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.IntRange; 28 import android.annotation.LayoutRes; 29 import android.annotation.NonNull; 30 import android.annotation.Nullable; 31 import android.annotation.Size; 32 import android.annotation.UiThread; 33 import android.content.ClipData; 34 import android.content.Context; 35 import android.content.ContextWrapper; 36 import android.content.Intent; 37 import android.content.res.ColorStateList; 38 import android.content.res.Configuration; 39 import android.content.res.Resources; 40 import android.content.res.TypedArray; 41 import android.graphics.Bitmap; 42 import android.graphics.Canvas; 43 import android.graphics.Insets; 44 import android.graphics.Interpolator; 45 import android.graphics.LinearGradient; 46 import android.graphics.Matrix; 47 import android.graphics.Outline; 48 import android.graphics.Paint; 49 import android.graphics.PixelFormat; 50 import android.graphics.Point; 51 import android.graphics.PorterDuff; 52 import android.graphics.PorterDuffXfermode; 53 import android.graphics.Rect; 54 import android.graphics.RectF; 55 import android.graphics.Region; 56 import android.graphics.Shader; 57 import android.graphics.drawable.ColorDrawable; 58 import android.graphics.drawable.Drawable; 59 import android.hardware.display.DisplayManagerGlobal; 60 import android.os.Build.VERSION_CODES; 61 import android.os.Bundle; 62 import android.os.Handler; 63 import android.os.IBinder; 64 import android.os.Parcel; 65 import android.os.Parcelable; 66 import android.os.RemoteException; 67 import android.os.SystemClock; 68 import android.os.SystemProperties; 69 import android.os.Trace; 70 import android.text.TextUtils; 71 import android.util.AttributeSet; 72 import android.util.FloatProperty; 73 import android.util.LayoutDirection; 74 import android.util.Log; 75 import android.util.LongSparseLongArray; 76 import android.util.Pools.SynchronizedPool; 77 import android.util.Property; 78 import android.util.SparseArray; 79 import android.util.StateSet; 80 import android.util.SuperNotCalledException; 81 import android.util.TypedValue; 82 import android.view.ContextMenu.ContextMenuInfo; 83 import android.view.AccessibilityIterators.CharacterTextSegmentIterator; 84 import android.view.AccessibilityIterators.ParagraphTextSegmentIterator; 85 import android.view.AccessibilityIterators.TextSegmentIterator; 86 import android.view.AccessibilityIterators.WordTextSegmentIterator; 87 import android.view.accessibility.AccessibilityEvent; 88 import android.view.accessibility.AccessibilityEventSource; 89 import android.view.accessibility.AccessibilityManager; 90 import android.view.accessibility.AccessibilityNodeInfo; 91 import android.view.accessibility.AccessibilityNodeInfo.AccessibilityAction; 92 import android.view.accessibility.AccessibilityNodeProvider; 93 import android.view.animation.Animation; 94 import android.view.animation.AnimationUtils; 95 import android.view.animation.Transformation; 96 import android.view.inputmethod.EditorInfo; 97 import android.view.inputmethod.InputConnection; 98 import android.view.inputmethod.InputMethodManager; 99 import android.widget.Checkable; 100 import android.widget.FrameLayout; 101 import android.widget.ScrollBarDrawable; 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.android.internal.widget.ScrollBarUtils; 109 import com.google.android.collect.Lists; 110 import com.google.android.collect.Maps; 111 112 import java.lang.NullPointerException; 113 import java.lang.annotation.Retention; 114 import java.lang.annotation.RetentionPolicy; 115 import java.lang.ref.WeakReference; 116 import java.lang.reflect.Field; 117 import java.lang.reflect.InvocationTargetException; 118 import java.lang.reflect.Method; 119 import java.lang.reflect.Modifier; 120 import java.util.ArrayList; 121 import java.util.Arrays; 122 import java.util.Collections; 123 import java.util.HashMap; 124 import java.util.List; 125 import java.util.Locale; 126 import java.util.Map; 127 import java.util.concurrent.CopyOnWriteArrayList; 128 import java.util.concurrent.atomic.AtomicInteger; 129 130 /** 131 * <p> 132 * This class represents the basic building block for user interface components. A View 133 * occupies a rectangular area on the screen and is responsible for drawing and 134 * event handling. View is the base class for <em>widgets</em>, which are 135 * used to create interactive UI components (buttons, text fields, etc.). The 136 * {@link android.view.ViewGroup} subclass is the base class for <em>layouts</em>, which 137 * are invisible containers that hold other Views (or other ViewGroups) and define 138 * their layout properties. 139 * </p> 140 * 141 * <div class="special reference"> 142 * <h3>Developer Guides</h3> 143 * <p>For information about using this class to develop your application's user interface, 144 * read the <a href="{@docRoot}guide/topics/ui/index.html">User Interface</a> developer guide. 145 * </div> 146 * 147 * <a name="Using"></a> 148 * <h3>Using Views</h3> 149 * <p> 150 * All of the views in a window are arranged in a single tree. You can add views 151 * either from code or by specifying a tree of views in one or more XML layout 152 * files. There are many specialized subclasses of views that act as controls or 153 * are capable of displaying text, images, or other content. 154 * </p> 155 * <p> 156 * Once you have created a tree of views, there are typically a few types of 157 * common operations you may wish to perform: 158 * <ul> 159 * <li><strong>Set properties:</strong> for example setting the text of a 160 * {@link android.widget.TextView}. The available properties and the methods 161 * that set them will vary among the different subclasses of views. Note that 162 * properties that are known at build time can be set in the XML layout 163 * files.</li> 164 * <li><strong>Set focus:</strong> The framework will handle moving focus in 165 * response to user input. To force focus to a specific view, call 166 * {@link #requestFocus}.</li> 167 * <li><strong>Set up listeners:</strong> Views allow clients to set listeners 168 * that will be notified when something interesting happens to the view. For 169 * example, all views will let you set a listener to be notified when the view 170 * gains or loses focus. You can register such a listener using 171 * {@link #setOnFocusChangeListener(android.view.View.OnFocusChangeListener)}. 172 * Other view subclasses offer more specialized listeners. For example, a Button 173 * exposes a listener to notify clients when the button is clicked.</li> 174 * <li><strong>Set visibility:</strong> You can hide or show views using 175 * {@link #setVisibility(int)}.</li> 176 * </ul> 177 * </p> 178 * <p><em> 179 * Note: The Android framework is responsible for measuring, laying out and 180 * drawing views. You should not call methods that perform these actions on 181 * views yourself unless you are actually implementing a 182 * {@link android.view.ViewGroup}. 183 * </em></p> 184 * 185 * <a name="Lifecycle"></a> 186 * <h3>Implementing a Custom View</h3> 187 * 188 * <p> 189 * To implement a custom view, you will usually begin by providing overrides for 190 * some of the standard methods that the framework calls on all views. You do 191 * not need to override all of these methods. In fact, you can start by just 192 * overriding {@link #onDraw(android.graphics.Canvas)}. 193 * <table border="2" width="85%" align="center" cellpadding="5"> 194 * <thead> 195 * <tr><th>Category</th> <th>Methods</th> <th>Description</th></tr> 196 * </thead> 197 * 198 * <tbody> 199 * <tr> 200 * <td rowspan="2">Creation</td> 201 * <td>Constructors</td> 202 * <td>There is a form of the constructor that are called when the view 203 * is created from code and a form that is called when the view is 204 * inflated from a layout file. The second form should parse and apply 205 * any attributes defined in the layout file. 206 * </td> 207 * </tr> 208 * <tr> 209 * <td><code>{@link #onFinishInflate()}</code></td> 210 * <td>Called after a view and all of its children has been inflated 211 * from XML.</td> 212 * </tr> 213 * 214 * <tr> 215 * <td rowspan="3">Layout</td> 216 * <td><code>{@link #onMeasure(int, int)}</code></td> 217 * <td>Called to determine the size requirements for this view and all 218 * of its children. 219 * </td> 220 * </tr> 221 * <tr> 222 * <td><code>{@link #onLayout(boolean, int, int, int, int)}</code></td> 223 * <td>Called when this view should assign a size and position to all 224 * of its children. 225 * </td> 226 * </tr> 227 * <tr> 228 * <td><code>{@link #onSizeChanged(int, int, int, int)}</code></td> 229 * <td>Called when the size of this view has changed. 230 * </td> 231 * </tr> 232 * 233 * <tr> 234 * <td>Drawing</td> 235 * <td><code>{@link #onDraw(android.graphics.Canvas)}</code></td> 236 * <td>Called when the view should render its content. 237 * </td> 238 * </tr> 239 * 240 * <tr> 241 * <td rowspan="4">Event processing</td> 242 * <td><code>{@link #onKeyDown(int, KeyEvent)}</code></td> 243 * <td>Called when a new hardware key event occurs. 244 * </td> 245 * </tr> 246 * <tr> 247 * <td><code>{@link #onKeyUp(int, KeyEvent)}</code></td> 248 * <td>Called when a hardware key up event occurs. 249 * </td> 250 * </tr> 251 * <tr> 252 * <td><code>{@link #onTrackballEvent(MotionEvent)}</code></td> 253 * <td>Called when a trackball motion event occurs. 254 * </td> 255 * </tr> 256 * <tr> 257 * <td><code>{@link #onTouchEvent(MotionEvent)}</code></td> 258 * <td>Called when a touch screen motion event occurs. 259 * </td> 260 * </tr> 261 * 262 * <tr> 263 * <td rowspan="2">Focus</td> 264 * <td><code>{@link #onFocusChanged(boolean, int, android.graphics.Rect)}</code></td> 265 * <td>Called when the view gains or loses focus. 266 * </td> 267 * </tr> 268 * 269 * <tr> 270 * <td><code>{@link #onWindowFocusChanged(boolean)}</code></td> 271 * <td>Called when the window containing the view gains or loses focus. 272 * </td> 273 * </tr> 274 * 275 * <tr> 276 * <td rowspan="3">Attaching</td> 277 * <td><code>{@link #onAttachedToWindow()}</code></td> 278 * <td>Called when the view is attached to a window. 279 * </td> 280 * </tr> 281 * 282 * <tr> 283 * <td><code>{@link #onDetachedFromWindow}</code></td> 284 * <td>Called when the view is detached from its window. 285 * </td> 286 * </tr> 287 * 288 * <tr> 289 * <td><code>{@link #onWindowVisibilityChanged(int)}</code></td> 290 * <td>Called when the visibility of the window containing the view 291 * has changed. 292 * </td> 293 * </tr> 294 * </tbody> 295 * 296 * </table> 297 * </p> 298 * 299 * <a name="IDs"></a> 300 * <h3>IDs</h3> 301 * Views may have an integer id associated with them. These ids are typically 302 * assigned in the layout XML files, and are used to find specific views within 303 * the view tree. A common pattern is to: 304 * <ul> 305 * <li>Define a Button in the layout file and assign it a unique ID. 306 * <pre> 307 * <Button 308 * android:id="@+id/my_button" 309 * android:layout_width="wrap_content" 310 * android:layout_height="wrap_content" 311 * android:text="@string/my_button_text"/> 312 * </pre></li> 313 * <li>From the onCreate method of an Activity, find the Button 314 * <pre class="prettyprint"> 315 * Button myButton = (Button) findViewById(R.id.my_button); 316 * </pre></li> 317 * </ul> 318 * <p> 319 * View IDs need not be unique throughout the tree, but it is good practice to 320 * ensure that they are at least unique within the part of the tree you are 321 * searching. 