549 15550 mPrivateFlags = flags; 15551 15552 canvas.restoreToCount(restoreCount); 15553 canvas.setBitmap(null); 15554 15555 if (attachInfo != null) { 15556 // Restore the cached Canvas for our siblings 15557 attachInfo.mCanvas = canvas; 15558 } 15559 15560 return bitmap; 15561 } 15562 15563 /** 15564 * Indicates whether this View is currently in edit mode. A View is usually 15565 * in edit mode when displayed within a developer tool. For instance, if 15566 * this View is being drawn by a visual user interface builder, this method 15567 * should return true. 15568 * 15569 * Subclasses should check the return value of this method to provide 15570 * different behaviors if their normal behavior might interfere with the 15571 * host environment. For instance: the class spawns a thread in its 15572 * constructor, the drawing code relies on device-specific features, etc. 15573 * 15574 * This method is usually checked in the drawing code of custom widgets. 15575 * 15576 * @return True if this View is in edit mode, false otherwise. 15577 */ 15578 public boolean isInEditMode() { 15579 return false; 15580 } 15581 15582 /** 15583 * If the View draws content inside its padding and enables fading edges, 15584 * it needs to support padding offsets. Padding offsets are added to the 15585 * fading edges to extend the length of the fade so that it covers pixels 15586 * drawn inside the padding. 15587 * 15588 * Subclasses of this class should override this method if they need 15589 * to draw content inside the padding. 15590 * 15591 * @return True if padding offset must be applied, false otherwise. 15592 * 15593 * @see #getLeftPaddingOffset() 15594 * @see #getRightPaddingOffset() 15595 * @see #getTopPaddingOffset() 15596 * @see #getBottomPaddingOffset() 15597 * 15598 * @since CURRENT 15599 */ 15600 protected boolean isPaddingOffsetRequired() { 15601 return false; 15602 } 15603 15604 /** 15605 * Amount by which to extend the left fading region. Called only when 15606 * {@link #isPaddingOffsetRequired()} returns true. 15607 * 15608 * @return The left padding offset in pixels. 15609 * 15610 * @see #isPaddingOffsetRequired() 15611 * 15612 * @since CURRENT 15613 */ 15614 protected int getLeftPaddingOffset() { 15615 return 0; 15616 } 15617 15618 /** 15619 * Amount by which to extend the right fading region. Called only when 15620 * {@link #isPaddingOffsetRequired()} returns true. 15621 * 15622 * @return The right padding offset in pixels. 15623 * 15624 * @see #isPaddingOffsetRequired() 15625 * 15626 * @since CURRENT 15627 */ 15628 protected int getRightPaddingOffset() { 15629 return 0; 15630 } 15631 15632 /** 15633 * Amount by which to extend the top fading region. Called only when 15634 * {@link #isPaddingOffsetRequired()} returns true. 15635 * 15636 * @return The top padding offset in pixels. 15637 * 15638 * @see #isPaddingOffsetRequired() 15639 * 15640 * @since CURRENT 15641 */ 15642 protected int getTopPaddingOffset() { 15643 return 0; 15644 } 15645 15646 /** 15647 * Amount by which to extend the bottom fading region. Called only when 15648 * {@link #isPaddingOffsetRequired()} returns true. 15649 * 15650 * @return The bottom padding offset in pixels. 15651 * 15652 * @see #isPaddingOffsetRequired() 15653 * 15654 * @since CURRENT 15655 */ 15656 protected int getBottomPaddingOffset() { 15657 return 0; 15658 } 15659 15660 /** 15661 * @hide 15662 * @param offsetRequired 15663 */ 15664 protected int getFadeTop(boolean offsetRequired) { 15665 int top = mPaddingTop; 15666 if (offsetRequired) top += getTopPaddingOffset(); 15667 return top; 15668 } 15669 15670 /** 15671 * @hide 15672 * @param offsetRequired 15673 */ 15674 protected int getFadeHeight(boolean offsetRequired) { 15675 int padding = mPaddingTop; 15676 if (offsetRequired) padding += getTopPaddingOffset(); 15677 return mBottom - mTop - mPaddingBottom - padding; 15678 } 15679 15680 /** 15681 * <p>Indicates whether this view is attached to a hardware accelerated 15682 * window or not.</p> 15683 * 15684 * <p>Even if this method returns true, it does not mean that every call 15685 * to {@link #draw(android.graphics.Canvas)} will be made with an hardware 15686 * accelerated {@link android.graphics.Canvas}. For instance, if this view 15687 * is drawn onto an offscreen {@link android.graphics.Bitmap} and its 15688 * window is hardware accelerated, 15689 * {@link android.graphics.Canvas#isHardwareAccelerated()} will likely 15690 * return false, and this method will return true.</p> 15691 * 15692 * @return True if the view is attached to a window and the window is 15693 * hardware accelerated; false in any other case. 15694 */ 15695 @ViewDebug.ExportedProperty(category = "drawing") 15696 public boolean isHardwareAccelerated() { 15697 return mAttachInfo != null && mAttachInfo.mHardwareAccelerated; 15698 } 15699 15700 /** 15701 * Sets a rectangular area on this view to which the view will be clipped 15702 * when it is drawn. Setting the value to null will remove the clip bounds 15703 * and the view will draw normally, using its full bounds. 15704 * 15705 * @param clipBounds The rectangular area, in the local coordinates of 15706 * this view, to which future drawing operations will be clipped. 15707 */ 15708 public void setClipBounds(Rect clipBounds) { 15709 if (clipBounds == mClipBounds 15710 || (clipBounds != null && clipBounds.equals(mClipBounds))) { 15711 return; 15712 } 15713 if (clipBounds != null) { 15714 if (mClipBounds == null) { 15715 mClipBounds = new Rect(clipBounds); 15716 } else { 15717 mClipBounds.set(clipBounds); 15718 } 15719 } else { 15720 mClipBounds = null; 15721 } 15722 mRenderNode.setClipBounds(mClipBounds); 15723 invalidateViewProperty(false, false); 15724 } 15725 15726 /** 15727 * Returns a copy of the current {@link #setClipBounds(Rect) clipBounds}. 15728 * 15729 * @return A copy of the current clip bounds if clip bounds are set, 15730 * otherwise null. 15731 */ 15732 public Rect getClipBounds() { 15733 return (mClipBounds != null) ? new Rect(mClipBounds) : null; 15734 } 15735 15736 15737 /** 15738 * Populates an output rectangle with the clip bounds of the view, 15739 * returning {@code true} if successful or {@code false} if the view's 15740 * clip bounds are {@code null}. 15741 * 15742 * @param outRect rectangle in which to place the clip bounds of the view 15743 * @return {@code true} if successful or {@code false} if the view's 15744 * clip bounds are {@code null} 15745 */ 15746 public boolean getClipBounds(Rect outRect) { 15747 if (mClipBounds != null) { 15748 outRect.set(mClipBounds); 15749 return true; 15750 } 15751 return false; 15752 } 15753 15754 /** 15755 * Utility function, called by draw(canvas, parent, drawingTime) to handle the less common 15756 * case of an active Animation being run on the view. 15757 */ 15758 private boolean applyLegacyAnimation(ViewGroup parent, long drawingTime, 15759 Animation a, boolean scalingRequired) { 15760 Transformation invalidationTransform; 15761 final int flags = parent.mGroupFlags; 15762 final boolean initialized = a.isInitialized(); 15763 if (!initialized) { 15764 a.initialize(mRight - mLeft, mBottom - mTop, parent.getWidth(), parent.getHeight()); 15765 a.initializeInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop); 15766 if (mAttachInfo != null) a.setListenerHandler(mAttachInfo.mHandler); 15767 onAnimationStart(); 15768 } 15769 15770 final Transformation t = parent.getChildTransformation(); 15771 boolean more = a.getTransformation(drawingTime, t, 1f); 15772 if (scalingRequired && mAttachInfo.mApplicationScale != 1f) { 15773 if (parent.mInvalidationTransformation == null) { 15774 parent.mInvalidationTransformation = new Transformation(); 15775 } 15776 invalidationTransform = parent.mInvalidationTransformation; 15777 a.getTransformation(drawingTime, invalidationTransform, 1f); 15778 } else { 15779 invalidationTransform = t; 15780 } 15781 15782 if (more) { 15783 if (!a.willChangeBounds()) { 15784 if ((flags & (ViewGroup.FLAG_OPTIMIZE_INVALIDATE | ViewGroup.FLAG_ANIMATION_DONE)) == 15785 ViewGroup.FLAG_OPTIMIZE_INVALIDATE) { 15786 parent.mGroupFlags |= ViewGroup.FLAG_INVALIDATE_REQUIRED; 15787 } else if ((flags & ViewGroup.FLAG_INVALIDATE_REQUIRED) == 0) { 15788 // The child need to draw an animation, potentially offscreen, so 15789 // make sure we do not cancel invalidate requests 15790 parent.mPrivateFlags |= PFLAG_DRAW_ANIMATION; 15791 parent.invalidate(mLeft, mTop, mRight, mBottom); 15792 } 15793 } else { 15794 if (parent.mInvalidateRegion == null) { 15795 parent.mInvalidateRegion = new RectF(); 15796 } 15797 final RectF region = parent.mInvalidateRegion; 15798 a.getInvalidateRegion(0, 0, mRight - mLeft, mBottom - mTop, region, 15799 invalidationTransform); 15800 15801 // The child need to draw an animation, potentially offscreen, so 15802 // make sure we do not cancel invalidate requests 15803 parent.mPrivateFlags |= PFLAG_DRAW_ANIMATION; 15804 15805 final int left = mLeft + (int) region.left; 15806 final int top = mTop + (int) region.top; 15807 parent.invalidate(left, top, left + (int) (region.width() + .5f), 15808 top + (int) (region.height() + .5f)); 15809 } 15810 } 15811 return more; 15812 } 15813 15814 /** 15815 * This method is called by getDisplayList() when a display list is recorded for a View. 15816 * It pushes any properties to the RenderNode that aren't managed by the RenderNode. 15817 */ 15818 void setDisplayListProperties(RenderNode renderNode) { 15819 if (renderNode != null) { 15820 renderNode.setHasOverlappingRendering(hasOverlappingRendering()); 15821 renderNode.setClipToBounds(mParent instanceof ViewGroup 15822 && ((ViewGroup) mParent).getClipChildren()); 15823 15824 float alpha = 1; 15825 if (mParent instanceof ViewGroup && (((ViewGroup) mParent).mGroupFlags & 15826 ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) { 15827 ViewGroup parentVG = (ViewGroup) mParent; 15828 final Transformation t = parentVG.getChildTransformation(); 15829 if (parentVG.getChildStaticTransformation(this, t)) { 15830 final int transformType = t.getTransformationType(); 15831 if (transformType != Transformation.TYPE_IDENTITY) { 15832 if ((transformType & Transformation.TYPE_ALPHA) != 0) { 15833 alpha = t.getAlpha(); 15834 } 15835 if ((transformType & Transformation.TYPE_MATRIX) != 0) { 15836 renderNode.setStaticMatrix(t.getMatrix()); 15837 } 15838 } 15839 } 15840 } 15841 if (mTransformationInfo != null) { 15842 alpha *= getFinalAlpha(); 15843 if (alpha < 1) { 15844 final int multipliedAlpha = (int) (255 * alpha); 15845 if (onSetAlpha(multipliedAlpha)) { 15846 alpha = 1; 15847 } 15848 } 15849 renderNode.setAlpha(alpha); 15850 } else if (alpha < 1) { 15851 renderNode.setAlpha(alpha); 15852 } 15853 } 15854 } 15855 15856 /** 15857 * This method is called by ViewGroup.drawChild() to have each child view draw itself. 15858 * 15859 * This is where the View specializes rendering behavior based on layer type, 15860 * and hardware acceleration. 15861 */ 15862 boolean draw(Canvas canvas, ViewGroup parent, long drawingTime) { 15863 final boolean hardwareAcceleratedCanvas = canvas.isHardwareAccelerated(); 15864 /* If an attached view draws to a HW canvas, it may use its RenderNode + DisplayList. 15865 * 15866 * If a view is dettached, its DisplayList shouldn't exist. If the canvas isn't 15867 * HW accelerated, it can't handle drawing RenderNodes. 15868 */ 15869 boolean drawingWithRenderNode = mAttachInfo != null 15870 && mAttachInfo.mHardwareAccelerated 15871 && hardwareAcceleratedCanvas; 15872 15873 boolean more = false; 15874 final boolean childHasIdentityMatrix = hasIdentityMatrix(); 15875 final int parentFlags = parent.mGroupFlags; 15876 15877 if ((parentFlags & ViewGroup.FLAG_CLEAR_TRANSFORMATION) != 0) { 15878 parent.getChildTransformation().clear(); 15879 parent.mGroupFlags &= ~ViewGroup.FLAG_CLEAR_TRANSFORMATION; 15880 } 15881 15882 Transformation transformToApply = null; 15883 boolean concatMatrix = false; 15884 final boolean scalingRequired = mAttachInfo != null && mAttachInfo.mScalingRequired; 15885 final Animation a = getAnimation(); 15886 if (a != null) { 15887 more = applyLegacyAnimation(parent, drawingTime, a, scalingRequired); 15888 concatMatrix = a.willChangeTransformationMatrix(); 15889 if (concatMatrix) { 15890 mPrivateFlags3 |= PFLAG3_VIEW_IS_ANIMATING_TRANSFORM; 15891 } 15892 transformToApply = parent.getChildTransformation(); 15893 } else { 15894 if ((mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_TRANSFORM) != 0) { 15895 // No longer animating: clear out old animation matrix 15896 mRenderNode.setAnimationMatrix(null); 15897 mPrivateFlags3 &= ~PFLAG3_VIEW_IS_ANIMATING_TRANSFORM; 15898 } 15899 if (!drawingWithRenderNode 15900 && (parentFlags & ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS) != 0) { 15901 final Transformation t = parent.getChildTransformation(); 15902 final boolean hasTransform = parent.getChildStaticTransformation(this, t); 15903 if (hasTransform) { 15904 final int transformType = t.getTransformationType(); 15905 transformToApply = transformType != Transformation.TYPE_IDENTITY ? t : null; 15906 concatMatrix = (transformType & Transformation.TYPE_MATRIX) != 0; 15907 } 15908 } 15909 } 15910 15911 concatMatrix |= !childHasIdentityMatrix; 15912 15913 // Sets the flag as early as possible to allow draw() implementations 15914 // to call invalidate() successfully when doing animations 15915 mPrivateFlags |= PFLAG_DRAWN; 15916 15917 if (!concatMatrix && 15918 (parentFlags & (ViewGroup.FLAG_SUPPORT_STATIC_TRANSFORMATIONS | 15919 ViewGroup.FLAG_CLIP_CHILDREN)) == ViewGroup.FLAG_CLIP_CHILDREN && 15920 canvas.quickReject(mLeft, mTop, mRight, mBottom, Canvas.EdgeType.BW) && 15921 (mPrivateFlags & PFLAG_DRAW_ANIMATION) == 0) { 15922 mPrivateFlags2 |= PFLAG2_VIEW_QUICK_REJECTED; 15923 return more; 15924 } 15925 mPrivateFlags2 &= ~PFLAG2_VIEW_QUICK_REJECTED; 15926 15927 if (hardwareAcceleratedCanvas) { 15928 // Clear INVALIDATED flag to allow invalidation to occur during rendering, but 15929 // retain the flag's value temporarily in the mRecreateDisplayList flag 15930 mRecreateDisplayList = (mPrivateFlags & PFLAG_INVALIDATED) != 0; 15931 mPrivateFlags &= ~PFLAG_INVALIDATED; 15932 } 15933 15934 RenderNode renderNode = null; 15935 Bitmap cache = null; 15936 int layerType = getLayerType(); // TODO: signify cache state with just 'cache' local 15937 if (layerType == LAYER_TYPE_SOFTWARE 15938 || (!drawingWithRenderNode && layerType != LAYER_TYPE_NONE)) { 15939 // If not drawing with RenderNode, treat HW layers as SW 15940 layerType = LAYER_TYPE_SOFTWARE; 15941 buildDrawingCache(true); 15942 cache = getDrawingCache(true); 15943 } 15944 15945 if (drawingWithRenderNode) { 15946 // Delay getting the display list until animation-driven alpha values are 15947 // set up and possibly passed on to the view 15948 renderNode = updateDisplayListIfDirty(); 15949 if (!renderNode.isValid()) { 15950 // Uncommon, but possible. If a view is removed from the hierarchy during the call 15951 // to getDisplayList(), the display list will be marked invalid and we should not 15952 // try to use it again. 15953 renderNode = null; 15954 drawingWithRenderNode = false; 15955 } 15956 } 15957 15958 int sx = 0; 15959 int sy = 0; 15960 if (!drawingWithRenderNode) { 15961 computeScroll(); 15962 sx = mScrollX; 15963 sy = mScrollY; 15964 } 15965 15966 final boolean drawingWithDrawingCache = cache != null && !drawingWithRenderNode; 15967 final boolean offsetForScroll = cache == null && !drawingWithRenderNode; 15968 15969 int restoreTo = -1; 15970 if (!drawingWithRenderNode || transformToApply != null) { 15971 restoreTo = canvas.save(); 15972 } 15973 if (offsetForScroll) { 15974 canvas.translate(mLeft - sx, mTop - sy); 15975 } else { 15976 if (!drawingWithRenderNode) { 15977 canvas.translate(mLeft, mTop); 15978 } 15979 if (scalingRequired) { 15980 if (drawingWithRenderNode) { 15981 // TODO: Might not need this if we put everything inside the DL 15982 restoreTo = canvas.save(); 15983 } 15984 // mAttachInfo cannot be null, otherwise scalingRequired == false 15985 final float scale = 1.0f / mAttachInfo.mApplicationScale; 15986 canvas.scale(scale, scale); 15987 } 15988 } 15989 15990 float alpha = drawingWithRenderNode ? 1 : (getAlpha() * getTransitionAlpha()); 15991 if (transformToApply != null 15992 || alpha < 1 15993 || !hasIdentityMatrix() 15994 || (mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_ALPHA) != 0) { 15995 if (transformToApply != null || !childHasIdentityMatrix) { 15996 int transX = 0; 15997 int transY = 0; 15998 15999 if (offsetForScroll) { 16000 transX = -sx; 16001 transY = -sy; 16002 } 16003 16004 if (transformToApply != null) { 16005 if (concatMatrix) { 16006 if (drawingWithRenderNode) { 16007 renderNode.setAnimationMatrix(transformToApply.getMatrix()); 16008 } else { 16009 // Undo the scroll translation, apply the transformation matrix, 16010 // then redo the scroll translate to get the correct result. 16011 canvas.translate(-transX, -transY); 16012 canvas.concat(transformToApply.getMatrix()); 16013 canvas.translate(transX, transY); 16014 } 16015 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 16016 } 16017 16018 float transformAlpha = transformToApply.getAlpha(); 16019 if (transformAlpha < 1) { 16020 alpha *= transformAlpha; 16021 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 16022 } 16023 } 16024 16025 if (!childHasIdentityMatrix && !drawingWithRenderNode) { 16026 canvas.translate(-transX, -transY); 16027 canvas.concat(getMatrix()); 16028 canvas.translate(transX, transY); 16029 } 16030 } 16031 16032 // Deal with alpha if it is or used to be <1 16033 if (alpha < 1 || (mPrivateFlags3 & PFLAG3_VIEW_IS_ANIMATING_ALPHA) != 0) { 16034 if (alpha < 1) { 16035 mPrivateFlags3 |= PFLAG3_VIEW_IS_ANIMATING_ALPHA; 16036 } else { 16037 mPrivateFlags3 &= ~PFLAG3_VIEW_IS_ANIMATING_ALPHA; 16038 } 16039 parent.mGroupFlags |= ViewGroup.FLAG_CLEAR_TRANSFORMATION; 16040 if (!drawingWithDrawingCache) { 16041 final int multipliedAlpha = (int) (255 * alpha); 16042 if (!onSetAlpha(multipliedAlpha)) { 16043 if (drawingWithRenderNode) { 16044 renderNode.setAlpha(alpha * getAlpha() * getTransitionAlpha()); 16045 } else if (layerType == LAYER_TYPE_NONE) { 16046 canvas.saveLayerAlpha(sx, sy, sx + getWidth(), sy + getHeight(), 16047 multipliedAlpha); 16048 } 16049 } else { 16050 // Alpha is handled by the child directly, clobber the layer's alpha 16051 mPrivateFlags |= PFLAG_ALPHA_SET; 16052 } 16053 } 16054 } 16055 } else if ((mPrivateFlags & PFLAG_ALPHA_SET) == PFLAG_ALPHA_SET) { 16056 onSetAlpha(255); 16057 mPrivateFlags &= ~PFLAG_ALPHA_SET; 16058 } 16059 16060 if (!drawingWithRenderNode) { 16061 // apply clips directly, since RenderNode won't do it for this draw 16062 if ((parentFlags & ViewGroup.FLAG_CLIP_CHILDREN) != 0 && cache == null) { 16063 if (offsetForScroll) { 16064 canvas.clipRect(sx, sy, sx + getWidth(), sy + getHeight()); 16065 } else { 16066 if (!scalingRequired || cache == null) { 16067 canvas.clipRect(0, 0, getWidth(), getHeight()); 16068 } else { 16069 canvas.clipRect(0, 0, cache.getWidth(), cache.getHeight()); 16070 } 16071 } 16072 } 16073 16074 if (mClipBounds != null) { 16075 // clip bounds ignore scroll 16076 canvas.clipRect(mClipBounds); 16077 } 16078 } 16079 16080 if (!drawingWithDrawingCache) { 16081 if (drawingWithRenderNode) { 16082 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 16083 ((DisplayListCanvas) canvas).drawRenderNode(renderNode); 16084 } else { 16085 // Fast path for layouts with no backgrounds 16086 if ((mPrivateFlags & PFLAG_SKIP_DRAW) == PFLAG_SKIP_DRAW) { 16087 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 16088 dispatchDraw(canvas); 16089 } else { 16090 draw(canvas); 16091 } 16092 } 16093 } else if (cache != null) { 16094 mPrivateFlags &= ~PFLAG_DIRTY_MASK; 16095 if (layerType == LAYER_TYPE_NONE) { 16096 // no layer paint, use temporary paint to draw bitmap 16097 Paint cachePaint = parent.mCachePaint; 16098 if (cachePaint == null) { 16099 cachePaint = new Paint(); 16100 cachePaint.setDither(false); 16101 parent.mCachePaint = cachePaint; 16102 } 16103 cachePaint.setAlpha((int) (alpha * 255)); 16104 canvas.drawBitmap(cache, 0.0f, 0.0f, cachePaint); 16105 } else { 16106 // use layer paint to draw the bitmap, merging the two alphas, but also restore 16107 int layerPaintAlpha = mLayerPaint.getAlpha(); 16108 mLayerPaint.setAlpha((int) (alpha * layerPaintAlpha)); 16109 canvas.drawBitmap(cache, 0.0f, 0.0f, mLayerPaint); 16110 mLayerPaint.setAlpha(layerPaintAlpha); 16111 } 16112 } 16113 16114 if (restoreTo >= 0) { 16115 canvas.restoreToCount(restoreTo); 16116 } 16117 16118 if (a != null && !more) { 16119 if (!hardwareAcceleratedCanvas && !a.getFillAfter()) { 16120 onSetAlpha(255); 16121 } 16122 parent.finishAnimatingView(this, a); 16123 } 16124 16125 if (more && hardwareAcceleratedCanvas) { 16126 if (a.hasAlpha() && (mPrivateFlags & PFLAG_ALPHA_SET) == PFLAG_ALPHA_SET) { 16127 // alpha animations should cause the child to recreate its display list 16128 invalidate(true); 16129 } 16130 } 16131 16132 mRecreateDisplayList = false; 16133 16134 return more; 16135 } 16136 16137 /** 16138 * Manually render this view (and all of its children) to the given Canvas. 16139 * The view must have already done a full layout before this function is 16140 * called. When implementing a view, implement 16141 * {@link #onDraw(android.graphics.Canvas)} instead of overriding this method. 16142 * If you do need to override this method, call the superclass version. 16143 * 16144 * @param canvas The Canvas to which the View is rendered. 16145 */ 16146 @CallSuper 16147 public void draw(Canvas canvas) { 16148 final int privateFlags = mPrivateFlags; 16149 final boolean dirtyOpaque = (privateFlags & PFLAG_DIRTY_MASK) == PFLAG_DIRTY_OPAQUE && 16150 (mAttachInfo == null || !mAttachInfo.mIgnoreDirtyState); 16151 mPrivateFlags = (privateFlags & ~PFLAG_DIRTY_MASK) | PFLAG_DRAWN; 16152 16153 /* 16154 * Draw traversal performs several drawing steps which must be executed 16155 * in the appropriate order: 16156 * 16157 * 1. Draw the background 16158 * 2. If necessary, save the canvas' layers to prepare for fading 16159 * 3. Draw view's content 16160 * 4. Draw children 16161 * 5. If necessary, draw the fading edges and restore layers 16162 * 6. Draw decorations (scrollbars for instance) 16163 */ 16164 16165 // Step 1, draw the background, if needed 16166 int saveCount; 16167 16168 if (!dirtyOpaque) { 16169 drawBackground(canvas); 16170 } 16171 16172 // skip step 2 & 5 if possible (common case) 16173 final int viewFlags = mViewFlags; 16174 boolean horizontalEdges = (viewFlags & FADING_EDGE_HORIZONTAL) != 0; 16175 boolean verticalEdges = (viewFlags & FADING_EDGE_VERTICAL) != 0; 16176 if (!verticalEdges && !horizontalEdges) { 16177 // Step 3, draw the content 16178 if (!dirtyOpaque) onDraw(canvas); 16179 16180 // Step 4, draw the children 16181 dispatchDraw(canvas); 16182 16183 // Overlay is part of the content and draws beneath Foreground 16184 if (mOverlay != null && !mOverlay.isEmpty()) { 16185 mOverlay.getOverlayView().dispatchDraw(canvas); 16186 } 16187 16188 // Step 6, draw decorations (foreground, scrollbars) 16189 onDrawForeground(canvas); 16190 16191 // we're done... 16192 return; 16193 } 16194 16195 /* 16196 * Here we do the full fledged routine... 16197 * (this is an uncommon case where speed matters less, 16198 * this is why we repeat some of the tests that have been 16199 * done above) 16200 */ 16201 16202 boolean drawTop = false; 16203 boolean drawBottom = false; 16204 boolean drawLeft = false; 16205 boolean drawRight = false; 16206 16207 float topFadeStrength = 0.0f; 16208 float bottomFadeStrength = 0.0f; 16209 float leftFadeStrength = 0.0f; 16210 float rightFadeStrength = 0.0f; 16211 16212 // Step 2, save the canvas' layers 16213 int paddingLeft = mPaddingLeft; 16214 16215 final boolean offsetRequired = isPaddingOffsetRequired(); 16216 if (offsetRequired) { 16217 paddingLeft += getLeftPaddingOffset(); 16218 } 16219 16220 int left = mScrollX + paddingLeft; 16221 int right = left + mRight - mLeft - mPaddingRight - paddingLeft; 16222 int top = mScrollY + getFadeTop(offsetRequired); 16223 int bottom = top + getFadeHeight(offsetRequired); 16224 16225 if (offsetRequired) { 16226 right += getRightPaddingOffset(); 16227 bottom += getBottomPaddingOffset(); 16228 } 16229 16230 final ScrollabilityCache scrollabilityCache = mScrollCache; 16231 final float fadeHeight = scrollabilityCache.fadingEdgeLength; 16232 int length = (int) fadeHeight; 16233 16234 // clip the fade length if top and bottom fades overlap 16235 // overlapping fades produce odd-looking artifacts 16236 if (verticalEdges && (top + length > bottom - length)) { 16237 length = (bottom - top) / 2; 16238 } 16239 16240 // also clip horizontal fades if necessary 16241 if (horizontalEdges && (left + length > right - length)) { 16242 length = (right - left) / 2; 16243 } 16244 16245 if (verticalEdges) { 16246 topFadeStrength = Math.max(0.0f, Math.min(1.0f, getTopFadingEdgeStrength())); 16247 drawTop = topFadeStrength * fadeHeight > 1.0f; 16248 bottomFadeStrength = Math.max(0.0f, Math.min(1.0f, getBottomFadingEdgeStrength())); 16249 drawBottom = bottomFadeStrength * fadeHeight > 1.0f; 16250 } 16251 16252 if (horizontalEdges) { 16253 leftFadeStrength = Math.max(0.0f, Math.min(1.0f, getLeftFadingEdgeStrength())); 16254 drawLeft = leftFadeStrength * fadeHeight > 1.0f; 16255 rightFadeStrength = Math.max(0.0f, Math.min(1.0f, getRightFadingEdgeStrength())); 16256 drawRight = rightFadeStrength * fadeHeight > 1.0f; 16257 } 16258 16259 saveCount = canvas.getSaveCount(); 16260 16261 int solidColor = getSolidColor(); 16262 if (solidColor == 0) { 16263 final int flags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; 16264 16265 if (drawTop) { 16266 canvas.saveLayer(left, top, right, top + length, null, flags); 16267 } 16268 16269 if (drawBottom) { 16270 canvas.saveLayer(left, bottom - length, right, bottom, null, flags); 16271 } 16272 16273 if (drawLeft) { 16274 canvas.saveLayer(left, top, left + length, bottom, null, flags); 16275 } 16276 16277 if (drawRight) { 16278 canvas.saveLayer(right - length, top, right, bottom, null, flags); 16279 } 16280 } else { 16281 scrollabilityCache.setFadeColor(solidColor); 16282 } 16283 16284 // Step 3, draw the content 16285 if (!dirtyOpaque) onDraw(canvas); 16286 16287 // Step 4, draw the children 16288 dispatchDraw(canvas); 16289 16290 // Step 5, draw the fade effect and restore layers 16291 final Paint p = scrollabilityCache.paint; 16292 final Matrix matrix = scrollabilityCache.matrix; 16293 final Shader fade = scrollabilityCache.shader; 16294 16295 if (drawTop) { 16296 matrix.setScale(1, fadeHeight * topFadeStrength); 16297 matrix.postTranslate(left, top); 16298 fade.setLocalMatrix(matrix); 16299 p.setShader(fade); 16300 canvas.drawRect(left, top, right, top + length, p); 16301 } 16302 16303 if (drawBottom) { 16304 matrix.setScale(1, fadeHeight * bottomFadeStrength); 16305 matrix.postRotate(180); 16306 matrix.postTranslate(left, bottom); 16307 fade.setLocalMatrix(matrix); 16308 p.setShader(fade); 16309 canvas.drawRect(left, bottom - length, right, bottom, p); 16310 } 16311 16312 if (drawLeft) { 16313 matrix.setScale(1, fadeHeight * leftFadeStrength); 16314 matrix.postRotate(-90); 16315 matrix.postTranslate(left, top); 16316 fade.setLocalMatrix(matrix); 16317 p.setShader(fade); 16318 canvas.drawRect(left, top, left + length, bottom, p); 16319 } 16320 16321 if (drawRight) { 16322 matrix.setScale(1, fadeHeight * rightFadeStrength); 16323 matrix.postRotate(90); 16324 matrix.postTranslate(right, top); 16325 fade.setLocalMatrix(matrix); 16326 p.setShader(fade); 16327 canvas.drawRect(right - length, top, right, bottom, p); 16328 } 16329 16330 canvas.restoreToCount(saveCount); 16331 16332 // Overlay is part of the content and draws beneath Foreground 16333 if (mOverlay != null && !mOverlay.isEmpty()) { 16334 mOverlay.getOverlayView().dispatchDraw(canvas); 16335 } 16336 16337 // Step 6, draw decorations (foreground, scrollbars) 16338 onDrawForeground(canvas); 16339 } 16340 16341 /** 16342 * Draws the background onto the specified canvas. 16343 * 16344 * @param canvas Canvas on which to draw the background 16345 */ 16346 private void drawBackground(Canvas canvas) { 16347 final Drawable background = mBackground; 16348 if (background == null) { 16349 return; 16350 } 16351 16352 setBackgroundBounds(); 16353 16354 // Attempt to use a display list if requested. 16355 if (canvas.isHardwareAccelerated() && mAttachInfo != null 16356 && mAttachInfo.mHardwareRenderer != null) { 16357 mBackgroundRenderNode = getDrawableRenderNode(background, mBackgroundRenderNode); 16358 16359 final RenderNode renderNode = mBackgroundRenderNode; 16360 if (renderNode != null && renderNode.isValid()) { 16361 setBackgroundRenderNodeProperties(renderNode); 16362 ((DisplayListCanvas) canvas).drawRenderNode(renderNode); 16363 return; 16364 } 16365 } 16366 16367 final int scrollX = mScrollX; 16368 final int scrollY = mScrollY; 16369 if ((scrollX | scrollY) == 0) { 16370 background.draw(canvas); 16371 } else { 16372 canvas.translate(scrollX, scrollY); 16373 background.draw(canvas); 16374 canvas.translate(-scrollX, -scrollY); 16375 } 16376 } 16377 16378 /** 16379 * Sets the correct background bounds and rebuilds the outline, if needed. 16380 * <p/> 16381 * This is called by LayoutLib. 16382 */ 16383 void setBackgroundBounds() { 16384 if (mBackgroundSizeChanged && mBackground != null) { 16385 mBackground.setBounds(0, 0, mRight - mLeft, mBottom - mTop); 16386 mBackgroundSizeChanged = false; 16387 rebuildOutline(); 16388 } 16389 } 16390 16391 private void setBackgroundRenderNodeProperties(RenderNode renderNode) { 16392 renderNode.setTranslationX(mScrollX); 16393 renderNode.setTranslationY(mScrollY); 16394 } 16395 16396 /** 16397 * Creates a new display list or updates the existing display list for the 16398 * specified Drawable. 16399 * 16400 * @param drawable Drawable for which to create a display list 16401 * @param renderNode Existing RenderNode, or {@code null} 16402 * @return A valid display list for the specified drawable 16403 */ 16404 private RenderNode getDrawableRenderNode(Drawable drawable, RenderNode renderNode) { 16405 if (renderNode == null) { 16406 renderNode = RenderNode.create(drawable.getClass().getName(), this); 16407 } 16408 16409 final Rect bounds = drawable.getBounds(); 16410 final int width = bounds.width(); 16411 final int height = bounds.height(); 16412 final DisplayListCanvas canvas = renderNode.start(width, height); 16413 16414 // Reverse left/top translation done by drawable canvas, which will 16415 // instead be applied by rendernode's LTRB bounds below. This way, the 16416 // drawable's bounds match with its rendernode bounds and its content 16417 // will lie within those bounds in the rendernode tree. 16418 canvas.translate(-bounds.left, -bounds.top); 16419 16420 try { 16421 drawable.draw(canvas); 16422 } finally { 16423 renderNode.end(canvas); 16424 } 16425 16426 // Set up drawable properties that are view-independent. 16427 renderNode.setLeftTopRightBottom(bounds.left, bounds.top, bounds.right, bounds.bottom); 16428 renderNode.setProjectBackwards(drawable.isProjected()); 16429 renderNode.setProjectionReceiver(true); 16430 renderNode.setClipToBounds(false); 16431 return renderNode; 16432 } 16433 16434 /** 16435 * Returns the overlay for this view, creating it if it does not yet exist. 16436 * Adding drawables to the overlay will cause them to be displayed whenever 16437 * the view itself is redrawn. Objects in the overlay should be actively 16438 * managed: remove them when they should not be displayed anymore. The 16439 * overlay will always have the same size as its host view. 16440 * 16441 * <p>Note: Overlays do not currently work correctly with {@link 16442 * SurfaceView} or {@link TextureView}; contents in overlays for these 16443 * types of views may not display correctly.</p> 16444 * 16445 * @return The ViewOverlay object for this view. 16446 * @see ViewOverlay 16447 */ 16448 public ViewOverlay getOverlay() { 16449 if (mOverlay == null) { 16450 mOverlay = new ViewOverlay(mContext, this); 16451 } 16452 return mOverlay; 16453 } 16454 16455 /** 16456 * Override this if your view is known to always be drawn on top of a solid color background, 16457 * and needs to draw fading edges. Returning a non-zero color enables the view system to 16458 * optimize the drawing of the fading edges. If you do return a non-zero color, the alpha 16459 * should be set to 0xFF. 16460 * 16461 * @see #setVerticalFadingEdgeEnabled(boolean) 16462 * @see #setHorizontalFadingEdgeEnabled(boolean) 16463 * 16464 * @return The known solid color background for this view, or 0 if the color may vary 16465 */ 16466 @ViewDebug.ExportedProperty(category = "drawing") 16467 @ColorInt 16468 public int getSolidColor() { 16469 return 0; 16470 } 16471 16472 /** 16473 * Build a human readable string representation of the specified view flags. 16474 * 16475 * @param flags the view flags to convert to a string 16476 * @return a String representing the supplied flags 16477 */ 16478 private static String printFlags(int flags) { 16479 String output = ""; 16480 int numFlags = 0; 16481 if ((flags & FOCUSABLE_MASK) == FOCUSABLE) { 16482 output += "TAKES_FOCUS"; 16483 numFlags++; 16484 } 16485 16486 switch (flags & VISIBILITY_MASK) { 16487 case INVISIBLE: 16488 if (numFlags > 0) { 16489 output += " "; 16490 } 16491 output += "INVISIBLE"; 16492 // USELESS HERE numFlags++; 16493 break; 16494 case GONE: 16495 if (numFlags > 0) { 16496 output += " "; 16497 } 16498 output += "GONE"; 16499 // USELESS HERE numFlags++; 16500 break; 16501 default: 16502 break; 16503 } 16504 return output; 16505 } 16506 16507 /** 16508 * Build a human readable string representation of the specified private 16509 * view flags. 16510 * 16511 * @param privateFlags the private view flags to convert to a string 16512 * @return a String representing the supplied flags 16513 */ 16514 private static String printPrivateFlags(int privateFlags) { 16515 String output = ""; 16516 int numFlags = 0; 16517 16518 if ((privateFlags & PFLAG_WANTS_FOCUS) == PFLAG_WANTS_FOCUS) { 16519 output += "WANTS_FOCUS"; 16520 numFlags++; 16521 } 16522 16523 if ((privateFlags & PFLAG_FOCUSED) == PFLAG_FOCUSED) { 16524 if (numFlags > 0) { 16525 output += " "; 16526 } 16527 output += "FOCUSED"; 16528 numFlags++; 16529 } 16530 16531 if ((privateFlags & PFLAG_SELECTED) == PFLAG_SELECTED) { 16532 if (numFlags > 0) { 16533 output += " "; 16534 } 16535 output += "SELECTED"; 16536 numFlags++; 16537 } 16538 16539 if ((privateFlags & PFLAG_IS_ROOT_NAMESPACE) == PFLAG_IS_ROOT_NAMESPACE) { 16540 if (numFlags > 0) { 16541 output += " "; 16542 } 16543 output += "IS_ROOT_NAMESPACE"; 16544 numFlags++; 16545 } 16546 16547 if ((privateFlags & PFLAG_HAS_BOUNDS) == PFLAG_HAS_BOUNDS) { 16548 if (numFlags > 0) { 16549 output += " "; 16550 } 16551 output += "HAS_BOUNDS"; 16552 numFlags++; 16553 } 16554 16555 if ((privateFlags & PFLAG_DRAWN) == PFLAG_DRAWN) { 16556 if (numFlags > 0) { 16557 output += " "; 16558 } 16559 output += "DRAWN"; 16560 // USELESS HERE numFlags++; 16561 } 16562 return output; 16563 } 16564 16565 /** 16566 * <p>Indicates whether or not this view's layout will be requested during 16567 * the next hierarchy layout pass.</p> 16568 * 16569 * @return true if the layout will be forced during next layout pass 16570 */ 16571 public boolean isLayoutRequested() { 16572 return (mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT; 16573 } 16574 16575 /** 16576 * Return true if o is a ViewGroup that is laying out using optical bounds. 16577 * @hide 16578 */ 16579 public static boolean isLayoutModeOptical(Object o) { 16580 return o instanceof ViewGroup && ((ViewGroup) o).isLayoutModeOptical(); 16581 } 16582 16583 private boolean setOpticalFrame(int left, int top, int right, int bottom) { 16584 Insets parentInsets = mParent instanceof View ? 16585 ((View) mParent).getOpticalInsets() : Insets.NONE; 16586 Insets childInsets = getOpticalInsets(); 16587 return setFrame( 16588 left + parentInsets.left - childInsets.left, 16589 top + parentInsets.top - childInsets.top, 16590 right + parentInsets.left + childInsets.right, 16591 bottom + parentInsets.top + childInsets.bottom); 16592 } 16593 16594 /** 16595 * Assign a size and position to a view and all of its 16596 * descendants 16597 * 16598 * <p>This is the second phase of the layout mechanism. 16599 * (The first is measuring). In this phase, each parent calls 16600 * layout on all of its children to position them. 16601 * This is typically done using the child measurements 16602 * that were stored in the measure pass().</p> 16603 * 16604 * <p>Derived classes should not override this method. 16605 * Derived classes with children should override 16606 * onLayout. In that method, they should 16607 * call layout on each of their children.</p> 16608 * 16609 * @param l Left position, relative to parent 16610 * @param t Top position, relative to parent 16611 * @param r Right position, relative to parent 16612 * @param b Bottom position, relative to parent 16613 */ 16614 @SuppressWarnings({"unchecked"}) 16615 public void layout(int l, int t, int r, int b) { 16616 if ((mPrivateFlags3 & PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT) != 0) { 16617 onMeasure(mOldWidthMeasureSpec, mOldHeightMeasureSpec); 16618 mPrivateFlags3 &= ~PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; 16619 } 16620 16621 int oldL = mLeft; 16622 int oldT = mTop; 16623 int oldB = mBottom; 16624 int oldR = mRight; 16625 16626 boolean changed = isLayoutModeOptical(mParent) ? 16627 setOpticalFrame(l, t, r, b) : setFrame(l, t, r, b); 16628 16629 if (changed || (mPrivateFlags & PFLAG_LAYOUT_REQUIRED) == PFLAG_LAYOUT_REQUIRED) { 16630 onLayout(changed, l, t, r, b); 16631 mPrivateFlags &= ~PFLAG_LAYOUT_REQUIRED; 16632 16633 ListenerInfo li = mListenerInfo; 16634 if (li != null && li.mOnLayoutChangeListeners != null) { 16635 ArrayList<OnLayoutChangeListener> listenersCopy = 16636 (ArrayList<OnLayoutChangeListener>)li.mOnLayoutChangeListeners.clone(); 16637 int numListeners = listenersCopy.size(); 16638 for (int i = 0; i < numListeners; ++i) { 16639 listenersCopy.get(i).onLayoutChange(this, l, t, r, b, oldL, oldT, oldR, oldB); 16640 } 16641 } 16642 } 16643 16644 mPrivateFlags &= ~PFLAG_FORCE_LAYOUT; 16645 mPrivateFlags3 |= PFLAG3_IS_LAID_OUT; 16646 } 16647 16648 /** 16649 * Called from layout when this view should 16650 * assign a size and position to each of its children. 16651 * 16652 * Derived classes with children should override 16653 * this method and call layout on each of 16654 * their children. 16655 * @param changed This is a new size or position for this view 16656 * @param left Left position, relative to parent 16657 * @param top Top position, relative to parent 16658 * @param right Right position, relative to parent 16659 * @param bottom Bottom position, relative to parent 16660 */ 16661 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 16662 } 16663 16664 /** 16665 * Assign a size and position to this view. 16666 * 16667 * This is called from layout. 16668 * 16669 * @param left Left position, relative to parent 16670 * @param top Top position, relative to parent 16671 * @param right Right position, relative to parent 16672 * @param bottom Bottom position, relative to parent 16673 * @return true if the new size and position are different than the 16674 * previous ones 16675 * {@hide} 16676 */ 16677 protected boolean setFrame(int left, int top, int right, int bottom) { 16678 boolean changed = false; 16679 16680 if (DBG) { 16681 Log.d("View", this + " View.setFrame(" + left + "," + top + "," 16682 + right + "," + bottom + ")"); 16683 } 16684 16685 if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) { 16686 changed = true; 16687 16688 // Remember our drawn bit 16689 int drawn = mPrivateFlags & PFLAG_DRAWN; 16690 16691 int oldWidth = mRight - mLeft; 16692 int oldHeight = mBottom - mTop; 16693 int newWidth = right - left; 16694 int newHeight = bottom - top; 16695 boolean sizeChanged = (newWidth != oldWidth) || (newHeight != oldHeight); 16696 16697 // Invalidate our old position 16698 invalidate(sizeChanged); 16699 16700 mLeft = left; 16701 mTop = top; 16702 mRight = right; 16703 mBottom = bottom; 16704 mRenderNode.setLeftTopRightBottom(mLeft, mTop, mRight, mBottom); 16705 16706 mPrivateFlags |= PFLAG_HAS_BOUNDS; 16707 16708 16709 if (sizeChanged) { 16710 sizeChange(newWidth, newHeight, oldWidth, oldHeight); 16711 } 16712 16713 if ((mViewFlags & VISIBILITY_MASK) == VISIBLE || mGhostView != null) { 16714 // If we are visible, force the DRAWN bit to on so that 16715 // this invalidate will go through (at least to our parent). 16716 // This is because someone may have invalidated this view 16717 // before this call to setFrame came in, thereby clearing 16718 // the DRAWN bit. 16719 mPrivateFlags |= PFLAG_DRAWN; 16720 invalidate(sizeChanged); 16721 // parent display list may need to be recreated based on a change in the bounds 16722 // of any child 16723 invalidateParentCaches(); 16724 } 16725 16726 // Reset drawn bit to original value (invalidate turns it off) 16727 mPrivateFlags |= drawn; 16728 16729 mBackgroundSizeChanged = true; 16730 if (mForegroundInfo != null) { 16731 mForegroundInfo.mBoundsChanged = true; 16732 } 16733 16734 notifySubtreeAccessibilityStateChangedIfNeeded(); 16735 } 16736 return changed; 16737 } 16738 16739 /** 16740 * Same as setFrame, but public and hidden. For use in {@link android.transition.ChangeBounds}. 16741 * @hide 16742 */ 16743 public void setLeftTopRightBottom(int left, int top, int right, int bottom) { 16744 setFrame(left, top, right, bottom); 16745 } 16746 16747 private void sizeChange(int newWidth, int newHeight, int oldWidth, int oldHeight) { 16748 onSizeChanged(newWidth, newHeight, oldWidth, oldHeight); 16749 if (mOverlay != null) { 16750 mOverlay.getOverlayView().setRight(newWidth); 16751 mOverlay.getOverlayView().setBottom(newHeight); 16752 } 16753 rebuildOutline(); 16754 } 16755 16756 /** 16757 * Finalize inflating a view from XML. This is called as the last phase 16758 * of inflation, after all child views have been added. 16759 * 16760 * <p>Even if the subclass overrides onFinishInflate, they should always be 16761 * sure to call the super method, so that we get called. 16762 */ 16763 @CallSuper 16764 protected void onFinishInflate() { 16765 } 16766 16767 /** 16768 * Returns the resources associated with this view. 16769 * 16770 * @return Resources object. 16771 */ 16772 public Resources getResources() { 16773 return mResources; 16774 } 16775 16776 /** 16777 * Invalidates the specified Drawable. 16778 * 16779 * @param drawable the drawable to invalidate 16780 */ 16781 @Override 16782 public void invalidateDrawable(@NonNull Drawable drawable) { 16783 if (verifyDrawable(drawable)) { 16784 final Rect dirty = drawable.getDirtyBounds(); 16785 final int scrollX = mScrollX; 16786 final int scrollY = mScrollY; 16787 16788 invalidate(dirty.left + scrollX, dirty.top + scrollY, 16789 dirty.right + scrollX, dirty.bottom + scrollY); 16790 rebuildOutline(); 16791 } 16792 } 16793 16794 /** 16795 * Schedules an action on a drawable to occur at a specified time. 16796 * 16797 * @param who the recipient of the action 16798 * @param what the action to run on the drawable 16799 * @param when the time at which the action must occur. Uses the 16800 * {@link SystemClock#uptimeMillis} timebase. 16801 */ 16802 @Override 16803 public void scheduleDrawable(Drawable who, Runnable what, long when) { 16804 if (verifyDrawable(who) && what != null) { 16805 final long delay = when - SystemClock.uptimeMillis(); 16806 if (mAttachInfo != null) { 16807 mAttachInfo.mViewRootImpl.mChoreographer.postCallbackDelayed( 16808 Choreographer.CALLBACK_ANIMATION, what, who, 16809 Choreographer.subtractFrameDelay(delay)); 16810 } else { 16811 ViewRootImpl.getRunQueue().postDelayed(what, delay); 16812 } 16813 } 16814 } 16815 16816 /** 16817 * Cancels a scheduled action on a drawable. 16818 * 16819 * @param who the recipient of the action 16820 * @param what the action to cancel 16821 */ 16822 @Override 16823 public void unscheduleDrawable(Drawable who, Runnable what) { 16824 if (verifyDrawable(who) && what != null) { 16825 if (mAttachInfo != null) { 16826 mAttachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 16827 Choreographer.CALLBACK_ANIMATION, what, who); 16828 } 16829 ViewRootImpl.getRunQueue().removeCallbacks(what); 16830 } 16831 } 16832 16833 /** 16834 * Unschedule any events associated with the given Drawable. This can be 16835 * used when selecting a new Drawable into a view, so that the previous 16836 * one is completely unscheduled. 16837 * 16838 * @param who The Drawable to unschedule. 16839 * 16840 * @see #drawableStateChanged 16841 */ 16842 public void unscheduleDrawable(Drawable who) { 16843 if (mAttachInfo != null && who != null) { 16844 mAttachInfo.mViewRootImpl.mChoreographer.removeCallbacks( 16845 Choreographer.CALLBACK_ANIMATION, null, who); 16846 } 16847 } 16848 16849 /** 16850 * Resolve the Drawables depending on the layout direction. This is implicitly supposing 16851 * that the View directionality can and will be resolved before its Drawables. 16852 * 16853 * Will call {@link View#onResolveDrawables} when resolution is done. 16854 * 16855 * @hide 16856 */ 16857 protected void resolveDrawables() { 16858 // Drawables resolution may need to happen before resolving the layout direction (which is 16859 // done only during the measure() call). 16860 // If the layout direction is not resolved yet, we cannot resolve the Drawables except in 16861 // one case: when the raw layout direction has not been defined as LAYOUT_DIRECTION_INHERIT. 16862 // So, if the raw layout direction is LAYOUT_DIRECTION_LTR or LAYOUT_DIRECTION_RTL or 16863 // LAYOUT_DIRECTION_LOCALE, we can "cheat" and we don't need to wait for the layout 16864 // direction to be resolved as its resolved value will be the same as its raw value. 16865 if (!isLayoutDirectionResolved() && 16866 getRawLayoutDirection() == View.LAYOUT_DIRECTION_INHERIT) { 16867 return; 16868 } 16869 16870 final int layoutDirection = isLayoutDirectionResolved() ? 16871 getLayoutDirection() : getRawLayoutDirection(); 16872 16873 if (mBackground != null) { 16874 mBackground.setLayoutDirection(layoutDirection); 16875 } 16876 if (mForegroundInfo != null && mForegroundInfo.mDrawable != null) { 16877 mForegroundInfo.mDrawable.setLayoutDirection(layoutDirection); 16878 } 16879 mPrivateFlags2 |= PFLAG2_DRAWABLE_RESOLVED; 16880 onResolveDrawables(layoutDirection); 16881 } 16882 16883 boolean areDrawablesResolved() { 16884 return (mPrivateFlags2 & PFLAG2_DRAWABLE_RESOLVED) == PFLAG2_DRAWABLE_RESOLVED; 16885 } 16886 16887 /** 16888 * Called when layout direction has been resolved. 16889 * 16890 * The default implementation does nothing. 16891 * 16892 * @param layoutDirection The resolved layout direction. 16893 * 16894 * @see #LAYOUT_DIRECTION_LTR 16895 * @see #LAYOUT_DIRECTION_RTL 16896 * 16897 * @hide 16898 */ 16899 public void onResolveDrawables(@ResolvedLayoutDir int layoutDirection) { 16900 } 16901 16902 /** 16903 * @hide 16904 */ 16905 protected void resetResolvedDrawables() { 16906 resetResolvedDrawablesInternal(); 16907 } 16908 16909 void resetResolvedDrawablesInternal() { 16910 mPrivateFlags2 &= ~PFLAG2_DRAWABLE_RESOLVED; 16911 } 16912 16913 /** 16914 * If your view subclass is displaying its own Drawable objects, it should 16915 * override this function and return true for any Drawable it is 16916 * displaying. This allows animations for those drawables to be 16917 * scheduled. 16918 * 16919 * <p>Be sure to call through to the super class when overriding this 16920 * function. 16921 * 16922 * @param who The Drawable to verify. Return true if it is one you are 16923 * displaying, else return the result of calling through to the 16924 * super class. 16925 * 16926 * @return boolean If true than the Drawable is being displayed in the 16927 * view; else false and it is not allowed to animate. 16928 * 16929 * @see #unscheduleDrawable(android.graphics.drawable.Drawable) 16930 * @see #drawableStateChanged() 16931 */ 16932 @CallSuper 16933 protected boolean verifyDrawable(Drawable who) { 16934 return who == mBackground || (mScrollCache != null && mScrollCache.scrollBar == who) 16935 || (mForegroundInfo != null && mForegroundInfo.mDrawable == who); 16936 } 16937 16938 /** 16939 * This function is called whenever the state of the view changes in such 16940 * a way that it impacts the state of drawables being shown. 16941 * <p> 16942 * If the View has a StateListAnimator, it will also be called to run necessary state 16943 * change animations. 16944 * <p> 16945 * Be sure to call through to the superclass when overriding this function. 16946 * 16947 * @see Drawable#setState(int[]) 16948 */ 16949 @CallSuper 16950 protected void drawableStateChanged() { 16951 final int[] state = getDrawableState(); 16952 16953 final Drawable bg = mBackground; 16954 if (bg != null && bg.isStateful()) { 16955 bg.setState(state); 16956 } 16957 16958 final Drawable fg = mForegroundInfo != null ? mForegroundInfo.mDrawable : null; 16959 if (fg != null && fg.isStateful()) { 16960 fg.setState(state); 16961 } 16962 16963 if (mScrollCache != null) { 16964 final Drawable scrollBar = mScrollCache.scrollBar; 16965 if (scrollBar != null && scrollBar.isStateful()) { 16966 scrollBar.setState(state); 16967 } 16968 } 16969 16970 if (mStateListAnimator != null) { 16971 mStateListAnimator.setState(state); 16972 } 16973 } 16974 16975 /** 16976 * This function is called whenever the view hotspot changes and needs to 16977 * be propagated to drawables or child views managed by the view. 16978 * <p> 16979 * Dispatching to child views is handled by 16980 * {@link #dispatchDrawableHotspotChanged(float, float)}. 16981 * <p> 16982 * Be sure to call through to the superclass when overriding this function. 16983 * 16984 * @param x hotspot x coordinate 16985 * @param y hotspot y coordinate 16986 */ 16987 @CallSuper 16988 public void drawableHotspotChanged(float x, float y) { 16989 if (mBackground != null) { 16990 mBackground.setHotspot(x, y); 16991 } 16992 if (mForegroundInfo != null && mForegroundInfo.mDrawable != null) { 16993 mForegroundInfo.mDrawable.setHotspot(x, y); 16994 } 16995 16996 dispatchDrawableHotspotChanged(x, y); 16997 } 16998 16999 /** 17000 * Dispatches drawableHotspotChanged to all of this View's children. 17001 * 17002 * @param x hotspot x coordinate 17003 * @param y hotspot y coordinate 17004 * @see #drawableHotspotChanged(float, float) 17005 */ 17006 public void dispatchDrawableHotspotChanged(float x, float y) { 17007 } 17008 17009 /** 17010 * Call this to force a view to update its drawable state. This will cause 17011 * drawableStateChanged to be called on this view. Views that are interested 17012 * in the new state should call getDrawableState. 17013 * 17014 * @see #drawableStateChanged 17015 * @see #getDrawableState 17016 */ 17017 public void refreshDrawableState() { 17018 mPrivateFlags |= PFLAG_DRAWABLE_STATE_DIRTY; 17019 drawableStateChanged(); 17020 17021 ViewParent parent = mParent; 17022 if (parent != null) { 17023 parent.childDrawableStateChanged(this); 17024 } 17025 } 17026 17027 /** 17028 * Return an array of resource IDs of the drawable states representing the 17029 * current state of the view. 17030 * 17031 * @return The current drawable state 17032 * 17033 * @see Drawable#setState(int[]) 17034 * @see #drawableStateChanged() 17035 * @see #onCreateDrawableState(int) 17036 */ 17037 public final int[] getDrawableState() { 17038 if ((mDrawableState != null) && ((mPrivateFlags & PFLAG_DRAWABLE_STATE_DIRTY) == 0)) { 17039 return mDrawableState; 17040 } else { 17041 mDrawableState = onCreateDrawableState(0); 17042 mPrivateFlags &= ~PFLAG_DRAWABLE_STATE_DIRTY; 17043 return mDrawableState; 17044 } 17045 } 17046 17047 /** 17048 * Generate the new {@link android.graphics.drawable.Drawable} state for 17049 * this view. This is called by the view 17050 * system when the cached Drawable state is determined to be invalid. To 17051 * retrieve the current state, you should use {@link #getDrawableState}. 17052 * 17053 * @param extraSpace if non-zero, this is the number of extra entries you 17054 * would like in the returned array in which you can place your own 17055 * states. 17056 * 17057 * @return Returns an array holding the current {@link Drawable} state of 17058 * the view. 17059 * 17060 * @see #mergeDrawableStates(int[], int[]) 17061 */ 17062 protected int[] onCreateDrawableState(int extraSpace) { 17063 if ((mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE && 17064 mParent instanceof View) { 17065 return ((View) mParent).onCreateDrawableState(extraSpace); 17066 } 17067 17068 int[] drawableState; 17069 17070 int privateFlags = mPrivateFlags; 17071 17072 int viewStateIndex = 0; 17073 if ((privateFlags & PFLAG_PRESSED) != 0) viewStateIndex |= StateSet.VIEW_STATE_PRESSED; 17074 if ((mViewFlags & ENABLED_MASK) == ENABLED) viewStateIndex |= StateSet.VIEW_STATE_ENABLED; 17075 if (isFocused()) viewStateIndex |= StateSet.VIEW_STATE_FOCUSED; 17076 if ((privateFlags & PFLAG_SELECTED) != 0) viewStateIndex |= StateSet.VIEW_STATE_SELECTED; 17077 if (hasWindowFocus()) viewStateIndex |= StateSet.VIEW_STATE_WINDOW_FOCUSED; 17078 if ((privateFlags & PFLAG_ACTIVATED) != 0) viewStateIndex |= StateSet.VIEW_STATE_ACTIVATED; 17079 if (mAttachInfo != null && mAttachInfo.mHardwareAccelerationRequested && 17080 HardwareRenderer.isAvailable()) { 17081 // This is set if HW acceleration is requested, even if the current 17082 // process doesn't allow it. This is just to allow app preview 17083 // windows to better match their app. 17084 viewStateIndex |= StateSet.VIEW_STATE_ACCELERATED; 17085 } 17086 if ((privateFlags & PFLAG_HOVERED) != 0) viewStateIndex |= StateSet.VIEW_STATE_HOVERED; 17087 17088 final int privateFlags2 = mPrivateFlags2; 17089 if ((privateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0) { 17090 viewStateIndex |= StateSet.VIEW_STATE_DRAG_CAN_ACCEPT; 17091 } 17092 if ((privateFlags2 & PFLAG2_DRAG_HOVERED) != 0) { 17093 viewStateIndex |= StateSet.VIEW_STATE_DRAG_HOVERED; 17094 } 17095 17096 drawableState = StateSet.get(viewStateIndex); 17097 17098 //noinspection ConstantIfStatement 17099 if (false) { 17100 Log.i("View", "drawableStateIndex=" + viewStateIndex); 17101 Log.i("View", toString() 17102 + " pressed=" + ((privateFlags & PFLAG_PRESSED) != 0) 17103 + " en=" + ((mViewFlags & ENABLED_MASK) == ENABLED) 17104 + " fo=" + hasFocus() 17105 + " sl=" + ((privateFlags & PFLAG_SELECTED) != 0) 17106 + " wf=" + hasWindowFocus() 17107 + ": " + Arrays.toString(drawableState)); 17108 } 17109 17110 if (extraSpace == 0) { 17111 return drawableState; 17112 } 17113 17114 final int[] fullState; 17115 if (drawableState != null) { 17116 fullState = new int[drawableState.length + extraSpace]; 17117 System.arraycopy(drawableState, 0, fullState, 0, drawableState.length); 17118 } else { 17119 fullState = new int[extraSpace]; 17120 } 17121 17122 return fullState; 17123 } 17124 17125 /** 17126 * Merge your own state values in <var>additionalState</var> into the base 17127 * state values <var>baseState</var> that were returned by 17128 * {@link #onCreateDrawableState(int)}. 17129 * 17130 * @param baseState The base state values returned by 17131 * {@link #onCreateDrawableState(int)}, which will be modified to also hold your 17132 * own additional state values. 17133 * 17134 * @param additionalState The additional state values you would like 17135 * added to <var>baseState</var>; this array is not modified. 17136 * 17137 * @return As a convenience, the <var>baseState</var> array you originally 17138 * passed into the function is returned. 17139 * 17140 * @see #onCreateDrawableState(int) 17141 */ 17142 protected static int[] mergeDrawableStates(int[] baseState, int[] additionalState) { 17143 final int N = baseState.length; 17144 int i = N - 1; 17145 while (i >= 0 && baseState[i] == 0) { 17146 i--; 17147 } 17148 System.arraycopy(additionalState, 0, baseState, i + 1, additionalState.length); 17149 return baseState; 17150 } 17151 17152 /** 17153 * Call {@link Drawable#jumpToCurrentState() Drawable.jumpToCurrentState()} 17154 * on all Drawable objects associated with this view. 17155 * <p> 17156 * Also calls {@link StateListAnimator#jumpToCurrentState()} if there is a StateListAnimator 17157 * attached to this view. 17158 */ 17159 @CallSuper 17160 public void jumpDrawablesToCurrentState() { 17161 if (mBackground != null) { 17162 mBackground.jumpToCurrentState(); 17163 } 17164 if (mStateListAnimator != null) { 17165 mStateListAnimator.jumpToCurrentState(); 17166 } 17167 if (mForegroundInfo != null && mForegroundInfo.mDrawable != null) { 17168 mForegroundInfo.mDrawable.jumpToCurrentState(); 17169 } 17170 } 17171 17172 /** 17173 * Sets the background color for this view. 17174 * @param color the color of the background 17175 */ 17176 @RemotableViewMethod 17177 public void setBackgroundColor(@ColorInt int color) { 17178 if (mBackground instanceof ColorDrawable) { 17179 ((ColorDrawable) mBackground.mutate()).setColor(color); 17180 computeOpaqueFlags(); 17181 mBackgroundResource = 0; 17182 } else { 17183 setBackground(new ColorDrawable(color)); 17184 } 17185 } 17186 17187 /** 17188 * Set the background to a given resource. The resource should refer to 17189 * a Drawable object or 0 to remove the background. 17190 * @param resid The identifier of the resource. 17191 * 17192 * @attr ref android.R.styleable#View_background 17193 */ 17194 @RemotableViewMethod 17195 public void setBackgroundResource(@DrawableRes int resid) { 17196 if (resid != 0 && resid == mBackgroundResource) { 17197 return; 17198 } 17199 17200 Drawable d = null; 17201 if (resid != 0) { 17202 d = mContext.getDrawable(resid); 17203 } 17204 setBackground(d); 17205 17206 mBackgroundResource = resid; 17207 } 17208 17209 /** 17210 * Set the background to a given Drawable, or remove the background. If the 17211 * background has padding, this View's padding is set to the background's 17212 * padding. However, when a background is removed, this View's padding isn't 17213 * touched. If setting the padding is desired, please use 17214 * {@link #setPadding(int, int, int, int)}. 17215 * 17216 * @param background The Drawable to use as the background, or null to remove the 17217 * background 17218 */ 17219 public void setBackground(Drawable background) { 17220 //noinspection deprecation 17221 setBackgroundDrawable(background); 17222 } 17223 17224 /** 17225 * @deprecated use {@link #setBackground(Drawable)} instead 17226 */ 17227 @Deprecated 17228 public void setBackgroundDrawable(Drawable background) { 17229 computeOpaqueFlags(); 17230 17231 if (background == mBackground) { 17232 return; 17233 } 17234 17235 boolean requestLayout = false; 17236 17237 mBackgroundResource = 0; 17238 17239 /* 17240 * Regardless of whether we're setting a new background or not, we want 17241 * to clear the previous drawable. 17242 */ 17243 if (mBackground != null) { 17244 mBackground.setCallback(null); 17245 unscheduleDrawable(mBackground); 17246 } 17247 17248 if (background != null) { 17249 Rect padding = sThreadLocal.get(); 17250 if (padding == null) { 17251 padding = new Rect(); 17252 sThreadLocal.set(padding); 17253 } 17254 resetResolvedDrawablesInternal(); 17255 background.setLayoutDirection(getLayoutDirection()); 17256 if (background.getPadding(padding)) { 17257 resetResolvedPaddingInternal(); 17258 switch (background.getLayoutDirection()) { 17259 case LAYOUT_DIRECTION_RTL: 17260 mUserPaddingLeftInitial = padding.right; 17261 mUserPaddingRightInitial = padding.left; 17262 internalSetPadding(padding.right, padding.top, padding.left, padding.bottom); 17263 break; 17264 case LAYOUT_DIRECTION_LTR: 17265 default: 17266 mUserPaddingLeftInitial = padding.left; 17267 mUserPaddingRightInitial = padding.right; 17268 internalSetPadding(padding.left, padding.top, padding.right, padding.bottom); 17269 } 17270 mLeftPaddingDefined = false; 17271 mRightPaddingDefined = false; 17272 } 17273 17274 // Compare the minimum sizes of the old Drawable and the new. If there isn't an old or 17275 // if it has a different minimum size, we should layout again 17276 if (mBackground == null 17277 || mBackground.getMinimumHeight() != background.getMinimumHeight() 17278 || mBackground.getMinimumWidth() != background.getMinimumWidth()) { 17279 requestLayout = true; 17280 } 17281 17282 background.setCallback(this); 17283 if (background.isStateful()) { 17284 background.setState(getDrawableState()); 17285 } 17286 background.setVisible(getVisibility() == VISIBLE, false); 17287 mBackground = background; 17288 17289 applyBackgroundTint(); 17290 17291 if ((mPrivateFlags & PFLAG_SKIP_DRAW) != 0) { 17292 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 17293 requestLayout = true; 17294 } 17295 } else { 17296 /* Remove the background */ 17297 mBackground = null; 17298 if ((mViewFlags & WILL_NOT_DRAW) != 0 17299 && (mForegroundInfo == null || mForegroundInfo.mDrawable == null)) { 17300 mPrivateFlags |= PFLAG_SKIP_DRAW; 17301 } 17302 17303 /* 17304 * When the background is set, we try to apply its padding to this 17305 * View. When the background is removed, we don't touch this View's 17306 * padding. This is noted in the Javadocs. Hence, we don't need to 17307 * requestLayout(), the invalidate() below is sufficient. 17308 */ 17309 17310 // The old background's minimum size could have affected this 17311 // View's layout, so let's requestLayout 17312 requestLayout = true; 17313 } 17314 17315 computeOpaqueFlags(); 17316 17317 if (requestLayout) { 17318 requestLayout(); 17319 } 17320 17321 mBackgroundSizeChanged = true; 17322 invalidate(true); 17323 } 17324 17325 /** 17326 * Gets the background drawable 17327 * 17328 * @return The drawable used as the background for this view, if any. 17329 * 17330 * @see #setBackground(Drawable) 17331 * 17332 * @attr ref android.R.styleable#View_background 17333 */ 17334 public Drawable getBackground() { 17335 return mBackground; 17336 } 17337 17338 /** 17339 * Applies a tint to the background drawable. Does not modify the current tint 17340 * mode, which is {@link PorterDuff.Mode#SRC_IN} by default. 17341 * <p> 17342 * Subsequent calls to {@link #setBackground(Drawable)} will automatically 17343 * mutate the drawable and apply the specified tint and tint mode using 17344 * {@link Drawable#setTintList(ColorStateList)}. 17345 * 17346 * @param tint the tint to apply, may be {@code null} to clear tint 17347 * 17348 * @attr ref android.R.styleable#View_backgroundTint 17349 * @see #getBackgroundTintList() 17350 * @see Drawable#setTintList(ColorStateList) 17351 */ 17352 public void setBackgroundTintList(@Nullable ColorStateList tint) { 17353 if (mBackgroundTint == null) { 17354 mBackgroundTint = new TintInfo(); 17355 } 17356 mBackgroundTint.mTintList = tint; 17357 mBackgroundTint.mHasTintList = true; 17358 17359 applyBackgroundTint(); 17360 } 17361 17362 /** 17363 * Return the tint applied to the background drawable, if specified. 17364 * 17365 * @return the tint applied to the background drawable 17366 * @attr ref android.R.styleable#View_backgroundTint 17367 * @see #setBackgroundTintList(ColorStateList) 17368 */ 17369 @Nullable 17370 public ColorStateList getBackgroundTintList() { 17371 return mBackgroundTint != null ? mBackgroundTint.mTintList : null; 17372 } 17373 17374 /** 17375 * Specifies the blending mode used to apply the tint specified by 17376 * {@link #setBackgroundTintList(ColorStateList)}} to the background 17377 * drawable. The default mode is {@link PorterDuff.Mode#SRC_IN}. 