322 * </p> 323 * 324 * <a name="Position"></a> 325 * <h3>Position</h3> 326 * <p> 327 * The geometry of a view is that of a rectangle. A view has a location, 328 * expressed as a pair of <em>left</em> and <em>top</em> coordinates, and 329 * two dimensions, expressed as a width and a height. The unit for location 330 * and dimensions is the pixel. 331 * </p> 332 * 333 * <p> 334 * It is possible to retrieve the location of a view by invoking the methods 335 * {@link #getLeft()} and {@link #getTop()}. The former returns the left, or X, 336 * coordinate of the rectangle representing the view. The latter returns the 337 * top, or Y, coordinate of the rectangle representing the view. These methods 338 * both return the location of the view relative to its parent. For instance, 339 * when getLeft() returns 20, that means the view is located 20 pixels to the 340 * right of the left edge of its direct parent. 341 * </p> 342 * 343 * <p> 344 * In addition, several convenience methods are offered to avoid unnecessary 345 * computations, namely {@link #getRight()} and {@link #getBottom()}. 346 * These methods return the coordinates of the right and bottom edges of the 347 * rectangle representing the view. For instance, calling {@link #getRight()} 348 * is similar to the following computation: <code>getLeft() + getWidth()</code> 349 * (see <a href="#SizePaddingMargins">Size</a> for more information about the width.) 350 * </p> 351 * 352 * <a name="SizePaddingMargins"></a> 353 * <h3>Size, padding and margins</h3> 354 * <p> 355 * The size of a view is expressed with a width and a height. A view actually 356 * possess two pairs of width and height values. 357 * </p> 358 * 359 * <p> 360 * The first pair is known as <em>measured width</em> and 361 * <em>measured height</em>. These dimensions define how big a view wants to be 362 * within its parent (see <a href="#Layout">Layout</a> for more details.) The 363 * measured dimensions can be obtained by calling {@link #getMeasuredWidth()} 364 * and {@link #getMeasuredHeight()}. 365 * </p> 366 * 367 * <p> 368 * The second pair is simply known as <em>width</em> and <em>height</em>, or 369 * sometimes <em>drawing width</em> and <em>drawing height</em>. These 370 * dimensions define the actual size of the view on screen, at drawing time and 371 * after layout. These values may, but do not have to, be different from the 372 * measured width and height. The width and height can be obtained by calling 373 * {@link #getWidth()} and {@link #getHeight()}. 374 * </p> 375 * 376 * <p> 377 * To measure its dimensions, a view takes into account its padding. The padding 378 * is expressed in pixels for the left, top, right and bottom parts of the view. 379 * Padding can be used to offset the content of the view by a specific amount of 380 * pixels. For instance, a left padding of 2 will push the view's content by 381 * 2 pixels to the right of the left edge. Padding can be set using the 382 * {@link #setPadding(int, int, int, int)} or {@link #setPaddingRelative(int, int, int, int)} 383 * method and queried by calling {@link #getPaddingLeft()}, {@link #getPaddingTop()}, 384 * {@link #getPaddingRight()}, {@link #getPaddingBottom()}, {@link #getPaddingStart()}, 385 * {@link #getPaddingEnd()}. 386 * </p> 387 * 388 * <p> 389 * Even though a view can define a padding, it does not provide any support for 390 * margins. However, view groups provide such a support. Refer to 391 * {@link android.view.ViewGroup} and 392 * {@link android.view.ViewGroup.MarginLayoutParams} for further information. 393 * </p> 394 * 395 * <a name="Layout"></a> 396 * <h3>Layout</h3> 397 * <p> 398 * Layout is a two pass process: a measure pass and a layout pass. The measuring 399 * pass is implemented in {@link #measure(int, int)} and is a top-down traversal 400 * of the view tree. Each view pushes dimension specifications down the tree 401 * during the recursion. At the end of the measure pass, every view has stored 402 * its measurements. The second pass happens in 403 * {@link #layout(int,int,int,int)} and is also top-down. During 404 * this pass each parent is responsible for positioning all of its children 405 * using the sizes computed in the measure pass. 406 * </p> 407 * 408 * <p> 409 * When a view's measure() method returns, its {@link #getMeasuredWidth()} and 410 * {@link #getMeasuredHeight()} values must be set, along with those for all of 411 * that view's descendants. A view's measured width and measured height values 412 * must respect the constraints imposed by the view's parents. This guarantees 413 * that at the end of the measure pass, all parents accept all of their 414 * children's measurements. A parent view may call measure() more than once on 415 * its children. For example, the parent may measure each child once with 416 * unspecified dimensions to find out how big they want to be, then call 417 * measure() on them again with actual numbers if the sum of all the children's 418 * unconstrained sizes is too big or too small. 419 * </p> 420 * 421 * <p> 422 * The measure pass uses two classes to communicate dimensions. The 423 * {@link MeasureSpec} class is used by views to tell their parents how they 424 * want to be measured and positioned. The base LayoutParams class just 425 * describes how big the view wants to be for both width and height. For each 426 * dimension, it can specify one of: 427 * <ul> 428 * <li> an exact number 429 * <li>MATCH_PARENT, which means the view wants to be as big as its parent 430 * (minus padding) 431 * <li> WRAP_CONTENT, which means that the view wants to be just big enough to 432 * enclose its content (plus padding). 433 * </ul> 434 * There are subclasses of LayoutParams for different subclasses of ViewGroup. 435 * For example, AbsoluteLayout has its own subclass of LayoutParams which adds 436 * an X and Y value. 437 * </p> 438 * 439 * <p> 440 * MeasureSpecs are used to push requirements down the tree from parent to 441 * child. A MeasureSpec can be in one of three modes: 442 * <ul> 443 * <li>UNSPECIFIED: This is used by a parent to determine the desired dimension 444 * of a child view. For example, a LinearLayout may call measure() on its child 445 * with the height set to UNSPECIFIED and a width of EXACTLY 240 to find out how 446 * tall the child view wants to be given a width of 240 pixels. 447 * <li>EXACTLY: This is used by the parent to impose an exact size on the 448 * child. The child must use this size, and guarantee that all of its 449 * descendants will fit within this size. 450 * <li>AT_MOST: This is used by the parent to impose a maximum size on the 451 * child. The child must guarantee that it and all of its descendants will fit 452 * within this size. 453 * </ul> 454 * </p> 455 * 456 * <p> 457 * To initiate a layout, call {@link #requestLayout}. This method is typically 458 * called by a view on itself when it believes that is can no longer fit within 459 * its current bounds. 460 * </p> 461 * 462 * <a name="Drawing"></a> 463 * <h3>Drawing</h3> 464 * <p> 465 * Drawing is handled by walking the tree and recording the drawing commands of 466 * any View that needs to update. After this, the drawing commands of the 467 * entire tree are issued to screen, clipped to the newly damaged area. 468 * </p> 469 * 470 * <p> 471 * The tree is largely recorded and drawn in order, with parents drawn before 472 * (i.e., behind) their children, with siblings drawn in the order they appear 473 * in the tree. If you set a background drawable for a View, then the View will 474 * draw it before calling back to its <code>onDraw()</code> method. The child 475 * drawing order can be overridden with 476 * {@link ViewGroup#setChildrenDrawingOrderEnabled(boolean) custom child drawing order} 477 * in a ViewGroup, and with {@link #setZ(float)} custom Z values} set on Views. 478 * </p> 479 * 480 * <p> 481 * To force a view to draw, call {@link #invalidate()}. 482 * </p> 483 * 484 * <a name="EventHandlingThreading"></a> 485 * <h3>Event Handling and Threading</h3> 486 * <p> 487 * The basic cycle of a view is as follows: 488 * <ol> 489 * <li>An event comes in and is dispatched to the appropriate view. The view 490 * handles the event and notifies any listeners.</li> 491 * <li>If in the course of processing the event, the view's bounds may need 492 * to be changed, the view will call {@link #requestLayout()}.</li> 493 * <li>Similarly, if in the course of processing the event the view's appearance 494 * may need to be changed, the view will call {@link #invalidate()}.</li> 495 * <li>If either {@link #requestLayout()} or {@link #invalidate()} were called, 496 * the framework will take care of measuring, laying out, and drawing the tree 497 * as appropriate.</li> 498 * </ol> 499 * </p> 500 * 501 * <p><em>Note: The entire view tree is single threaded. You must always be on 502 * the UI thread when calling any method on any view.</em> 503 * If you are doing work on other threads and want to update the state of a view 504 * from that thread, you should use a {@link Handler}. 505 * </p> 506 * 507 * <a name="FocusHandling"></a> 508 * <h3>Focus Handling</h3> 509 * <p> 510 * The framework will handle routine focus movement in response to user input. 511 * This includes changing the focus as views are removed or hidden, or as new 512 * views become available. Views indicate their willingness to take focus 513 * through the {@link #isFocusable} method. To change whether a view can take 514 * focus, call {@link #setFocusable(boolean)}. When in touch mode (see notes below) 515 * views indicate whether they still would like focus via {@link #isFocusableInTouchMode} 516 * and can change this via {@link #setFocusableInTouchMode(boolean)}. 517 * </p> 518 * <p> 519 * Focus movement is based on an algorithm which finds the nearest neighbor in a 520 * given direction. In rare cases, the default algorithm may not match the 521 * intended behavior of the developer. In these situations, you can provide 522 * explicit overrides by using these XML attributes in the layout file: 523 * <pre> 524 * nextFocusDown 525 * nextFocusLeft 526 * nextFocusRight 527 * nextFocusUp 528 * </pre> 529 * </p> 530 * 531 * 532 * <p> 533 * To get a particular view to take focus, call {@link #requestFocus()}. 534 * </p> 535 * 536 * <a name="TouchMode"></a> 537 * <h3>Touch Mode</h3> 538 * <p> 539 * When a user is navigating a user interface via directional keys such as a D-pad, it is 540 * necessary to give focus to actionable items such as buttons so the user can see 541 * what will take input. If the device has touch capabilities, however, and the user 542 * begins interacting with the interface by touching it, it is no longer necessary to 543 * always highlight, or give focus to, a particular view. This motivates a mode 544 * for interaction named 'touch mode'. 545 * </p> 546 * <p> 547 * For a touch capable device, once the user touches the screen, the device 548 * will enter touch mode. From this point onward, only views for which 549 * {@link #isFocusableInTouchMode} is true will be focusable, such as text editing widgets. 550 * Other views that are touchable, like buttons, will not take focus when touched; they will 551 * only fire the on click listeners. 552 * </p> 553 * <p> 554 * Any time a user hits a directional key, such as a D-pad direction, the view device will 555 * exit touch mode, and find a view to take focus, so that the user may resume interacting 556 * with the user interface without touching the screen again. 