17378 * 17379 * @param tintMode the blending mode used to apply the tint, may be 17380 * {@code null} to clear tint 17381 * @attr ref android.R.styleable#View_backgroundTintMode 17382 * @see #getBackgroundTintMode() 17383 * @see Drawable#setTintMode(PorterDuff.Mode) 17384 */ 17385 public void setBackgroundTintMode(@Nullable PorterDuff.Mode tintMode) { 17386 if (mBackgroundTint == null) { 17387 mBackgroundTint = new TintInfo(); 17388 } 17389 mBackgroundTint.mTintMode = tintMode; 17390 mBackgroundTint.mHasTintMode = true; 17391 17392 applyBackgroundTint(); 17393 } 17394 17395 /** 17396 * Return the blending mode used to apply the tint to the background 17397 * drawable, if specified. 17398 * 17399 * @return the blending mode used to apply the tint to the background 17400 * drawable 17401 * @attr ref android.R.styleable#View_backgroundTintMode 17402 * @see #setBackgroundTintMode(PorterDuff.Mode) 17403 */ 17404 @Nullable 17405 public PorterDuff.Mode getBackgroundTintMode() { 17406 return mBackgroundTint != null ? mBackgroundTint.mTintMode : null; 17407 } 17408 17409 private void applyBackgroundTint() { 17410 if (mBackground != null && mBackgroundTint != null) { 17411 final TintInfo tintInfo = mBackgroundTint; 17412 if (tintInfo.mHasTintList || tintInfo.mHasTintMode) { 17413 mBackground = mBackground.mutate(); 17414 17415 if (tintInfo.mHasTintList) { 17416 mBackground.setTintList(tintInfo.mTintList); 17417 } 17418 17419 if (tintInfo.mHasTintMode) { 17420 mBackground.setTintMode(tintInfo.mTintMode); 17421 } 17422 17423 // The drawable (or one of its children) may not have been 17424 // stateful before applying the tint, so let's try again. 17425 if (mBackground.isStateful()) { 17426 mBackground.setState(getDrawableState()); 17427 } 17428 } 17429 } 17430 } 17431 17432 /** 17433 * Returns the drawable used as the foreground of this View. The 17434 * foreground drawable, if non-null, is always drawn on top of the view's content. 17435 * 17436 * @return a Drawable or null if no foreground was set 17437 * 17438 * @see #onDrawForeground(Canvas) 17439 */ 17440 public Drawable getForeground() { 17441 return mForegroundInfo != null ? mForegroundInfo.mDrawable : null; 17442 } 17443 17444 /** 17445 * Supply a Drawable that is to be rendered on top of all of the content in the view. 17446 * 17447 * @param foreground the Drawable to be drawn on top of the children 17448 * 17449 * @attr ref android.R.styleable#View_foreground 17450 */ 17451 public void setForeground(Drawable foreground) { 17452 if (mForegroundInfo == null) { 17453 if (foreground == null) { 17454 // Nothing to do. 17455 return; 17456 } 17457 mForegroundInfo = new ForegroundInfo(); 17458 } 17459 17460 if (foreground == mForegroundInfo.mDrawable) { 17461 // Nothing to do 17462 return; 17463 } 17464 17465 if (mForegroundInfo.mDrawable != null) { 17466 mForegroundInfo.mDrawable.setCallback(null); 17467 unscheduleDrawable(mForegroundInfo.mDrawable); 17468 } 17469 17470 mForegroundInfo.mDrawable = foreground; 17471 mForegroundInfo.mBoundsChanged = true; 17472 if (foreground != null) { 17473 if ((mPrivateFlags & PFLAG_SKIP_DRAW) != 0) { 17474 mPrivateFlags &= ~PFLAG_SKIP_DRAW; 17475 } 17476 foreground.setCallback(this); 17477 foreground.setLayoutDirection(getLayoutDirection()); 17478 if (foreground.isStateful()) { 17479 foreground.setState(getDrawableState()); 17480 } 17481 applyForegroundTint(); 17482 } else if ((mViewFlags & WILL_NOT_DRAW) != 0 && mBackground == null) { 17483 mPrivateFlags |= PFLAG_SKIP_DRAW; 17484 } 17485 requestLayout(); 17486 invalidate(); 17487 } 17488 17489 /** 17490 * Magic bit used to support features of framework-internal window decor implementation details. 17491 * This used to live exclusively in FrameLayout. 17492 * 17493 * @return true if the foreground should draw inside the padding region or false 17494 * if it should draw inset by the view's padding 17495 * @hide internal use only; only used by FrameLayout and internal screen layouts. 17496 */ 17497 public boolean isForegroundInsidePadding() { 17498 return mForegroundInfo != null ? mForegroundInfo.mInsidePadding : true; 17499 } 17500 17501 /** 17502 * Describes how the foreground is positioned. 17503 * 17504 * @return foreground gravity. 17505 * 17506 * @see #setForegroundGravity(int) 17507 * 17508 * @attr ref android.R.styleable#View_foregroundGravity 17509 */ 17510 public int getForegroundGravity() { 17511 return mForegroundInfo != null ? mForegroundInfo.mGravity 17512 : Gravity.START | Gravity.TOP; 17513 } 17514 17515 /** 17516 * Describes how the foreground is positioned. Defaults to START and TOP. 17517 * 17518 * @param gravity see {@link android.view.Gravity} 17519 * 17520 * @see #getForegroundGravity() 17521 * 17522 * @attr ref android.R.styleable#View_foregroundGravity 17523 */ 17524 public void setForegroundGravity(int gravity) { 17525 if (mForegroundInfo == null) { 17526 mForegroundInfo = new ForegroundInfo(); 17527 } 17528 17529 if (mForegroundInfo.mGravity != gravity) { 17530 if ((gravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK) == 0) { 17531 gravity |= Gravity.START; 17532 } 17533 17534 if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) { 17535 gravity |= Gravity.TOP; 17536 } 17537 17538 mForegroundInfo.mGravity = gravity; 17539 requestLayout(); 17540 } 17541 } 17542 17543 /** 17544 * Applies a tint to the foreground drawable. Does not modify the current tint 17545 * mode, which is {@link PorterDuff.Mode#SRC_IN} by default. 17546 * <p> 17547 * Subsequent calls to {@link #setForeground(Drawable)} will automatically 17548 * mutate the drawable and apply the specified tint and tint mode using 17549 * {@link Drawable#setTintList(ColorStateList)}. 17550 * 17551 * @param tint the tint to apply, may be {@code null} to clear tint 17552 * 17553 * @attr ref android.R.styleable#View_foregroundTint 17554 * @see #getForegroundTintList() 17555 * @see Drawable#setTintList(ColorStateList) 17556 */ 17557 public void setForegroundTintList(@Nullable ColorStateList tint) { 17558 if (mForegroundInfo == null) { 17559 mForegroundInfo = new ForegroundInfo(); 17560 } 17561 if (mForegroundInfo.mTintInfo == null) { 17562 mForegroundInfo.mTintInfo = new TintInfo(); 17563 } 17564 mForegroundInfo.mTintInfo.mTintList = tint; 17565 mForegroundInfo.mTintInfo.mHasTintList = true; 17566 17567 applyForegroundTint(); 17568 } 17569 17570 /** 17571 * Return the tint applied to the foreground drawable, if specified. 17572 * 17573 * @return the tint applied to the foreground drawable 17574 * @attr ref android.R.styleable#View_foregroundTint 17575 * @see #setForegroundTintList(ColorStateList) 17576 */ 17577 @Nullable 17578 public ColorStateList getForegroundTintList() { 17579 return mForegroundInfo != null && mForegroundInfo.mTintInfo != null 17580 ? mForegroundInfo.mTintInfo.mTintList : null; 17581 } 17582 17583 /** 17584 * Specifies the blending mode used to apply the tint specified by 17585 * {@link #setForegroundTintList(ColorStateList)}} to the background 17586 * drawable. The default mode is {@link PorterDuff.Mode#SRC_IN}. 17587 * 17588 * @param tintMode the blending mode used to apply the tint, may be 17589 * {@code null} to clear tint 17590 * @attr ref android.R.styleable#View_foregroundTintMode 17591 * @see #getForegroundTintMode() 17592 * @see Drawable#setTintMode(PorterDuff.Mode) 17593 */ 17594 public void setForegroundTintMode(@Nullable PorterDuff.Mode tintMode) { 17595 if (mForegroundInfo == null) { 17596 mForegroundInfo = new ForegroundInfo(); 17597 } 17598 if (mForegroundInfo.mTintInfo == null) { 17599 mForegroundInfo.mTintInfo = new TintInfo(); 17600 } 17601 mForegroundInfo.mTintInfo.mTintMode = tintMode; 17602 mForegroundInfo.mTintInfo.mHasTintMode = true; 17603 17604 applyForegroundTint(); 17605 } 17606 17607 /** 17608 * Return the blending mode used to apply the tint to the foreground 17609 * drawable, if specified. 17610 * 17611 * @return the blending mode used to apply the tint to the foreground 17612 * drawable 17613 * @attr ref android.R.styleable#View_foregroundTintMode 17614 * @see #setForegroundTintMode(PorterDuff.Mode) 17615 */ 17616 @Nullable 17617 public PorterDuff.Mode getForegroundTintMode() { 17618 return mForegroundInfo != null && mForegroundInfo.mTintInfo != null 17619 ? mForegroundInfo.mTintInfo.mTintMode : null; 17620 } 17621 17622 private void applyForegroundTint() { 17623 if (mForegroundInfo != null && mForegroundInfo.mDrawable != null 17624 && mForegroundInfo.mTintInfo != null) { 17625 final TintInfo tintInfo = mForegroundInfo.mTintInfo; 17626 if (tintInfo.mHasTintList || tintInfo.mHasTintMode) { 17627 mForegroundInfo.mDrawable = mForegroundInfo.mDrawable.mutate(); 17628 17629 if (tintInfo.mHasTintList) { 17630 mForegroundInfo.mDrawable.setTintList(tintInfo.mTintList); 17631 } 17632 17633 if (tintInfo.mHasTintMode) { 17634 mForegroundInfo.mDrawable.setTintMode(tintInfo.mTintMode); 17635 } 17636 17637 // The drawable (or one of its children) may not have been 17638 // stateful before applying the tint, so let's try again. 17639 if (mForegroundInfo.mDrawable.isStateful()) { 17640 mForegroundInfo.mDrawable.setState(getDrawableState()); 17641 } 17642 } 17643 } 17644 } 17645 17646 /** 17647 * Draw any foreground content for this view. 17648 * 17649 * <p>Foreground content may consist of scroll bars, a {@link #setForeground foreground} 17650 * drawable or other view-specific decorations. The foreground is drawn on top of the 17651 * primary view content.</p> 17652 * 17653 * @param canvas canvas to draw into 17654 */ 17655 public void onDrawForeground(Canvas canvas) { 17656 onDrawScrollIndicators(canvas); 17657 onDrawScrollBars(canvas); 17658 17659 final Drawable foreground = mForegroundInfo != null ? mForegroundInfo.mDrawable : null; 17660 if (foreground != null) { 17661 if (mForegroundInfo.mBoundsChanged) { 17662 mForegroundInfo.mBoundsChanged = false; 17663 final Rect selfBounds = mForegroundInfo.mSelfBounds; 17664 final Rect overlayBounds = mForegroundInfo.mOverlayBounds; 17665 17666 if (mForegroundInfo.mInsidePadding) { 17667 selfBounds.set(0, 0, getWidth(), getHeight()); 17668 } else { 17669 selfBounds.set(getPaddingLeft(), getPaddingTop(), 17670 getWidth() - getPaddingRight(), getHeight() - getPaddingBottom()); 17671 } 17672 17673 final int ld = getLayoutDirection(); 17674 Gravity.apply(mForegroundInfo.mGravity, foreground.getIntrinsicWidth(), 17675 foreground.getIntrinsicHeight(), selfBounds, overlayBounds, ld); 17676 foreground.setBounds(overlayBounds); 17677 } 17678 17679 foreground.draw(canvas); 17680 } 17681 } 17682 17683 /** 17684 * Sets the padding. The view may add on the space required to display 17685 * the scrollbars, depending on the style and visibility of the scrollbars. 17686 * So the values returned from {@link #getPaddingLeft}, {@link #getPaddingTop}, 17687 * {@link #getPaddingRight} and {@link #getPaddingBottom} may be different 17688 * from the values set in this call. 17689 * 17690 * @attr ref android.R.styleable#View_padding 17691 * @attr ref android.R.styleable#View_paddingBottom 17692 * @attr ref android.R.styleable#View_paddingLeft 17693 * @attr ref android.R.styleable#View_paddingRight 17694 * @attr ref android.R.styleable#View_paddingTop 17695 * @param left the left padding in pixels 17696 * @param top the top padding in pixels 17697 * @param right the right padding in pixels 17698 * @param bottom the bottom padding in pixels 17699 */ 17700 public void setPadding(int left, int top, int right, int bottom) { 17701 resetResolvedPaddingInternal(); 17702 17703 mUserPaddingStart = UNDEFINED_PADDING; 17704 mUserPaddingEnd = UNDEFINED_PADDING; 17705 17706 mUserPaddingLeftInitial = left; 17707 mUserPaddingRightInitial = right; 17708 17709 mLeftPaddingDefined = true; 17710 mRightPaddingDefined = true; 17711 17712 internalSetPadding(left, top, right, bottom); 17713 } 17714 17715 /** 17716 * @hide 17717 */ 17718 protected void internalSetPadding(int left, int top, int right, int bottom) { 17719 mUserPaddingLeft = left; 17720 mUserPaddingRight = right; 17721 mUserPaddingBottom = bottom; 17722 17723 final int viewFlags = mViewFlags; 17724 boolean changed = false; 17725 17726 // Common case is there are no scroll bars. 17727 if ((viewFlags & (SCROLLBARS_VERTICAL|SCROLLBARS_HORIZONTAL)) != 0) { 17728 if ((viewFlags & SCROLLBARS_VERTICAL) != 0) { 17729 final int offset = (viewFlags & SCROLLBARS_INSET_MASK) == 0 17730 ? 0 : getVerticalScrollbarWidth(); 17731 switch (mVerticalScrollbarPosition) { 17732 case SCROLLBAR_POSITION_DEFAULT: 17733 if (isLayoutRtl()) { 17734 left += offset; 17735 } else { 17736 right += offset; 17737 } 17738 break; 17739 case SCROLLBAR_POSITION_RIGHT: 17740 right += offset; 17741 break; 17742 case SCROLLBAR_POSITION_LEFT: 17743 left += offset; 17744 break; 17745 } 17746 } 17747 if ((viewFlags & SCROLLBARS_HORIZONTAL) != 0) { 17748 bottom += (viewFlags & SCROLLBARS_INSET_MASK) == 0 17749 ? 0 : getHorizontalScrollbarHeight(); 17750 } 17751 } 17752 17753 if (mPaddingLeft != left) { 17754 changed = true; 17755 mPaddingLeft = left; 17756 } 17757 if (mPaddingTop != top) { 17758 changed = true; 17759 mPaddingTop = top; 17760 } 17761 if (mPaddingRight != right) { 17762 changed = true; 17763 mPaddingRight = right; 17764 } 17765 if (mPaddingBottom != bottom) { 17766 changed = true; 17767 mPaddingBottom = bottom; 17768 } 17769 17770 if (changed) { 17771 requestLayout(); 17772 invalidateOutline(); 17773 } 17774 } 17775 17776 /** 17777 * Sets the relative padding. The view may add on the space required to display 17778 * the scrollbars, depending on the style and visibility of the scrollbars. 17779 * So the values returned from {@link #getPaddingStart}, {@link #getPaddingTop}, 17780 * {@link #getPaddingEnd} and {@link #getPaddingBottom} may be different 17781 * from the values set in this call. 17782 * 17783 * @attr ref android.R.styleable#View_padding 17784 * @attr ref android.R.styleable#View_paddingBottom 17785 * @attr ref android.R.styleable#View_paddingStart 17786 * @attr ref android.R.styleable#View_paddingEnd 17787 * @attr ref android.R.styleable#View_paddingTop 17788 * @param start the start padding in pixels 17789 * @param top the top padding in pixels 17790 * @param end the end padding in pixels 17791 * @param bottom the bottom padding in pixels 17792 */ 17793 public void setPaddingRelative(int start, int top, int end, int bottom) { 17794 resetResolvedPaddingInternal(); 17795 17796 mUserPaddingStart = start; 17797 mUserPaddingEnd = end; 17798 mLeftPaddingDefined = true; 17799 mRightPaddingDefined = true; 17800 17801 switch(getLayoutDirection()) { 17802 case LAYOUT_DIRECTION_RTL: 17803 mUserPaddingLeftInitial = end; 17804 mUserPaddingRightInitial = start; 17805 internalSetPadding(end, top, start, bottom); 17806 break; 17807 case LAYOUT_DIRECTION_LTR: 17808 default: 17809 mUserPaddingLeftInitial = start; 17810 mUserPaddingRightInitial = end; 17811 internalSetPadding(start, top, end, bottom); 17812 } 17813 } 17814 17815 /** 17816 * Returns the top padding of this view. 17817 * 17818 * @return the top padding in pixels 17819 */ 17820 public int getPaddingTop() { 17821 return mPaddingTop; 17822 } 17823 17824 /** 17825 * Returns the bottom padding of this view. If there are inset and enabled 17826 * scrollbars, this value may include the space required to display the 17827 * scrollbars as well. 17828 * 17829 * @return the bottom padding in pixels 17830 */ 17831 public int getPaddingBottom() { 17832 return mPaddingBottom; 17833 } 17834 17835 /** 17836 * Returns the left padding of this view. If there are inset and enabled 17837 * scrollbars, this value may include the space required to display the 17838 * scrollbars as well. 17839 * 17840 * @return the left padding in pixels 17841 */ 17842 public int getPaddingLeft() { 17843 if (!isPaddingResolved()) { 17844 resolvePadding(); 17845 } 17846 return mPaddingLeft; 17847 } 17848 17849 /** 17850 * Returns the start padding of this view depending on its resolved layout direction. 17851 * If there are inset and enabled scrollbars, this value may include the space 17852 * required to display the scrollbars as well. 17853 * 17854 * @return the start padding in pixels 17855 */ 17856 public int getPaddingStart() { 17857 if (!isPaddingResolved()) { 17858 resolvePadding(); 17859 } 17860 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? 17861 mPaddingRight : mPaddingLeft; 17862 } 17863 17864 /** 17865 * Returns the right padding of this view. If there are inset and enabled 17866 * scrollbars, this value may include the space required to display the 17867 * scrollbars as well. 17868 * 17869 * @return the right padding in pixels 17870 */ 17871 public int getPaddingRight() { 17872 if (!isPaddingResolved()) { 17873 resolvePadding(); 17874 } 17875 return mPaddingRight; 17876 } 17877 17878 /** 17879 * Returns the end padding of this view depending on its resolved layout direction. 17880 * If there are inset and enabled scrollbars, this value may include the space 17881 * required to display the scrollbars as well. 17882 * 17883 * @return the end padding in pixels 17884 */ 17885 public int getPaddingEnd() { 17886 if (!isPaddingResolved()) { 17887 resolvePadding(); 17888 } 17889 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL) ? 17890 mPaddingLeft : mPaddingRight; 17891 } 17892 17893 /** 17894 * Return if the padding has been set through relative values 17895 * {@link #setPaddingRelative(int, int, int, int)} or through 17896 * @attr ref android.R.styleable#View_paddingStart or 17897 * @attr ref android.R.styleable#View_paddingEnd 17898 * 17899 * @return true if the padding is relative or false if it is not. 17900 */ 17901 public boolean isPaddingRelative() { 17902 return (mUserPaddingStart != UNDEFINED_PADDING || mUserPaddingEnd != UNDEFINED_PADDING); 17903 } 17904 17905 Insets computeOpticalInsets() { 17906 return (mBackground == null) ? Insets.NONE : mBackground.getOpticalInsets(); 17907 } 17908 17909 /** 17910 * @hide 17911 */ 17912 public void resetPaddingToInitialValues() { 17913 if (isRtlCompatibilityMode()) { 17914 mPaddingLeft = mUserPaddingLeftInitial; 17915 mPaddingRight = mUserPaddingRightInitial; 17916 return; 17917 } 17918 if (isLayoutRtl()) { 17919 mPaddingLeft = (mUserPaddingEnd >= 0) ? mUserPaddingEnd : mUserPaddingLeftInitial; 17920 mPaddingRight = (mUserPaddingStart >= 0) ? mUserPaddingStart : mUserPaddingRightInitial; 17921 } else { 17922 mPaddingLeft = (mUserPaddingStart >= 0) ? mUserPaddingStart : mUserPaddingLeftInitial; 17923 mPaddingRight = (mUserPaddingEnd >= 0) ? mUserPaddingEnd : mUserPaddingRightInitial; 17924 } 17925 } 17926 17927 /** 17928 * @hide 17929 */ 17930 public Insets getOpticalInsets() { 17931 if (mLayoutInsets == null) { 17932 mLayoutInsets = computeOpticalInsets(); 17933 } 17934 return mLayoutInsets; 17935 } 17936 17937 /** 17938 * Set this view's optical insets. 17939 * 17940 * <p>This method should be treated similarly to setMeasuredDimension and not as a general 17941 * property. Views that compute their own optical insets should call it as part of measurement. 17942 * This method does not request layout. If you are setting optical insets outside of 17943 * measure/layout itself you will want to call requestLayout() yourself. 17944 * </p> 17945 * @hide 17946 */ 17947 public void setOpticalInsets(Insets insets) { 17948 mLayoutInsets = insets; 17949 } 17950 17951 /** 17952 * Changes the selection state of this view. A view can be selected or not. 17953 * Note that selection is not the same as focus. Views are typically 17954 * selected in the context of an AdapterView like ListView or GridView; 17955 * the selected view is the view that is highlighted. 17956 * 17957 * @param selected true if the view must be selected, false otherwise 17958 */ 17959 public void setSelected(boolean selected) { 17960 //noinspection DoubleNegation 17961 if (((mPrivateFlags & PFLAG_SELECTED) != 0) != selected) { 17962 mPrivateFlags = (mPrivateFlags & ~PFLAG_SELECTED) | (selected ? PFLAG_SELECTED : 0); 17963 if (!selected) resetPressedState(); 17964 invalidate(true); 17965 refreshDrawableState(); 17966 dispatchSetSelected(selected); 17967 if (selected) { 17968 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SELECTED); 17969 } else { 17970 notifyViewAccessibilityStateChangedIfNeeded( 17971 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 17972 } 17973 } 17974 } 17975 17976 /** 17977 * Dispatch setSelected to all of this View's children. 17978 * 17979 * @see #setSelected(boolean) 17980 * 17981 * @param selected The new selected state 17982 */ 17983 protected void dispatchSetSelected(boolean selected) { 17984 } 17985 17986 /** 17987 * Indicates the selection state of this view. 17988 * 17989 * @return true if the view is selected, false otherwise 17990 */ 17991 @ViewDebug.ExportedProperty 17992 public boolean isSelected() { 17993 return (mPrivateFlags & PFLAG_SELECTED) != 0; 17994 } 17995 17996 /** 17997 * Changes the activated state of this view. A view can be activated or not. 17998 * Note that activation is not the same as selection. Selection is 17999 * a transient property, representing the view (hierarchy) the user is 18000 * currently interacting with. Activation is a longer-term state that the 18001 * user can move views in and out of. For example, in a list view with 18002 * single or multiple selection enabled, the views in the current selection 18003 * set are activated. (Um, yeah, we are deeply sorry about the terminology 18004 * here.) The activated state is propagated down to children of the view it 18005 * is set on. 18006 * 18007 * @param activated true if the view must be activated, false otherwise 18008 */ 18009 public void setActivated(boolean activated) { 18010 //noinspection DoubleNegation 18011 if (((mPrivateFlags & PFLAG_ACTIVATED) != 0) != activated) { 18012 mPrivateFlags = (mPrivateFlags & ~PFLAG_ACTIVATED) | (activated ? PFLAG_ACTIVATED : 0); 18013 invalidate(true); 18014 refreshDrawableState(); 18015 dispatchSetActivated(activated); 18016 } 18017 } 18018 18019 /** 18020 * Dispatch setActivated to all of this View's children. 18021 * 18022 * @see #setActivated(boolean) 18023 * 18024 * @param activated The new activated state 18025 */ 18026 protected void dispatchSetActivated(boolean activated) { 18027 } 18028 18029 /** 18030 * Indicates the activation state of this view. 18031 * 18032 * @return true if the view is activated, false otherwise 18033 */ 18034 @ViewDebug.ExportedProperty 18035 public boolean isActivated() { 18036 return (mPrivateFlags & PFLAG_ACTIVATED) != 0; 18037 } 18038 18039 /** 18040 * Returns the ViewTreeObserver for this view's hierarchy. The view tree 18041 * observer can be used to get notifications when global events, like 18042 * layout, happen. 18043 * 18044 * The returned ViewTreeObserver observer is not guaranteed to remain 18045 * valid for the lifetime of this View. If the caller of this method keeps 18046 * a long-lived reference to ViewTreeObserver, it should always check for 18047 * the return value of {@link ViewTreeObserver#isAlive()}. 18048 * 18049 * @return The ViewTreeObserver for this view's hierarchy. 18050 */ 18051 public ViewTreeObserver getViewTreeObserver() { 18052 if (mAttachInfo != null) { 18053 return mAttachInfo.mTreeObserver; 18054 } 18055 if (mFloatingTreeObserver == null) { 18056 mFloatingTreeObserver = new ViewTreeObserver(); 18057 } 18058 return mFloatingTreeObserver; 18059 } 18060 18061 /** 18062 * <p>Finds the topmost view in the current view hierarchy.</p> 18063 * 18064 * @return the topmost view containing this view 18065 */ 18066 public View getRootView() { 18067 if (mAttachInfo != null) { 18068 final View v = mAttachInfo.mRootView; 18069 if (v != null) { 18070 return v; 18071 } 18072 } 18073 18074 View parent = this; 18075 18076 while (parent.mParent != null && parent.mParent instanceof View) { 18077 parent = (View) parent.mParent; 18078 } 18079 18080 return parent; 18081 } 18082 18083 /** 18084 * Transforms a motion event from view-local coordinates to on-screen 18085 * coordinates. 18086 * 18087 * @param ev the view-local motion event 18088 * @return false if the transformation could not be applied 18089 * @hide 18090 */ 18091 public boolean toGlobalMotionEvent(MotionEvent ev) { 18092 final AttachInfo info = mAttachInfo; 18093 if (info == null) { 18094 return false; 18095 } 18096 18097 final Matrix m = info.mTmpMatrix; 18098 m.set(Matrix.IDENTITY_MATRIX); 18099 transformMatrixToGlobal(m); 18100 ev.transform(m); 18101 return true; 18102 } 18103 18104 /** 18105 * Transforms a motion event from on-screen coordinates to view-local 18106 * coordinates. 18107 * 18108 * @param ev the on-screen motion event 18109 * @return false if the transformation could not be applied 18110 * @hide 18111 */ 18112 public boolean toLocalMotionEvent(MotionEvent ev) { 18113 final AttachInfo info = mAttachInfo; 18114 if (info == null) { 18115 return false; 18116 } 18117 18118 final Matrix m = info.mTmpMatrix; 18119 m.set(Matrix.IDENTITY_MATRIX); 18120 transformMatrixToLocal(m); 18121 ev.transform(m); 18122 return true; 18123 } 18124 18125 /** 18126 * Modifies the input matrix such that it maps view-local coordinates to 18127 * on-screen coordinates. 18128 * 18129 * @param m input matrix to modify 18130 * @hide 18131 */ 18132 public void transformMatrixToGlobal(Matrix m) { 18133 final ViewParent parent = mParent; 18134 if (parent instanceof View) { 18135 final View vp = (View) parent; 18136 vp.transformMatrixToGlobal(m); 18137 m.preTranslate(-vp.mScrollX, -vp.mScrollY); 18138 } else if (parent instanceof ViewRootImpl) { 18139 final ViewRootImpl vr = (ViewRootImpl) parent; 18140 vr.transformMatrixToGlobal(m); 18141 m.preTranslate(0, -vr.mCurScrollY); 18142 } 18143 18144 m.preTranslate(mLeft, mTop); 18145 18146 if (!hasIdentityMatrix()) { 18147 m.preConcat(getMatrix()); 18148 } 18149 } 18150 18151 /** 18152 * Modifies the input matrix such that it maps on-screen coordinates to 18153 * view-local coordinates. 18154 * 18155 * @param m input matrix to modify 18156 * @hide 18157 */ 18158 public void transformMatrixToLocal(Matrix m) { 18159 final ViewParent parent = mParent; 18160 if (parent instanceof View) { 18161 final View vp = (View) parent; 18162 vp.transformMatrixToLocal(m); 18163 m.postTranslate(vp.mScrollX, vp.mScrollY); 18164 } else if (parent instanceof ViewRootImpl) { 18165 final ViewRootImpl vr = (ViewRootImpl) parent; 18166 vr.transformMatrixToLocal(m); 18167 m.postTranslate(0, vr.mCurScrollY); 18168 } 18169 18170 m.postTranslate(-mLeft, -mTop); 18171 18172 if (!hasIdentityMatrix()) { 18173 m.postConcat(getInverseMatrix()); 18174 } 18175 } 18176 18177 /** 18178 * @hide 18179 */ 18180 @ViewDebug.ExportedProperty(category = "layout", indexMapping = { 18181 @ViewDebug.IntToString(from = 0, to = "x"), 18182 @ViewDebug.IntToString(from = 1, to = "y") 18183 }) 18184 public int[] getLocationOnScreen() { 18185 int[] location = new int[2]; 18186 getLocationOnScreen(location); 18187 return location; 18188 } 18189 18190 /** 18191 * <p>Computes the coordinates of this view on the screen. The argument 18192 * must be an array of two integers. After the method returns, the array 18193 * contains the x and y location in that order.</p> 18194 * 18195 * @param location an array of two integers in which to hold the coordinates 18196 */ 18197 public void getLocationOnScreen(@Size(2) int[] location) { 18198 getLocationInWindow(location); 18199 18200 final AttachInfo info = mAttachInfo; 18201 if (info != null) { 18202 location[0] += info.mWindowLeft; 18203 location[1] += info.mWindowTop; 18204 } 18205 } 18206 18207 /** 18208 * <p>Computes the coordinates of this view in its window. The argument 18209 * must be an array of two integers. After the method returns, the array 18210 * contains the x and y location in that order.</p> 18211 * 18212 * @param location an array of two integers in which to hold the coordinates 18213 */ 18214 public void getLocationInWindow(@Size(2) int[] location) { 18215 if (location == null || location.length < 2) { 18216 throw new IllegalArgumentException("location must be an array of two integers"); 18217 } 18218 18219 if (mAttachInfo == null) { 18220 // When the view is not attached to a window, this method does not make sense 18221 location[0] = location[1] = 0; 18222 return; 18223 } 18224 18225 float[] position = mAttachInfo.mTmpTransformLocation; 18226 position[0] = position[1] = 0.0f; 18227 18228 if (!hasIdentityMatrix()) { 18229 getMatrix().mapPoints(position); 18230 } 18231 18232 position[0] += mLeft; 18233 position[1] += mTop; 18234 18235 ViewParent viewParent = mParent; 18236 while (viewParent instanceof View) { 18237 final View view = (View) viewParent; 18238 18239 position[0] -= view.mScrollX; 18240 position[1] -= view.mScrollY; 18241 18242 if (!view.hasIdentityMatrix()) { 18243 view.getMatrix().mapPoints(position); 18244 } 18245 18246 position[0] += view.mLeft; 18247 position[1] += view.mTop; 18248 18249 viewParent = view.mParent; 18250 } 18251 18252 if (viewParent instanceof ViewRootImpl) { 18253 // *cough* 18254 final ViewRootImpl vr = (ViewRootImpl) viewParent; 18255 position[1] -= vr.mCurScrollY; 18256 } 18257 18258 location[0] = (int) (position[0] + 0.5f); 18259 location[1] = (int) (position[1] + 0.5f); 18260 } 18261 18262 /** 18263 * {@hide} 18264 * @param id the id of the view to be found 18265 * @return the view of the specified id, null if cannot be found 18266 */ 18267 protected View findViewTraversal(@IdRes int id) { 18268 if (id == mID) { 18269 return this; 18270 } 18271 return null; 18272 } 18273 18274 /** 18275 * {@hide} 18276 * @param tag the tag of the view to be found 18277 * @return the view of specified tag, null if cannot be found 18278 */ 18279 protected View findViewWithTagTraversal(Object tag) { 18280 if (tag != null && tag.equals(mTag)) { 18281 return this; 18282 } 18283 return null; 18284 } 18285 18286 /** 18287 * {@hide} 18288 * @param predicate The predicate to evaluate. 18289 * @param childToSkip If not null, ignores this child during the recursive traversal. 18290 * @return The first view that matches the predicate or null. 18291 */ 18292 protected View findViewByPredicateTraversal(Predicate<View> predicate, View childToSkip) { 18293 if (predicate.apply(this)) { 18294 return this; 18295 } 18296 return null; 18297 } 18298 18299 /** 18300 * Look for a child view with the given id. If this view has the given 18301 * id, return this view. 18302 * 18303 * @param id The id to search for. 18304 * @return The view that has the given id in the hierarchy or null 18305 */ 18306 @Nullable 18307 public final View findViewById(@IdRes int id) { 18308 if (id < 0) { 18309 return null; 18310 } 18311 return findViewTraversal(id); 18312 } 18313 18314 /** 18315 * Finds a view by its unuque and stable accessibility id. 18316 * 18317 * @param accessibilityId The searched accessibility id. 18318 * @return The found view. 18319 */ 18320 final View findViewByAccessibilityId(int accessibilityId) { 18321 if (accessibilityId < 0) { 18322 return null; 18323 } 18324 View view = findViewByAccessibilityIdTraversal(accessibilityId); 18325 if (view != null) { 18326 return view.includeForAccessibility() ? view : null; 18327 } 18328 return null; 18329 } 18330 18331 /** 18332 * Performs the traversal to find a view by its unuque and stable accessibility id. 18333 * 18334 * <strong>Note:</strong>This method does not stop at the root namespace 18335 * boundary since the user can touch the screen at an arbitrary location 18336 * potentially crossing the root namespace bounday which will send an 18337 * accessibility event to accessibility services and they should be able 18338 * to obtain the event source. Also accessibility ids are guaranteed to be 18339 * unique in the window. 18340 * 18341 * @param accessibilityId The accessibility id. 18342 * @return The found view. 18343 * 18344 * @hide 18345 */ 18346 public View findViewByAccessibilityIdTraversal(int accessibilityId) { 18347 if (getAccessibilityViewId() == accessibilityId) { 18348 return this; 18349 } 18350 return null; 18351 } 18352 18353 /** 18354 * Look for a child view with the given tag. If this view has the given 18355 * tag, return this view. 18356 * 18357 * @param tag The tag to search for, using "tag.equals(getTag())". 18358 * @return The View that has the given tag in the hierarchy or null 18359 */ 18360 public final View findViewWithTag(Object tag) { 18361 if (tag == null) { 18362 return null; 18363 } 18364 return findViewWithTagTraversal(tag); 18365 } 18366 18367 /** 18368 * {@hide} 18369 * Look for a child view that matches the specified predicate. 18370 * If this view matches the predicate, return this view. 18371 * 18372 * @param predicate The predicate to evaluate. 18373 * @return The first view that matches the predicate or null. 18374 */ 18375 public final View findViewByPredicate(Predicate<View> predicate) { 18376 return findViewByPredicateTraversal(predicate, null); 18377 } 18378 18379 /** 18380 * {@hide} 18381 * Look for a child view that matches the specified predicate, 18382 * starting with the specified view and its descendents and then 18383 * recusively searching the ancestors and siblings of that view 18384 * until this view is reached. 18385 * 18386 * This method is useful in cases where the predicate does not match 18387 * a single unique view (perhaps multiple views use the same id) 18388 * and we are trying to find the view that is "closest" in scope to the 18389 * starting view. 18390 * 18391 * @param start The view to start from. 18392 * @param predicate The predicate to evaluate. 18393 * @return The first view that matches the predicate or null. 18394 */ 18395 public final View findViewByPredicateInsideOut(View start, Predicate<View> predicate) { 18396 View childToSkip = null; 18397 for (;;) { 18398 View view = start.findViewByPredicateTraversal(predicate, childToSkip); 18399 if (view != null || start == this) { 18400 return view; 18401 } 18402 18403 ViewParent parent = start.getParent(); 18404 if (parent == null || !(parent instanceof View)) { 18405 return null; 18406 } 18407 18408 childToSkip = start; 18409 start = (View) parent; 18410 } 18411 } 18412 18413 /** 18414 * Sets the identifier for this view. The identifier does not have to be 18415 * unique in this view's hierarchy. The identifier should be a positive 18416 * number. 18417 * 18418 * @see #NO_ID 18419 * @see #getId() 18420 * @see #findViewById(int) 18421 * 18422 * @param id a number used to identify the view 18423 * 18424 * @attr ref android.R.styleable#View_id 18425 */ 18426 public void setId(@IdRes int id) { 18427 mID = id; 18428 if (mID == View.NO_ID && mLabelForId != View.NO_ID) { 18429 mID = generateViewId(); 18430 } 18431 } 18432 18433 /** 18434 * {@hide} 18435 * 18436 * @param isRoot true if the view belongs to the root namespace, false 18437 * otherwise 18438 */ 18439 public void setIsRootNamespace(boolean isRoot) { 18440 if (isRoot) { 18441 mPrivateFlags |= PFLAG_IS_ROOT_NAMESPACE; 18442 } else { 18443 mPrivateFlags &= ~PFLAG_IS_ROOT_NAMESPACE; 18444 } 18445 } 18446 18447 /** 18448 * {@hide} 18449 * 18450 * @return true if the view belongs to the root namespace, false otherwise 18451 */ 18452 public boolean isRootNamespace() { 18453 return (mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0; 18454 } 18455 18456 /** 18457 * Returns this view's identifier. 18458 * 18459 * @return a positive integer used to identify the view or {@link #NO_ID} 18460 * if the view has no ID 18461 * 18462 * @see #setId(int) 18463 * @see #findViewById(int) 18464 * @attr ref android.R.styleable#View_id 18465 */ 18466 @IdRes 18467 @ViewDebug.CapturedViewProperty 18468 public int getId() { 18469 return mID; 18470 } 18471 18472 /** 18473 * Returns this view's tag. 18474 * 18475 * @return the Object stored in this view as a tag, or {@code null} if not 18476 * set 18477 * 18478 * @see #setTag(Object) 18479 * @see #getTag(int) 18480 */ 18481 @ViewDebug.ExportedProperty 18482 public Object getTag() { 18483 return mTag; 18484 } 18485 18486 /** 18487 * Sets the tag associated with this view. A tag can be used to mark 18488 * a view in its hierarchy and does not have to be unique within the 18489 * hierarchy. Tags can also be used to store data within a view without 18490 * resorting to another data structure. 18491 * 18492 * @param tag an Object to tag the view with 18493 * 18494 * @see #getTag() 18495 * @see #setTag(int, Object) 18496 */ 18497 public void setTag(final Object tag) { 18498 mTag = tag; 18499 } 18500 18501 /** 18502 * Returns the tag associated with this view and the specified key. 18503 * 18504 * @param key The key identifying the tag 18505 * 18506 * @return the Object stored in this view as a tag, or {@code null} if not 18507 * set 18508 * 18509 * @see #setTag(int, Object) 18510 * @see #getTag() 18511 */ 18512 public Object getTag(int key) { 18513 if (mKeyedTags != null) return mKeyedTags.get(key); 18514 return null; 18515 } 18516 18517 /** 18518 * Sets a tag associated with this view and a key. A tag can be used 18519 * to mark a view in its hierarchy and does not have to be unique within 18520 * the hierarchy. Tags can also be used to store data within a view 18521 * without resorting to another data structure. 18522 * 18523 * The specified key should be an id declared in the resources of the 18524 * application to ensure it is unique (see the <a 18525 * href="{@docRoot}guide/topics/resources/more-resources.html#Id">ID resource type</a>). 18526 * Keys identified as belonging to 18527 * the Android framework or not associated with any package will cause 18528 * an {@link IllegalArgumentException} to be thrown. 18529 * 18530 * @param key The key identifying the tag 18531 * @param tag An Object to tag the view with 18532 * 18533 * @throws IllegalArgumentException If they specified key is not valid 18534 * 18535 * @see #setTag(Object) 18536 * @see #getTag(int) 18537 */ 18538 public void setTag(int key, final Object tag) { 18539 // If the package id is 0x00 or 0x01, it's either an undefined package 18540 // or a framework id 18541 if ((key >>> 24) < 2) { 18542 throw new IllegalArgumentException("The key must be an application-specific " 18543 + "resource id."); 18544 } 18545 18546 setKeyedTag(key, tag); 18547 } 18548 18549 /** 18550 * Variation of {@link #setTag(int, Object)} that enforces the key to be a 18551 * framework id. 18552 * 18553 * @hide 18554 */ 18555 public void setTagInternal(int key, Object tag) { 18556 if ((key >>> 24) != 0x1) { 18557 throw new IllegalArgumentException("The key must be a framework-specific " 18558 + "resource id."); 18559 } 18560 18561 setKeyedTag(key, tag); 18562 } 18563 18564 private void setKeyedTag(int key, Object tag) { 18565 if (mKeyedTags == null) { 18566 mKeyedTags = new SparseArray<Object>(2); 18567 } 18568 18569 mKeyedTags.put(key, tag); 18570 } 18571 18572 /** 18573 * Prints information about this view in the log output, with the tag 18574 * {@link #VIEW_LOG_TAG}. 18575 * 18576 * @hide 18577 */ 18578 public void debug() { 18579 debug(0); 18580 } 18581 18582 /** 18583 * Prints information about this view in the log output, with the tag 18584 * {@link #VIEW_LOG_TAG}. Each line in the output is preceded with an 18585 * indentation defined by the <code>depth</code>. 18586 * 18587 * @param depth the indentation level 18588 * 18589 * @hide 18590 */ 18591 protected void debug(int depth) { 18592 String output = debugIndent(depth - 1); 18593 18594 output += "+ " + this; 18595 int id = getId(); 18596 if (id != -1) { 18597 output += " (id=" + id + ")"; 18598 } 18599 Object tag = getTag(); 18600 if (tag != null) { 18601 output += " (tag=" + tag + ")"; 18602 } 18603 Log.d(VIEW_LOG_TAG, output); 18604 18605 if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { 18606 output = debugIndent(depth) + " FOCUSED"; 18607 Log.d(VIEW_LOG_TAG, output); 18608 } 18609 18610 output = debugIndent(depth); 18611 output += "frame={" + mLeft + ", " + mTop + ", " + mRight 18612 + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY 18613 + "} "; 18614 Log.d(VIEW_LOG_TAG, output); 18615 18616 if (mPaddingLeft != 0 || mPaddingTop != 0 || mPaddingRight != 0 18617 || mPaddingBottom != 0) { 18618 output = debugIndent(depth); 18619 output += "padding={" + mPaddingLeft + ", " + mPaddingTop 18620 + ", " + mPaddingRight + ", " + mPaddingBottom + "}"; 18621 Log.d(VIEW_LOG_TAG, output); 18622 } 18623 18624 output = debugIndent(depth); 18625 output += "mMeasureWidth=" + mMeasuredWidth + 18626 " mMeasureHeight=" + mMeasuredHeight; 18627 Log.d(VIEW_LOG_TAG, output); 18628 18629 output = debugIndent(depth); 18630 if (mLayoutParams == null) { 18631 output += "BAD! no layout params"; 18632 } else { 18633 output = mLayoutParams.debug(output); 18634 } 18635 Log.d(VIEW_LOG_TAG, output); 18636 18637 output = debugIndent(depth); 18638 output += "flags={"; 18639 output += View.printFlags(mViewFlags); 18640 output += "}"; 18641 Log.d(VIEW_LOG_TAG, output); 18642 18643 output = debugIndent(depth); 18644 output += "privateFlags={"; 18645 output += View.printPrivateFlags(mPrivateFlags); 18646 output += "}"; 18647 Log.d(VIEW_LOG_TAG, output); 18648 } 18649 18650 /** 18651 * Creates a string of whitespaces used for indentation. 18652 * 18653 * @param depth the indentation level 18654 * @return a String containing (depth * 2 + 3) * 2 white spaces 18655 * 18656 * @hide 18657 */ 18658 protected static String debugIndent(int depth) { 18659 StringBuilder spaces = new StringBuilder((depth * 2 + 3) * 2); 18660 for (int i = 0; i < (depth * 2) + 3; i++) { 18661 spaces.append(' ').append(' '); 18662 } 18663 return spaces.toString(); 18664 } 18665 18666 /** 18667 * <p>Return the offset of the widget's text baseline from the widget's top 18668 * boundary. If this widget does not support baseline alignment, this 18669 * method returns -1. </p> 18670 * 18671 * @return the offset of the baseline within the widget's bounds or -1 18672 * if baseline alignment is not supported 18673 */ 18674 @ViewDebug.ExportedProperty(category = "layout") 18675 public int getBaseline() { 18676 return -1; 18677 } 18678 18679 /** 18680 * Returns whether the view hierarchy is currently undergoing a layout pass. This 18681 * information is useful to avoid situations such as calling {@link #requestLayout()} during 18682 * a layout pass. 18683 * 18684 * @return whether the view hierarchy is currently undergoing a layout pass 18685 */ 18686 public boolean isInLayout() { 18687 ViewRootImpl viewRoot = getViewRootImpl(); 18688 return (viewRoot != null && viewRoot.isInLayout()); 18689 } 18690 18691 /** 18692 * Call this when something has changed which has invalidated the 18693 * layout of this view. This will schedule a layout pass of the view 18694 * tree. This should not be called while the view hierarchy is currently in a layout 18695 * pass ({@link #isInLayout()}. If layout is happening, the request may be honored at the 18696 * end of the current layout pass (and then layout will run again) or after the current 18697 * frame is drawn and the next layout occurs. 18698 * 18699 * <p>Subclasses which override this method should call the superclass method to 18700 * handle possible request-during-layout errors correctly.</p> 18701 */ 18702 @CallSuper 18703 public void requestLayout() { 18704 if (mMeasureCache != null) mMeasureCache.clear(); 18705 18706 if (mAttachInfo != null && mAttachInfo.mViewRequestingLayout == null) { 18707 // Only trigger request-during-layout logic if this is the view requesting it, 18708 // not the views in its parent hierarchy 18709 ViewRootImpl viewRoot = getViewRootImpl(); 18710 if (viewRoot != null && viewRoot.isInLayout()) { 18711 if (!viewRoot.requestLayoutDuringLayout(this)) { 18712 return; 18713 } 18714 } 18715 mAttachInfo.mViewRequestingLayout = this; 18716 } 18717 18718 mPrivateFlags |= PFLAG_FORCE_LAYOUT; 18719 mPrivateFlags |= PFLAG_INVALIDATED; 18720 18721 if (mParent != null && !mParent.isLayoutRequested()) { 18722 mParent.requestLayout(); 18723 } 18724 if (mAttachInfo != null && mAttachInfo.mViewRequestingLayout == this) { 18725 mAttachInfo.mViewRequestingLayout = null; 18726 } 18727 } 18728 18729 /** 18730 * Forces this view to be laid out during the next layout pass. 18731 * This method does not call requestLayout() or forceLayout() 18732 * on the parent. 18733 */ 18734 public void forceLayout() { 18735 if (mMeasureCache != null) mMeasureCache.clear(); 18736 18737 mPrivateFlags |= PFLAG_FORCE_LAYOUT; 18738 mPrivateFlags |= PFLAG_INVALIDATED; 18739 } 18740 18741 /** 18742 * <p> 18743 * This is called to find out how big a view should be. The parent 18744 * supplies constraint information in the width and height parameters. 18745 * </p> 18746 * 18747 * <p> 18748 * The actual measurement work of a view is performed in 18749 * {@link #onMeasure(int, int)}, called by this method. Therefore, only 18750 * {@link #onMeasure(int, int)} can and must be overridden by subclasses. 18751 * </p> 18752 * 18753 * 18754 * @param widthMeasureSpec Horizontal space requirements as imposed by the 18755 * parent 18756 * @param heightMeasureSpec Vertical space requirements as imposed by the 18757 * parent 18758 * 18759 * @see #onMeasure(int, int) 18760 */ 18761 public final void measure(int widthMeasureSpec, int heightMeasureSpec) { 18762 boolean optical = isLayoutModeOptical(this); 18763 if (optical != isLayoutModeOptical(mParent)) { 18764 Insets insets = getOpticalInsets(); 18765 int oWidth = insets.left + insets.right; 18766 int oHeight = insets.top + insets.bottom; 18767 widthMeasureSpec = MeasureSpec.adjust(widthMeasureSpec, optical ? -oWidth : oWidth); 18768 heightMeasureSpec = MeasureSpec.adjust(heightMeasureSpec, optical ? -oHeight : oHeight); 18769 } 18770 18771 // Suppress sign extension for the low bytes 18772 long key = (long) widthMeasureSpec << 32 | (long) heightMeasureSpec & 0xffffffffL; 18773 if (mMeasureCache == null) mMeasureCache = new LongSparseLongArray(2); 18774 18775 if ((mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT || 18776 widthMeasureSpec != mOldWidthMeasureSpec || 18777 heightMeasureSpec != mOldHeightMeasureSpec) { 18778 18779 // first clears the measured dimension flag 18780 mPrivateFlags &= ~PFLAG_MEASURED_DIMENSION_SET; 18781 18782 resolveRtlPropertiesIfNeeded(); 18783 18784 int cacheIndex = (mPrivateFlags & PFLAG_FORCE_LAYOUT) == PFLAG_FORCE_LAYOUT ? -1 : 18785 mMeasureCache.indexOfKey(key); 18786 if (cacheIndex < 0 || sIgnoreMeasureCache) { 18787 // measure ourselves, this should set the measured dimension flag back 18788 onMeasure(widthMeasureSpec, heightMeasureSpec); 18789 mPrivateFlags3 &= ~PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; 18790 } else { 18791 long value = mMeasureCache.valueAt(cacheIndex); 18792 // Casting a long to int drops the high 32 bits, no mask needed 18793 setMeasuredDimensionRaw((int) (value >> 32), (int) value); 18794 mPrivateFlags3 |= PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT; 18795 } 18796 18797 // flag not set, setMeasuredDimension() was not invoked, we raise 18798 // an exception to warn the developer 18799 if ((mPrivateFlags & PFLAG_MEASURED_DIMENSION_SET) != PFLAG_MEASURED_DIMENSION_SET) { 18800 throw new IllegalStateException("View with id " + getId() + ": " 18801 + getClass().getName() + "#onMeasure() did not set the" 18802 + " measured dimension by calling" 18803 + " setMeasuredDimension()"); 18804 } 18805 18806 mPrivateFlags |= PFLAG_LAYOUT_REQUIRED; 18807 } 18808 18809 mOldWidthMeasureSpec = widthMeasureSpec; 18810 mOldHeightMeasureSpec = heightMeasureSpec; 18811 18812 mMeasureCache.put(key, ((long) mMeasuredWidth) << 32 | 18813 (long) mMeasuredHeight & 0xffffffffL); // suppress sign extension 18814 } 18815 18816 /** 18817 * <p> 18818 * Measure the view and its content to determine the measured width and the 18819 * measured height. This method is invoked by {@link #measure(int, int)} and 18820 * should be overridden by subclasses to provide accurate and efficient 18821 * measurement of their contents. 18822 * </p> 18823 * 18824 * <p> 18825 * <strong>CONTRACT:</strong> When overriding this method, you 18826 * <em>must</em> call {@link #setMeasuredDimension(int, int)} to store the 18827 * measured width and height of this view. Failure to do so will trigger an 18828 * <code>IllegalStateException</code>, thrown by 18829 * {@link #measure(int, int)}. Calling the superclass' 18830 * {@link #onMeasure(int, int)} is a valid use. 18831 * </p> 18832 * 18833 * <p> 18834 * The base class implementation of measure defaults to the background size, 18835 * unless a larger size is allowed by the MeasureSpec. Subclasses should 18836 * override {@link #onMeasure(int, int)} to provide better measurements of 18837 * their content. 18838 * </p> 18839 * 18840 * <p> 18841 * If this method is overridden, it is the subclass's responsibility to make 18842 * sure the measured height and width are at least the view's minimum height 18843 * and width ({@link #getSuggestedMinimumHeight()} and 18844 * {@link #getSuggestedMinimumWidth()}). 18845 * </p> 18846 * 18847 * @param widthMeasureSpec horizontal space requirements as imposed by the parent. 18848 * The requirements are encoded with 18849 * {@link android.view.View.MeasureSpec}. 18850 * @param heightMeasureSpec vertical space requirements as imposed by the parent. 18851 * The requirements are encoded with 18852 * {@link android.view.View.MeasureSpec}. 18853 * 18854 * @see #getMeasuredWidth() 18855 * @see #getMeasuredHeight() 18856 * @see #setMeasuredDimension(int, int) 18857 * @see #getSuggestedMinimumHeight() 18858 * @see #getSuggestedMinimumWidth() 18859 * @see android.view.View.MeasureSpec#getMode(int) 18860 * @see android.view.View.MeasureSpec#getSize(int) 18861 */ 18862 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 18863 setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec), 18864 getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec)); 18865 } 18866 18867 /** 18868 * <p>This method must be called by {@link #onMeasure(int, int)} to store the 18869 * measured width and measured height. Failing to do so will trigger an 18870 * exception at measurement time.</p> 18871 * 18872 * @param measuredWidth The measured width of this view. May be a complex 18873 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 18874 * {@link #MEASURED_STATE_TOO_SMALL}. 18875 * @param measuredHeight The measured height of this view. May be a complex 18876 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 18877 * {@link #MEASURED_STATE_TOO_SMALL}. 18878 */ 18879 protected final void setMeasuredDimension(int measuredWidth, int measuredHeight) { 18880 boolean optical = isLayoutModeOptical(this); 18881 if (optical != isLayoutModeOptical(mParent)) { 18882 Insets insets = getOpticalInsets(); 18883 int opticalWidth = insets.left + insets.right; 18884 int opticalHeight = insets.top + insets.bottom; 18885 18886 measuredWidth += optical ? opticalWidth : -opticalWidth; 18887 measuredHeight += optical ? opticalHeight : -opticalHeight; 18888 } 18889 setMeasuredDimensionRaw(measuredWidth, measuredHeight); 18890 } 18891 18892 /** 18893 * Sets the measured dimension without extra processing for things like optical bounds. 18894 * Useful for reapplying consistent values that have already been cooked with adjustments 18895 * for optical bounds, etc. such as those from the measurement cache. 18896 * 18897 * @param measuredWidth The measured width of this view. May be a complex 18898 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 18899 * {@link #MEASURED_STATE_TOO_SMALL}. 18900 * @param measuredHeight The measured height of this view. May be a complex 18901 * bit mask as defined by {@link #MEASURED_SIZE_MASK} and 18902 * {@link #MEASURED_STATE_TOO_SMALL}. 18903 */ 18904 private void setMeasuredDimensionRaw(int measuredWidth, int measuredHeight) { 18905 mMeasuredWidth = measuredWidth; 18906 mMeasuredHeight = measuredHeight; 18907 18908 mPrivateFlags |= PFLAG_MEASURED_DIMENSION_SET; 18909 } 18910 18911 /** 18912 * Merge two states as returned by {@link #getMeasuredState()}. 18913 * @param curState The current state as returned from a view or the result 18914 * of combining multiple views. 18915 * @param newState The new view state to combine. 18916 * @return Returns a new integer reflecting the combination of the two 18917 * states. 18918 */ 18919 public static int combineMeasuredStates(int curState, int newState) { 18920 return curState | newState; 18921 } 18922 18923 /** 18924 * Version of {@link #resolveSizeAndState(int, int, int)} 18925 * returning only the {@link #MEASURED_SIZE_MASK} bits of the result. 18926 */ 18927 public static int resolveSize(int size, int measureSpec) { 18928 return resolveSizeAndState(size, measureSpec, 0) & MEASURED_SIZE_MASK; 18929 } 18930 18931 /** 18932 * Utility to reconcile a desired size and state, with constraints imposed 18933 * by a MeasureSpec. Will take the desired size, unless a different size 18934 * is imposed by the constraints. The returned value is a compound integer, 18935 * with the resolved size in the {@link #MEASURED_SIZE_MASK} bits and 18936 * optionally the bit {@link #MEASURED_STATE_TOO_SMALL} set if the 18937 * resulting size is smaller than the size the view wants to be. 18938 * 18939 * @param size How big the view wants to be. 18940 * @param measureSpec Constraints imposed by the parent. 18941 * @param childMeasuredState Size information bit mask for the view's 18942 * children. 18943 * @return Size information bit mask as defined by 18944 * {@link #MEASURED_SIZE_MASK} and 18945 * {@link #MEASURED_STATE_TOO_SMALL}. 18946 */ 18947 public static int resolveSizeAndState(int size, int measureSpec, int childMeasuredState) { 18948 final int specMode = MeasureSpec.getMode(measureSpec); 18949 final int specSize = MeasureSpec.getSize(measureSpec); 18950 final int result; 18951 switch (specMode) { 18952 case MeasureSpec.AT_MOST: 18953 if (specSize < size) { 18954 result = specSize | MEASURED_STATE_TOO_SMALL; 18955 } else { 18956 result = size; 18957 } 18958 break; 18959 case MeasureSpec.EXACTLY: 18960 result = specSize; 18961 break; 18962 case MeasureSpec.UNSPECIFIED: 18963 default: 18964 result = size; 18965 } 18966 return result | (childMeasuredState & MEASURED_STATE_MASK); 18967 } 18968 18969 /** 18970 * Utility to return a default size. Uses the supplied size if the 18971 * MeasureSpec imposed no constraints. Will get larger if allowed 18972 * by the MeasureSpec. 18973 * 18974 * @param size Default size for this view 18975 * @param measureSpec Constraints imposed by the parent 18976 * @return The size this view should be. 18977 */ 18978 public static int getDefaultSize(int size, int measureSpec) { 18979 int result = size; 18980 int specMode = MeasureSpec.getMode(measureSpec); 18981 int specSize = MeasureSpec.getSize(measureSpec); 18982 18983 switch (specMode) { 18984 case MeasureSpec.UNSPECIFIED: 18985 result = size; 18986 break; 18987 case MeasureSpec.AT_MOST: 18988 case MeasureSpec.EXACTLY: 18989 result = specSize; 18990 break; 18991 } 18992 return result; 18993 } 18994 18995 /** 18996 * Returns the suggested minimum height that the view should use. This 18997 * returns the maximum of the view's minimum height 18998 * and the background's minimum height 18999 * ({@link android.graphics.drawable.Drawable#getMinimumHeight()}). 19000 * <p> 19001 * When being used in {@link #onMeasure(int, int)}, the caller should still 19002 * ensure the returned height is within the requirements of the parent. 19003 * 19004 * @return The suggested minimum height of the view. 19005 */ 19006 protected int getSuggestedMinimumHeight() { 19007 return (mBackground == null) ? mMinHeight : max(mMinHeight, mBackground.getMinimumHeight()); 19008 19009 } 19010 19011 /** 19012 * Returns the suggested minimum width that the view should use. This 19013 * returns the maximum of the view's minimum width) 19014 * and the background's minimum width 19015 * ({@link android.graphics.drawable.Drawable#getMinimumWidth()}). 19016 * <p> 19017 * When being used in {@link #onMeasure(int, int)}, the caller should still 19018 * ensure the returned width is within the requirements of the parent. 19019 * 19020 * @return The suggested minimum width of the view. 19021 */ 19022 protected int getSuggestedMinimumWidth() { 19023 return (mBackground == null) ? mMinWidth : max(mMinWidth, mBackground.getMinimumWidth()); 19024 } 19025 19026 /** 19027 * Returns the minimum height of the view. 19028 * 19029 * @return the minimum height the view will try to be. 19030 * 19031 * @see #setMinimumHeight(int) 19032 * 19033 * @attr ref android.R.styleable#View_minHeight 19034 */ 19035 public int getMinimumHeight() { 19036 return mMinHeight; 19037 } 19038 19039 /** 19040 * Sets the minimum height of the view. It is not guaranteed the view will 19041 * be able to achieve this minimum height (for example, if its parent layout 19042 * constrains it with less available height). 19043 * 19044 * @param minHeight The minimum height the view will try to be. 19045 * 19046 * @see #getMinimumHeight() 19047 * 19048 * @attr ref android.R.styleable#View_minHeight 19049 */ 19050 public void setMinimumHeight(int minHeight) { 19051 mMinHeight = minHeight; 19052 requestLayout(); 19053 } 19054 19055 /** 19056 * Returns the minimum width of the view. 19057 * 19058 * @return the minimum width the view will try to be. 19059 * 19060 * @see #setMinimumWidth(int) 19061 * 19062 * @attr ref android.R.styleable#View_minWidth 19063 */ 19064 public int getMinimumWidth() { 19065 return mMinWidth; 19066 } 19067 19068 /** 19069 * Sets the minimum width of the view. It is not guaranteed the view will 19070 * be able to achieve this minimum width (for example, if its parent layout 19071 * constrains it with less available width). 19072 * 19073 * @param minWidth The minimum width the view will try to be. 19074 * 19075 * @see #getMinimumWidth() 19076 * 19077 * @attr ref android.R.styleable#View_minWidth 19078 */ 19079 public void setMinimumWidth(int minWidth) { 19080 mMinWidth = minWidth; 19081 requestLayout(); 19082 19083 } 19084 19085 /** 19086 * Get the animation currently associated with this view. 19087 * 19088 * @return The animation that is currently playing or 19089 * scheduled to play for this view. 19090 */ 19091 public Animation getAnimation() { 19092 return mCurrentAnimation; 19093 } 19094 19095 /** 19096 * Start the specified animation now. 19097 * 19098 * @param animation the animation to start now 19099 */ 19100 public void startAnimation(Animation animation) { 19101 animation.setStartTime(Animation.START_ON_FIRST_FRAME); 19102 setAnimation(animation); 19103 invalidateParentCaches(); 19104 invalidate(true); 19105 } 19106 19107 /** 19108 * Cancels any animations for this view. 19109 */ 19110 public void clearAnimation() { 19111 if (mCurrentAnimation != null) { 19112 mCurrentAnimation.detach(); 19113 } 19114 mCurrentAnimation = null; 19115 invalidateParentIfNeeded(); 19116 } 19117 19118 /** 19119 * Sets the next animation to play for this view. 19120 * If you want the animation to play immediately, use 19121 * {@link #startAnimation(android.view.animation.Animation)} instead. 19122 * This method provides allows fine-grained 19123 * control over the start time and invalidation, but you 19124 * must make sure that 1) the animation has a start time set, and 19125 * 2) the view's parent (which controls animations on its children) 19126 * will be invalidated when the animation is supposed to 19127 * start. 19128 * 19129 * @param animation The next animation, or null. 19130 */ 19131 public void setAnimation(Animation animation) { 19132 mCurrentAnimation = animation; 19133 19134 if (animation != null) { 19135 // If the screen is off assume the animation start time is now instead of 19136 // the next frame we draw. Keeping the START_ON_FIRST_FRAME start time 19137 // would cause the animation to start when the screen turns back on 19138 if (mAttachInfo != null && mAttachInfo.mDisplayState == Display.STATE_OFF 19139 && animation.getStartTime() == Animation.START_ON_FIRST_FRAME) { 19140 animation.setStartTime(AnimationUtils.currentAnimationTimeMillis()); 19141 } 19142 animation.reset(); 19143 } 19144 } 19145 19146 /** 19147 * Invoked by a parent ViewGroup to notify the start of the animation 19148 * currently associated with this view. If you override this method, 19149 * always call super.onAnimationStart(); 19150 * 19151 * @see #setAnimation(android.view.animation.Animation) 19152 * @see #getAnimation() 19153 */ 19154 @CallSuper 19155 protected void onAnimationStart() { 19156 mPrivateFlags |= PFLAG_ANIMATION_STARTED; 19157 } 19158 19159 /** 19160 * Invoked by a parent ViewGroup to notify the end of the animation 19161 * currently associated with this view. If you override this method, 19162 * always call super.onAnimationEnd(); 19163 * 19164 * @see #setAnimation(android.view.animation.Animation) 19165 * @see #getAnimation() 19166 */ 19167 @CallSuper 19168 protected void onAnimationEnd() { 19169 mPrivateFlags &= ~PFLAG_ANIMATION_STARTED; 19170 } 19171 19172 /** 19173 * Invoked if there is a Transform that involves alpha. Subclass that can 19174 * draw themselves with the specified alpha should return true, and then 19175 * respect that alpha when their onDraw() is called. If this returns false 19176 * then the view may be redirected to draw into an offscreen buffer to 19177 * fulfill the request, which will look fine, but may be slower than if the 19178 * subclass handles it internally. The default implementation returns false. 19179 * 19180 * @param alpha The alpha (0..255) to apply to the view's drawing 19181 * @return true if the view can draw with the specified alpha. 19182 */ 19183 protected boolean onSetAlpha(int alpha) { 19184 return false; 19185 } 19186 19187 /** 19188 * This is used by the RootView to perform an optimization when 19189 * the view hierarchy contains one or several SurfaceView. 19190 * SurfaceView is always considered transparent, but its children are not, 19191 * therefore all View objects remove themselves from the global transparent 19192 * region (passed as a parameter to this function). 19193 * 19194 * @param region The transparent region for this ViewAncestor (window). 19195 * 19196 * @return Returns true if the effective visibility of the view at this 19197 * point is opaque, regardless of the transparent region; returns false 19198 * if it is possible for underlying windows to be seen behind the view. 19199 * 19200 * {@hide} 19201 */ 19202 public boolean gatherTransparentRegion(Region region) { 19203 final AttachInfo attachInfo = mAttachInfo; 19204 if (region != null && attachInfo != null) { 19205 final int pflags = mPrivateFlags; 19206 if ((pflags & PFLAG_SKIP_DRAW) == 0) { 19207 // The SKIP_DRAW flag IS NOT set, so this view draws. We need to 19208 // remove it from the transparent region. 19209 final int[] location = attachInfo.mTransparentLocation; 19210 getLocationInWindow(location); 19211 region.op(location[0], location[1], location[0] + mRight - mLeft, 19212 location[1] + mBottom - mTop, Region.Op.DIFFERENCE); 19213 } else { 19214 if (mBackground != null && mBackground.getOpacity() != PixelFormat.TRANSPARENT) { 19215 // The SKIP_DRAW flag IS set and the background drawable exists, we remove 19216 // the background drawable's non-transparent parts from this transparent region. 19217 applyDrawableToTransparentRegion(mBackground, region); 19218 } 19219 if (mForegroundInfo != null && mForegroundInfo.mDrawable != null 19220 && mForegroundInfo.mDrawable.getOpacity() != PixelFormat.TRANSPARENT) { 19221 // Similarly, we remove the foreground drawable's non-transparent parts. 19222 applyDrawableToTransparentRegion(mForegroundInfo.mDrawable, region); 19223 } 19224 } 19225 } 19226 return true; 19227 } 19228 19229 /** 19230 * Play a sound effect for this view. 19231 * 19232 * <p>The framework will play sound effects for some built in actions, such as 19233 * clicking, but you may wish to play these effects in your widget, 19234 * for instance, for internal navigation. 