557 * </p> 558 * <p> 559 * The touch mode state is maintained across {@link android.app.Activity}s. Call 560 * {@link #isInTouchMode} to see whether the device is currently in touch mode. 561 * </p> 562 * 563 * <a name="Scrolling"></a> 564 * <h3>Scrolling</h3> 565 * <p> 566 * The framework provides basic support for views that wish to internally 567 * scroll their content. This includes keeping track of the X and Y scroll 568 * offset as well as mechanisms for drawing scrollbars. See 569 * {@link #scrollBy(int, int)}, {@link #scrollTo(int, int)}, and 570 * {@link #awakenScrollBars()} for more details. 571 * </p> 572 * 573 * <a name="Tags"></a> 574 * <h3>Tags</h3> 575 * <p> 576 * Unlike IDs, tags are not used to identify views. Tags are essentially an 577 * extra piece of information that can be associated with a view. They are most 578 * often used as a convenience to store data related to views in the views 579 * themselves rather than by putting them in a separate structure. 580 * </p> 581 * <p> 582 * Tags may be specified with character sequence values in layout XML as either 583 * a single tag using the {@link android.R.styleable#View_tag android:tag} 584 * attribute or multiple tags using the {@code <tag>} child element: 585 * <pre> 586 * <View ... 587 * android:tag="@string/mytag_value" /> 588 * <View ...> 589 * <tag android:id="@+id/mytag" 590 * android:value="@string/mytag_value" /> 591 * </View> 592 * </pre> 593 * </p> 594 * <p> 595 * Tags may also be specified with arbitrary objects from code using 596 * {@link #setTag(Object)} or {@link #setTag(int, Object)}. 597 * </p> 598 * 599 * <a name="Themes"></a> 600 * <h3>Themes</h3> 601 * <p> 602 * By default, Views are created using the theme of the Context object supplied 603 * to their constructor; however, a different theme may be specified by using 604 * the {@link android.R.styleable#View_theme android:theme} attribute in layout 605 * XML or by passing a {@link ContextThemeWrapper} to the constructor from 606 * code. 607 * </p> 608 * <p> 609 * When the {@link android.R.styleable#View_theme android:theme} attribute is 610 * used in XML, the specified theme is applied on top of the inflation 611 * context's theme (see {@link LayoutInflater}) and used for the view itself as 612 * well as any child elements. 613 * </p> 614 * <p> 615 * In the following example, both views will be created using the Material dark 616 * color scheme; however, because an overlay theme is used which only defines a 617 * subset of attributes, the value of 618 * {@link android.R.styleable#Theme_colorAccent android:colorAccent} defined on 619 * the inflation context's theme (e.g. the Activity theme) will be preserved. 620 * <pre> 621 * <LinearLayout 622 * ... 623 * android:theme="@android:theme/ThemeOverlay.Material.Dark"> 624 * <View ...> 625 * </LinearLayout> 626 * </pre> 627 * </p> 628 * 629 * <a name="Properties"></a> 630 * <h3>Properties</h3> 631 * <p> 632 * The View class exposes an {@link #ALPHA} property, as well as several transform-related 633 * properties, such as {@link #TRANSLATION_X} and {@link #TRANSLATION_Y}. These properties are 634 * available both in the {@link Property} form as well as in similarly-named setter/getter 635 * methods (such as {@link #setAlpha(float)} for {@link #ALPHA}). These properties can 636 * be used to set persistent state associated with these rendering-related properties on the view. 637 * The properties and methods can also be used in conjunction with 638 * {@link android.animation.Animator Animator}-based animations, described more in the 639 * <a href="#Animation">Animation</a> section. 640 * </p> 641 * 642 * <a name="Animation"></a> 643 * <h3>Animation</h3> 644 * <p> 645 * Starting with Android 3.0, the preferred way of animating views is to use the 646 * {@link android.animation} package APIs. These {@link android.animation.Animator Animator}-based 647 * classes change actual properties of the View object, such as {@link #setAlpha(float) alpha} and 648 * {@link #setTranslationX(float) translationX}. This behavior is contrasted to that of the pre-3.0 649 * {@link android.view.animation.Animation Animation}-based classes, which instead animate only 650 * how the view is drawn on the display. In particular, the {@link ViewPropertyAnimator} class 651 * makes animating these View properties particularly easy and efficient. 652 * </p> 653 * <p> 654 * Alternatively, you can use the pre-3.0 animation classes to animate how Views are rendered. 655 * You can attach an {@link Animation} object to a view using 656 * {@link #setAnimation(Animation)} or 657 * {@link #startAnimation(Animation)}. The animation can alter the scale, 658 * rotation, translation and alpha of a view over time. If the animation is 659 * attached to a view that has children, the animation will affect the entire 660 * subtree rooted by that node. When an animation is started, the framework will 661 * take care of redrawing the appropriate views until the animation completes. 662 * </p> 663 * 664 * <a name="Security"></a> 665 * <h3>Security</h3> 666 * <p> 667 * Sometimes it is essential that an application be able to verify that an action 668 * is being performed with the full knowledge and consent of the user, such as 669 * granting a permission request, making a purchase or clicking on an advertisement. 670 * Unfortunately, a malicious application could try to spoof the user into 671 * performing these actions, unaware, by concealing the intended purpose of the view. 672 * As a remedy, the framework offers a touch filtering mechanism that can be used to 673 * improve the security of views that provide access to sensitive functionality. 674 * </p><p> 675 * To enable touch filtering, call {@link #setFilterTouchesWhenObscured(boolean)} or set the 676 * android:filterTouchesWhenObscured layout attribute to true. When enabled, the framework 677 * will discard touches that are received whenever the view's window is obscured by 678 * another visible window. As a result, the view will not receive touches whenever a 679 * toast, dialog or other window appears above the view's window. 680 * </p><p> 681 * For more fine-grained control over security, consider overriding the 682 * {@link #onFilterTouchEventForSecurity(MotionEvent)} method to implement your own 683 * security policy. See also {@link MotionEvent#FLAG_WINDOW_IS_OBSCURED}. 684 * </p> 685 * 686 * @attr ref android.R.styleable#View_alpha 687 * @attr ref android.R.styleable#View_background 688 * @attr ref android.R.styleable#View_clickable 689 * @attr ref android.R.styleable#View_contentDescription 690 * @attr ref android.R.styleable#View_drawingCacheQuality 691 * @attr ref android.R.styleable#View_duplicateParentState 692 * @attr ref android.R.styleable#View_id 693 * @attr ref android.R.styleable#View_requiresFadingEdge 694 * @attr ref android.R.styleable#View_fadeScrollbars 695 * @attr ref android.R.styleable#View_fadingEdgeLength 696 * @attr ref android.R.styleable#View_filterTouchesWhenObscured 697 * @attr ref android.R.styleable#View_fitsSystemWindows 698 * @attr ref android.R.styleable#View_isScrollContainer 699 * @attr ref android.R.styleable#View_focusable 700 * @attr ref android.R.styleable#View_focusableInTouchMode 701 * @attr ref android.R.styleable#View_hapticFeedbackEnabled 702 * @attr ref android.R.styleable#View_keepScreenOn 703 * @attr ref android.R.styleable#View_layerType 704 * @attr ref android.R.styleable#View_layoutDirection 705 * @attr ref android.R.styleable#View_longClickable 706 * @attr ref android.R.styleable#View_minHeight 707 * @attr ref android.R.styleable#View_minWidth 708 * @attr ref android.R.styleable#View_nextFocusDown 709 * @attr ref android.R.styleable#View_nextFocusLeft 710 * @attr ref android.R.styleable#View_nextFocusRight 711 * @attr ref android.R.styleable#View_nextFocusUp 712 * @attr ref android.R.styleable#View_onClick 713 * @attr ref android.R.styleable#View_padding 714 * @attr ref android.R.styleable#View_paddingBottom 715 * @attr ref android.R.styleable#View_paddingLeft 716 * @attr ref android.R.styleable#View_paddingRight 717 * @attr ref android.R.styleable#View_paddingTop 718 * @attr ref android.R.styleable#View_paddingStart 719 * @attr ref android.R.styleable#View_paddingEnd 720 * @attr ref android.R.styleable#View_saveEnabled 721 * @attr ref android.R.styleable#View_rotation 722 * @attr ref android.R.styleable#View_rotationX 723 * @attr ref android.R.styleable#View_rotationY 724 * @attr ref android.R.styleable#View_scaleX 725 * @attr ref android.R.styleable#View_scaleY 726 * @attr ref android.R.styleable#View_scrollX 727 * @attr ref android.R.styleable#View_scrollY 728 * @attr ref android.R.styleable#View_scrollbarSize 729 * @attr ref android.R.styleable#View_scrollbarStyle 730 * @attr ref android.R.styleable#View_scrollbars 731 * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade 732 * @attr ref android.R.styleable#View_scrollbarFadeDuration 733 * @attr ref android.R.styleable#View_scrollbarTrackHorizontal 734 * @attr ref android.R.styleable#View_scrollbarThumbHorizontal 735 * @attr ref android.R.styleable#View_scrollbarThumbVertical 736 * @attr ref android.R.styleable#View_scrollbarTrackVertical 737 * @attr ref android.R.styleable#View_scrollbarAlwaysDrawHorizontalTrack 738 * @attr ref android.R.styleable#View_scrollbarAlwaysDrawVerticalTrack 739 * @attr ref android.R.styleable#View_stateListAnimator 740 * @attr ref android.R.styleable#View_transitionName 741 * @attr ref android.R.styleable#View_soundEffectsEnabled 742 * @attr ref android.R.styleable#View_tag 743 * @attr ref android.R.styleable#View_textAlignment 744 * @attr ref android.R.styleable#View_textDirection 745 * @attr ref android.R.styleable#View_transformPivotX 746 * @attr ref android.R.styleable#View_transformPivotY 747 * @attr ref android.R.styleable#View_translationX 748 * @attr ref android.R.styleable#View_translationY 749 * @attr ref android.R.styleable#View_translationZ 750 * @attr ref android.R.styleable#View_visibility 751 * @attr ref android.R.styleable#View_theme 752 * 753 * @see android.view.ViewGroup 754 */ 755 @UiThread 756 public class View implements Drawable.Callback, KeyEvent.Callback, 757 AccessibilityEventSource { 758 private static final boolean DBG = false; 759 760 /** 761 * The logging tag used by this class with android.util.Log. 762 */ 763 protected static final String VIEW_LOG_TAG = "View"; 764 765 /** 766 * When set to true, apps will draw debugging information about their layouts. 767 * 768 * @hide 769 */ 770 public static final String DEBUG_LAYOUT_PROPERTY = "debug.layout"; 771 772 /** 773 * When set to true, this view will save its attribute data. 774 * 775 * @hide 776 */ 777 public static boolean mDebugViewAttributes = false; 778 779 /** 780 * Used to mark a View that has no ID. 781 */ 782 public static final int NO_ID = -1; 783 784 /** 785 * Signals that compatibility booleans have been initialized according to 786 * target SDK versions. 787 */ 788 private static boolean sCompatibilityDone = false; 789 790 /** 791 * Use the old (broken) way of building MeasureSpecs. 792 */ 793 private static boolean sUseBrokenMakeMeasureSpec = false; 794 795 /** 796 * Always return a size of 0 for MeasureSpec values with a mode of UNSPECIFIED 797 */ 798 static boolean sUseZeroUnspecifiedMeasureSpec = false; 799 800 /** 801 * Ignore any optimizations using the measure cache. 802 */ 803 private static boolean sIgnoreMeasureCache = false; 804 805 /** 806 * Ignore an optimization that skips unnecessary EXACTLY layout passes. 807 */ 808 private static boolean sAlwaysRemeasureExactly = false; 809 810 /** 811 * Relax constraints around whether setLayoutParams() must be called after 812 * modifying the layout params. 