19235 * 19236 * <p>The sound effect will only be played if sound effects are enabled by the user, and 19237 * {@link #isSoundEffectsEnabled()} is true. 19238 * 19239 * @param soundConstant One of the constants defined in {@link SoundEffectConstants} 19240 */ 19241 public void playSoundEffect(int soundConstant) { 19242 if (mAttachInfo == null || mAttachInfo.mRootCallbacks == null || !isSoundEffectsEnabled()) { 19243 return; 19244 } 19245 mAttachInfo.mRootCallbacks.playSoundEffect(soundConstant); 19246 } 19247 19248 /** 19249 * BZZZTT!!1! 19250 * 19251 * <p>Provide haptic feedback to the user for this view. 19252 * 19253 * <p>The framework will provide haptic feedback for some built in actions, 19254 * such as long presses, but you may wish to provide feedback for your 19255 * own widget. 19256 * 19257 * <p>The feedback will only be performed if 19258 * {@link #isHapticFeedbackEnabled()} is true. 19259 * 19260 * @param feedbackConstant One of the constants defined in 19261 * {@link HapticFeedbackConstants} 19262 */ 19263 public boolean performHapticFeedback(int feedbackConstant) { 19264 return performHapticFeedback(feedbackConstant, 0); 19265 } 19266 19267 /** 19268 * BZZZTT!!1! 19269 * 19270 * <p>Like {@link #performHapticFeedback(int)}, with additional options. 19271 * 19272 * @param feedbackConstant One of the constants defined in 19273 * {@link HapticFeedbackConstants} 19274 * @param flags Additional flags as per {@link HapticFeedbackConstants}. 19275 */ 19276 public boolean performHapticFeedback(int feedbackConstant, int flags) { 19277 if (mAttachInfo == null) { 19278 return false; 19279 } 19280 //noinspection SimplifiableIfStatement 19281 if ((flags & HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING) == 0 19282 && !isHapticFeedbackEnabled()) { 19283 return false; 19284 } 19285 return mAttachInfo.mRootCallbacks.performHapticFeedback(feedbackConstant, 19286 (flags & HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING) != 0); 19287 } 19288 19289 /** 19290 * Request that the visibility of the status bar or other screen/window 19291 * decorations be changed. 19292 * 19293 * <p>This method is used to put the over device UI into temporary modes 19294 * where the user's attention is focused more on the application content, 19295 * by dimming or hiding surrounding system affordances. This is typically 19296 * used in conjunction with {@link Window#FEATURE_ACTION_BAR_OVERLAY 19297 * Window.FEATURE_ACTION_BAR_OVERLAY}, allowing the applications content 19298 * to be placed behind the action bar (and with these flags other system 19299 * affordances) so that smooth transitions between hiding and showing them 19300 * can be done. 19301 * 19302 * <p>Two representative examples of the use of system UI visibility is 19303 * implementing a content browsing application (like a magazine reader) 19304 * and a video playing application. 19305 * 19306 * <p>The first code shows a typical implementation of a View in a content 19307 * browsing application. In this implementation, the application goes 19308 * into a content-oriented mode by hiding the status bar and action bar, 19309 * and putting the navigation elements into lights out mode. The user can 19310 * then interact with content while in this mode. Such an application should 19311 * provide an easy way for the user to toggle out of the mode (such as to 19312 * check information in the status bar or access notifications). In the 19313 * implementation here, this is done simply by tapping on the content. 19314 * 19315 * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/ContentBrowserActivity.java 19316 * content} 19317 * 19318 * <p>This second code sample shows a typical implementation of a View 19319 * in a video playing application. In this situation, while the video is 19320 * playing the application would like to go into a complete full-screen mode, 19321 * to use as much of the display as possible for the video. When in this state 19322 * the user can not interact with the application; the system intercepts 19323 * touching on the screen to pop the UI out of full screen mode. See 19324 * {@link #fitSystemWindows(Rect)} for a sample layout that goes with this code. 19325 * 19326 * {@sample development/samples/ApiDemos/src/com/example/android/apis/view/VideoPlayerActivity.java 19327 * content} 19328 * 19329 * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 19330 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN}, 19331 * {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, 19332 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}, {@link #SYSTEM_UI_FLAG_IMMERSIVE}, 19333 * and {@link #SYSTEM_UI_FLAG_IMMERSIVE_STICKY}. 19334 */ 19335 public void setSystemUiVisibility(int visibility) { 19336 if (visibility != mSystemUiVisibility) { 19337 mSystemUiVisibility = visibility; 19338 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 19339 mParent.recomputeViewAttributes(this); 19340 } 19341 } 19342 } 19343 19344 /** 19345 * Returns the last {@link #setSystemUiVisibility(int)} that this view has requested. 19346 * @return Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 19347 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, {@link #SYSTEM_UI_FLAG_FULLSCREEN}, 19348 * {@link #SYSTEM_UI_FLAG_LAYOUT_STABLE}, {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, 19349 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN}, {@link #SYSTEM_UI_FLAG_IMMERSIVE}, 19350 * and {@link #SYSTEM_UI_FLAG_IMMERSIVE_STICKY}. 19351 */ 19352 public int getSystemUiVisibility() { 19353 return mSystemUiVisibility; 19354 } 19355 19356 /** 19357 * Returns the current system UI visibility that is currently set for 19358 * the entire window. This is the combination of the 19359 * {@link #setSystemUiVisibility(int)} values supplied by all of the 19360 * views in the window. 19361 */ 19362 public int getWindowSystemUiVisibility() { 19363 return mAttachInfo != null ? mAttachInfo.mSystemUiVisibility : 0; 19364 } 19365 19366 /** 19367 * Override to find out when the window's requested system UI visibility 19368 * has changed, that is the value returned by {@link #getWindowSystemUiVisibility()}. 19369 * This is different from the callbacks received through 19370 * {@link #setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener)} 19371 * in that this is only telling you about the local request of the window, 19372 * not the actual values applied by the system. 19373 */ 19374 public void onWindowSystemUiVisibilityChanged(int visible) { 19375 } 19376 19377 /** 19378 * Dispatch callbacks to {@link #onWindowSystemUiVisibilityChanged(int)} down 19379 * the view hierarchy. 19380 */ 19381 public void dispatchWindowSystemUiVisiblityChanged(int visible) { 19382 onWindowSystemUiVisibilityChanged(visible); 19383 } 19384 19385 /** 19386 * Set a listener to receive callbacks when the visibility of the system bar changes. 19387 * @param l The {@link OnSystemUiVisibilityChangeListener} to receive callbacks. 19388 */ 19389 public void setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener l) { 19390 getListenerInfo().mOnSystemUiVisibilityChangeListener = l; 19391 if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { 19392 mParent.recomputeViewAttributes(this); 19393 } 19394 } 19395 19396 /** 19397 * Dispatch callbacks to {@link #setOnSystemUiVisibilityChangeListener} down 19398 * the view hierarchy. 19399 */ 19400 public void dispatchSystemUiVisibilityChanged(int visibility) { 19401 ListenerInfo li = mListenerInfo; 19402 if (li != null && li.mOnSystemUiVisibilityChangeListener != null) { 19403 li.mOnSystemUiVisibilityChangeListener.onSystemUiVisibilityChange( 19404 visibility & PUBLIC_STATUS_BAR_VISIBILITY_MASK); 19405 } 19406 } 19407 19408 boolean updateLocalSystemUiVisibility(int localValue, int localChanges) { 19409 int val = (mSystemUiVisibility&~localChanges) | (localValue&localChanges); 19410 if (val != mSystemUiVisibility) { 19411 setSystemUiVisibility(val); 19412 return true; 19413 } 19414 return false; 19415 } 19416 19417 /** @hide */ 19418 public void setDisabledSystemUiVisibility(int flags) { 19419 if (mAttachInfo != null) { 19420 if (mAttachInfo.mDisabledSystemUiVisibility != flags) { 19421 mAttachInfo.mDisabledSystemUiVisibility = flags; 19422 if (mParent != null) { 19423 mParent.recomputeViewAttributes(this); 19424 } 19425 } 19426 } 19427 } 19428 19429 /** 19430 * Creates an image that the system displays during the drag and drop 19431 * operation. This is called a "drag shadow". The default implementation 19432 * for a DragShadowBuilder based on a View returns an image that has exactly the same 19433 * appearance as the given View. The default also positions the center of the drag shadow 19434 * directly under the touch point. If no View is provided (the constructor with no parameters 19435 * is used), and {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} and 19436 * {@link #onDrawShadow(Canvas) onDrawShadow()} are not overridden, then the 19437 * default is an invisible drag shadow. 19438 * <p> 19439 * You are not required to use the View you provide to the constructor as the basis of the 19440 * drag shadow. The {@link #onDrawShadow(Canvas) onDrawShadow()} method allows you to draw 19441 * anything you want as the drag shadow. 19442 * </p> 19443 * <p> 19444 * You pass a DragShadowBuilder object to the system when you start the drag. The system 19445 * calls {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} to get the 19446 * size and position of the drag shadow. It uses this data to construct a 19447 * {@link android.graphics.Canvas} object, then it calls {@link #onDrawShadow(Canvas) onDrawShadow()} 19448 * so that your application can draw the shadow image in the Canvas. 19449 * </p> 19450 * 19451 * <div class="special reference"> 19452 * <h3>Developer Guides</h3> 19453 * <p>For a guide to implementing drag and drop features, read the 19454 * <a href="{@docRoot}guide/topics/ui/drag-drop.html">Drag and Drop</a> developer guide.</p> 19455 * </div> 19456 */ 19457 public static class DragShadowBuilder { 19458 private final WeakReference<View> mView; 19459 19460 /** 19461 * Constructs a shadow image builder based on a View. By default, the resulting drag 19462 * shadow will have the same appearance and dimensions as the View, with the touch point 19463 * over the center of the View. 19464 * @param view A View. Any View in scope can be used. 19465 */ 19466 public DragShadowBuilder(View view) { 19467 mView = new WeakReference<View>(view); 19468 } 19469 19470 /** 19471 * Construct a shadow builder object with no associated View. This 19472 * constructor variant is only useful when the {@link #onProvideShadowMetrics(Point, Point)} 19473 * and {@link #onDrawShadow(Canvas)} methods are also overridden in order 19474 * to supply the drag shadow's dimensions and appearance without 19475 * reference to any View object. If they are not overridden, then the result is an 19476 * invisible drag shadow. 19477 */ 19478 public DragShadowBuilder() { 19479 mView = new WeakReference<View>(null); 19480 } 19481 19482 /** 19483 * Returns the View object that had been passed to the 19484 * {@link #View.DragShadowBuilder(View)} 19485 * constructor. If that View parameter was {@code null} or if the 19486 * {@link #View.DragShadowBuilder()} 19487 * constructor was used to instantiate the builder object, this method will return 19488 * null. 19489 * 19490 * @return The View object associate with this builder object. 19491 */ 19492 @SuppressWarnings({"JavadocReference"}) 19493 final public View getView() { 19494 return mView.get(); 19495 } 19496 19497 /** 19498 * Provides the metrics for the shadow image. These include the dimensions of 19499 * the shadow image, and the point within that shadow that should 19500 * be centered under the touch location while dragging. 19501 * <p> 19502 * The default implementation sets the dimensions of the shadow to be the 19503 * same as the dimensions of the View itself and centers the shadow under 19504 * the touch point. 19505 * </p> 19506 * 19507 * @param shadowSize A {@link android.graphics.Point} containing the width and height 19508 * of the shadow image. Your application must set {@link android.graphics.Point#x} to the 19509 * desired width and must set {@link android.graphics.Point#y} to the desired height of the 19510 * image. 19511 * 19512 * @param shadowTouchPoint A {@link android.graphics.Point} for the position within the 19513 * shadow image that should be underneath the touch point during the drag and drop 19514 * operation. Your application must set {@link android.graphics.Point#x} to the 19515 * X coordinate and {@link android.graphics.Point#y} to the Y coordinate of this position. 19516 */ 19517 public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) { 19518 final View view = mView.get(); 19519 if (view != null) { 19520 shadowSize.set(view.getWidth(), view.getHeight()); 19521 shadowTouchPoint.set(shadowSize.x / 2, shadowSize.y / 2); 19522 } else { 19523 Log.e(View.VIEW_LOG_TAG, "Asked for drag thumb metrics but no view"); 19524 } 19525 } 19526 19527 /** 19528 * Draws the shadow image. The system creates the {@link android.graphics.Canvas} object 19529 * based on the dimensions it received from the 19530 * {@link #onProvideShadowMetrics(Point, Point)} callback. 19531 * 19532 * @param canvas A {@link android.graphics.Canvas} object in which to draw the shadow image. 19533 */ 19534 public void onDrawShadow(Canvas canvas) { 19535 final View view = mView.get(); 19536 if (view != null) { 19537 view.draw(canvas); 19538 } else { 19539 Log.e(View.VIEW_LOG_TAG, "Asked to draw drag shadow but no view"); 19540 } 19541 } 19542 } 19543 19544 /** 19545 * Starts a drag and drop operation. When your application calls this method, it passes a 19546 * {@link android.view.View.DragShadowBuilder} object to the system. The 19547 * system calls this object's {@link DragShadowBuilder#onProvideShadowMetrics(Point, Point)} 19548 * to get metrics for the drag shadow, and then calls the object's 19549 * {@link DragShadowBuilder#onDrawShadow(Canvas)} to draw the drag shadow itself. 19550 * <p> 19551 * Once the system has the drag shadow, it begins the drag and drop operation by sending 19552 * drag events to all the View objects in your application that are currently visible. It does 19553 * this either by calling the View object's drag listener (an implementation of 19554 * {@link android.view.View.OnDragListener#onDrag(View,DragEvent) onDrag()} or by calling the 19555 * View object's {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} method. 19556 * Both are passed a {@link android.view.DragEvent} object that has a 19557 * {@link android.view.DragEvent#getAction()} value of 19558 * {@link android.view.DragEvent#ACTION_DRAG_STARTED}. 19559 * </p> 19560 * <p> 19561 * Your application can invoke startDrag() on any attached View object. The View object does not 19562 * need to be the one used in {@link android.view.View.DragShadowBuilder}, nor does it need to 19563 * be related to the View the user selected for dragging. 19564 * </p> 19565 * @param data A {@link android.content.ClipData} object pointing to the data to be 19566 * transferred by the drag and drop operation. 19567 * @param shadowBuilder A {@link android.view.View.DragShadowBuilder} object for building the 19568 * drag shadow. 19569 * @param myLocalState An {@link java.lang.Object} containing local data about the drag and 19570 * drop operation. This Object is put into every DragEvent object sent by the system during the 19571 * current drag. 19572 * <p> 19573 * myLocalState is a lightweight mechanism for the sending information from the dragged View 19574 * to the target Views. For example, it can contain flags that differentiate between a 19575 * a copy operation and a move operation. 19576 * </p> 19577 * @param flags Flags that control the drag and drop operation. No flags are currently defined, 19578 * so the parameter should be set to 0. 19579 * @return {@code true} if the method completes successfully, or 19580 * {@code false} if it fails anywhere. Returning {@code false} means the system was unable to 19581 * do a drag, and so no drag operation is in progress. 19582 */ 19583 public final boolean startDrag(ClipData data, DragShadowBuilder shadowBuilder, 19584 Object myLocalState, int flags) { 19585 if (ViewDebug.DEBUG_DRAG) { 19586 Log.d(VIEW_LOG_TAG, "startDrag: data=" + data + " flags=" + flags); 19587 } 19588 boolean okay = false; 19589 19590 Point shadowSize = new Point(); 19591 Point shadowTouchPoint = new Point(); 19592 shadowBuilder.onProvideShadowMetrics(shadowSize, shadowTouchPoint); 19593 19594 if ((shadowSize.x < 0) || (shadowSize.y < 0) || 19595 (shadowTouchPoint.x < 0) || (shadowTouchPoint.y < 0)) { 19596 throw new IllegalStateException("Drag shadow dimensions must not be negative"); 19597 } 19598 19599 if (ViewDebug.DEBUG_DRAG) { 19600 Log.d(VIEW_LOG_TAG, "drag shadow: width=" + shadowSize.x + " height=" + shadowSize.y 19601 + " shadowX=" + shadowTouchPoint.x + " shadowY=" + shadowTouchPoint.y); 19602 } 19603 Surface surface = new Surface(); 19604 try { 19605 IBinder token = mAttachInfo.mSession.prepareDrag(mAttachInfo.mWindow, 19606 flags, shadowSize.x, shadowSize.y, surface); 19607 if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "prepareDrag returned token=" + token 19608 + " surface=" + surface); 19609 if (token != null) { 19610 Canvas canvas = surface.lockCanvas(null); 19611 try { 19612 canvas.drawColor(0, PorterDuff.Mode.CLEAR); 19613 shadowBuilder.onDrawShadow(canvas); 19614 } finally { 19615 surface.unlockCanvasAndPost(canvas); 19616 } 19617 19618 final ViewRootImpl root = getViewRootImpl(); 19619 19620 // Cache the local state object for delivery with DragEvents 19621 root.setLocalDragState(myLocalState); 19622 19623 // repurpose 'shadowSize' for the last touch point 19624 root.getLastTouchPoint(shadowSize); 19625 19626 okay = mAttachInfo.mSession.performDrag(mAttachInfo.mWindow, token, 19627 shadowSize.x, shadowSize.y, 19628 shadowTouchPoint.x, shadowTouchPoint.y, data); 19629 if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "performDrag returned " + okay); 19630 19631 // Off and running! Release our local surface instance; the drag 19632 // shadow surface is now managed by the system process. 19633 surface.release(); 19634 } 19635 } catch (Exception e) { 19636 Log.e(VIEW_LOG_TAG, "Unable to initiate drag", e); 19637 surface.destroy(); 19638 } 19639 19640 return okay; 19641 } 19642 19643 /** 19644 * Handles drag events sent by the system following a call to 19645 * {@link android.view.View#startDrag(ClipData,DragShadowBuilder,Object,int) startDrag()}. 19646 *<p> 19647 * When the system calls this method, it passes a 19648 * {@link android.view.DragEvent} object. A call to 19649 * {@link android.view.DragEvent#getAction()} returns one of the action type constants defined 19650 * in DragEvent. The method uses these to determine what is happening in the drag and drop 19651 * operation. 19652 * @param event The {@link android.view.DragEvent} sent by the system. 19653 * The {@link android.view.DragEvent#getAction()} method returns an action type constant defined 19654 * in DragEvent, indicating the type of drag event represented by this object. 19655 * @return {@code true} if the method was successful, otherwise {@code false}. 19656 * <p> 19657 * The method should return {@code true} in response to an action type of 19658 * {@link android.view.DragEvent#ACTION_DRAG_STARTED} to receive drag events for the current 19659 * operation. 19660 * </p> 19661 * <p> 19662 * The method should also return {@code true} in response to an action type of 19663 * {@link android.view.DragEvent#ACTION_DROP} if it consumed the drop, or 19664 * {@code false} if it didn't. 19665 * </p> 19666 */ 19667 public boolean onDragEvent(DragEvent event) { 19668 return false; 19669 } 19670 19671 /** 19672 * Detects if this View is enabled and has a drag event listener. 19673 * If both are true, then it calls the drag event listener with the 19674 * {@link android.view.DragEvent} it received. If the drag event listener returns 19675 * {@code true}, then dispatchDragEvent() returns {@code true}. 19676 * <p> 19677 * For all other cases, the method calls the 19678 * {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} drag event handler 19679 * method and returns its result. 19680 * </p> 19681 * <p> 19682 * This ensures that a drag event is always consumed, even if the View does not have a drag 19683 * event listener. However, if the View has a listener and the listener returns true, then 19684 * onDragEvent() is not called. 19685 * </p> 19686 */ 19687 public boolean dispatchDragEvent(DragEvent event) { 19688 ListenerInfo li = mListenerInfo; 19689 //noinspection SimplifiableIfStatement 19690 if (li != null && li.mOnDragListener != null && (mViewFlags & ENABLED_MASK) == ENABLED 19691 && li.mOnDragListener.onDrag(this, event)) { 19692 return true; 19693 } 19694 return onDragEvent(event); 19695 } 19696 19697 boolean canAcceptDrag() { 19698 return (mPrivateFlags2 & PFLAG2_DRAG_CAN_ACCEPT) != 0; 19699 } 19700 19701 /** 19702 * This needs to be a better API (NOT ON VIEW) before it is exposed. If 19703 * it is ever exposed at all. 19704 * @hide 19705 */ 19706 public void onCloseSystemDialogs(String reason) { 19707 } 19708 19709 /** 19710 * Given a Drawable whose bounds have been set to draw into this view, 19711 * update a Region being computed for 19712 * {@link #gatherTransparentRegion(android.graphics.Region)} so 19713 * that any non-transparent parts of the Drawable are removed from the 19714 * given transparent region. 19715 * 19716 * @param dr The Drawable whose transparency is to be applied to the region. 19717 * @param region A Region holding the current transparency information, 19718 * where any parts of the region that are set are considered to be 19719 * transparent. On return, this region will be modified to have the 19720 * transparency information reduced by the corresponding parts of the 19721 * Drawable that are not transparent. 19722 * {@hide} 19723 */ 19724 public void applyDrawableToTransparentRegion(Drawable dr, Region region) { 19725 if (DBG) { 19726 Log.i("View", "Getting transparent region for: " + this); 19727 } 19728 final Region r = dr.getTransparentRegion(); 19729 final Rect db = dr.getBounds(); 19730 final AttachInfo attachInfo = mAttachInfo; 19731 if (r != null && attachInfo != null) { 19732 final int w = getRight()-getLeft(); 19733 final int h = getBottom()-getTop(); 19734 if (db.left > 0) { 19735 //Log.i("VIEW", "Drawable left " + db.left + " > view 0"); 19736 r.op(0, 0, db.left, h, Region.Op.UNION); 19737 } 19738 if (db.right < w) { 19739 //Log.i("VIEW", "Drawable right " + db.right + " < view " + w); 19740 r.op(db.right, 0, w, h, Region.Op.UNION); 19741 } 19742 if (db.top > 0) { 19743 //Log.i("VIEW", "Drawable top " + db.top + " > view 0"); 19744 r.op(0, 0, w, db.top, Region.Op.UNION); 19745 } 19746 if (db.bottom < h) { 19747 //Log.i("VIEW", "Drawable bottom " + db.bottom + " < view " + h); 19748 r.op(0, db.bottom, w, h, Region.Op.UNION); 19749 } 19750 final int[] location = attachInfo.mTransparentLocation; 19751 getLocationInWindow(location); 19752 r.translate(location[0], location[1]); 19753 region.op(r, Region.Op.INTERSECT); 19754 } else { 19755 region.op(db, Region.Op.DIFFERENCE); 19756 } 19757 } 19758 19759 private void checkForLongClick(int delayOffset) { 19760 if ((mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) { 19761 mHasPerformedLongPress = false; 19762 19763 if (mPendingCheckForLongPress == null) { 19764 mPendingCheckForLongPress = new CheckForLongPress(); 19765 } 19766 mPendingCheckForLongPress.rememberWindowAttachCount(); 19767 postDelayed(mPendingCheckForLongPress, 19768 ViewConfiguration.getLongPressTimeout() - delayOffset); 19769 } 19770 } 19771 19772 /** 19773 * Inflate a view from an XML resource. This convenience method wraps the {@link 19774 * LayoutInflater} class, which provides a full range of options for view inflation. 19775 * 19776 * @param context The Context object for your activity or application. 19777 * @param resource The resource ID to inflate 19778 * @param root A view group that will be the parent. Used to properly inflate the 19779 * layout_* parameters. 19780 * @see LayoutInflater 19781 */ 19782 public static View inflate(Context context, @LayoutRes int resource, ViewGroup root) { 19783 LayoutInflater factory = LayoutInflater.from(context); 19784 return factory.inflate(resource, root); 19785 } 19786 19787 /** 19788 * Scroll the view with standard behavior for scrolling beyond the normal 19789 * content boundaries. Views that call this method should override 19790 * {@link #onOverScrolled(int, int, boolean, boolean)} to respond to the 19791 * results of an over-scroll operation. 19792 * 19793 * Views can use this method to handle any touch or fling-based scrolling. 19794 * 19795 * @param deltaX Change in X in pixels 19796 * @param deltaY Change in Y in pixels 19797 * @param scrollX Current X scroll value in pixels before applying deltaX 19798 * @param scrollY Current Y scroll value in pixels before applying deltaY 19799 * @param scrollRangeX Maximum content scroll range along the X axis 19800 * @param scrollRangeY Maximum content scroll range along the Y axis 19801 * @param maxOverScrollX Number of pixels to overscroll by in either direction 19802 * along the X axis. 19803 * @param maxOverScrollY Number of pixels to overscroll by in either direction 19804 * along the Y axis. 19805 * @param isTouchEvent true if this scroll operation is the result of a touch event. 19806 * @return true if scrolling was clamped to an over-scroll boundary along either 19807 * axis, false otherwise. 19808 */ 19809 @SuppressWarnings({"UnusedParameters"}) 19810 protected boolean overScrollBy(int deltaX, int deltaY, 19811 int scrollX, int scrollY, 19812 int scrollRangeX, int scrollRangeY, 19813 int maxOverScrollX, int maxOverScrollY, 19814 boolean isTouchEvent) { 19815 final int overScrollMode = mOverScrollMode; 19816 final boolean canScrollHorizontal = 19817 computeHorizontalScrollRange() > computeHorizontalScrollExtent(); 19818 final boolean canScrollVertical = 19819 computeVerticalScrollRange() > computeVerticalScrollExtent(); 19820 final boolean overScrollHorizontal = overScrollMode == OVER_SCROLL_ALWAYS || 19821 (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollHorizontal); 19822 final boolean overScrollVertical = overScrollMode == OVER_SCROLL_ALWAYS || 19823 (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollVertical); 19824 19825 int newScrollX = scrollX + deltaX; 19826 if (!overScrollHorizontal) { 19827 maxOverScrollX = 0; 19828 } 19829 19830 int newScrollY = scrollY + deltaY; 19831 if (!overScrollVertical) { 19832 maxOverScrollY = 0; 19833 } 19834 19835 // Clamp values if at the limits and record 19836 final int left = -maxOverScrollX; 19837 final int right = maxOverScrollX + scrollRangeX; 19838 final int top = -maxOverScrollY; 19839 final int bottom = maxOverScrollY + scrollRangeY; 19840 19841 boolean clampedX = false; 19842 if (newScrollX > right) { 19843 newScrollX = right; 19844 clampedX = true; 19845 } else if (newScrollX < left) { 19846 newScrollX = left; 19847 clampedX = true; 19848 } 19849 19850 boolean clampedY = false; 19851 if (newScrollY > bottom) { 19852 newScrollY = bottom; 19853 clampedY = true; 19854 } else if (newScrollY < top) { 19855 newScrollY = top; 19856 clampedY = true; 19857 } 19858 19859 onOverScrolled(newScrollX, newScrollY, clampedX, clampedY); 19860 19861 return clampedX || clampedY; 19862 } 19863 19864 /** 19865 * Called by {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)} to 19866 * respond to the results of an over-scroll operation. 19867 * 19868 * @param scrollX New X scroll value in pixels 19869 * @param scrollY New Y scroll value in pixels 19870 * @param clampedX True if scrollX was clamped to an over-scroll boundary 19871 * @param clampedY True if scrollY was clamped to an over-scroll boundary 19872 */ 19873 protected void onOverScrolled(int scrollX, int scrollY, 19874 boolean clampedX, boolean clampedY) { 19875 // Intentionally empty. 19876 } 19877 19878 /** 19879 * Returns the over-scroll mode for this view. The result will be 19880 * one of {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} 19881 * (allow over-scrolling only if the view content is larger than the container), 19882 * or {@link #OVER_SCROLL_NEVER}. 19883 * 19884 * @return This view's over-scroll mode. 19885 */ 19886 public int getOverScrollMode() { 19887 return mOverScrollMode; 19888 } 19889 19890 /** 19891 * Set the over-scroll mode for this view. Valid over-scroll modes are 19892 * {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} 19893 * (allow over-scrolling only if the view content is larger than the container), 19894 * or {@link #OVER_SCROLL_NEVER}. 19895 * 19896 * Setting the over-scroll mode of a view will have an effect only if the 19897 * view is capable of scrolling. 19898 * 19899 * @param overScrollMode The new over-scroll mode for this view. 19900 */ 19901 public void setOverScrollMode(int overScrollMode) { 19902 if (overScrollMode != OVER_SCROLL_ALWAYS && 19903 overScrollMode != OVER_SCROLL_IF_CONTENT_SCROLLS && 19904 overScrollMode != OVER_SCROLL_NEVER) { 19905 throw new IllegalArgumentException("Invalid overscroll mode " + overScrollMode); 19906 } 19907 mOverScrollMode = overScrollMode; 19908 } 19909 19910 /** 19911 * Enable or disable nested scrolling for this view. 19912 * 19913 * <p>If this property is set to true the view will be permitted to initiate nested 19914 * scrolling operations with a compatible parent view in the current hierarchy. If this 19915 * view does not implement nested scrolling this will have no effect. Disabling nested scrolling 19916 * while a nested scroll is in progress has the effect of {@link #stopNestedScroll() stopping} 19917 * the nested scroll.</p> 19918 * 19919 * @param enabled true to enable nested scrolling, false to disable 19920 * 19921 * @see #isNestedScrollingEnabled() 19922 */ 19923 public void setNestedScrollingEnabled(boolean enabled) { 19924 if (enabled) { 19925 mPrivateFlags3 |= PFLAG3_NESTED_SCROLLING_ENABLED; 19926 } else { 19927 stopNestedScroll(); 19928 mPrivateFlags3 &= ~PFLAG3_NESTED_SCROLLING_ENABLED; 19929 } 19930 } 19931 19932 /** 19933 * Returns true if nested scrolling is enabled for this view. 19934 * 19935 * <p>If nested scrolling is enabled and this View class implementation supports it, 19936 * this view will act as a nested scrolling child view when applicable, forwarding data 19937 * about the scroll operation in progress to a compatible and cooperating nested scrolling 19938 * parent.</p> 19939 * 19940 * @return true if nested scrolling is enabled 19941 * 19942 * @see #setNestedScrollingEnabled(boolean) 19943 */ 19944 public boolean isNestedScrollingEnabled() { 19945 return (mPrivateFlags3 & PFLAG3_NESTED_SCROLLING_ENABLED) == 19946 PFLAG3_NESTED_SCROLLING_ENABLED; 19947 } 19948 19949 /** 19950 * Begin a nestable scroll operation along the given axes. 19951 * 19952 * <p>A view starting a nested scroll promises to abide by the following contract:</p> 19953 * 19954 * <p>The view will call startNestedScroll upon initiating a scroll operation. In the case 19955 * of a touch scroll this corresponds to the initial {@link MotionEvent#ACTION_DOWN}. 19956 * In the case of touch scrolling the nested scroll will be terminated automatically in 19957 * the same manner as {@link ViewParent#requestDisallowInterceptTouchEvent(boolean)}. 19958 * In the event of programmatic scrolling the caller must explicitly call 19959 * {@link #stopNestedScroll()} to indicate the end of the nested scroll.</p> 19960 * 19961 * <p>If <code>startNestedScroll</code> returns true, a cooperative parent was found. 19962 * If it returns false the caller may ignore the rest of this contract until the next scroll. 19963 * Calling startNestedScroll while a nested scroll is already in progress will return true.