813 */ 814 private static boolean sLayoutParamsAlwaysChanged = false; 815 816 /** 817 * Allow setForeground/setBackground to be called (and ignored) on a textureview, 818 * without throwing 819 */ 820 static boolean sTextureViewIgnoresDrawableSetters = false; 821 822 /** 823 * Prior to N, some ViewGroups would not convert LayoutParams properly even though both extend 824 * MarginLayoutParams. For instance, converting LinearLayout.LayoutParams to 825 * RelativeLayout.LayoutParams would lose margin information. This is fixed on N but target API 826 * check is implemented for backwards compatibility. 827 * 828 * {@hide} 829 */ 830 protected static boolean sPreserveMarginParamsInLayoutParamConversion; 831 832 /** 833 * Prior to N, when drag enters into child of a view that has already received an 834 * ACTION_DRAG_ENTERED event, the parent doesn't get a ACTION_DRAG_EXITED event. 835 * ACTION_DRAG_LOCATION and ACTION_DROP were delivered to the parent of a view that returned 836 * false from its event handler for these events. 837 * Starting from N, the parent will get ACTION_DRAG_EXITED event before the child gets its 838 * ACTION_DRAG_ENTERED. ACTION_DRAG_LOCATION and ACTION_DROP are never propagated to the parent. 839 * sCascadedDragDrop is true for pre-N apps for backwards compatibility implementation. 840 */ 841 static boolean sCascadedDragDrop; 842 843 /** 844 * This view does not want keystrokes. Use with TAKES_FOCUS_MASK when 845 * calling setFlags. 846 */ 847 private static final int NOT_FOCUSABLE = 0x00000000; 848 849 /** 850 * This view wants keystrokes. Use with TAKES_FOCUS_MASK when calling 851 * setFlags. 852 */ 853 private static final int FOCUSABLE = 0x00000001; 854 855 /** 856 * Mask for use with setFlags indicating bits used for focus. 857 */ 858 private static final int FOCUSABLE_MASK = 0x00000001; 859 860 /** 861 * This view will adjust its padding to fit sytem windows (e.g. status bar) 862 */ 863 private static final int FITS_SYSTEM_WINDOWS = 0x00000002; 864 865 /** @hide */ 866 @IntDef({VISIBLE, INVISIBLE, GONE}) 867 @Retention(RetentionPolicy.SOURCE) 868 public @interface Visibility {} 869 870 /** 871 * This view is visible. 872 * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 873 * android:visibility}. 874 */ 875 public static final int VISIBLE = 0x00000000; 876 877 /** 878 * This view is invisible, but it still takes up space for layout purposes. 879 * Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 880 * android:visibility}. 881 */ 882 public static final int INVISIBLE = 0x00000004; 883 884 /** 885 * This view is invisible, and it doesn't take any space for layout 886 * purposes. Use with {@link #setVisibility} and <a href="#attr_android:visibility">{@code 887 * android:visibility}. 888 */ 889 public static final int GONE = 0x00000008; 890 891 /** 892 * Mask for use with setFlags indicating bits used for visibility. 893 * {@hide} 894 */ 895 static final int VISIBILITY_MASK = 0x0000000C; 896 897 private static final int[] VISIBILITY_FLAGS = {VISIBLE, INVISIBLE, GONE}; 898 899 /** 900 * This view is enabled. Interpretation varies by subclass. 901 * Use with ENABLED_MASK when calling setFlags. 902 * {@hide} 903 */ 904 static final int ENABLED = 0x00000000; 905 906 /** 907 * This view is disabled. Interpretation varies by subclass. 908 * Use with ENABLED_MASK when calling setFlags. 909 * {@hide} 910 */ 911 static final int DISABLED = 0x00000020; 912 913 /** 914 * Mask for use with setFlags indicating bits used for indicating whether 915 * this view is enabled 916 * {@hide} 917 */ 918 static final int ENABLED_MASK = 0x00000020; 919 920 /** 921 * This view won't draw. {@link #onDraw(android.graphics.Canvas)} won't be 922 * called and further optimizations will be performed. It is okay to have 923 * this flag set and a background. Use with DRAW_MASK when calling setFlags. 924 * {@hide} 925 */ 926 static final int WILL_NOT_DRAW = 0x00000080; 927 928 /** 929 * Mask for use with setFlags indicating bits used for indicating whether 930 * this view is will draw 931 * {@hide} 932 */ 933 static final int DRAW_MASK = 0x00000080; 934 935 /** 936 * <p>This view doesn't show scrollbars.</p> 937 * {@hide} 938 */ 939 static final int SCROLLBARS_NONE = 0x00000000; 940 941 /** 942 * <p>This view shows horizontal scrollbars.</p> 943 * {@hide} 944 */ 945 static final int SCROLLBARS_HORIZONTAL = 0x00000100; 946 947 /** 948 * <p>This view shows vertical scrollbars.</p> 949 * {@hide} 950 */ 951 static final int SCROLLBARS_VERTICAL = 0x00000200; 952 953 /** 954 * <p>Mask for use with setFlags indicating bits used for indicating which 955 * scrollbars are enabled.</p> 956 * {@hide} 957 */ 958 static final int SCROLLBARS_MASK = 0x00000300; 959 960 /** 961 * Indicates that the view should filter touches when its window is obscured. 962 * Refer to the class comments for more information about this security feature. 963 * {@hide} 964 */ 965 static final int FILTER_TOUCHES_WHEN_OBSCURED = 0x00000400; 966 967 /** 968 * Set for framework elements that use FITS_SYSTEM_WINDOWS, to indicate 969 * that they are optional and should be skipped if the window has 970 * requested system UI flags that ignore those insets for layout. 971 */ 972 static final int OPTIONAL_FITS_SYSTEM_WINDOWS = 0x00000800; 973 974 /** 975 * <p>This view doesn't show fading edges.</p> 976 * {@hide} 977 */ 978 static final int FADING_EDGE_NONE = 0x00000000; 979 980 /** 981 * <p>This view shows horizontal fading edges.</p> 982 * {@hide} 983 */ 984 static final int FADING_EDGE_HORIZONTAL = 0x00001000; 985 986 /** 987 * <p>This view shows vertical fading edges.</p> 988 * {@hide} 989 */ 990 static final int FADING_EDGE_VERTICAL = 0x00002000; 991 992 /** 993 * <p>Mask for use with setFlags indicating bits used for indicating which 994 * fading edges are enabled.</p> 995 * {@hide} 996 */ 997 static final int FADING_EDGE_MASK = 0x00003000; 998 999 /** 1000 * <p>Indicates this view can be clicked. When clickable, a View reacts 1001 * to clicks by notifying the OnClickListener.<p> 1002 * {@hide} 1003 */ 1004 static final int CLICKABLE = 0x00004000; 1005 1006 /** 1007 * <p>Indicates this view is caching its drawing into a bitmap.</p> 1008 * {@hide} 1009 */ 1010 static final int DRAWING_CACHE_ENABLED = 0x00008000; 1011 1012 /** 1013 * <p>Indicates that no icicle should be saved for this view.<p> 1014 * {@hide} 1015 */ 1016 static final int SAVE_DISABLED = 0x000010000; 1017 1018 /** 1019 * <p>Mask for use with setFlags indicating bits used for the saveEnabled 1020 * property.</p> 1021 * {@hide} 1022 */ 1023 static final int SAVE_DISABLED_MASK = 0x000010000; 1024 1025 /** 1026 * <p>Indicates that no drawing cache should ever be created for this view.<p> 1027 * {@hide} 1028 */ 1029 static final int WILL_NOT_CACHE_DRAWING = 0x000020000; 1030 1031 /** 1032 * <p>Indicates this view can take / keep focus when int touch mode.</p> 1033 * {@hide} 1034 */ 1035 static final int FOCUSABLE_IN_TOUCH_MODE = 0x00040000; 1036 1037 /** @hide */ 1038 @Retention(RetentionPolicy.SOURCE) 1039 @IntDef({DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH, DRAWING_CACHE_QUALITY_AUTO}) 1040 public @interface DrawingCacheQuality {} 1041 1042 /** 1043 * <p>Enables low quality mode for the drawing cache.</p> 1044 */ 1045 public static final int DRAWING_CACHE_QUALITY_LOW = 0x00080000; 1046 1047 /** 1048 * <p>Enables high quality mode for the drawing cache.</p> 1049 */ 1050 public static final int DRAWING_CACHE_QUALITY_HIGH = 0x00100000; 1051 1052 /** 1053 * <p>Enables automatic quality mode for the drawing cache.</p> 1054 */ 1055 public static final int DRAWING_CACHE_QUALITY_AUTO = 0x00000000; 1056 1057 private static final int[] DRAWING_CACHE_QUALITY_FLAGS = { 1058 DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH 1059 }; 1060 1061 /** 1062 * <p>Mask for use with setFlags indicating bits used for the cache 1063 * quality property.</p> 1064 * {@hide} 1065 */ 1066 static final int DRAWING_CACHE_QUALITY_MASK = 0x00180000; 1067 1068 /** 1069 * <p> 1070 * Indicates this view can be long clicked. When long clickable, a View 1071 * reacts to long clicks by notifying the OnLongClickListener or showing a 1072 * context menu. 1073 * </p> 1074 * {@hide} 1075 */ 1076 static final int LONG_CLICKABLE = 0x00200000; 1077 1078 /** 1079 * <p>Indicates that this view gets its drawable states from its direct parent 1080 * and ignores its original internal states.</p> 1081 * 1082 * @hide 1083 */ 1084 static final int DUPLICATE_PARENT_STATE = 0x00400000; 1085 1086 /** 1087 * <p> 1088 * Indicates this view can be context clicked. When context clickable, a View reacts to a 1089 * context click (e.g. a primary stylus button press or right mouse click) by notifying the 1090 * OnContextClickListener. 1091 * </p> 1092 * {@hide} 1093 */ 1094 static final int CONTEXT_CLICKABLE = 0x00800000; 1095 1096 1097 /** @hide */ 1098 @IntDef({ 1099 SCROLLBARS_INSIDE_OVERLAY, 1100 SCROLLBARS_INSIDE_INSET, 1101 SCROLLBARS_OUTSIDE_OVERLAY, 1102 SCROLLBARS_OUTSIDE_INSET 1103 }) 1104 @Retention(RetentionPolicy.SOURCE) 1105 public @interface ScrollBarStyle {} 1106 1107 /** 1108 * The scrollbar style to display the scrollbars inside the content area, 1109 * without increasing the padding. The scrollbars will be overlaid with 1110 * translucency on the view's content. 1111 */ 1112 public static final int SCROLLBARS_INSIDE_OVERLAY = 0; 1113 1114 /** 1115 * The scrollbar style to display the scrollbars inside the padded area, 1116 * increasing the padding of the view. The scrollbars will not overlap the 1117 * content area of the view. 1118 */ 1119 public static final int SCROLLBARS_INSIDE_INSET = 0x01000000; 1120 1121 /** 1122 * The scrollbar style to display the scrollbars at the edge of the view, 1123 * without increasing the padding. The scrollbars will be overlaid with 1124 * translucency. 1125 */ 1126 public static final int SCROLLBARS_OUTSIDE_OVERLAY = 0x02000000; 1127 1128 /** 1129 * The scrollbar style to display the scrollbars at the edge of the view, 1130 * increasing the padding of the view. The scrollbars will only overlap the 1131 * background, if any. 1132 */ 1133 public static final int SCROLLBARS_OUTSIDE_INSET = 0x03000000; 1134 1135 /** 1136 * Mask to check if the scrollbar style is overlay or inset. 1137 * {@hide} 1138 */ 1139 static final int SCROLLBARS_INSET_MASK = 0x01000000; 1140 1141 /** 1142 * Mask to check if the scrollbar style is inside or outside. 1143 * {@hide} 1144 */ 1145 static final int SCROLLBARS_OUTSIDE_MASK = 0x02000000; 1146 1147 /** 1148 * Mask for scrollbar style. 1149 * {@hide} 1150 */ 1151 static final int SCROLLBARS_STYLE_MASK = 0x03000000; 1152 1153 /** 1154 * View flag indicating that the screen should remain on while the 1155 * window containing this view is visible to the user. This effectively 1156 * takes care of automatically setting the WindowManager's 1157 * {@link WindowManager.LayoutParams#FLAG_KEEP_SCREEN_ON}. 1158 */ 1159 public static final int KEEP_SCREEN_ON = 0x04000000; 1160 1161 /** 1162 * View flag indicating whether this view should have sound effects enabled 1163 * for events such as clicking and touching. 1164 */ 1165 public static final int SOUND_EFFECTS_ENABLED = 0x08000000; 1166 1167 /** 1168 * View flag indicating whether this view should have haptic feedback 1169 * enabled for events such as long presses. 1170 */ 1171 public static final int HAPTIC_FEEDBACK_ENABLED = 0x10000000; 1172 1173 /** 1174 * <p>Indicates that the view hierarchy should stop saving state when 1175 * it reaches this view. If state saving is initiated immediately at 1176 * the view, it will be allowed. 1177 * {@hide} 1178 */ 1179 static final int PARENT_SAVE_DISABLED = 0x20000000; 1180 1181 /** 1182 * <p>Mask for use with setFlags indicating bits used for PARENT_SAVE_DISABLED.</p> 1183 * {@hide} 1184 */ 1185 static final int PARENT_SAVE_DISABLED_MASK = 0x20000000; 1186 1187 /** @hide */ 1188 @IntDef(flag = true, 1189 value = { 1190 FOCUSABLES_ALL, 1191 FOCUSABLES_TOUCH_MODE 1192 }) 1193 @Retention(RetentionPolicy.SOURCE) 1194 public @interface FocusableMode {} 1195 1196 /** 1197 * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} 1198 * should add all focusable Views regardless if they are focusable in touch mode. 1199 */ 1200 public static final int FOCUSABLES_ALL = 0x00000000; 1201 1202 /** 1203 * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} 1204 * should add only Views focusable in touch mode. 1205 */ 1206 public static final int FOCUSABLES_TOUCH_MODE = 0x00000001; 1207 1208 /** @hide */ 1209 @IntDef({ 1210 FOCUS_BACKWARD, 1211 FOCUS_FORWARD, 1212 FOCUS_LEFT, 1213 FOCUS_UP, 1214 FOCUS_RIGHT, 1215 FOCUS_DOWN 1216 }) 1217 @Retention(RetentionPolicy.SOURCE) 1218 public @interface FocusDirection {} 1219 1220 /** @hide */ 1221 @IntDef({ 1222 FOCUS_LEFT, 1223 FOCUS_UP, 1224 FOCUS_RIGHT, 1225 FOCUS_DOWN 1226 }) 1227 @Retention(RetentionPolicy.SOURCE) 1228 public @interface FocusRealDirection {} // Like @FocusDirection, but without forward/backward 1229 1230 /** 1231 * Use with {@link #focusSearch(int)}. Move focus to the previous selectable 1232 * item. 1233 */ 1234 public static final int FOCUS_BACKWARD = 0x00000001; 1235 1236 /** 1237 * Use with {@link #focusSearch(int)}. Move focus to the next selectable 1238 * item. 1239 */ 1240 public static final int FOCUS_FORWARD = 0x00000002; 1241 1242 /** 1243 * Use with {@link #focusSearch(int)}. Move focus to the left. 1244 */ 1245 public static final int FOCUS_LEFT = 0x00000011; 1246 1247 /** 1248 * Use with {@link #focusSearch(int)}. Move focus up. 1249 */ 1250 public static final int FOCUS_UP = 0x00000021; 1251 1252 /** 1253 * Use with {@link #focusSearch(int)}. Move focus to the right. 1254 */ 1255 public static final int FOCUS_RIGHT = 0x00000042; 1256 1257 /** 1258 * Use with {@link #focusSearch(int)}. Move focus down. 1259 */ 1260 public static final int FOCUS_DOWN = 0x00000082; 1261 1262 /** 1263 * Bits of {@link #getMeasuredWidthAndState()} and 1264 * {@link #getMeasuredWidthAndState()} that provide the actual measured size. 1265 */ 1266 public static final int MEASURED_SIZE_MASK = 0x00ffffff; 1267 1268 /** 1269 * Bits of {@link #getMeasuredWidthAndState()} and 1270 * {@link #getMeasuredWidthAndState()} that provide the additional state bits. 1271 */ 1272 public static final int MEASURED_STATE_MASK = 0xff000000; 1273 1274 /** 1275 * Bit shift of {@link #MEASURED_STATE_MASK} to get to the height bits 1276 * for functions that combine both width and height into a single int, 1277 * such as {@link #getMeasuredState()} and the childState argument of 1278 * {@link #resolveSizeAndState(int, int, int)}. 1279 */ 1280 public static final int MEASURED_HEIGHT_STATE_SHIFT = 16; 1281 1282 /** 1283 * Bit of {@link #getMeasuredWidthAndState()} and 1284 * {@link #getMeasuredWidthAndState()} that indicates the measured size 1285 * is smaller that the space the view would like to have. 1286 */ 1287 public static final int MEASURED_STATE_TOO_SMALL = 0x01000000; 1288 1289 /** 1290 * Base View state sets 1291 */ 1292 // Singles 1293 /** 1294 * Indicates the view has no states set. States are used with 1295 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1296 * view depending on its state. 1297 * 1298 * @see android.graphics.drawable.Drawable 1299 * @see #getDrawableState() 1300 */ 1301 protected static final int[] EMPTY_STATE_SET; 1302 /** 1303 * Indicates the view is enabled. States are used with 1304 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1305 * view depending on its state. 1306 * 1307 * @see android.graphics.drawable.Drawable 1308 * @see #getDrawableState() 1309 */ 1310 protected static final int[] ENABLED_STATE_SET; 1311 /** 1312 * Indicates the view is focused. States are used with 1313 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1314 * view depending on its state. 1315 * 1316 * @see android.graphics.drawable.Drawable 1317 * @see #getDrawableState() 1318 */ 1319 protected static final int[] FOCUSED_STATE_SET; 1320 /** 1321 * Indicates the view is selected. States are used with 1322 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1323 * view depending on its state. 1324 * 1325 * @see android.graphics.drawable.Drawable 1326 * @see #getDrawableState() 1327 */ 1328 protected static final int[] SELECTED_STATE_SET; 1329 /** 1330 * Indicates the view is pressed. States are used with 1331 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1332 * view depending on its state. 1333 * 1334 * @see android.graphics.drawable.Drawable 1335 * @see #getDrawableState() 1336 */ 1337 protected static final int[] PRESSED_STATE_SET; 1338 /** 1339 * Indicates the view's window has focus. States are used with 1340 * {@link android.graphics.drawable.Drawable} to change the drawing of the 1341 * view depending on its state. 1342 * 1343 * @see android.graphics.drawable.Drawable 1344 * @see #getDrawableState() 1345 */ 1346 protected static final int[] WINDOW_FOCUSED_STATE_SET; 1347 // Doubles 1348 /** 1349 * Indicates the view is enabled and has the focus. 1350 * 1351 * @see #ENABLED_STATE_SET 1352 * @see #FOCUSED_STATE_SET 1353 */ 1354 protected static final int[] ENABLED_FOCUSED_STATE_SET; 1355 /** 1356 * Indicates the view is enabled and selected. 1357 * 1358 * @see #ENABLED_STATE_SET 1359 * @see #SELECTED_STATE_SET 1360 */ 1361 protected static final int[] ENABLED_SELECTED_STATE_SET; 1362 /** 1363 * Indicates the view is enabled and that its window has focus. 1364 * 1365 * @see #ENABLED_STATE_SET 1366 * @see #WINDOW_FOCUSED_STATE_SET 1367 */ 1368 protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET; 1369 /** 1370 * Indicates the view is focused and selected. 1371 * 1372 * @see #FOCUSED_STATE_SET 1373 * @see #SELECTED_STATE_SET 1374 */ 1375 protected static final int[] FOCUSED_SELECTED_STATE_SET; 1376 /** 1377 * Indicates the view has the focus and that its window has the focus. 1378 * 1379 * @see #FOCUSED_STATE_SET 1380 * @see #WINDOW_FOCUSED_STATE_SET 1381 */ 1382 protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET; 1383 /** 1384 * Indicates the view is selected and that its window has the focus. 1385 * 1386 * @see #SELECTED_STATE_SET 1387 * @see #WINDOW_FOCUSED_STATE_SET 1388 */ 1389 protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET; 1390 // Triples 1391 /** 1392 * Indicates the view is enabled, focused and selected. 1393 * 1394 * @see #ENABLED_STATE_SET 1395 * @see #FOCUSED_STATE_SET 1396 * @see #SELECTED_STATE_SET 1397 */ 1398 protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET; 1399 /** 1400 * Indicates the view is enabled, focused and its window has the focus. 1401 * 1402 * @see #ENABLED_STATE_SET 1403 * @see #FOCUSED_STATE_SET 1404 * @see #WINDOW_FOCUSED_STATE_SET 1405 */ 1406 protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1407 /** 1408 * Indicates the view is enabled, selected and its window has the focus. 1409 * 1410 * @see #ENABLED_STATE_SET 1411 * @see #SELECTED_STATE_SET 1412 * @see #WINDOW_FOCUSED_STATE_SET 1413 */ 1414 protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1415 /** 1416 * Indicates the view is focused, selected and its window has the focus. 1417 * 1418 * @see #FOCUSED_STATE_SET 1419 * @see #SELECTED_STATE_SET 1420 * @see #WINDOW_FOCUSED_STATE_SET 1421 */ 1422 protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1423 /** 1424 * Indicates the view is enabled, focused, selected and its window 1425 * has the focus. 1426 * 1427 * @see #ENABLED_STATE_SET 1428 * @see #FOCUSED_STATE_SET 1429 * @see #SELECTED_STATE_SET 1430 * @see #WINDOW_FOCUSED_STATE_SET 1431 */ 1432 protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1433 /** 1434 * Indicates the view is pressed and its window has the focus. 1435 * 1436 * @see #PRESSED_STATE_SET 1437 * @see #WINDOW_FOCUSED_STATE_SET 1438 */ 1439 protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET; 1440 /** 1441 * Indicates the view is pressed and selected. 1442 * 1443 * @see #PRESSED_STATE_SET 1444 * @see #SELECTED_STATE_SET 1445 */ 1446 protected static final int[] PRESSED_SELECTED_STATE_SET; 1447 /** 1448 * Indicates the view is pressed, selected and its window has the focus. 1449 * 1450 * @see #PRESSED_STATE_SET 1451 * @see #SELECTED_STATE_SET 1452 * @see #WINDOW_FOCUSED_STATE_SET 1453 */ 1454 protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1455 /** 1456 * Indicates the view is pressed and focused. 1457 * 1458 * @see #PRESSED_STATE_SET 1459 * @see #FOCUSED_STATE_SET 1460 */ 1461 protected static final int[] PRESSED_FOCUSED_STATE_SET; 1462 /** 1463 * Indicates the view is pressed, focused and its window has the focus. 1464 * 1465 * @see #PRESSED_STATE_SET 1466 * @see #FOCUSED_STATE_SET 1467 * @see #WINDOW_FOCUSED_STATE_SET 1468 */ 1469 protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1470 /** 1471 * Indicates the view is pressed, focused and selected. 1472 * 1473 * @see #PRESSED_STATE_SET 1474 * @see #SELECTED_STATE_SET 1475 * @see #FOCUSED_STATE_SET 1476 */ 1477 protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET; 1478 /** 1479 * Indicates the view is pressed, focused, selected and its window has the focus. 1480 * 1481 * @see #PRESSED_STATE_SET 1482 * @see #FOCUSED_STATE_SET 1483 * @see #SELECTED_STATE_SET 1484 * @see #WINDOW_FOCUSED_STATE_SET 1485 */ 1486 protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1487 /** 1488 * Indicates the view is pressed and enabled. 1489 * 1490 * @see #PRESSED_STATE_SET 1491 * @see #ENABLED_STATE_SET 1492 */ 1493 protected static final int[] PRESSED_ENABLED_STATE_SET; 1494 /** 1495 * Indicates the view is pressed, enabled and its window has the focus. 1496 * 1497 * @see #PRESSED_STATE_SET 1498 * @see #ENABLED_STATE_SET 1499 * @see #WINDOW_FOCUSED_STATE_SET 1500 */ 1501 protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET; 1502 /** 1503 * Indicates the view is pressed, enabled and selected. 1504 * 1505 * @see #PRESSED_STATE_SET 1506 * @see #ENABLED_STATE_SET 1507 * @see #SELECTED_STATE_SET 1508 */ 1509 protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET; 1510 /** 1511 * Indicates the view is pressed, enabled, selected and its window has the 1512 * focus. 1513 * 1514 * @see #PRESSED_STATE_SET 1515 * @see #ENABLED_STATE_SET 1516 * @see #SELECTED_STATE_SET 1517 * @see #WINDOW_FOCUSED_STATE_SET 1518 */ 1519 protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1520 /** 1521 * Indicates the view is pressed, enabled and focused. 1522 * 1523 * @see #PRESSED_STATE_SET 1524 * @see #ENABLED_STATE_SET 1525 * @see #FOCUSED_STATE_SET 1526 */ 1527 protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET; 1528 /** 1529 * Indicates the view is pressed, enabled, focused and its window has the 1530 * focus. 1531 * 1532 * @see #PRESSED_STATE_SET 1533 * @see #ENABLED_STATE_SET 1534 * @see #FOCUSED_STATE_SET 1535 * @see #WINDOW_FOCUSED_STATE_SET 1536 */ 1537 protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; 1538 /** 1539 * Indicates the view is pressed, enabled, focused and selected. 1540 * 1541 * @see #PRESSED_STATE_SET 1542 * @see #ENABLED_STATE_SET 1543 * @see #SELECTED_STATE_SET 1544 * @see #FOCUSED_STATE_SET 1545 */ 1546 protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET; 1547 /** 1548 * Indicates the view is pressed, enabled, focused, selected and its window 1549 * has the focus. 