</p> 19964 * 19965 * <p>At each incremental step of the scroll the caller should invoke 19966 * {@link #dispatchNestedPreScroll(int, int, int[], int[]) dispatchNestedPreScroll} 19967 * once it has calculated the requested scrolling delta. If it returns true the nested scrolling 19968 * parent at least partially consumed the scroll and the caller should adjust the amount it 19969 * scrolls by.</p> 19970 * 19971 * <p>After applying the remainder of the scroll delta the caller should invoke 19972 * {@link #dispatchNestedScroll(int, int, int, int, int[]) dispatchNestedScroll}, passing 19973 * both the delta consumed and the delta unconsumed. A nested scrolling parent may treat 19974 * these values differently. See {@link ViewParent#onNestedScroll(View, int, int, int, int)}. 19975 * </p> 19976 * 19977 * @param axes Flags consisting of a combination of {@link #SCROLL_AXIS_HORIZONTAL} and/or 19978 * {@link #SCROLL_AXIS_VERTICAL}. 19979 * @return true if a cooperative parent was found and nested scrolling has been enabled for 19980 * the current gesture. 19981 * 19982 * @see #stopNestedScroll() 19983 * @see #dispatchNestedPreScroll(int, int, int[], int[]) 19984 * @see #dispatchNestedScroll(int, int, int, int, int[]) 19985 */ 19986 public boolean startNestedScroll(int axes) { 19987 if (hasNestedScrollingParent()) { 19988 // Already in progress 19989 return true; 19990 } 19991 if (isNestedScrollingEnabled()) { 19992 ViewParent p = getParent(); 19993 View child = this; 19994 while (p != null) { 19995 try { 19996 if (p.onStartNestedScroll(child, this, axes)) { 19997 mNestedScrollingParent = p; 19998 p.onNestedScrollAccepted(child, this, axes); 19999 return true; 20000 } 20001 } catch (AbstractMethodError e) { 20002 Log.e(VIEW_LOG_TAG, "ViewParent " + p + " does not implement interface " + 20003 "method onStartNestedScroll", e); 20004 // Allow the search upward to continue 20005 } 20006 if (p instanceof View) { 20007 child = (View) p; 20008 } 20009 p = p.getParent(); 20010 } 20011 } 20012 return false; 20013 } 20014 20015 /** 20016 * Stop a nested scroll in progress. 20017 * 20018 * <p>Calling this method when a nested scroll is not currently in progress is harmless.</p> 20019 * 20020 * @see #startNestedScroll(int) 20021 */ 20022 public void stopNestedScroll() { 20023 if (mNestedScrollingParent != null) { 20024 mNestedScrollingParent.onStopNestedScroll(this); 20025 mNestedScrollingParent = null; 20026 } 20027 } 20028 20029 /** 20030 * Returns true if this view has a nested scrolling parent. 20031 * 20032 * <p>The presence of a nested scrolling parent indicates that this view has initiated 20033 * a nested scroll and it was accepted by an ancestor view further up the view hierarchy.</p> 20034 * 20035 * @return whether this view has a nested scrolling parent 20036 */ 20037 public boolean hasNestedScrollingParent() { 20038 return mNestedScrollingParent != null; 20039 } 20040 20041 /** 20042 * Dispatch one step of a nested scroll in progress. 20043 * 20044 * <p>Implementations of views that support nested scrolling should call this to report 20045 * info about a scroll in progress to the current nested scrolling parent. If a nested scroll 20046 * is not currently in progress or nested scrolling is not 20047 * {@link #isNestedScrollingEnabled() enabled} for this view this method does nothing.</p> 20048 * 20049 * <p>Compatible View implementations should also call 20050 * {@link #dispatchNestedPreScroll(int, int, int[], int[]) dispatchNestedPreScroll} before 20051 * consuming a component of the scroll event themselves.</p> 20052 * 20053 * @param dxConsumed Horizontal distance in pixels consumed by this view during this scroll step 20054 * @param dyConsumed Vertical distance in pixels consumed by this view during this scroll step 20055 * @param dxUnconsumed Horizontal scroll distance in pixels not consumed by this view 20056 * @param dyUnconsumed Horizontal scroll distance in pixels not consumed by this view 20057 * @param offsetInWindow Optional. If not null, on return this will contain the offset 20058 * in local view coordinates of this view from before this operation 20059 * to after it completes. View implementations may use this to adjust 20060 * expected input coordinate tracking. 20061 * @return true if the event was dispatched, false if it could not be dispatched. 20062 * @see #dispatchNestedPreScroll(int, int, int[], int[]) 20063 */ 20064 public boolean dispatchNestedScroll(int dxConsumed, int dyConsumed, 20065 int dxUnconsumed, int dyUnconsumed, @Nullable @Size(2) int[] offsetInWindow) { 20066 if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { 20067 if (dxConsumed != 0 || dyConsumed != 0 || dxUnconsumed != 0 || dyUnconsumed != 0) { 20068 int startX = 0; 20069 int startY = 0; 20070 if (offsetInWindow != null) { 20071 getLocationInWindow(offsetInWindow); 20072 startX = offsetInWindow[0]; 20073 startY = offsetInWindow[1]; 20074 } 20075 20076 mNestedScrollingParent.onNestedScroll(this, dxConsumed, dyConsumed, 20077 dxUnconsumed, dyUnconsumed); 20078 20079 if (offsetInWindow != null) { 20080 getLocationInWindow(offsetInWindow); 20081 offsetInWindow[0] -= startX; 20082 offsetInWindow[1] -= startY; 20083 } 20084 return true; 20085 } else if (offsetInWindow != null) { 20086 // No motion, no dispatch. Keep offsetInWindow up to date. 20087 offsetInWindow[0] = 0; 20088 offsetInWindow[1] = 0; 20089 } 20090 } 20091 return false; 20092 } 20093 20094 /** 20095 * Dispatch one step of a nested scroll in progress before this view consumes any portion of it. 20096 * 20097 * <p>Nested pre-scroll events are to nested scroll events what touch intercept is to touch. 20098 * <code>dispatchNestedPreScroll</code> offers an opportunity for the parent view in a nested 20099 * scrolling operation to consume some or all of the scroll operation before the child view 20100 * consumes it.</p> 20101 * 20102 * @param dx Horizontal scroll distance in pixels 20103 * @param dy Vertical scroll distance in pixels 20104 * @param consumed Output. If not null, consumed[0] will contain the consumed component of dx 20105 * and consumed[1] the consumed dy. 20106 * @param offsetInWindow Optional. If not null, on return this will contain the offset 20107 * in local view coordinates of this view from before this operation 20108 * to after it completes. View implementations may use this to adjust 20109 * expected input coordinate tracking. 20110 * @return true if the parent consumed some or all of the scroll delta 20111 * @see #dispatchNestedScroll(int, int, int, int, int[]) 20112 */ 20113 public boolean dispatchNestedPreScroll(int dx, int dy, 20114 @Nullable @Size(2) int[] consumed, @Nullable @Size(2) int[] offsetInWindow) { 20115 if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { 20116 if (dx != 0 || dy != 0) { 20117 int startX = 0; 20118 int startY = 0; 20119 if (offsetInWindow != null) { 20120 getLocationInWindow(offsetInWindow); 20121 startX = offsetInWindow[0]; 20122 startY = offsetInWindow[1]; 20123 } 20124 20125 if (consumed == null) { 20126 if (mTempNestedScrollConsumed == null) { 20127 mTempNestedScrollConsumed = new int[2]; 20128 } 20129 consumed = mTempNestedScrollConsumed; 20130 } 20131 consumed[0] = 0; 20132 consumed[1] = 0; 20133 mNestedScrollingParent.onNestedPreScroll(this, dx, dy, consumed); 20134 20135 if (offsetInWindow != null) { 20136 getLocationInWindow(offsetInWindow); 20137 offsetInWindow[0] -= startX; 20138 offsetInWindow[1] -= startY; 20139 } 20140 return consumed[0] != 0 || consumed[1] != 0; 20141 } else if (offsetInWindow != null) { 20142 offsetInWindow[0] = 0; 20143 offsetInWindow[1] = 0; 20144 } 20145 } 20146 return false; 20147 } 20148 20149 /** 20150 * Dispatch a fling to a nested scrolling parent. 20151 * 20152 * <p>This method should be used to indicate that a nested scrolling child has detected 20153 * suitable conditions for a fling. Generally this means that a touch scroll has ended with a 20154 * {@link VelocityTracker velocity} in the direction of scrolling that meets or exceeds 20155 * the {@link ViewConfiguration#getScaledMinimumFlingVelocity() minimum fling velocity} 20156 * along a scrollable axis.</p> 20157 * 20158 * <p>If a nested scrolling child view would normally fling but it is at the edge of 20159 * its own content, it can use this method to delegate the fling to its nested scrolling 20160 * parent instead. The parent may optionally consume the fling or observe a child fling.</p> 20161 * 20162 * @param velocityX Horizontal fling velocity in pixels per second 20163 * @param velocityY Vertical fling velocity in pixels per second 20164 * @param consumed true if the child consumed the fling, false otherwise 20165 * @return true if the nested scrolling parent consumed or otherwise reacted to the fling 20166 */ 20167 public boolean dispatchNestedFling(float velocityX, float velocityY, boolean consumed) { 20168 if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { 20169 return mNestedScrollingParent.onNestedFling(this, velocityX, velocityY, consumed); 20170 } 20171 return false; 20172 } 20173 20174 /** 20175 * Dispatch a fling to a nested scrolling parent before it is processed by this view. 20176 * 20177 * <p>Nested pre-fling events are to nested fling events what touch intercept is to touch 20178 * and what nested pre-scroll is to nested scroll. <code>dispatchNestedPreFling</code> 20179 * offsets an opportunity for the parent view in a nested fling to fully consume the fling 20180 * before the child view consumes it. If this method returns <code>true</code>, a nested 20181 * parent view consumed the fling and this view should not scroll as a result.</p> 20182 * 20183 * <p>For a better user experience, only one view in a nested scrolling chain should consume 20184 * the fling at a time. If a parent view consumed the fling this method will return false. 20185 * Custom view implementations should account for this in two ways:</p> 20186 * 20187 * <ul> 20188 * <li>If a custom view is paged and needs to settle to a fixed page-point, do not 20189 * call <code>dispatchNestedPreFling</code>; consume the fling and settle to a valid 20190 * position regardless.</li> 20191 * <li>If a nested parent does consume the fling, this view should not scroll at all, 20192 * even to settle back to a valid idle position.</li> 20193 * </ul> 20194 * 20195 * <p>Views should also not offer fling velocities to nested parent views along an axis 20196 * where scrolling is not currently supported; a {@link android.widget.ScrollView ScrollView} 20197 * should not offer a horizontal fling velocity to its parents since scrolling along that 20198 * axis is not permitted and carrying velocity along that motion does not make sense.</p> 20199 * 20200 * @param velocityX Horizontal fling velocity in pixels per second 20201 * @param velocityY Vertical fling velocity in pixels per second 20202 * @return true if a nested scrolling parent consumed the fling 20203 */ 20204 public boolean dispatchNestedPreFling(float velocityX, float velocityY) { 20205 if (isNestedScrollingEnabled() && mNestedScrollingParent != null) { 20206 return mNestedScrollingParent.onNestedPreFling(this, velocityX, velocityY); 20207 } 20208 return false; 20209 } 20210 20211 /** 20212 * Gets a scale factor that determines the distance the view should scroll 20213 * vertically in response to {@link MotionEvent#ACTION_SCROLL}. 20214 * @return The vertical scroll scale factor. 20215 * @hide 20216 */ 20217 protected float getVerticalScrollFactor() { 20218 if (mVerticalScrollFactor == 0) { 20219 TypedValue outValue = new TypedValue(); 20220 if (!mContext.getTheme().resolveAttribute( 20221 com.android.internal.R.attr.listPreferredItemHeight, outValue, true)) { 20222 throw new IllegalStateException( 20223 "Expected theme to define listPreferredItemHeight."); 20224 } 20225 mVerticalScrollFactor = outValue.getDimension( 20226 mContext.getResources().getDisplayMetrics()); 20227 } 20228 return mVerticalScrollFactor; 20229 } 20230 20231 /** 20232 * Gets a scale factor that determines the distance the view should scroll 20233 * horizontally in response to {@link MotionEvent#ACTION_SCROLL}. 20234 * @return The horizontal scroll scale factor. 20235 * @hide 20236 */ 20237 protected float getHorizontalScrollFactor() { 20238 // TODO: Should use something else. 20239 return getVerticalScrollFactor(); 20240 } 20241 20242 /** 20243 * Return the value specifying the text direction or policy that was set with 20244 * {@link #setTextDirection(int)}. 20245 * 20246 * @return the defined text direction. It can be one of: 20247 * 20248 * {@link #TEXT_DIRECTION_INHERIT}, 20249 * {@link #TEXT_DIRECTION_FIRST_STRONG}, 20250 * {@link #TEXT_DIRECTION_ANY_RTL}, 20251 * {@link #TEXT_DIRECTION_LTR}, 20252 * {@link #TEXT_DIRECTION_RTL}, 20253 * {@link #TEXT_DIRECTION_LOCALE}, 20254 * {@link #TEXT_DIRECTION_FIRST_STRONG_LTR}, 20255 * {@link #TEXT_DIRECTION_FIRST_STRONG_RTL} 20256 * 20257 * @attr ref android.R.styleable#View_textDirection 20258 * 20259 * @hide 20260 */ 20261 @ViewDebug.ExportedProperty(category = "text", mapping = { 20262 @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), 20263 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), 20264 @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), 20265 @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), 20266 @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), 20267 @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE"), 20268 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG_LTR, to = "FIRST_STRONG_LTR"), 20269 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG_RTL, to = "FIRST_STRONG_RTL") 20270 }) 20271 public int getRawTextDirection() { 20272 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_MASK) >> PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 20273 } 20274 20275 /** 20276 * Set the text direction. 20277 * 20278 * @param textDirection the direction to set. Should be one of: 20279 * 20280 * {@link #TEXT_DIRECTION_INHERIT}, 20281 * {@link #TEXT_DIRECTION_FIRST_STRONG}, 20282 * {@link #TEXT_DIRECTION_ANY_RTL}, 20283 * {@link #TEXT_DIRECTION_LTR}, 20284 * {@link #TEXT_DIRECTION_RTL}, 20285 * {@link #TEXT_DIRECTION_LOCALE} 20286 * {@link #TEXT_DIRECTION_FIRST_STRONG_LTR}, 20287 * {@link #TEXT_DIRECTION_FIRST_STRONG_RTL}, 20288 * 20289 * Resolution will be done if the value is set to TEXT_DIRECTION_INHERIT. The resolution 20290 * proceeds up the parent chain of the view to get the value. If there is no parent, then it will 20291 * return the default {@link #TEXT_DIRECTION_FIRST_STRONG}. 20292 * 20293 * @attr ref android.R.styleable#View_textDirection 20294 */ 20295 public void setTextDirection(int textDirection) { 20296 if (getRawTextDirection() != textDirection) { 20297 // Reset the current text direction and the resolved one 20298 mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; 20299 resetResolvedTextDirection(); 20300 // Set the new text direction 20301 mPrivateFlags2 |= ((textDirection << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) & PFLAG2_TEXT_DIRECTION_MASK); 20302 // Do resolution 20303 resolveTextDirection(); 20304 // Notify change 20305 onRtlPropertiesChanged(getLayoutDirection()); 20306 // Refresh 20307 requestLayout(); 20308 invalidate(true); 20309 } 20310 } 20311 20312 /** 20313 * Return the resolved text direction. 20314 * 20315 * @return the resolved text direction. Returns one of: 20316 * 20317 * {@link #TEXT_DIRECTION_FIRST_STRONG}, 20318 * {@link #TEXT_DIRECTION_ANY_RTL}, 20319 * {@link #TEXT_DIRECTION_LTR}, 20320 * {@link #TEXT_DIRECTION_RTL}, 20321 * {@link #TEXT_DIRECTION_LOCALE}, 20322 * {@link #TEXT_DIRECTION_FIRST_STRONG_LTR}, 20323 * {@link #TEXT_DIRECTION_FIRST_STRONG_RTL} 20324 * 20325 * @attr ref android.R.styleable#View_textDirection 20326 */ 20327 @ViewDebug.ExportedProperty(category = "text", mapping = { 20328 @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), 20329 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), 20330 @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), 20331 @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), 20332 @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL"), 20333 @ViewDebug.IntToString(from = TEXT_DIRECTION_LOCALE, to = "LOCALE"), 20334 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG_LTR, to = "FIRST_STRONG_LTR"), 20335 @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG_RTL, to = "FIRST_STRONG_RTL") 20336 }) 20337 public int getTextDirection() { 20338 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_RESOLVED_MASK) >> PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 20339 } 20340 20341 /** 20342 * Resolve the text direction. 20343 * 20344 * @return true if resolution has been done, false otherwise. 20345 * 20346 * @hide 20347 */ 20348 public boolean resolveTextDirection() { 20349 // Reset any previous text direction resolution 20350 mPrivateFlags2 &= ~(PFLAG2_TEXT_DIRECTION_RESOLVED | PFLAG2_TEXT_DIRECTION_RESOLVED_MASK); 20351 20352 if (hasRtlSupport()) { 20353 // Set resolved text direction flag depending on text direction flag 20354 final int textDirection = getRawTextDirection(); 20355 switch(textDirection) { 20356 case TEXT_DIRECTION_INHERIT: 20357 if (!canResolveTextDirection()) { 20358 // We cannot do the resolution if there is no parent, so use the default one 20359 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20360 // Resolution will need to happen again later 20361 return false; 20362 } 20363 20364 // Parent has not yet resolved, so we still return the default 20365 try { 20366 if (!mParent.isTextDirectionResolved()) { 20367 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20368 // Resolution will need to happen again later 20369 return false; 20370 } 20371 } catch (AbstractMethodError e) { 20372 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 20373 " does not fully implement ViewParent", e); 20374 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED | 20375 PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20376 return true; 20377 } 20378 20379 // Set current resolved direction to the same value as the parent's one 20380 int parentResolvedDirection; 20381 try { 20382 parentResolvedDirection = mParent.getTextDirection(); 20383 } catch (AbstractMethodError e) { 20384 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 20385 " does not fully implement ViewParent", e); 20386 parentResolvedDirection = TEXT_DIRECTION_LTR; 20387 } 20388 switch (parentResolvedDirection) { 20389 case TEXT_DIRECTION_FIRST_STRONG: 20390 case TEXT_DIRECTION_ANY_RTL: 20391 case TEXT_DIRECTION_LTR: 20392 case TEXT_DIRECTION_RTL: 20393 case TEXT_DIRECTION_LOCALE: 20394 case TEXT_DIRECTION_FIRST_STRONG_LTR: 20395 case TEXT_DIRECTION_FIRST_STRONG_RTL: 20396 mPrivateFlags2 |= 20397 (parentResolvedDirection << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT); 20398 break; 20399 default: 20400 // Default resolved direction is "first strong" heuristic 20401 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20402 } 20403 break; 20404 case TEXT_DIRECTION_FIRST_STRONG: 20405 case TEXT_DIRECTION_ANY_RTL: 20406 case TEXT_DIRECTION_LTR: 20407 case TEXT_DIRECTION_RTL: 20408 case TEXT_DIRECTION_LOCALE: 20409 case TEXT_DIRECTION_FIRST_STRONG_LTR: 20410 case TEXT_DIRECTION_FIRST_STRONG_RTL: 20411 // Resolved direction is the same as text direction 20412 mPrivateFlags2 |= (textDirection << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT); 20413 break; 20414 default: 20415 // Default resolved direction is "first strong" heuristic 20416 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20417 } 20418 } else { 20419 // Default resolved direction is "first strong" heuristic 20420 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20421 } 20422 20423 // Set to resolved 20424 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED; 20425 return true; 20426 } 20427 20428 /** 20429 * Check if text direction resolution can be done. 20430 * 20431 * @return true if text direction resolution can be done otherwise return false. 20432 */ 20433 public boolean canResolveTextDirection() { 20434 switch (getRawTextDirection()) { 20435 case TEXT_DIRECTION_INHERIT: 20436 if (mParent != null) { 20437 try { 20438 return mParent.canResolveTextDirection(); 20439 } catch (AbstractMethodError e) { 20440 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 20441 " does not fully implement ViewParent", e); 20442 } 20443 } 20444 return false; 20445 20446 default: 20447 return true; 20448 } 20449 } 20450 20451 /** 20452 * Reset resolved text direction. Text direction will be resolved during a call to 20453 * {@link #onMeasure(int, int)}. 20454 * 20455 * @hide 20456 */ 20457 public void resetResolvedTextDirection() { 20458 // Reset any previous text direction resolution 20459 mPrivateFlags2 &= ~(PFLAG2_TEXT_DIRECTION_RESOLVED | PFLAG2_TEXT_DIRECTION_RESOLVED_MASK); 20460 // Set to default value 20461 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT; 20462 } 20463 20464 /** 20465 * @return true if text direction is inherited. 20466 * 20467 * @hide 20468 */ 20469 public boolean isTextDirectionInherited() { 20470 return (getRawTextDirection() == TEXT_DIRECTION_INHERIT); 20471 } 20472 20473 /** 20474 * @return true if text direction is resolved. 20475 */ 20476 public boolean isTextDirectionResolved() { 20477 return (mPrivateFlags2 & PFLAG2_TEXT_DIRECTION_RESOLVED) == PFLAG2_TEXT_DIRECTION_RESOLVED; 20478 } 20479 20480 /** 20481 * Return the value specifying the text alignment or policy that was set with 20482 * {@link #setTextAlignment(int)}. 20483 * 20484 * @return the defined text alignment. It can be one of: 20485 * 20486 * {@link #TEXT_ALIGNMENT_INHERIT}, 20487 * {@link #TEXT_ALIGNMENT_GRAVITY}, 20488 * {@link #TEXT_ALIGNMENT_CENTER}, 20489 * {@link #TEXT_ALIGNMENT_TEXT_START}, 20490 * {@link #TEXT_ALIGNMENT_TEXT_END}, 20491 * {@link #TEXT_ALIGNMENT_VIEW_START}, 20492 * {@link #TEXT_ALIGNMENT_VIEW_END} 20493 * 20494 * @attr ref android.R.styleable#View_textAlignment 20495 * 20496 * @hide 20497 */ 20498 @ViewDebug.ExportedProperty(category = "text", mapping = { 20499 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_INHERIT, to = "INHERIT"), 20500 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_GRAVITY, to = "GRAVITY"), 20501 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_START, to = "TEXT_START"), 20502 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_END, to = "TEXT_END"), 20503 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_CENTER, to = "CENTER"), 20504 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_START, to = "VIEW_START"), 20505 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_END, to = "VIEW_END") 20506 }) 20507 @TextAlignment 20508 public int getRawTextAlignment() { 20509 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_MASK) >> PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 20510 } 20511 20512 /** 20513 * Set the text alignment. 20514 * 20515 * @param textAlignment The text alignment to set. Should be one of 20516 * 20517 * {@link #TEXT_ALIGNMENT_INHERIT}, 20518 * {@link #TEXT_ALIGNMENT_GRAVITY}, 20519 * {@link #TEXT_ALIGNMENT_CENTER}, 20520 * {@link #TEXT_ALIGNMENT_TEXT_START}, 20521 * {@link #TEXT_ALIGNMENT_TEXT_END}, 20522 * {@link #TEXT_ALIGNMENT_VIEW_START}, 20523 * {@link #TEXT_ALIGNMENT_VIEW_END} 20524 * 20525 * Resolution will be done if the value is set to TEXT_ALIGNMENT_INHERIT. The resolution 20526 * proceeds up the parent chain of the view to get the value. If there is no parent, then it 20527 * will return the default {@link #TEXT_ALIGNMENT_GRAVITY}. 20528 * 20529 * @attr ref android.R.styleable#View_textAlignment 20530 */ 20531 public void setTextAlignment(@TextAlignment int textAlignment) { 20532 if (textAlignment != getRawTextAlignment()) { 20533 // Reset the current and resolved text alignment 20534 mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; 20535 resetResolvedTextAlignment(); 20536 // Set the new text alignment 20537 mPrivateFlags2 |= 20538 ((textAlignment << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) & PFLAG2_TEXT_ALIGNMENT_MASK); 20539 // Do resolution 20540 resolveTextAlignment(); 20541 // Notify change 20542 onRtlPropertiesChanged(getLayoutDirection()); 20543 // Refresh 20544 requestLayout(); 20545 invalidate(true); 20546 } 20547 } 20548 20549 /** 20550 * Return the resolved text alignment. 20551 * 20552 * @return the resolved text alignment. Returns one of: 20553 * 20554 * {@link #TEXT_ALIGNMENT_GRAVITY}, 20555 * {@link #TEXT_ALIGNMENT_CENTER}, 20556 * {@link #TEXT_ALIGNMENT_TEXT_START}, 20557 * {@link #TEXT_ALIGNMENT_TEXT_END}, 20558 * {@link #TEXT_ALIGNMENT_VIEW_START}, 20559 * {@link #TEXT_ALIGNMENT_VIEW_END} 20560 * 20561 * @attr ref android.R.styleable#View_textAlignment 20562 */ 20563 @ViewDebug.ExportedProperty(category = "text", mapping = { 20564 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_INHERIT, to = "INHERIT"), 20565 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_GRAVITY, to = "GRAVITY"), 20566 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_START, to = "TEXT_START"), 20567 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_TEXT_END, to = "TEXT_END"), 20568 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_CENTER, to = "CENTER"), 20569 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_START, to = "VIEW_START"), 20570 @ViewDebug.IntToString(from = TEXT_ALIGNMENT_VIEW_END, to = "VIEW_END") 20571 }) 20572 @TextAlignment 20573 public int getTextAlignment() { 20574 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK) >> 20575 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 20576 } 20577 20578 /** 20579 * Resolve the text alignment. 20580 * 20581 * @return true if resolution has been done, false otherwise. 20582 * 20583 * @hide 20584 */ 20585 public boolean resolveTextAlignment() { 20586 // Reset any previous text alignment resolution 20587 mPrivateFlags2 &= ~(PFLAG2_TEXT_ALIGNMENT_RESOLVED | PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK); 20588 20589 if (hasRtlSupport()) { 20590 // Set resolved text alignment flag depending on text alignment flag 20591 final int textAlignment = getRawTextAlignment(); 20592 switch (textAlignment) { 20593 case TEXT_ALIGNMENT_INHERIT: 20594 // Check if we can resolve the text alignment 20595 if (!canResolveTextAlignment()) { 20596 // We cannot do the resolution if there is no parent so use the default 20597 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20598 // Resolution will need to happen again later 20599 return false; 20600 } 20601 20602 // Parent has not yet resolved, so we still return the default 20603 try { 20604 if (!mParent.isTextAlignmentResolved()) { 20605 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20606 // Resolution will need to happen again later 20607 return false; 20608 } 20609 } catch (AbstractMethodError e) { 20610 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 20611 " does not fully implement ViewParent", e); 20612 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED | 20613 PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20614 return true; 20615 } 20616 20617 int parentResolvedTextAlignment; 20618 try { 20619 parentResolvedTextAlignment = mParent.getTextAlignment(); 20620 } catch (AbstractMethodError e) { 20621 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 20622 " does not fully implement ViewParent", e); 20623 parentResolvedTextAlignment = TEXT_ALIGNMENT_GRAVITY; 20624 } 20625 switch (parentResolvedTextAlignment) { 20626 case TEXT_ALIGNMENT_GRAVITY: 20627 case TEXT_ALIGNMENT_TEXT_START: 20628 case TEXT_ALIGNMENT_TEXT_END: 20629 case TEXT_ALIGNMENT_CENTER: 20630 case TEXT_ALIGNMENT_VIEW_START: 20631 case TEXT_ALIGNMENT_VIEW_END: 20632 // Resolved text alignment is the same as the parent resolved 20633 // text alignment 20634 mPrivateFlags2 |= 20635 (parentResolvedTextAlignment << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT); 20636 break; 20637 default: 20638 // Use default resolved text alignment 20639 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20640 } 20641 break; 20642 case TEXT_ALIGNMENT_GRAVITY: 20643 case TEXT_ALIGNMENT_TEXT_START: 20644 case TEXT_ALIGNMENT_TEXT_END: 20645 case TEXT_ALIGNMENT_CENTER: 20646 case TEXT_ALIGNMENT_VIEW_START: 20647 case TEXT_ALIGNMENT_VIEW_END: 20648 // Resolved text alignment is the same as text alignment 20649 mPrivateFlags2 |= (textAlignment << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT); 20650 break; 20651 default: 20652 // Use default resolved text alignment 20653 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20654 } 20655 } else { 20656 // Use default resolved text alignment 20657 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20658 } 20659 20660 // Set the resolved 20661 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED; 20662 return true; 20663 } 20664 20665 /** 20666 * Check if text alignment resolution can be done. 20667 * 20668 * @return true if text alignment resolution can be done otherwise return false. 20669 */ 20670 public boolean canResolveTextAlignment() { 20671 switch (getRawTextAlignment()) { 20672 case TEXT_DIRECTION_INHERIT: 20673 if (mParent != null) { 20674 try { 20675 return mParent.canResolveTextAlignment(); 20676 } catch (AbstractMethodError e) { 20677 Log.e(VIEW_LOG_TAG, mParent.getClass().getSimpleName() + 20678 " does not fully implement ViewParent", e); 20679 } 20680 } 20681 return false; 20682 20683 default: 20684 return true; 20685 } 20686 } 20687 20688 /** 20689 * Reset resolved text alignment. Text alignment will be resolved during a call to 20690 * {@link #onMeasure(int, int)}. 20691 * 20692 * @hide 20693 */ 20694 public void resetResolvedTextAlignment() { 20695 // Reset any previous text alignment resolution 20696 mPrivateFlags2 &= ~(PFLAG2_TEXT_ALIGNMENT_RESOLVED | PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK); 20697 // Set to default 20698 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT; 20699 } 20700 20701 /** 20702 * @return true if text alignment is inherited. 20703 * 20704 * @hide 20705 */ 20706 public boolean isTextAlignmentInherited() { 20707 return (getRawTextAlignment() == TEXT_ALIGNMENT_INHERIT); 20708 } 20709 20710 /** 20711 * @return true if text alignment is resolved. 20712 */ 20713 public boolean isTextAlignmentResolved() { 20714 return (mPrivateFlags2 & PFLAG2_TEXT_ALIGNMENT_RESOLVED) == PFLAG2_TEXT_ALIGNMENT_RESOLVED; 20715 } 20716 20717 /** 20718 * Generate a value suitable for use in {@link #setId(int)}. 20719 * This value will not collide with ID values generated at build time by aapt for R.id. 20720 * 20721 * @return a generated ID value 20722 */ 20723 public static int generateViewId() { 20724 for (;;) { 20725 final int result = sNextGeneratedId.get(); 20726 // aapt-generated IDs have the high byte nonzero; clamp to the range under that. 20727 int newValue = result + 1; 20728 if (newValue > 0x00FFFFFF) newValue = 1; // Roll over to 1, not 0. 20729 if (sNextGeneratedId.compareAndSet(result, newValue)) { 20730 return result; 20731 } 20732 } 20733 } 20734 20735 /** 20736 * Gets the Views in the hierarchy affected by entering and exiting Activity Scene transitions. 20737 * @param transitioningViews This View will be added to transitioningViews if it is VISIBLE and 20738 * a normal View or a ViewGroup with 20739 * {@link android.view.ViewGroup#isTransitionGroup()} true. 20740 * @hide 20741 */ 20742 public void captureTransitioningViews(List<View> transitioningViews) { 20743 if (getVisibility() == View.VISIBLE) { 20744 transitioningViews.add(this); 20745 } 20746 } 20747 20748 /** 20749 * Adds all Views that have {@link #getTransitionName()} non-null to namedElements. 20750 * @param namedElements Will contain all Views in the hierarchy having a transitionName. 