1550 * 1551 * @see #PRESSED_STATE_SET 1552 * @see #ENABLED_STATE_SET 1553 * @see #SELECTED_STATE_SET 1554 * @see #FOCUSED_STATE_SET 1555 * @see #WINDOW_FOCUSED_STATE_SET 1556 */ 1557 protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; 1558 1559 static { 1560 EMPTY_STATE_SET = StateSet.get(0); 1561 1562 WINDOW_FOCUSED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_WINDOW_FOCUSED); 1563 1564 SELECTED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_SELECTED); 1565 SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1566 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED); 1567 1568 FOCUSED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_FOCUSED); 1569 FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1570 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED); 1571 FOCUSED_SELECTED_STATE_SET = StateSet.get( 1572 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED); 1573 FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1574 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1575 | StateSet.VIEW_STATE_FOCUSED); 1576 1577 ENABLED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_ENABLED); 1578 ENABLED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1579 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_ENABLED); 1580 ENABLED_SELECTED_STATE_SET = StateSet.get( 1581 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_ENABLED); 1582 ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1583 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1584 | StateSet.VIEW_STATE_ENABLED); 1585 ENABLED_FOCUSED_STATE_SET = StateSet.get( 1586 StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_ENABLED); 1587 ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1588 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED 1589 | StateSet.VIEW_STATE_ENABLED); 1590 ENABLED_FOCUSED_SELECTED_STATE_SET = StateSet.get( 1591 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED 1592 | StateSet.VIEW_STATE_ENABLED); 1593 ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1594 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1595 | StateSet.VIEW_STATE_FOCUSED| StateSet.VIEW_STATE_ENABLED); 1596 1597 PRESSED_STATE_SET = StateSet.get(StateSet.VIEW_STATE_PRESSED); 1598 PRESSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1599 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_PRESSED); 1600 PRESSED_SELECTED_STATE_SET = StateSet.get( 1601 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_PRESSED); 1602 PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1603 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1604 | StateSet.VIEW_STATE_PRESSED); 1605 PRESSED_FOCUSED_STATE_SET = StateSet.get( 1606 StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_PRESSED); 1607 PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1608 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED 1609 | StateSet.VIEW_STATE_PRESSED); 1610 PRESSED_FOCUSED_SELECTED_STATE_SET = StateSet.get( 1611 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED 1612 | StateSet.VIEW_STATE_PRESSED); 1613 PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1614 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1615 | StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_PRESSED); 1616 PRESSED_ENABLED_STATE_SET = StateSet.get( 1617 StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); 1618 PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1619 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_ENABLED 1620 | StateSet.VIEW_STATE_PRESSED); 1621 PRESSED_ENABLED_SELECTED_STATE_SET = StateSet.get( 1622 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_ENABLED 1623 | StateSet.VIEW_STATE_PRESSED); 1624 PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1625 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1626 | StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); 1627 PRESSED_ENABLED_FOCUSED_STATE_SET = StateSet.get( 1628 StateSet.VIEW_STATE_FOCUSED | StateSet.VIEW_STATE_ENABLED 1629 | StateSet.VIEW_STATE_PRESSED); 1630 PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1631 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_FOCUSED 1632 | StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); 1633 PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET = StateSet.get( 1634 StateSet.VIEW_STATE_SELECTED | StateSet.VIEW_STATE_FOCUSED 1635 | StateSet.VIEW_STATE_ENABLED | StateSet.VIEW_STATE_PRESSED); 1636 PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = StateSet.get( 1637 StateSet.VIEW_STATE_WINDOW_FOCUSED | StateSet.VIEW_STATE_SELECTED 1638 | StateSet.VIEW_STATE_FOCUSED| StateSet.VIEW_STATE_ENABLED 1639 | StateSet.VIEW_STATE_PRESSED); 1640 } 1641 1642 /** 1643 * Accessibility event types that are dispatched for text population. 1644 */ 1645 private static final int POPULATING_ACCESSIBILITY_EVENT_TYPES = 1646 AccessibilityEvent.TYPE_VIEW_CLICKED 1647 | AccessibilityEvent.TYPE_VIEW_LONG_CLICKED 1648 | AccessibilityEvent.TYPE_VIEW_SELECTED 1649 | AccessibilityEvent.TYPE_VIEW_FOCUSED 1650 | AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED 1651 | AccessibilityEvent.TYPE_VIEW_HOVER_ENTER 1652 | AccessibilityEvent.TYPE_VIEW_HOVER_EXIT 1653 | AccessibilityEvent.TYPE_VIEW_TEXT_CHANGED 1654 | AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED 1655 | AccessibilityEvent.TYPE_VIEW_ACCESSIBILITY_FOCUSED 1656 | AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY; 1657 1658 /** 1659 * Temporary Rect currently for use in setBackground(). This will probably 1660 * be extended in the future to hold our own class with more than just 1661 * a Rect. :) 1662 */ 1663 static final ThreadLocal<Rect> sThreadLocal = new ThreadLocal<Rect>(); 1664 1665 /** 1666 * Map used to store views' tags. 1667 */ 1668 private SparseArray<Object> mKeyedTags; 1669 1670 /** 1671 * The next available accessibility id. 1672 */ 1673 private static int sNextAccessibilityViewId; 1674 1675 /** 1676 * The animation currently associated with this view. 1677 * @hide 1678 */ 1679 protected Animation mCurrentAnimation = null; 1680 1681 /** 1682 * Width as measured during measure pass. 1683 * {@hide} 1684 */ 1685 @ViewDebug.ExportedProperty(category = "measurement") 1686 int mMeasuredWidth; 1687 1688 /** 1689 * Height as measured during measure pass. 1690 * {@hide} 1691 */ 1692 @ViewDebug.ExportedProperty(category = "measurement") 1693 int mMeasuredHeight; 1694 1695 /** 1696 * Flag to indicate that this view was marked INVALIDATED, or had its display list 1697 * invalidated, prior to the current drawing iteration. If true, the view must re-draw 1698 * its display list. This flag, used only when hw accelerated, allows us to clear the 1699 * flag while retaining this information until it's needed (at getDisplayList() time and 1700 * in drawChild(), when we decide to draw a view's children's display lists into our own). 1701 * 1702 * {@hide} 1703 */ 1704 boolean mRecreateDisplayList = false; 1705 1706 /** 1707 * The view's identifier. 1708 * {@hide} 1709 * 1710 * @see #setId(int) 1711 * @see #getId() 1712 */ 1713 @IdRes 1714 @ViewDebug.ExportedProperty(resolveId = true) 1715 int mID = NO_ID; 1716 1717 /** 1718 * The stable ID of this view for accessibility purposes. 1719 */ 1720 int mAccessibilityViewId = NO_ID; 1721 1722 private int mAccessibilityCursorPosition = ACCESSIBILITY_CURSOR_POSITION_UNDEFINED; 1723 1724 SendViewStateChangedAccessibilityEvent mSendViewStateChangedAccessibilityEvent; 1725 1726 /** 1727 * The view's tag. 1728 * {@hide} 1729 * 1730 * @see #setTag(Object) 1731 * @see #getTag() 1732 */ 1733 protected Object mTag = null; 1734 1735 // for mPrivateFlags: 1736 /** {@hide} */ 1737 static final int PFLAG_WANTS_FOCUS = 0x00000001; 1738 /** {@hide} */ 1739 static final int PFLAG_FOCUSED = 0x00000002; 1740 /** {@hide} */ 1741 static final int PFLAG_SELECTED = 0x00000004; 1742 /** {@hide} */ 1743 static final int PFLAG_IS_ROOT_NAMESPACE = 0x00000008; 1744 /** {@hide} */ 1745 static final int PFLAG_HAS_BOUNDS = 0x00000010; 1746 /** {@hide} */ 1747 static final int PFLAG_DRAWN = 0x00000020; 1748 /** 1749 * When this flag is set, this view is running an animation on behalf of its 1750 * children and should therefore not cancel invalidate requests, even if they 1751 * lie outside of this view's bounds. 1752 * 1753 * {@hide} 1754 */ 1755 static final int PFLAG_DRAW_ANIMATION = 0x00000040; 1756 /** {@hide} */ 1757 static final int PFLAG_SKIP_DRAW = 0x00000080; 1758 /** {@hide} */ 1759 static final int PFLAG_REQUEST_TRANSPARENT_REGIONS = 0x00000200; 1760 /** {@hide} */ 1761 static final int PFLAG_DRAWABLE_STATE_DIRTY = 0x00000400; 1762 /** {@hide} */ 1763 static final int PFLAG_MEASURED_DIMENSION_SET = 0x00000800; 1764 /** {@hide} */ 1765 static final int PFLAG_FORCE_LAYOUT = 0x00001000; 1766 /** {@hide} */ 1767 static final int PFLAG_LAYOUT_REQUIRED = 0x00002000; 1768 1769 private static final int PFLAG_PRESSED = 0x00004000; 1770 1771 /** {@hide} */ 1772 static final int PFLAG_DRAWING_CACHE_VALID = 0x00008000; 1773 /** 1774 * Flag used to indicate that this view should be drawn once more (and only once 1775 * more) after its animation has completed. 1776 * {@hide} 1777 */ 1778 static final int PFLAG_ANIMATION_STARTED = 0x00010000; 1779 1780 private static final int PFLAG_SAVE_STATE_CALLED = 0x00020000; 1781 1782 /** 1783 * Indicates that the View returned true when onSetAlpha() was called and that 1784 * the alpha must be restored. 1785 * {@hide} 1786 */ 1787 static final int PFLAG_ALPHA_SET = 0x00040000; 1788 1789 /** 1790 * Set by {@link #setScrollContainer(boolean)}. 1791 */ 1792 static final int PFLAG_SCROLL_CONTAINER = 0x00080000; 1793 1794 /** 1795 * Set by {@link #setScrollContainer(boolean)}. 1796 */ 1797 static final int PFLAG_SCROLL_CONTAINER_ADDED = 0x00100000; 1798 1799 /** 1800 * View flag indicating whether this view was invalidated (fully or partially.) 1801 * 1802 * @hide 1803 */ 1804 static final int PFLAG_DIRTY = 0x00200000; 1805 1806 /** 1807 * View flag indicating whether this view was invalidated by an opaque 1808 * invalidate request. 1809 * 1810 * @hide 1811 */ 1812 static final int PFLAG_DIRTY_OPAQUE = 0x00400000; 1813 1814 /** 1815 * Mask for {@link #PFLAG_DIRTY} and {@link #PFLAG_DIRTY_OPAQUE}. 1816 * 1817 * @hide 1818 */ 1819 static final int PFLAG_DIRTY_MASK = 0x00600000; 1820 1821 /** 1822 * Indicates whether the background is opaque. 1823 * 1824 * @hide 1825 */ 1826 static final int PFLAG_OPAQUE_BACKGROUND = 0x00800000; 1827 1828 /** 1829 * Indicates whether the scrollbars are opaque. 1830 * 1831 * @hide 1832 */ 1833 static final int PFLAG_OPAQUE_SCROLLBARS = 0x01000000; 1834 1835 /** 1836 * Indicates whether the view is opaque. 1837 * 1838 * @hide 1839 */ 1840 static final int PFLAG_OPAQUE_MASK = 0x01800000; 1841 1842 /** 1843 * Indicates a prepressed state; 1844 * the short time between ACTION_DOWN and recognizing 1845 * a 'real' press. Prepressed is used to recognize quick taps 1846 * even when they are shorter than ViewConfiguration.getTapTimeout(). 1847 * 1848 * @hide 1849 */ 1850 private static final int PFLAG_PREPRESSED = 0x02000000; 1851 1852 /** 1853 * Indicates whether the view is temporarily detached. 1854 * 1855 * @hide 1856 */ 1857 static final int PFLAG_CANCEL_NEXT_UP_EVENT = 0x04000000; 1858 1859 /** 1860 * Indicates that we should awaken scroll bars once attached 1861 * 1862 * PLEASE NOTE: This flag is now unused as we now send onVisibilityChanged 1863 * during window attachment and it is no longer needed. Feel free to repurpose it. 1864 * 1865 * @hide 1866 */ 1867 private static final int PFLAG_AWAKEN_SCROLL_BARS_ON_ATTACH = 0x08000000; 1868 1869 /** 1870 * Indicates that the view has received HOVER_ENTER. Cleared on HOVER_EXIT. 1871 * @hide 1872 */ 1873 private static final int PFLAG_HOVERED = 0x10000000; 1874 1875 /** 1876 * no longer needed, should be reused 1877 */ 1878 private static final int PFLAG_DOES_NOTHING_REUSE_PLEASE = 0x20000000; 1879 1880 /** {@hide} */ 1881 static final int PFLAG_ACTIVATED = 0x40000000; 1882 1883 /** 1884 * Indicates that this view was specifically invalidated, not just dirtied because some 1885 * child view was invalidated. The flag is used to determine when we need to recreate 1886 * a view's display list (as opposed to just returning a reference to its existing 1887 * display list). 