20751 * @hide 20752 */ 20753 public void findNamedViews(Map<String, View> namedElements) { 20754 if (getVisibility() == VISIBLE || mGhostView != null) { 20755 String transitionName = getTransitionName(); 20756 if (transitionName != null) { 20757 namedElements.put(transitionName, this); 20758 } 20759 } 20760 } 20761 20762 // 20763 // Properties 20764 // 20765 /** 20766 * A Property wrapper around the <code>alpha</code> functionality handled by the 20767 * {@link View#setAlpha(float)} and {@link View#getAlpha()} methods. 20768 */ 20769 public static final Property<View, Float> ALPHA = new FloatProperty<View>("alpha") { 20770 @Override 20771 public void setValue(View object, float value) { 20772 object.setAlpha(value); 20773 } 20774 20775 @Override 20776 public Float get(View object) { 20777 return object.getAlpha(); 20778 } 20779 }; 20780 20781 /** 20782 * A Property wrapper around the <code>translationX</code> functionality handled by the 20783 * {@link View#setTranslationX(float)} and {@link View#getTranslationX()} methods. 20784 */ 20785 public static final Property<View, Float> TRANSLATION_X = new FloatProperty<View>("translationX") { 20786 @Override 20787 public void setValue(View object, float value) { 20788 object.setTranslationX(value); 20789 } 20790 20791 @Override 20792 public Float get(View object) { 20793 return object.getTranslationX(); 20794 } 20795 }; 20796 20797 /** 20798 * A Property wrapper around the <code>translationY</code> functionality handled by the 20799 * {@link View#setTranslationY(float)} and {@link View#getTranslationY()} methods. 20800 */ 20801 public static final Property<View, Float> TRANSLATION_Y = new FloatProperty<View>("translationY") { 20802 @Override 20803 public void setValue(View object, float value) { 20804 object.setTranslationY(value); 20805 } 20806 20807 @Override 20808 public Float get(View object) { 20809 return object.getTranslationY(); 20810 } 20811 }; 20812 20813 /** 20814 * A Property wrapper around the <code>translationZ</code> functionality handled by the 20815 * {@link View#setTranslationZ(float)} and {@link View#getTranslationZ()} methods. 20816 */ 20817 public static final Property<View, Float> TRANSLATION_Z = new FloatProperty<View>("translationZ") { 20818 @Override 20819 public void setValue(View object, float value) { 20820 object.setTranslationZ(value); 20821 } 20822 20823 @Override 20824 public Float get(View object) { 20825 return object.getTranslationZ(); 20826 } 20827 }; 20828 20829 /** 20830 * A Property wrapper around the <code>x</code> functionality handled by the 20831 * {@link View#setX(float)} and {@link View#getX()} methods. 20832 */ 20833 public static final Property<View, Float> X = new FloatProperty<View>("x") { 20834 @Override 20835 public void setValue(View object, float value) { 20836 object.setX(value); 20837 } 20838 20839 @Override 20840 public Float get(View object) { 20841 return object.getX(); 20842 } 20843 }; 20844 20845 /** 20846 * A Property wrapper around the <code>y</code> functionality handled by the 20847 * {@link View#setY(float)} and {@link View#getY()} methods. 20848 */ 20849 public static final Property<View, Float> Y = new FloatProperty<View>("y") { 20850 @Override 20851 public void setValue(View object, float value) { 20852 object.setY(value); 20853 } 20854 20855 @Override 20856 public Float get(View object) { 20857 return object.getY(); 20858 } 20859 }; 20860 20861 /** 20862 * A Property wrapper around the <code>z</code> functionality handled by the 20863 * {@link View#setZ(float)} and {@link View#getZ()} methods. 20864 */ 20865 public static final Property<View, Float> Z = new FloatProperty<View>("z") { 20866 @Override 20867 public void setValue(View object, float value) { 20868 object.setZ(value); 20869 } 20870 20871 @Override 20872 public Float get(View object) { 20873 return object.getZ(); 20874 } 20875 }; 20876 20877 /** 20878 * A Property wrapper around the <code>rotation</code> functionality handled by the 20879 * {@link View#setRotation(float)} and {@link View#getRotation()} methods. 20880 */ 20881 public static final Property<View, Float> ROTATION = new FloatProperty<View>("rotation") { 20882 @Override 20883 public void setValue(View object, float value) { 20884 object.setRotation(value); 20885 } 20886 20887 @Override 20888 public Float get(View object) { 20889 return object.getRotation(); 20890 } 20891 }; 20892 20893 /** 20894 * A Property wrapper around the <code>rotationX</code> functionality handled by the 20895 * {@link View#setRotationX(float)} and {@link View#getRotationX()} methods. 20896 */ 20897 public static final Property<View, Float> ROTATION_X = new FloatProperty<View>("rotationX") { 20898 @Override 20899 public void setValue(View object, float value) { 20900 object.setRotationX(value); 20901 } 20902 20903 @Override 20904 public Float get(View object) { 20905 return object.getRotationX(); 20906 } 20907 }; 20908 20909 /** 20910 * A Property wrapper around the <code>rotationY</code> functionality handled by the 20911 * {@link View#setRotationY(float)} and {@link View#getRotationY()} methods. 20912 */ 20913 public static final Property<View, Float> ROTATION_Y = new FloatProperty<View>("rotationY") { 20914 @Override 20915 public void setValue(View object, float value) { 20916 object.setRotationY(value); 20917 } 20918 20919 @Override 20920 public Float get(View object) { 20921 return object.getRotationY(); 20922 } 20923 }; 20924 20925 /** 20926 * A Property wrapper around the <code>scaleX</code> functionality handled by the 20927 * {@link View#setScaleX(float)} and {@link View#getScaleX()} methods. 20928 */ 20929 public static final Property<View, Float> SCALE_X = new FloatProperty<View>("scaleX") { 20930 @Override 20931 public void setValue(View object, float value) { 20932 object.setScaleX(value); 20933 } 20934 20935 @Override 20936 public Float get(View object) { 20937 return object.getScaleX(); 20938 } 20939 }; 20940 20941 /** 20942 * A Property wrapper around the <code>scaleY</code> functionality handled by the 20943 * {@link View#setScaleY(float)} and {@link View#getScaleY()} methods. 20944 */ 20945 public static final Property<View, Float> SCALE_Y = new FloatProperty<View>("scaleY") { 20946 @Override 20947 public void setValue(View object, float value) { 20948 object.setScaleY(value); 20949 } 20950 20951 @Override 20952 public Float get(View object) { 20953 return object.getScaleY(); 20954 } 20955 }; 20956 20957 /** 20958 * A MeasureSpec encapsulates the layout requirements passed from parent to child. 20959 * Each MeasureSpec represents a requirement for either the width or the height. 20960 * A MeasureSpec is comprised of a size and a mode. There are three possible 20961 * modes: 20962 * <dl> 20963 * <dt>UNSPECIFIED</dt> 20964 * <dd> 20965 * The parent has not imposed any constraint on the child. It can be whatever size 20966 * it wants. 20967 * </dd> 20968 * 20969 * <dt>EXACTLY</dt> 20970 * <dd> 20971 * The parent has determined an exact size for the child. The child is going to be 20972 * given those bounds regardless of how big it wants to be. 20973 * </dd> 20974 * 20975 * <dt>AT_MOST</dt> 20976 * <dd> 20977 * The child can be as large as it wants up to the specified size. 20978 * </dd> 20979 * </dl> 20980 * 20981 * MeasureSpecs are implemented as ints to reduce object allocation. This class 20982 * is provided to pack and unpack the <size, mode> tuple into the int. 20983 */ 20984 public static class MeasureSpec { 20985 private static final int MODE_SHIFT = 30; 20986 private static final int MODE_MASK = 0x3 << MODE_SHIFT; 20987 20988 /** 20989 * Measure specification mode: The parent has not imposed any constraint 20990 * on the child. It can be whatever size it wants. 20991 */ 20992 public static final int UNSPECIFIED = 0 << MODE_SHIFT; 20993 20994 /** 20995 * Measure specification mode: The parent has determined an exact size 20996 * for the child. The child is going to be given those bounds regardless 20997 * of how big it wants to be. 20998 */ 20999 public static final int EXACTLY = 1 << MODE_SHIFT; 21000 21001 /** 21002 * Measure specification mode: The child can be as large as it wants up 21003 * to the specified size. 21004 */ 21005 public static final int AT_MOST = 2 << MODE_SHIFT; 21006 21007 /** 21008 * Creates a measure specification based on the supplied size and mode. 21009 * 21010 * The mode must always be one of the following: 21011 * <ul> 21012 * <li>{@link android.view.View.MeasureSpec#UNSPECIFIED}</li> 21013 * <li>{@link android.view.View.MeasureSpec#EXACTLY}</li> 21014 * <li>{@link android.view.View.MeasureSpec#AT_MOST}</li> 21015 * </ul> 21016 * 21017 * <p><strong>Note:</strong> On API level 17 and lower, makeMeasureSpec's 21018 * implementation was such that the order of arguments did not matter 21019 * and overflow in either value could impact the resulting MeasureSpec. 21020 * {@link android.widget.RelativeLayout} was affected by this bug. 21021 * Apps targeting API levels greater than 17 will get the fixed, more strict 21022 * behavior.</p> 21023 * 21024 * @param size the size of the measure specification 21025 * @param mode the mode of the measure specification 21026 * @return the measure specification based on size and mode 21027 */ 21028 public static int makeMeasureSpec(int size, int mode) { 21029 if (sUseBrokenMakeMeasureSpec) { 21030 return size + mode; 21031 } else { 21032 return (size & ~MODE_MASK) | (mode & MODE_MASK); 21033 } 21034 } 21035 21036 /** 21037 * Like {@link #makeMeasureSpec(int, int)}, but any spec with a mode of UNSPECIFIED 21038 * will automatically get a size of 0. Older apps expect this. 21039 * 21040 * @hide internal use only for compatibility with system widgets and older apps 21041 */ 21042 public static int makeSafeMeasureSpec(int size, int mode) { 21043 if (sUseZeroUnspecifiedMeasureSpec && mode == UNSPECIFIED) { 21044 return 0; 21045 } 21046 return makeMeasureSpec(size, mode); 21047 } 21048 21049 /** 21050 * Extracts the mode from the supplied measure specification. 21051 * 21052 * @param measureSpec the measure specification to extract the mode from 21053 * @return {@link android.view.View.MeasureSpec#UNSPECIFIED}, 21054 * {@link android.view.View.MeasureSpec#AT_MOST} or 21055 * {@link android.view.View.MeasureSpec#EXACTLY} 21056 */ 21057 public static int getMode(int measureSpec) { 21058 return (measureSpec & MODE_MASK); 21059 } 21060 21061 /** 21062 * Extracts the size from the supplied measure specification. 21063 * 21064 * @param measureSpec the measure specification to extract the size from 21065 * @return the size in pixels defined in the supplied measure specification 21066 */ 21067 public static int getSize(int measureSpec) { 21068 return (measureSpec & ~MODE_MASK); 21069 } 21070 21071 static int adjust(int measureSpec, int delta) { 21072 final int mode = getMode(measureSpec); 21073 int size = getSize(measureSpec); 21074 if (mode == UNSPECIFIED) { 21075 // No need to adjust size for UNSPECIFIED mode. 21076 return makeMeasureSpec(size, UNSPECIFIED); 21077 } 21078 size += delta; 21079 if (size < 0) { 21080 Log.e(VIEW_LOG_TAG, "MeasureSpec.adjust: new size would be negative! (" + size + 21081 ") spec: " + toString(measureSpec) + " delta: " + delta); 21082 size = 0; 21083 } 21084 return makeMeasureSpec(size, mode); 21085 } 21086 21087 /** 21088 * Returns a String representation of the specified measure 21089 * specification. 21090 * 21091 * @param measureSpec the measure specification to convert to a String 21092 * @return a String with the following format: "MeasureSpec: MODE SIZE" 21093 */ 21094 public static String toString(int measureSpec) { 21095 int mode = getMode(measureSpec); 21096 int size = getSize(measureSpec); 21097 21098 StringBuilder sb = new StringBuilder("MeasureSpec: "); 21099 21100 if (mode == UNSPECIFIED) 21101 sb.append("UNSPECIFIED "); 21102 else if (mode == EXACTLY) 21103 sb.append("EXACTLY "); 21104 else if (mode == AT_MOST) 21105 sb.append("AT_MOST "); 21106 else 21107 sb.append(mode).append(" "); 21108 21109 sb.append(size); 21110 return sb.toString(); 21111 } 21112 } 21113 21114 private final class CheckForLongPress implements Runnable { 21115 private int mOriginalWindowAttachCount; 21116 21117 @Override 21118 public void run() { 21119 if (isPressed() && (mParent != null) 21120 && mOriginalWindowAttachCount == mWindowAttachCount) { 21121 if (performLongClick()) { 21122 mHasPerformedLongPress = true; 21123 } 21124 } 21125 } 21126 21127 public void rememberWindowAttachCount() { 21128 mOriginalWindowAttachCount = mWindowAttachCount; 21129 } 21130 } 21131 21132 private final class CheckForTap implements Runnable { 21133 public float x; 21134 public float y; 21135 21136 @Override 21137 public void run() { 21138 mPrivateFlags &= ~PFLAG_PREPRESSED; 21139 setPressed(true, x, y); 21140 checkForLongClick(ViewConfiguration.getTapTimeout()); 21141 } 21142 } 21143 21144 private final class PerformClick implements Runnable { 21145 @Override 21146 public void run() { 21147 performClick(); 21148 } 21149 } 21150 21151 /** @hide */ 21152 public void hackTurnOffWindowResizeAnim(boolean off) { 21153 mAttachInfo.mTurnOffWindowResizeAnim = off; 21154 } 21155 21156 /** 21157 * This method returns a ViewPropertyAnimator object, which can be used to animate 21158 * specific properties on this View. 21159 * 21160 * @return ViewPropertyAnimator The ViewPropertyAnimator associated with this View. 21161 */ 21162 public ViewPropertyAnimator animate() { 21163 if (mAnimator == null) { 21164 mAnimator = new ViewPropertyAnimator(this); 21165 } 21166 return mAnimator; 21167 } 21168 21169 /** 21170 * Sets the name of the View to be used to identify Views in Transitions. 21171 * Names should be unique in the View hierarchy. 21172 * 21173 * @param transitionName The name of the View to uniquely identify it for Transitions. 21174 */ 21175 public final void setTransitionName(String transitionName) { 21176 mTransitionName = transitionName; 21177 } 21178 21179 /** 21180 * Returns the name of the View to be used to identify Views in Transitions. 21181 * Names should be unique in the View hierarchy. 21182 * 21183 * <p>This returns null if the View has not been given a name.</p> 21184 * 21185 * @return The name used of the View to be used to identify Views in Transitions or null 21186 * if no name has been given. 21187 */ 21188 @ViewDebug.ExportedProperty 21189 public String getTransitionName() { 21190 return mTransitionName; 21191 } 21192 21193 /** 21194 * Interface definition for a callback to be invoked when a hardware key event is 21195 * dispatched to this view. The callback will be invoked before the key event is 21196 * given to the view. This is only useful for hardware keyboards; a software input 21197 * method has no obligation to trigger this listener. 21198 */ 21199 public interface OnKeyListener { 21200 /** 21201 * Called when a hardware key is dispatched to a view. This allows listeners to 21202 * get a chance to respond before the target view. 21203 * <p>Key presses in software keyboards will generally NOT trigger this method, 21204 * although some may elect to do so in some situations. Do not assume a 21205 * software input method has to be key-based; even if it is, it may use key presses 21206 * in a different way than you expect, so there is no way to reliably catch soft 21207 * input key presses. 21208 * 21209 * @param v The view the key has been dispatched to. 21210 * @param keyCode The code for the physical key that was pressed 21211 * @param event The KeyEvent object containing full information about 21212 * the event. 21213 * @return True if the listener has consumed the event, false otherwise. 21214 */ 21215 boolean onKey(View v, int keyCode, KeyEvent event); 21216 } 21217 21218 /** 21219 * Interface definition for a callback to be invoked when a touch event is 21220 * dispatched to this view. The callback will be invoked before the touch 21221 * event is given to the view. 21222 */ 21223 public interface OnTouchListener { 21224 /** 21225 * Called when a touch event is dispatched to a view. This allows listeners to 21226 * get a chance to respond before the target view. 21227 * 21228 * @param v The view the touch event has been dispatched to. 21229 * @param event The MotionEvent object containing full information about 21230 * the event. 21231 * @return True if the listener has consumed the event, false otherwise. 21232 */ 21233 boolean onTouch(View v, MotionEvent event); 21234 } 21235 21236 /** 21237 * Interface definition for a callback to be invoked when a hover event is 21238 * dispatched to this view. The callback will be invoked before the hover 21239 * event is given to the view. 21240 */ 21241 public interface OnHoverListener { 21242 /** 21243 * Called when a hover event is dispatched to a view. This allows listeners to 21244 * get a chance to respond before the target view. 21245 * 21246 * @param v The view the hover event has been dispatched to. 21247 * @param event The MotionEvent object containing full information about 21248 * the event. 21249 * @return True if the listener has consumed the event, false otherwise. 21250 */ 21251 boolean onHover(View v, MotionEvent event); 21252 } 21253 21254 /** 21255 * Interface definition for a callback to be invoked when a generic motion event is 21256 * dispatched to this view. The callback will be invoked before the generic motion 21257 * event is given to the view. 21258 */ 21259 public interface OnGenericMotionListener { 21260 /** 21261 * Called when a generic motion event is dispatched to a view. This allows listeners to 21262 * get a chance to respond before the target view. 21263 * 21264 * @param v The view the generic motion event has been dispatched to. 21265 * @param event The MotionEvent object containing full information about 21266 * the event. 21267 * @return True if the listener has consumed the event, false otherwise. 21268 */ 21269 boolean onGenericMotion(View v, MotionEvent event); 21270 } 21271 21272 /** 21273 * Interface definition for a callback to be invoked when a view has been clicked and held. 21274 */ 21275 public interface OnLongClickListener { 21276 /** 21277 * Called when a view has been clicked and held. 21278 * 21279 * @param v The view that was clicked and held. 21280 * 21281 * @return true if the callback consumed the long click, false otherwise. 21282 */ 21283 boolean onLongClick(View v); 21284 } 21285 21286 /** 21287 * Interface definition for a callback to be invoked when a drag is being dispatched 21288 * to this view. The callback will be invoked before the hosting view's own 21289 * onDrag(event) method. If the listener wants to fall back to the hosting view's 21290 * onDrag(event) behavior, it should return 'false' from this callback. 21291 * 21292 * <div class="special reference"> 21293 * <h3>Developer Guides</h3> 21294 * <p>For a guide to implementing drag and drop features, read the 21295 * <a href="{@docRoot}guide/topics/ui/drag-drop.html">Drag and Drop</a> developer guide.</p> 21296 * </div> 21297 */ 21298 public interface OnDragListener { 21299 /** 21300 * Called when a drag event is dispatched to a view. This allows listeners 21301 * to get a chance to override base View behavior. 21302 * 21303 * @param v The View that received the drag event. 21304 * @param event The {@link android.view.DragEvent} object for the drag event. 21305 * @return {@code true} if the drag event was handled successfully, or {@code false} 21306 * if the drag event was not handled. Note that {@code false} will trigger the View 21307 * to call its {@link #onDragEvent(DragEvent) onDragEvent()} handler. 21308 */ 21309 boolean onDrag(View v, DragEvent event); 21310 } 21311 21312 /** 21313 * Interface definition for a callback to be invoked when the focus state of 21314 * a view changed. 21315 */ 21316 public interface OnFocusChangeListener { 21317 /** 21318 * Called when the focus state of a view has changed. 21319 * 21320 * @param v The view whose state has changed. 21321 * @param hasFocus The new focus state of v. 21322 */ 21323 void onFocusChange(View v, boolean hasFocus); 21324 } 21325 21326 /** 21327 * Interface definition for a callback to be invoked when a view is clicked. 21328 */ 21329 public interface OnClickListener { 21330 /** 21331 * Called when a view has been clicked. 21332 * 21333 * @param v The view that was clicked. 21334 */ 21335 void onClick(View v); 21336 } 21337 21338 /** 21339 * Interface definition for a callback to be invoked when a view is context clicked. 21340 */ 21341 public interface OnContextClickListener { 21342 /** 21343 * Called when a view is context clicked. 21344 * 21345 * @param v The view that has been context clicked. 21346 * @return true if the callback consumed the context click, false otherwise. 21347 */ 21348 boolean onContextClick(View v); 21349 } 21350 21351 /** 21352 * Interface definition for a callback to be invoked when the context menu 21353 * for this view is being built. 21354 */ 21355 public interface OnCreateContextMenuListener { 21356 /** 21357 * Called when the context menu for this view is being built. It is not 21358 * safe to hold onto the menu after this method returns. 21359 * 21360 * @param menu The context menu that is being built 21361 * @param v The view for which the context menu is being built 21362 * @param menuInfo Extra information about the item for which the 21363 * context menu should be shown. This information will vary 21364 * depending on the class of v. 21365 */ 21366 void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo); 21367 } 21368 21369 /** 21370 * Interface definition for a callback to be invoked when the status bar changes 21371 * visibility. This reports <strong>global</strong> changes to the system UI 21372 * state, not what the application is requesting. 21373 * 21374 * @see View#setOnSystemUiVisibilityChangeListener(android.view.View.OnSystemUiVisibilityChangeListener) 21375 */ 21376 public interface OnSystemUiVisibilityChangeListener { 21377 /** 21378 * Called when the status bar changes visibility because of a call to 21379 * {@link View#setSystemUiVisibility(int)}. 21380 * 21381 * @param visibility Bitwise-or of flags {@link #SYSTEM_UI_FLAG_LOW_PROFILE}, 21382 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, and {@link #SYSTEM_UI_FLAG_FULLSCREEN}. 21383 * This tells you the <strong>global</strong> state of these UI visibility 21384 * flags, not what your app is currently applying. 21385 */ 21386 public void onSystemUiVisibilityChange(int visibility); 21387 } 21388 21389 /** 21390 * Interface definition for a callback to be invoked when this view is attached 21391 * or detached from its window. 21392 */ 21393 public interface OnAttachStateChangeListener { 21394 /** 21395 * Called when the view is attached to a window. 21396 * @param v The view that was attached 21397 */ 21398 public void onViewAttachedToWindow(View v); 21399 /** 21400 * Called when the view is detached from a window. 21401 * @param v The view that was detached 21402 */ 21403 public void onViewDetachedFromWindow(View v); 21404 } 21405 21406 /** 21407 * Listener for applying window insets on a view in a custom way. 21408 * 21409 * <p>Apps may choose to implement this interface if they want to apply custom policy 21410 * to the way that window insets are treated for a view. If an OnApplyWindowInsetsListener 21411 * is set, its 21412 * {@link OnApplyWindowInsetsListener#onApplyWindowInsets(View, WindowInsets) onApplyWindowInsets} 21413 * method will be called instead of the View's own 21414 * {@link #onApplyWindowInsets(WindowInsets) onApplyWindowInsets} method. The listener 21415 * may optionally call the parameter View's <code>onApplyWindowInsets</code> method to apply 21416 * the View's normal behavior as part of its own.</p> 21417 */ 21418 public interface OnApplyWindowInsetsListener { 21419 /** 21420 * When {@link View#setOnApplyWindowInsetsListener(View.OnApplyWindowInsetsListener) set} 21421 * on a View, this listener method will be called instead of the view's own 21422 * {@link View#onApplyWindowInsets(WindowInsets) onApplyWindowInsets} method. 21423 * 21424 * @param v The view applying window insets 21425 * @param insets The insets to apply 21426 * @return The insets supplied, minus any insets that were consumed 21427 */ 21428 public WindowInsets onApplyWindowInsets(View v, WindowInsets insets); 21429 } 21430 21431 private final class UnsetPressedState implements Runnable { 21432 @Override 21433 public void run() { 21434 setPressed(false); 21435 } 21436 } 21437 21438 /** 21439 * Base class for derived classes that want to save and restore their own 21440 * state in {@link android.view.View#onSaveInstanceState()}. 21441 */ 21442 public static class BaseSavedState extends AbsSavedState { 21443 String mStartActivityRequestWhoSaved; 21444 21445 /** 21446 * Constructor used when reading from a parcel. Reads the state of the superclass. 21447 * 21448 * @param source 21449 */ 21450 public BaseSavedState(Parcel source) { 21451 super(source); 21452 mStartActivityRequestWhoSaved = source.readString(); 21453 } 21454 21455 /** 21456 * Constructor called by derived classes when creating their SavedState objects 21457 * 21458 * @param superState The state of the superclass of this view 21459 */ 21460 public BaseSavedState(Parcelable superState) { 21461 super(superState); 21462 } 21463 21464 @Override 21465 public void writeToParcel(Parcel out, int flags) { 21466 super.writeToParcel(out, flags); 21467 out.writeString(mStartActivityRequestWhoSaved); 21468 } 21469 21470 public static final Parcelable.Creator<BaseSavedState> CREATOR = 21471 new Parcelable.Creator<BaseSavedState>() { 21472 public BaseSavedState createFromParcel(Parcel in) { 21473 return new BaseSavedState(in); 21474 } 21475 21476 public BaseSavedState[] newArray(int size) { 21477 return new BaseSavedState[size]; 21478 } 21479 }; 21480 } 21481 21482 /** 21483 * A set of information given to a view when it is attached to its parent 21484 * window. 21485 */ 21486 final static class AttachInfo { 21487 interface Callbacks { 21488 void playSoundEffect(int effectId); 21489 boolean performHapticFeedback(int effectId, boolean always); 21490 } 21491 21492 /** 21493 * InvalidateInfo is used to post invalidate(int, int, int, int) messages 21494 * to a Handler. This class contains the target (View) to invalidate and 21495 * the coordinates of the dirty rectangle. 21496 * 21497 * For performance purposes, this class also implements a pool of up to 21498 * POOL_LIMIT objects that get reused. This reduces memory allocations 21499 * whenever possible. 21500 */ 21501 static class InvalidateInfo { 21502 private static final int POOL_LIMIT = 10; 21503 21504 private static final SynchronizedPool<InvalidateInfo> sPool = 21505 new SynchronizedPool<InvalidateInfo>(POOL_LIMIT); 21506 21507 View target; 21508 21509 int left; 21510 int top; 21511 int right; 21512 int bottom; 21513 21514 public static InvalidateInfo obtain() { 21515 InvalidateInfo instance = sPool.acquire(); 21516 return (instance != null) ? instance : new InvalidateInfo(); 21517 } 21518 21519 public void recycle() { 21520 target = null; 21521 sPool.release(this); 21522 } 21523 } 21524 21525 final IWindowSession mSession; 21526 21527 final IWindow mWindow; 21528 21529 final IBinder mWindowToken; 21530 21531 final Display mDisplay; 21532 21533 final Callbacks mRootCallbacks; 21534 21535 IWindowId mIWindowId; 21536 WindowId mWindowId; 21537 21538 /** 21539 * The top view of the hierarchy. 21540 */ 21541 View mRootView; 21542 21543 IBinder mPanelParentWindowToken; 21544 21545 boolean mHardwareAccelerated; 21546 boolean mHardwareAccelerationRequested; 21547 HardwareRenderer mHardwareRenderer; 21548 List<RenderNode> mPendingAnimatingRenderNodes; 21549 21550 /** 21551 * The state of the display to which the window is attached, as reported 21552 * by {@link Display#getState()}. Note that the display state constants 21553 * declared by {@link Display} do not exactly line up with the screen state 21554 * constants declared by {@link View} (there are more display states than 21555 * screen states). 21556 */ 21557 int mDisplayState = Display.STATE_UNKNOWN; 21558 21559 /** 21560 * Scale factor used by the compatibility mode 21561 */ 21562 float mApplicationScale; 21563 21564 /** 21565 * Indicates whether the application is in compatibility mode 21566 */ 21567 boolean mScalingRequired; 21568 21569 /** 21570 * If set, ViewRootImpl doesn't use its lame animation for when the window resizes. 21571 */ 21572 boolean mTurnOffWindowResizeAnim; 21573 21574 /** 21575 * Left position of this view's window 21576 */ 21577 int mWindowLeft; 21578 21579 /** 21580 * Top position of this view's window 21581 */ 21582 int mWindowTop; 21583 21584 /** 21585 * Indicates whether views need to use 32-bit drawing caches 21586 */ 21587 boolean mUse32BitDrawingCache; 21588 21589 /** 21590 * For windows that are full-screen but using insets to layout inside 21591 * of the screen areas, these are the current insets to appear inside 21592 * the overscan area of the display. 21593 */ 21594 final Rect mOverscanInsets = new Rect(); 21595 21596 /** 21597 * For windows that are full-screen but using insets to layout inside 21598 * of the screen decorations, these are the current insets for the 21599 * content of the window. 21600 */ 21601 final Rect mContentInsets = new Rect(); 21602 21603 /** 21604 * For windows that are full-screen but using insets to layout inside 21605 * of the screen decorations, these are the current insets for the 21606 * actual visible parts of the window. 21607 */ 21608 final Rect mVisibleInsets = new Rect(); 21609 21610 /** 21611 * For windows that are full-screen but using insets to layout inside 21612 * of the screen decorations, these are the current insets for the 21613 * stable system windows. 21614 */ 21615 final Rect mStableInsets = new Rect(); 21616 21617 /** 21618 * For windows that include areas that are not covered by real surface these are the outsets 21619 * for real surface. 21620 */ 21621 final Rect mOutsets = new Rect(); 21622 21623 /** 21624 * The internal insets given by this window. This value is 21625 * supplied by the client (through 21626 * {@link ViewTreeObserver.OnComputeInternalInsetsListener}) and will 21627 * be given to the window manager when changed to be used in laying 21628 * out windows behind it. 21629 */ 21630 final ViewTreeObserver.InternalInsetsInfo mGivenInternalInsets 21631 = new ViewTreeObserver.InternalInsetsInfo(); 21632 21633 /** 21634 * Set to true when mGivenInternalInsets is non-empty. 21635 */ 21636 boolean mHasNonEmptyGivenInternalInsets; 21637 21638 /** 21639 * All views in the window's hierarchy that serve as scroll containers, 21640 * used to determine if the window can be resized or must be panned 21641 * to adjust for a soft input area. 21642 */ 21643 final ArrayList<View> mScrollContainers = new ArrayList<View>(); 21644 21645 final KeyEvent.DispatcherState mKeyDispatchState 21646 = new KeyEvent.DispatcherState(); 21647 21648 /** 21649 * Indicates whether the view's window currently has the focus. 21650 */ 21651 boolean mHasWindowFocus; 21652 21653 /** 21654 * The current visibility of the window. 21655 */ 21656 int mWindowVisibility; 21657 21658 /** 21659 * Indicates the time at which drawing started to occur. 21660 */ 21661 long mDrawingTime; 21662 21663 /** 21664 * Indicates whether or not ignoring the DIRTY_MASK flags. 21665 */ 21666 boolean mIgnoreDirtyState; 21667 21668 /** 21669 * This flag tracks when the mIgnoreDirtyState flag is set during draw(), 21670 * to avoid clearing that flag prematurely. 21671 */ 21672 boolean mSetIgnoreDirtyState = false; 21673 21674 /** 21675 * Indicates whether the view's window is currently in touch mode. 21676 */ 21677 boolean mInTouchMode; 21678 21679 /** 21680 * Indicates whether the view has requested unbuffered input dispatching for the current 21681 * event stream. 21682 */ 21683 boolean mUnbufferedDispatchRequested; 21684 21685 /** 21686 * Indicates that ViewAncestor should trigger a global layout change 21687 * the next time it performs a traversal 21688 */ 21689 boolean mRecomputeGlobalAttributes; 21690 21691 /** 21692 * Always report new attributes at next traversal. 21693 */ 21694 boolean mForceReportNewAttributes; 21695 21696 /** 21697 * Set during a traveral if any views want to keep the screen on. 21698 */ 21699 boolean mKeepScreenOn; 21700 21701 /** 21702 * Bitwise-or of all of the values that views have passed to setSystemUiVisibility(). 21703 */ 21704 int mSystemUiVisibility; 21705 21706 /** 21707 * Hack to force certain system UI visibility flags to be cleared. 21708 */ 21709 int mDisabledSystemUiVisibility; 21710 21711 /** 21712 * Last global system UI visibility reported by the window manager. 21713 */ 21714 int mGlobalSystemUiVisibility; 21715 21716 /** 21717 * True if a view in this hierarchy has an OnSystemUiVisibilityChangeListener 21718 * attached. 21719 */ 21720 boolean mHasSystemUiListeners; 21721 21722 /** 21723 * Set if the window has requested to extend into the overscan region 21724 * via WindowManager.LayoutParams.FLAG_LAYOUT_IN_OVERSCAN. 21725 */ 21726 boolean mOverscanRequested; 21727 21728 /** 21729 * Set if the visibility of any views has changed. 21730 */ 21731 boolean mViewVisibilityChanged; 21732 21733 /** 21734 * Set to true if a view has been scrolled. 21735 */ 21736 boolean mViewScrollChanged; 21737 21738 /** 21739 * Set to true if high contrast mode enabled 21740 */ 21741 boolean mHighContrastText; 21742 21743 /** 21744 * Global to the view hierarchy used as a temporary for dealing with 21745 * x/y points in the transparent region computations. 21746 */ 21747 final int[] mTransparentLocation = new int[2]; 21748 21749 /** 21750 * Global to the view hierarchy used as a temporary for dealing with 21751 * x/y points in the ViewGroup.invalidateChild implementation. 21752 */ 21753 final int[] mInvalidateChildLocation = new int[2]; 21754 21755 /** 21756 * Global to the view hierarchy used as a temporary for dealng with 21757 * computing absolute on-screen location. 21758 */ 21759 final int[] mTmpLocation = new int[2]; 21760 21761 /** 21762 * Global to the view hierarchy used as a temporary for dealing with 21763 * x/y location when view is transformed. 21764 */ 21765 final float[] mTmpTransformLocation = new float[2]; 21766 21767 /** 21768 * The view tree observer used to dispatch global events like 21769 * layout, pre-draw, touch mode change, etc. 21770 */ 21771 final ViewTreeObserver mTreeObserver = new ViewTreeObserver(); 21772 21773 /** 21774 * A Canvas used by the view hierarchy to perform bitmap caching. 21775 */ 21776 Canvas mCanvas; 21777 21778 /** 21779 * The view root impl. 21780 */ 21781 final ViewRootImpl mViewRootImpl; 21782 21783 /** 21784 * A Handler supplied by a view's {@link android.view.ViewRootImpl}. This 21785 * handler can be used to pump events in the UI events queue. 21786 */ 21787 final Handler mHandler; 21788 21789 /** 21790 * Temporary for use in computing invalidate rectangles while 21791 * calling up the hierarchy. 21792 */ 21793 final Rect mTmpInvalRect = new Rect(); 21794 21795 /** 21796 * Temporary for use in computing hit areas with transformed views 21797 */ 21798 final RectF mTmpTransformRect = new RectF(); 21799 21800 /** 21801 * Temporary for use in computing hit areas with transformed views 21802 */ 21803 final RectF mTmpTransformRect1 = new RectF(); 21804 21805 /** 21806 * Temporary list of rectanges. 21807 */ 21808 final List<RectF> mTmpRectList = new ArrayList<>(); 21809 21810 /** 21811 * Temporary for use in transforming invalidation rect 21812 */ 21813 final Matrix mTmpMatrix = new Matrix(); 21814 21815 /** 21816 * Temporary for use in transforming invalidation rect 21817 */ 21818 final Transformation mTmpTransformation = new Transformation(); 21819 21820 /** 21821 * Temporary for use in querying outlines from OutlineProviders 21822 */ 21823 final Outline mTmpOutline = new Outline(); 21824 21825 /** 21826 * Temporary list for use in collecting focusable descendents of a view. 21827 */ 21828 final ArrayList<View> mTempArrayList = new ArrayList<View>(24); 21829 21830 /** 21831 * The id of the window for accessibility purposes. 21832 */ 21833 int mAccessibilityWindowId = AccessibilityNodeInfo.UNDEFINED_ITEM_ID; 21834 21835 /** 21836 * Flags related to accessibility processing. 21837 * 21838 * @see AccessibilityNodeInfo#FLAG_INCLUDE_NOT_IMPORTANT_VIEWS 21839 * @see AccessibilityNodeInfo#FLAG_REPORT_VIEW_IDS 21840 */ 21841 int mAccessibilityFetchFlags; 21842 21843 /** 21844 * The drawable for highlighting accessibility focus. 21845 */ 21846 Drawable mAccessibilityFocusDrawable; 21847 21848 /** 21849 * Show where the margins, bounds and layout bounds are for each view. 21850 */ 21851 boolean mDebugLayout = SystemProperties.getBoolean(DEBUG_LAYOUT_PROPERTY, false); 21852 21853 /** 21854 * Point used to compute visible regions. 21855 */ 21856 final Point mPoint = new Point(); 21857 21858 /** 21859 * Used to track which View originated a requestLayout() call, used when 21860 * requestLayout() is called during layout. 21861 */ 21862 View mViewRequestingLayout; 21863 21864 /** 21865 * Creates a new set of attachment information with the specified 21866 * events handler and thread. 21867 * 21868 * @param handler the events handler the view must use 21869 */ 21870 AttachInfo(IWindowSession session, IWindow window, Display display, 21871 ViewRootImpl viewRootImpl, Handler handler, Callbacks effectPlayer) { 21872 mSession = session; 21873 mWindow = window; 21874 mWindowToken = window.asBinder(); 21875 mDisplay = display; 21876 mViewRootImpl = viewRootImpl; 21877 mHandler = handler; 21878 mRootCallbacks = effectPlayer; 21879 } 21880 } 21881 21882 /** 21883 * <p>ScrollabilityCache holds various fields used by a View when scrolling 21884 * is supported. This avoids keeping too many unused fields in most 21885 * instances of View.</p> 21886 */ 21887 private static class ScrollabilityCache implements Runnable { 21888 21889 /** 21890 * Scrollbars are not visible 21891 */ 21892 public static final int OFF = 0; 21893 21894 /** 21895 * Scrollbars are visible 21896 */ 21897 public static final int ON = 1; 21898 21899 /** 21900 * Scrollbars are fading away 21901 */ 21902 public static final int FADING = 2; 21903 21904 public boolean fadeScrollBars; 21905 21906 public int fadingEdgeLength; 21907 public int scrollBarDefaultDelayBeforeFade; 21908 public int scrollBarFadeDuration; 21909 21910 public int scrollBarSize; 21911 public ScrollBarDrawable scrollBar; 21912 public float[] interpolatorValues; 21913 public View host; 21914 21915 public final Paint paint; 21916 public final Matrix matrix; 21917 public Shader shader; 21918 21919 public final Interpolator scrollBarInterpolator = new Interpolator(1, 2); 21920 21921 private static final float[] OPAQUE = { 255 }; 21922 private static final float[] TRANSPARENT = { 0.0f }; 21923 21924 /** 21925 * When fading should start. This time moves into the future every time 21926 * a new scroll happens. Measured based on SystemClock.uptimeMillis() 21927 */ 21928 public long fadeStartTime; 21929 21930 21931 /** 21932 * The current state of the scrollbars: ON, OFF, or FADING 21933 */ 21934 public int state = OFF; 21935 21936 private int mLastColor; 21937 21938 public ScrollabilityCache(ViewConfiguration configuration, View host) { 21939 fadingEdgeLength = configuration.getScaledFadingEdgeLength(); 21940 scrollBarSize = configuration.getScaledScrollBarSize(); 21941 scrollBarDefaultDelayBeforeFade = ViewConfiguration.getScrollDefaultDelay(); 21942 scrollBarFadeDuration = ViewConfiguration.getScrollBarFadeDuration(); 21943 21944 paint = new Paint(); 21945 matrix = new Matrix(); 21946 // use use a height of 1, and then wack the matrix each time we 21947 // actually use it. 21948 shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); 21949 paint.setShader(shader); 21950 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 21951 21952 this.host = host; 21953 } 21954 21955 public void setFadeColor(int color) { 21956 if (color != mLastColor) { 21957 mLastColor = color; 21958 21959 if (color != 0) { 21960 shader = new LinearGradient(0, 0, 0, 1, color | 0xFF000000, 21961 color & 0x00FFFFFF, Shader.TileMode.CLAMP); 21962 paint.setShader(shader); 21963 // Restore the default transfer mode (src_over) 21964 paint.setXfermode(null); 21965 } else { 21966 shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); 21967 paint.setShader(shader); 21968 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); 21969 } 21970 } 21971 } 21972 21973 public void run() { 21974 long now = AnimationUtils.currentAnimationTimeMillis(); 21975 if (now >= fadeStartTime) { 21976 21977 // the animation fades the scrollbars out by changing 21978 // the opacity (alpha) from fully opaque to fully 21979 // transparent 21980 int nextFrame = (int) now; 21981 int framesCount = 0; 21982 21983 Interpolator interpolator = scrollBarInterpolator; 21984 21985 // Start opaque 21986 interpolator.setKeyFrame(framesCount++, nextFrame, OPAQUE); 21987 21988 // End transparent 21989 nextFrame += scrollBarFadeDuration; 21990 interpolator.setKeyFrame(framesCount, nextFrame, TRANSPARENT); 21991 21992 state = FADING; 21993 21994 // Kick off the fade animation 21995 host.invalidate(true); 21996 } 21997 } 21998 } 21999 22000 /** 22001 * Resuable callback for sending 22002 * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. 22003 */ 22004 private class SendViewScrolledAccessibilityEvent implements Runnable { 22005 public volatile boolean mIsPending; 22006 22007 public void run() { 22008 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SCROLLED); 22009 mIsPending = false; 22010 } 22011 } 22012 22013 /** 22014 * <p> 22015 * This class represents a delegate that can be registered in a {@link View} 22016 * to enhance accessibility support via composition rather via inheritance. 22017 * It is specifically targeted to widget developers that extend basic View 22018 * classes i.e. classes in package android.view, that would like their 22019 * applications to be backwards compatible. 22020 * </p> 22021 * <div class="special reference"> 22022 * <h3>Developer Guides</h3> 22023 * <p>For more information about making applications accessible, read the 22024 * <a href="{@docRoot}guide/topics/ui/accessibility/index.html">Accessibility</a> 22025 * developer guide.</p> 22026 * </div> 22027 * <p> 22028 * A scenario in which a developer would like to use an accessibility delegate 22029 * is overriding a method introduced in a later API version then the minimal API 22030 * version supported by the application. For example, the method 22031 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} is not available 22032 * in API version 4 when the accessibility APIs were first introduced. If a 22033 * developer would like his application to run on API version 4 devices (assuming 22034 * all other APIs used by the application are version 4 or lower) and take advantage 22035 * of this method, instead of overriding the method which would break the application's 22036 * backwards compatibility, he can override the corresponding method in this 22037 * delegate and register the delegate in the target View if the API version of 22038 * the system is high enough i.e. the API version is same or higher to the API 22039 * version that introduced 22040 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)}. 22041 * </p> 22042 * <p> 22043 * Here is an example implementation: 22044 * </p> 22045 * <code><pre><p> 22046 * if (Build.VERSION.SDK_INT >= 14) { 22047 * // If the API version is equal of higher than the version in 22048 * // which onInitializeAccessibilityNodeInfo was introduced we 22049 * // register a delegate with a customized implementation. 22050 * View view = findViewById(R.id.view_id); 22051 * view.setAccessibilityDelegate(new AccessibilityDelegate() { 22052 * public void onInitializeAccessibilityNodeInfo(View host, 22053 * AccessibilityNodeInfo info) { 22054 * // Let the default implementation populate the info. 22055 * super.onInitializeAccessibilityNodeInfo(host, info); 22056 * // Set some other information. 22057 * info.setEnabled(host.isEnabled()); 22058 * } 22059 * }); 22060 * } 22061 * </code></pre></p> 22062 * <p> 22063 * This delegate contains methods that correspond to the accessibility methods 22064 * in View. If a delegate has been specified the implementation in View hands 22065 * off handling to the corresponding method in this delegate. The default 22066 * implementation the delegate methods behaves exactly as the corresponding 22067 * method in View for the case of no accessibility delegate been set. Hence, 22068 * to customize the behavior of a View method, clients can override only the 22069 * corresponding delegate method without altering the behavior of the rest 22070 * accessibility related methods of the host view. 22071 * </p> 22072 */ 22073 public static class AccessibilityDelegate { 22074 22075 /** 22076 * Sends an accessibility event of the given type. If accessibility is not 22077 * enabled this method has no effect. 22078 * <p> 22079 * The default implementation behaves as {@link View#sendAccessibilityEvent(int) 22080 * View#sendAccessibilityEvent(int)} for the case of no accessibility delegate 22081 * been set. 22082 * </p> 22083 * 22084 * @param host The View hosting the delegate. 22085 * @param eventType The type of the event to send. 22086 * 22087 * @see View#sendAccessibilityEvent(int) View#sendAccessibilityEvent(int) 22088 */ 22089 public void sendAccessibilityEvent(View host, int eventType) { 22090 host.sendAccessibilityEventInternal(eventType); 22091 } 22092 22093 /** 22094 * Performs the specified accessibility action on the view. For 22095 * possible accessibility actions look at {@link AccessibilityNodeInfo}. 22096 * <p> 22097 * The default implementation behaves as 22098 * {@link View#performAccessibilityAction(int, Bundle) 22099 * View#performAccessibilityAction(int, Bundle)} for the case of 22100 * no accessibility delegate been set. 22101 * </p> 22102 * 22103 * @param action The action to perform. 22104 * @return Whether the action was performed. 22105 * 22106 * @see View#performAccessibilityAction(int, Bundle) 22107 * View#performAccessibilityAction(int, Bundle) 22108 */ 22109 public boolean performAccessibilityAction(View host, int action, Bundle args) { 22110 return host.performAccessibilityActionInternal(action, args); 22111 } 22112 22113 /** 22114 * Sends an accessibility event. This method behaves exactly as 22115 * {@link #sendAccessibilityEvent(View, int)} but takes as an argument an 22116 * empty {@link AccessibilityEvent} and does not perform a check whether 22117 * accessibility is enabled. 22118 * <p> 22119 * The default implementation behaves as 22120 * {@link View#sendAccessibilityEventUnchecked(AccessibilityEvent) 22121 * View#sendAccessibilityEventUnchecked(AccessibilityEvent)} for 22122 * the case of no accessibility delegate been set. 22123 * </p> 22124 * 22125 * @param host The View hosting the delegate. 22126 * @param event The event to send. 22127 * 22128 * @see View#sendAccessibilityEventUnchecked(AccessibilityEvent) 22129 * View#sendAccessibilityEventUnchecked(AccessibilityEvent) 22130 */ 22131 public void sendAccessibilityEventUnchecked(View host, AccessibilityEvent event) { 22132 host.sendAccessibilityEventUncheckedInternal(event); 22133 } 22134 22135 /** 22136 * Dispatches an {@link AccessibilityEvent} to the host {@link View} first and then 22137 * to its children for adding their text content to the event. 22138 * <p> 22139 * The default implementation behaves as 22140 * {@link View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 22141 * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent)} for 22142 * the case of no accessibility delegate been set. 22143 * </p> 22144 * 22145 * @param host The View hosting the delegate. 22146 * @param event The event. 22147 * @return True if the event population was completed. 22148 * 22149 * @see View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 22150 * View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 22151 */ 22152 public boolean dispatchPopulateAccessibilityEvent(View host, AccessibilityEvent event) { 22153 return host.dispatchPopulateAccessibilityEventInternal(event); 22154 } 22155 22156 /** 22157 * Gives a chance to the host View to populate the accessibility event with its 22158 * text content. 22159 * <p> 22160 * The default implementation behaves as 22161 * {@link View#onPopulateAccessibilityEvent(AccessibilityEvent) 22162 * View#onPopulateAccessibilityEvent(AccessibilityEvent)} for 22163 * the case of no accessibility delegate been set. 22164 * </p> 22165 * 22166 * @param host The View hosting the delegate. 22167 * @param event The accessibility event which to populate. 22168 * 22169 * @see View#onPopulateAccessibilityEvent(AccessibilityEvent) 22170 * View#onPopulateAccessibilityEvent(AccessibilityEvent) 22171 */ 22172 public void onPopulateAccessibilityEvent(View host, AccessibilityEvent event) { 22173 host.onPopulateAccessibilityEventInternal(event); 22174 } 22175 22176 /** 22177 * Initializes an {@link AccessibilityEvent} with information about the 22178 * the host View which is the event source. 22179 * <p> 22180 * The default implementation behaves as 22181 * {@link View#onInitializeAccessibilityEvent(AccessibilityEvent) 22182 * View#onInitializeAccessibilityEvent(AccessibilityEvent)} for 22183 * the case of no accessibility delegate been set. 22184 * </p> 22185 * 22186 * @param host The View hosting the delegate. 22187 * @param event The event to initialize. 22188 * 22189 * @see View#onInitializeAccessibilityEvent(AccessibilityEvent) 22190 * View#onInitializeAccessibilityEvent(AccessibilityEvent) 22191 */ 22192 public void onInitializeAccessibilityEvent(View host, AccessibilityEvent event) { 22193 host.onInitializeAccessibilityEventInternal(event); 22194 } 22195 22196 /** 22197 * Initializes an {@link AccessibilityNodeInfo} with information about the host view. 22198 * <p> 22199 * The default implementation behaves as 22200 * {@link View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 22201 * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} for 22202 * the case of no accessibility delegate been set. 22203 * </p> 22204 * 22205 * @param host The View hosting the delegate. 22206 * @param info The instance to initialize. 22207 * 22208 * @see View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 22209 * View#onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 22210 */ 22211 public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) { 22212 host.onInitializeAccessibilityNodeInfoInternal(info); 22213 } 22214 22215 /** 22216 * Called when a child of the host View has requested sending an 22217 * {@link AccessibilityEvent} and gives an opportunity to the parent (the host) 22218 * to augment the event. 22219 * <p> 22220 * The default implementation behaves as 22221 * {@link ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 22222 * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent)} for 22223 * the case of no accessibility delegate been set. 22224 * </p> 22225 * 22226 * @param host The View hosting the delegate. 22227 * @param child The child which requests sending the event. 22228 * @param event The event to be sent. 22229 * @return True if the event should be sent 22230 * 22231 * @see ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 22232 * ViewGroup#onRequestSendAccessibilityEvent(View, AccessibilityEvent) 22233 */ 22234 public boolean onRequestSendAccessibilityEvent(ViewGroup host, View child, 22235 AccessibilityEvent event) { 22236 return host.onRequestSendAccessibilityEventInternal(child, event); 22237 } 22238 22239 /** 22240 * Gets the provider for managing a virtual view hierarchy rooted at this View 22241 * and reported to {@link android.accessibilityservice.AccessibilityService}s 22242 * that explore the window content. 22243 * <p> 22244 * The default implementation behaves as 22245 * {@link View#getAccessibilityNodeProvider() View#getAccessibilityNodeProvider()} for 22246 * the case of no accessibility delegate been set. 22247 * </p> 22248 * 22249 * @return The provider. 22250 * 22251 * @see AccessibilityNodeProvider 22252 */ 22253 public AccessibilityNodeProvider getAccessibilityNodeProvider(View host) { 22254 return null; 22255 } 22256 22257 /** 22258 * Returns an {@link AccessibilityNodeInfo} representing the host view from the 22259 * point of view of an {@link android.accessibilityservice.AccessibilityService}. 22260 * This method is responsible for obtaining an accessibility node info from a 22261 * pool of reusable instances and calling 22262 * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on the host 22263 * view to initialize the former. 22264 * <p> 22265 * <strong>Note:</strong> The client is responsible for recycling the obtained 22266 * instance by calling {@link AccessibilityNodeInfo#recycle()} to minimize object 22267 * creation. 22268 * </p> 22269 * <p> 22270 * The default implementation behaves as 22271 * {@link View#createAccessibilityNodeInfo() View#createAccessibilityNodeInfo()} for 22272 * the case of no accessibility delegate been set. 22273 * </p> 22274 * @return A populated {@link AccessibilityNodeInfo}. 22275 * 22276 * @see AccessibilityNodeInfo 22277 * 22278 * @hide 22279 */ 22280 public AccessibilityNodeInfo createAccessibilityNodeInfo(View host) { 22281 return host.createAccessibilityNodeInfoInternal(); 22282 } 22283 } 22284 22285 private class MatchIdPredicate implements Predicate<View> { 22286 public int mId; 22287 22288 @Override 22289 public boolean apply(View view) { 22290 return (view.mID == mId); 22291 } 22292 } 22293 22294 private class MatchLabelForPredicate implements Predicate<View> { 22295 private int mLabeledId; 22296 22297 @Override 22298 public boolean apply(View view) { 22299 return (view.mLabelForId == mLabeledId); 22300 } 22301 } 22302 22303 private class SendViewStateChangedAccessibilityEvent implements Runnable { 22304 private int mChangeTypes = 0; 22305 private boolean mPosted; 22306 private boolean mPostedWithDelay; 22307 private long mLastEventTimeMillis; 22308 22309 @Override 22310 public void run() { 22311 mPosted = false; 22312 mPostedWithDelay = false; 22313 mLastEventTimeMillis = SystemClock.uptimeMillis(); 22314 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 22315 final AccessibilityEvent event = AccessibilityEvent.obtain(); 22316 event.setEventType(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED); 22317 event.setContentChangeTypes(mChangeTypes); 22318 sendAccessibilityEventUnchecked(event); 22319 } 22320 mChangeTypes = 0; 22321 } 22322 22323 public void runOrPost(int changeType) { 22324 mChangeTypes |= changeType; 22325 22326 // If this is a live region or the child of a live region, collect 22327 // all events from this frame and send them on the next frame. 22328 if (inLiveRegion()) { 22329 // If we're already posted with a delay, remove that. 22330 if (mPostedWithDelay) { 22331 removeCallbacks(this); 22332 mPostedWithDelay = false; 22333 } 22334 // Only post if we're not already posted. 22335 if (!mPosted) { 22336 post(this); 22337 mPosted = true; 22338 } 22339 return; 22340 } 22341 22342 if (mPosted) { 22343 return; 22344 } 22345 22346 final long timeSinceLastMillis = SystemClock.uptimeMillis() - mLastEventTimeMillis; 22347 final long minEventIntevalMillis = 22348 ViewConfiguration.getSendRecurringAccessibilityEventsInterval(); 22349 if (timeSinceLastMillis >= minEventIntevalMillis) { 22350 removeCallbacks(this); 22351 run(); 22352 } else { 22353 postDelayed(this, minEventIntevalMillis - timeSinceLastMillis); 22354 mPostedWithDelay = true; 22355 } 22356 } 22357 } 22358 22359 private boolean inLiveRegion() { 22360 if (getAccessibilityLiveRegion() != View.ACCESSIBILITY_LIVE_REGION_NONE) { 22361 return true; 22362 } 22363 22364 ViewParent parent = getParent(); 22365 while (parent instanceof View) { 22366 if (((View) parent).getAccessibilityLiveRegion() 22367 != View.ACCESSIBILITY_LIVE_REGION_NONE) { 22368 return true; 22369 } 22370 parent = parent.getParent(); 22371 } 22372 22373 return false; 22374 } 22375 22376 /** 22377 * Dump all private flags in readable format, useful for documentation and 22378 * sanity checking. 22379 */ 22380 private static void dumpFlags() { 22381 final HashMap<String, String> found = Maps.newHashMap(); 22382 try { 22383 for (Field field : View.class.getDeclaredFields()) { 22384 final int modifiers = field.getModifiers(); 22385 if (Modifier.isStatic(modifiers) && Modifier.isFinal(modifiers)) { 22386 if (field.getType().equals(int.class)) { 22387 final int value = field.getInt(null); 22388 dumpFlag(found, field.getName(), value); 22389 } else if (field.getType().equals(int[].class)) { 22390 final int[] values = (int[]) field.get(null); 22391 for (int i = 0; i < values.length; i++) { 22392 dumpFlag(found, field.getName() + "[" + i + "]", values[i]); 22393 } 22394 } 22395 } 22396 } 22397 } catch (IllegalAccessException e) { 22398 throw new RuntimeException(e); 22399 } 22400 22401 final ArrayList<String> keys = Lists.newArrayList(); 22402 keys.addAll(found.keySet()); 22403 Collections.sort(keys); 22404 for (String key : keys) { 22405 Log.d(VIEW_LOG_TAG, found.get(key)); 22406 } 22407 } 22408 22409 private static void dumpFlag(HashMap<String, String> found, String name, int value) { 22410 // Sort flags by prefix, then by bits, always keeping unique keys 22411 final String bits = String.format("%32s", Integer.toBinaryString(value)).replace('0', ' '); 22412 final int prefix = name.indexOf('_'); 22413 final String key = (prefix > 0 ? name.substring(0, prefix) : name) + bits + name; 22414 final String output = bits + " " + name; 22415 found.put(key, output); 22416 } 22417 22418 /** {@hide} */ 22419 public void encode(@NonNull ViewHierarchyEncoder stream) { 22420 stream.beginObject(this); 22421 encodeProperties(stream); 22422 stream.endObject(); 22423 } 22424 22425 /** {@hide} */ 22426 @CallSuper 22427 protected void encodeProperties(@NonNull ViewHierarchyEncoder stream) { 22428 Object resolveId = ViewDebug.resolveId(getContext(), mID); 22429 if (resolveId instanceof String) { 22430 stream.addProperty("id", (String) resolveId); 22431 } else { 22432 stream.addProperty("id", mID); 22433 } 22434 22435 stream.addProperty("misc:transformation.alpha", 22436 mTransformationInfo != null ? mTransformationInfo.mAlpha : 0); 22437 stream.addProperty("misc:transitionName", getTransitionName()); 22438 22439 // layout 22440 stream.addProperty("layout:left", mLeft); 22441 stream.addProperty("layout:right", mRight); 22442 stream.addProperty("layout:top", mTop); 22443 stream.addProperty("layout:bottom", mBottom); 22444 stream.addProperty("layout:width", getWidth()); 22445 stream.addProperty("layout:height", getHeight()); 22446 stream.addProperty("layout:layoutDirection", getLayoutDirection()); 22447 stream.addProperty("layout:layoutRtl", isLayoutRtl()); 22448 stream.addProperty("layout:hasTransientState", hasTransientState()); 22449 stream.addProperty("layout:baseline", getBaseline()); 22450 22451 // layout params 22452 ViewGroup.LayoutParams layoutParams = getLayoutParams(); 22453 if (layoutParams != null) { 22454 stream.addPropertyKey("layoutParams"); 22455 layoutParams.encode(stream); 22456 } 22457 22458 // scrolling 22459 stream.addProperty("scrolling:scrollX", mScrollX); 22460 stream.addProperty("scrolling:scrollY", mScrollY); 22461 22462 // padding 22463 stream.addProperty("padding:paddingLeft", mPaddingLeft); 22464 stream.addProperty("padding:paddingRight", mPaddingRight); 22465 stream.addProperty("padding:paddingTop", mPaddingTop); 22466 stream.addProperty("padding:paddingBottom", mPaddingBottom); 22467 stream.addProperty("padding:userPaddingRight", mUserPaddingRight); 22468 stream.addProperty("padding:userPaddingLeft", mUserPaddingLeft); 22469 stream.addProperty("padding:userPaddingBottom", mUserPaddingBottom); 22470 stream.addProperty("padding:userPaddingStart", mUserPaddingStart); 22471 stream.addProperty("padding:userPaddingEnd", mUserPaddingEnd); 22472 22473 // measurement 22474 stream.addProperty("measurement:minHeight", mMinHeight); 22475 stream.addProperty("measurement:minWidth", mMinWidth); 22476 stream.addProperty("measurement:measuredWidth", mMeasuredWidth); 22477 stream.addProperty("measurement:measuredHeight", mMeasuredHeight); 22478 22479 // drawing 22480 stream.addProperty("drawing:elevation", getElevation()); 22481 stream.addProperty("drawing:translationX", getTranslationX()); 22482 stream.addProperty("drawing:translationY", getTranslationY()); 22483 stream.addProperty("drawing:translationZ", getTranslationZ()); 22484 stream.addProperty("drawing:rotation", getRotation()); 22485 stream.addProperty("drawing:rotationX", getRotationX()); 22486 stream.addProperty("drawing:rotationY", getRotationY()); 22487 stream.addProperty("drawing:scaleX", getScaleX()); 22488 stream.addProperty("drawing:scaleY", getScaleY()); 22489 stream.addProperty("drawing:pivotX", getPivotX()); 22490 stream.addProperty("drawing:pivotY", getPivotY()); 22491 stream.addProperty("drawing:opaque", isOpaque()); 22492 stream.addProperty("drawing:alpha", getAlpha()); 22493 stream.addProperty("drawing:transitionAlpha", getTransitionAlpha()); 22494 stream.addProperty("drawing:shadow", hasShadow()); 22495 stream.addProperty("drawing:solidColor", getSolidColor()); 22496 stream.addProperty("drawing:layerType", mLayerType); 22497 stream.addProperty("drawing:willNotDraw", willNotDraw()); 22498 stream.addProperty("drawing:hardwareAccelerated", isHardwareAccelerated()); 22499 stream.addProperty("drawing:willNotCacheDrawing", willNotCacheDrawing()); 22500 stream.addProperty("drawing:drawingCacheEnabled", isDrawingCacheEnabled()); 22501 stream.addProperty("drawing:overlappingRendering", hasOverlappingRendering()); 22502 22503 // focus 22504 stream.addProperty("focus:hasFocus", hasFocus()); 22505 stream.addProperty("focus:isFocused", isFocused()); 22506 stream.addProperty("focus:isFocusable", isFocusable()); 22507 stream.addProperty("focus:isFocusableInTouchMode", isFocusableInTouchMode()); 22508 22509 stream.addProperty("misc:clickable", isClickable()); 22510 stream.addProperty("misc:pressed", isPressed()); 22511 stream.addProperty("misc:selected", isSelected()); 22512 stream.addProperty("misc:touchMode", isInTouchMode()); 22513 stream.addProperty("misc:hovered", isHovered()); 22514 stream.addProperty("misc:activated", isActivated()); 22515 22516 stream.addProperty("misc:visibility", getVisibility()); 22517 stream.addProperty("misc:fitsSystemWindows", getFitsSystemWindows()); 22518 stream.addProperty("misc:filterTouchesWhenObscured", getFilterTouchesWhenObscured()); 22519 22520 stream.addProperty("misc:enabled", isEnabled()); 22521 stream.addProperty("misc:soundEffectsEnabled", isSoundEffectsEnabled()); 22522 stream.addProperty("misc:hapticFeedbackEnabled", isHapticFeedbackEnabled()); 22523 22524 // theme attributes 22525 Resources.Theme theme = getContext().getTheme(); 22526 if (theme != null) { 22527 stream.addPropertyKey("theme"); 22528 theme.encode(stream); 22529 } 22530 22531 // view attribute information 22532 int n = mAttributes != null ? mAttributes.length : 0; 22533 stream.addProperty("meta:__attrCount__", n/2); 22534 for (int i = 0; i < n; i += 2) { 22535 stream.addProperty("meta:__attr__" + mAttributes[i], mAttributes[i+1]); 22536 } 22537 22538 stream.addProperty("misc:scrollBarStyle", getScrollBarStyle()); 22539 22540 // text 22541 stream.addProperty("text:textDirection", getTextDirection()); 22542 stream.addProperty("text:textAlignment", getTextAlignment()); 22543 22544 // accessibility 22545 CharSequence contentDescription = getContentDescription(); 22546 stream.addProperty("accessibility:contentDescription", 22547 contentDescription == null ? "" : contentDescription.toString()); 22548 stream.addProperty("accessibility:labelFor", getLabelFor()); 22549 stream.addProperty("accessibility:importantForAccessibility", getImportantForAccessibility()); 22550 } 22551 } 22552