1888 * 1889 * @hide 1890 */ 1891 static final int PFLAG_INVALIDATED = 0x80000000; 1892 1893 /** 1894 * Masks for mPrivateFlags2, as generated by dumpFlags(): 1895 * 1896 * |-------|-------|-------|-------| 1897 * 1 PFLAG2_DRAG_CAN_ACCEPT 1898 * 1 PFLAG2_DRAG_HOVERED 1899 * 11 PFLAG2_LAYOUT_DIRECTION_MASK 1900 * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL 1901 * 1 PFLAG2_LAYOUT_DIRECTION_RESOLVED 1902 * 11 PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK 1903 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[1] 1904 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[2] 1905 * 11 PFLAG2_TEXT_DIRECTION_FLAGS[3] 1906 * 1 PFLAG2_TEXT_DIRECTION_FLAGS[4] 1907 * 1 1 PFLAG2_TEXT_DIRECTION_FLAGS[5] 1908 * 11 PFLAG2_TEXT_DIRECTION_FLAGS[6] 1909 * 111 PFLAG2_TEXT_DIRECTION_FLAGS[7] 1910 * 111 PFLAG2_TEXT_DIRECTION_MASK 1911 * 1 PFLAG2_TEXT_DIRECTION_RESOLVED 1912 * 1 PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT 1913 * 111 PFLAG2_TEXT_DIRECTION_RESOLVED_MASK 1914 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[1] 1915 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[2] 1916 * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[3] 1917 * 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[4] 1918 * 1 1 PFLAG2_TEXT_ALIGNMENT_FLAGS[5] 1919 * 11 PFLAG2_TEXT_ALIGNMENT_FLAGS[6] 1920 * 111 PFLAG2_TEXT_ALIGNMENT_MASK 1921 * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED 1922 * 1 PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT 1923 * 111 PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK 1924 * 111 PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK 1925 * 11 PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK 1926 * 1 PFLAG2_ACCESSIBILITY_FOCUSED 1927 * 1 PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED 1928 * 1 PFLAG2_VIEW_QUICK_REJECTED 1929 * 1 PFLAG2_PADDING_RESOLVED 1930 * 1 PFLAG2_DRAWABLE_RESOLVED 1931 * 1 PFLAG2_HAS_TRANSIENT_STATE 1932 * |-------|-------|-------|-------| 1933 */ 1934 1935 /** 1936 * Indicates that this view has reported that it can accept the current drag's content. 1937 * Cleared when the drag operation concludes. 1938 * @hide 1939 */ 1940 static final int PFLAG2_DRAG_CAN_ACCEPT = 0x00000001; 1941 1942 /** 1943 * Indicates that this view is currently directly under the drag location in a 1944 * drag-and-drop operation involving content that it can accept. Cleared when 1945 * the drag exits the view, or when the drag operation concludes. 1946 * @hide 1947 */ 1948 static final int PFLAG2_DRAG_HOVERED = 0x00000002; 1949 1950 /** @hide */ 1951 @IntDef({ 1952 LAYOUT_DIRECTION_LTR, 1953 LAYOUT_DIRECTION_RTL, 1954 LAYOUT_DIRECTION_INHERIT, 1955 LAYOUT_DIRECTION_LOCALE 1956 }) 1957 @Retention(RetentionPolicy.SOURCE) 1958 // Not called LayoutDirection to avoid conflict with android.util.LayoutDirection 1959 public @interface LayoutDir {} 1960 1961 /** @hide */ 1962 @IntDef({ 1963 LAYOUT_DIRECTION_LTR, 1964 LAYOUT_DIRECTION_RTL 1965 }) 1966 @Retention(RetentionPolicy.SOURCE) 1967 public @interface ResolvedLayoutDir {} 1968 1969 /** 1970 * A flag to indicate that the layout direction of this view has not been defined yet. 1971 * @hide 1972 */ 1973 public static final int LAYOUT_DIRECTION_UNDEFINED = LayoutDirection.UNDEFINED; 1974 1975 /** 1976 * Horizontal layout direction of this view is from Left to Right. 1977 * Use with {@link #setLayoutDirection}. 1978 */ 1979 public static final int LAYOUT_DIRECTION_LTR = LayoutDirection.LTR; 1980 1981 /** 1982 * Horizontal layout direction of this view is from Right to Left. 1983 * Use with {@link #setLayoutDirection}. 1984 */ 1985 public static final int LAYOUT_DIRECTION_RTL = LayoutDirection.RTL; 1986 1987 /** 1988 * Horizontal layout direction of this view is inherited from its parent. 1989 * Use with {@link #setLayoutDirection}. 1990 */ 1991 public static final int LAYOUT_DIRECTION_INHERIT = LayoutDirection.INHERIT; 1992 1993 /** 1994 * Horizontal layout direction of this view is from deduced from the default language 1995 * script for the locale. Use with {@link #setLayoutDirection}. 1996 */ 1997 public static final int LAYOUT_DIRECTION_LOCALE = LayoutDirection.LOCALE; 1998 1999 /** 2000 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 2001 * @hide 2002 */ 2003 static final int PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT = 2; 2004 2005 /** 2006 * Mask for use with private flags indicating bits used for horizontal layout direction. 2007 * @hide 2008 */ 2009 static final int PFLAG2_LAYOUT_DIRECTION_MASK = 0x00000003 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 2010 2011 /** 2012 * Indicates whether the view horizontal layout direction has been resolved and drawn to the 2013 * right-to-left direction. 2014 * @hide 2015 */ 2016 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_RTL = 4 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 2017 2018 /** 2019 * Indicates whether the view horizontal layout direction has been resolved. 2020 * @hide 2021 */ 2022 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED = 8 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 2023 2024 /** 2025 * Mask for use with private flags indicating bits used for resolved horizontal layout direction. 2026 * @hide 2027 */ 2028 static final int PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK = 0x0000000C 2029 << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT; 2030 2031 /* 2032 * Array of horizontal layout direction flags for mapping attribute "layoutDirection" to correct 2033 * flag value. 2034 * @hide 2035 */ 2036 private static final int[] LAYOUT_DIRECTION_FLAGS = { 2037 LAYOUT_DIRECTION_LTR, 2038 LAYOUT_DIRECTION_RTL, 2039 LAYOUT_DIRECTION_INHERIT, 2040 LAYOUT_DIRECTION_LOCALE 2041 }; 2042 2043 /** 2044 * Default horizontal layout direction. 2045 */ 2046 private static final int LAYOUT_DIRECTION_DEFAULT = LAYOUT_DIRECTION_INHERIT; 2047 2048 /** 2049 * Default horizontal layout direction. 2050 * @hide 2051 */ 2052 static final int LAYOUT_DIRECTION_RESOLVED_DEFAULT = LAYOUT_DIRECTION_LTR; 2053 2054 /** 2055 * Text direction is inherited through {@link ViewGroup} 2056 */ 2057 public static final int TEXT_DIRECTION_INHERIT = 0; 2058 2059 /** 2060 * Text direction is using "first strong algorithm". The first strong directional character 2061 * determines the paragraph direction. If there is no strong directional character, the 2062 * paragraph direction is the view's resolved layout direction. 2063 */ 2064 public static final int TEXT_DIRECTION_FIRST_STRONG = 1; 2065 2066 /** 2067 * Text direction is using "any-RTL" algorithm. The paragraph direction is RTL if it contains 2068 * any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. 2069 * If there are neither, the paragraph direction is the view's resolved layout direction. 2070 */ 2071 public static final int TEXT_DIRECTION_ANY_RTL = 2; 2072 2073 /** 2074 * Text direction is forced to LTR. 2075 */ 2076 public static final int TEXT_DIRECTION_LTR = 3; 2077 2078 /** 2079 * Text direction is forced to RTL. 2080 */ 2081 public static final int TEXT_DIRECTION_RTL = 4; 2082 2083 /** 2084 * Text direction is coming from the system Locale. 2085 */ 2086 public static final int TEXT_DIRECTION_LOCALE = 5; 2087 2088 /** 2089 * Text direction is using "first strong algorithm". The first strong directional character 2090 * determines the paragraph direction. If there is no strong directional character, the 2091 * paragraph direction is LTR. 2092 */ 2093 public static final int TEXT_DIRECTION_FIRST_STRONG_LTR = 6; 2094 2095 /** 2096 * Text direction is using "first strong algorithm". The first strong directional character 2097 * determines the paragraph direction. If there is no strong directional character, the 2098 * paragraph direction is RTL. 2099 */ 2100 public static final int TEXT_DIRECTION_FIRST_STRONG_RTL = 7; 2101 2102 /** 2103 * Default text direction is inherited 2104 */ 2105 private static final int TEXT_DIRECTION_DEFAULT = TEXT_DIRECTION_INHERIT; 2106 2107 /** 2108 * Default resolved text direction 2109 * @hide 2110 */ 2111 static final int TEXT_DIRECTION_RESOLVED_DEFAULT = TEXT_DIRECTION_FIRST_STRONG; 2112 2113 /** 2114 * Bit shift to get the horizontal layout direction. (bits after LAYOUT_DIRECTION_RESOLVED) 2115 * @hide 2116 */ 2117 static final int PFLAG2_TEXT_DIRECTION_MASK_SHIFT = 6; 2118 2119 /** 2120 * Mask for use with private flags indicating bits used for text direction. 2121 * @hide 2122 */ 2123 static final int PFLAG2_TEXT_DIRECTION_MASK = 0x00000007 2124 << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 2125 2126 /** 2127 * Array of text direction flags for mapping attribute "textDirection" to correct 2128 * flag value. 2129 * @hide 2130 */ 2131 private static final int[] PFLAG2_TEXT_DIRECTION_FLAGS = { 2132 TEXT_DIRECTION_INHERIT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2133 TEXT_DIRECTION_FIRST_STRONG << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2134 TEXT_DIRECTION_ANY_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2135 TEXT_DIRECTION_LTR << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2136 TEXT_DIRECTION_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2137 TEXT_DIRECTION_LOCALE << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2138 TEXT_DIRECTION_FIRST_STRONG_LTR << PFLAG2_TEXT_DIRECTION_MASK_SHIFT, 2139 TEXT_DIRECTION_FIRST_STRONG_RTL << PFLAG2_TEXT_DIRECTION_MASK_SHIFT 2140 }; 2141 2142 /** 2143 * Indicates whether the view text direction has been resolved. 2144 * @hide 2145 */ 2146 static final int PFLAG2_TEXT_DIRECTION_RESOLVED = 0x00000008 2147 << PFLAG2_TEXT_DIRECTION_MASK_SHIFT; 2148 2149 /** 2150 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 2151 * @hide 2152 */ 2153 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT = 10; 2154 2155 /** 2156 * Mask for use with private flags indicating bits used for resolved text direction. 2157 * @hide 2158 */ 2159 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_MASK = 0x00000007 2160 << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 2161 2162 /** 2163 * Indicates whether the view text direction has been resolved to the "first strong" heuristic. 2164 * @hide 2165 */ 2166 static final int PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT = 2167 TEXT_DIRECTION_RESOLVED_DEFAULT << PFLAG2_TEXT_DIRECTION_RESOLVED_MASK_SHIFT; 2168 2169 /** @hide */ 2170 @IntDef({ 2171 TEXT_ALIGNMENT_INHERIT, 2172 TEXT_ALIGNMENT_GRAVITY, 2173 TEXT_ALIGNMENT_CENTER, 2174 TEXT_ALIGNMENT_TEXT_START, 2175 TEXT_ALIGNMENT_TEXT_END, 2176 TEXT_ALIGNMENT_VIEW_START, 2177 TEXT_ALIGNMENT_VIEW_END 2178 }) 2179 @Retention(RetentionPolicy.SOURCE) 2180 public @interface TextAlignment {} 2181 2182 /** 2183 * Default text alignment. The text alignment of this View is inherited from its parent. 2184 * Use with {@link #setTextAlignment(int)} 2185 */ 2186 public static final int TEXT_ALIGNMENT_INHERIT = 0; 2187 2188 /** 2189 * Default for the root view. The gravity determines the text alignment, ALIGN_NORMAL, 2190 * ALIGN_CENTER, or ALIGN_OPPOSITE, which are relative to each paragraphs text direction. 2191 * 2192 * Use with {@link #setTextAlignment(int)} 2193 */ 2194 public static final int TEXT_ALIGNMENT_GRAVITY = 1; 2195 2196 /** 2197 * Align to the start of the paragraph, e.g. ALIGN_NORMAL. 2198 * 2199 * Use with {@link #setTextAlignment(int)} 2200 */ 2201 public static final int TEXT_ALIGNMENT_TEXT_START = 2; 2202 2203 /** 2204 * Align to the end of the paragraph, e.g. ALIGN_OPPOSITE. 2205 * 2206 * Use with {@link #setTextAlignment(int)} 2207 */ 2208 public static final int TEXT_ALIGNMENT_TEXT_END = 3; 2209 2210 /** 2211 * Center the paragraph, e.g. ALIGN_CENTER. 2212 * 2213 * Use with {@link #setTextAlignment(int)} 2214 */ 2215 public static final int TEXT_ALIGNMENT_CENTER = 4; 2216 2217 /** 2218 * Align to the start of the view, which is ALIGN_LEFT if the views resolved 2219 * layoutDirection is LTR, and ALIGN_RIGHT otherwise. 2220 * 2221 * Use with {@link #setTextAlignment(int)} 2222 */ 2223 public static final int TEXT_ALIGNMENT_VIEW_START = 5; 2224 2225 /** 2226 * Align to the end of the view, which is ALIGN_RIGHT if the views resolved 2227 * layoutDirection is LTR, and ALIGN_LEFT otherwise. 2228 * 2229 * Use with {@link #setTextAlignment(int)} 2230 */ 2231 public static final int TEXT_ALIGNMENT_VIEW_END = 6; 2232 2233 /** 2234 * Default text alignment is inherited 2235 */ 2236 private static final int TEXT_ALIGNMENT_DEFAULT = TEXT_ALIGNMENT_GRAVITY; 2237 2238 /** 2239 * Default resolved text alignment 2240 * @hide 2241 */ 2242 static final int TEXT_ALIGNMENT_RESOLVED_DEFAULT = TEXT_ALIGNMENT_GRAVITY; 2243 2244 /** 2245 * Bit shift to get the horizontal layout direction. (bits after DRAG_HOVERED) 2246 * @hide 2247 */ 2248 static final int PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT = 13; 2249 2250 /** 2251 * Mask for use with private flags indicating bits used for text alignment. 2252 * @hide 2253 */ 2254 static final int PFLAG2_TEXT_ALIGNMENT_MASK = 0x00000007 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 2255 2256 /** 2257 * Array of text direction flags for mapping attribute "textAlignment" to correct 2258 * flag value. 2259 * @hide 2260 */ 2261 private static final int[] PFLAG2_TEXT_ALIGNMENT_FLAGS = { 2262 TEXT_ALIGNMENT_INHERIT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2263 TEXT_ALIGNMENT_GRAVITY << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2264 TEXT_ALIGNMENT_TEXT_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2265 TEXT_ALIGNMENT_TEXT_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2266 TEXT_ALIGNMENT_CENTER << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2267 TEXT_ALIGNMENT_VIEW_START << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT, 2268 TEXT_ALIGNMENT_VIEW_END << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT 2269 }; 2270 2271 /** 2272 * Indicates whether the view text alignment has been resolved. 2273 * @hide 2274 */ 2275 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED = 0x00000008 << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT; 2276 2277 /** 2278 * Bit shift to get the resolved text alignment. 2279 * @hide 2280 */ 2281 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT = 17; 2282 2283 /** 2284 * Mask for use with private flags indicating bits used for text alignment. 2285 * @hide 2286 */ 2287 static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK = 0x00000007 2288 << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 2289 2290 /** 2291 * Indicates whether if the view text alignment has been resolved to gravity 2292 */ 2293 private static final int PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT = 2294 TEXT_ALIGNMENT_RESOLVED_DEFAULT << PFLAG2_TEXT_ALIGNMENT_RESOLVED_MASK_SHIFT; 2295 2296 // Accessiblity constants for mPrivateFlags2 2297 2298 /** 2299 * Shift for the bits in {@link #mPrivateFlags2} related to the 2300 * "importantForAccessibility" attribute. 2301 */ 2302 static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT = 20; 2303 2304 /** 2305 * Automatically determine whether a view is important for accessibility. 2306 */ 2307 public static final int IMPORTANT_FOR_ACCESSIBILITY_AUTO = 0x00000000; 2308 2309 /** 2310 * The view is important for accessibility. 2311 */ 2312 public static final int IMPORTANT_FOR_ACCESSIBILITY_YES = 0x00000001; 2313 2314 /** 2315 * The view is not important for accessibility. 2316 */ 2317 public static final int IMPORTANT_FOR_ACCESSIBILITY_NO = 0x00000002; 2318 2319 /** 2320 * The view is not important for accessibility, nor are any of its 2321 * descendant views. 2322 */ 2323 public static final int IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS = 0x00000004; 2324 2325 /** 2326 * The default whether the view is important for accessibility. 2327 */ 2328 static final int IMPORTANT_FOR_ACCESSIBILITY_DEFAULT = IMPORTANT_FOR_ACCESSIBILITY_AUTO; 2329 2330 /** 2331 * Mask for obtainig the bits which specify how to determine 2332 * whether a view is important for accessibility. 2333 */ 2334 static final int PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_MASK = (IMPORTANT_FOR_ACCESSIBILITY_AUTO 2335 | IMPORTANT_FOR_ACCESSIBILITY_YES | IMPORTANT_FOR_ACCESSIBILITY_NO 2336 | IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) 2337 << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT; 2338 2339 /** 2340 * Shift for the bits in {@link #mPrivateFlags2} related to the 2341 * "accessibilityLiveRegion" attribute. 2342 */ 2343 static final int PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT = 23; 2344 2345 /** 2346 * Live region mode specifying that accessibility services should not 2347 * automatically announce changes to this view. This is the default live 2348 * region mode for most views. 2349 * <p> 2350 * Use with {@link #setAccessibilityLiveRegion(int)}. 2351 */ 2352 public static final int ACCESSIBILITY_LIVE_REGION_NONE = 0x00000000; 2353 2354 /** 2355 * Live region mode specifying that accessibility services should announce 2356 * changes to this view. 2357 * <p> 2358 * Use with {@link #setAccessibilityLiveRegion(int)}. 2359 */ 2360 public static final int ACCESSIBILITY_LIVE_REGION_POLITE = 0x00000001; 2361 2362 /** 2363 * Live region mode specifying that accessibility services should interrupt 2364 * ongoing speech to immediately announce changes to this view. 2365 * <p> 2366 * Use with {@link #setAccessibilityLiveRegion(int)}. 2367 */ 2368 public static final int ACCESSIBILITY_LIVE_REGION_ASSERTIVE = 0x00000002; 2369 2370 /** 2371 * The default whether the view is important for accessibility. 2372 */ 2373 static final int ACCESSIBILITY_LIVE_REGION_DEFAULT = ACCESSIBILITY_LIVE_REGION_NONE; 2374 2375 /** 2376 * Mask for obtaining the bits which specify a view's accessibility live 2377 * region mode. 2378 */ 2379 static final int PFLAG2_ACCESSIBILITY_LIVE_REGION_MASK = (ACCESSIBILITY_LIVE_REGION_NONE 2380 | ACCESSIBILITY_LIVE_REGION_POLITE | ACCESSIBILITY_LIVE_REGION_ASSERTIVE) 2381 << PFLAG2_ACCESSIBILITY_LIVE_REGION_SHIFT; 2382 2383 /** 2384 * Flag indicating whether a view has accessibility focus. 2385 */ 2386 static final int PFLAG2_ACCESSIBILITY_FOCUSED = 0x04000000; 2387 2388 /** 2389 * Flag whether the accessibility state of the subtree rooted at this view changed. 2390 */ 2391 static final int PFLAG2_SUBTREE_ACCESSIBILITY_STATE_CHANGED = 0x08000000; 2392 2393 /** 2394 * Flag indicating whether a view failed the quickReject() check in draw(). This condition 2395 * is used to check whether later changes to the view's transform should invalidate the 2396 * view to force the quickReject test to run again. 2397 */ 2398 static final int PFLAG2_VIEW_QUICK_REJECTED = 0x10000000; 2399 2400 /** 2401 * Flag indicating that start/end padding has been resolved into left/right padding 2402 * for use in measurement, layout, drawing, etc. This is set by {@link #resolvePadding()} 2403 * and checked by {@link #measure(int, int)} to determine if padding needs to be resolved 2404 * during measurement. In some special cases this is required such as when an adapter-based 2405 * view measures prospective children without attaching them to a window. 2406 */ 2407 static final int PFLAG2_PADDING_RESOLVED = 0x20000000; 2408 2409 /** 2410 * Flag indicating that the start/end drawables has been resolved into left/right ones. 2411 */ 2412 static final int PFLAG2_DRAWABLE_RESOLVED = 0x40000000; 2413 2414 /** 2415 * Indicates that the view is tracking some sort of transient state 2416 * that the app should not need to be aware of, but that the framework 2417 * should take special care to preserve. 2418 */ 2419 static final int PFLAG2_HAS_TRANSIENT_STATE = 0x80000000; 2420 2421 /** 2422 * Group of bits indicating that RTL properties resolution is done. 2423 */ 2424 static final int ALL_RTL_PROPERTIES_RESOLVED = PFLAG2_LAYOUT_DIRECTION_RESOLVED | 2425 PFLAG2_TEXT_DIRECTION_RESOLVED | 2426 PFLAG2_TEXT_ALIGNMENT_RESOLVED | 2427 PFLAG2_PADDING_RESOLVED | 2428 PFLAG2_DRAWABLE_RESOLVED; 2429 2430 // There are a couple of flags left in mPrivateFlags2 2431 2432 /* End of masks for mPrivateFlags2 */ 2433 2434 /** 2435 * Masks for mPrivateFlags3, as generated by dumpFlags(): 2436 * 2437 * |-------|-------|-------|-------| 2438 * 1 PFLAG3_VIEW_IS_ANIMATING_TRANSFORM 2439 * 1 PFLAG3_VIEW_IS_ANIMATING_ALPHA 2440 * 1 PFLAG3_IS_LAID_OUT 2441 * 1 PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT 2442 * 1 PFLAG3_CALLED_SUPER 2443 * 1 PFLAG3_APPLYING_INSETS 2444 * 1 PFLAG3_FITTING_SYSTEM_WINDOWS 2445 * 1 PFLAG3_NESTED_SCROLLING_ENABLED 2446 * 1 PFLAG3_SCROLL_INDICATOR_TOP 2447 * 1 PFLAG3_SCROLL_INDICATOR_BOTTOM 2448 * 1 PFLAG3_SCROLL_INDICATOR_LEFT 2449 * 1 PFLAG3_SCROLL_INDICATOR_RIGHT 2450 * 1 PFLAG3_SCROLL_INDICATOR_START 2451 * 1 PFLAG3_SCROLL_INDICATOR_END 2452 * 1 PFLAG3_ASSIST_BLOCKED 2453 * 1 PFLAG3_POINTER_ICON_NULL 2454 * 1 PFLAG3_POINTER_ICON_VALUE_START 2455 * 11111111 PFLAG3_POINTER_ICON_MASK 2456 * 1 PFLAG3_OVERLAPPING_RENDERING_FORCED_VALUE 2457 * 1 PFLAG3_HAS_OVERLAPPING_RENDERING_FORCED 2458 * 1 PFLAG3_TEMPORARY_DETACH 2459 * 1 PFLAG3_NO_REVEAL_ON_FOCUS 2460 * |-------|-------|-------|-------| 2461 */ 2462 2463 /** 2464 * Flag indicating that view has a transform animation set on it. This is used to track whether 2465 * an animation is cleared between successive frames, in order to tell the associated 2466 * DisplayList to clear its animation matrix. 2467 */ 2468 static final int PFLAG3_VIEW_IS_ANIMATING_TRANSFORM = 0x1; 2469 2470 /** 2471 * Flag indicating that view has an alpha animation set on it. This is used to track whether an 2472 * animation is cleared between successive frames, in order to tell the associated 2473 * DisplayList to restore its alpha value. 2474 */ 2475 static final int PFLAG3_VIEW_IS_ANIMATING_ALPHA = 0x2; 2476 2477 /** 2478 * Flag indicating that the view has been through at least one layout since it 2479 * was last attached to a window. 2480 */ 2481 static final int PFLAG3_IS_LAID_OUT = 0x4; 2482 2483 /** 2484 * Flag indicating that a call to measure() was skipped and should be done 2485 * instead when layout() is invoked. 2486 */ 2487 static final int PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT = 0x8; 2488 2489 /** 2490 * Flag indicating that an overridden method correctly called down to 2491 * the superclass implementation as required by the API spec. 2492 */ 2493 static final int PFLAG3_CALLED_SUPER = 0x10; 2494 2495 /** 2496 * Flag indicating that we're in the process of applying window insets. 2497 */ 2498 static final int PFLAG3_APPLYING_INSETS = 0x20; 2499 2500 /** 2501 * Flag indicating that we're in the process of fitting system windows using the old method. 2502 */ 2503 static final int PFLAG3_FITTING_SYSTEM_WINDOWS = 0x40; 2504 2505 /** 2506 * Flag indicating that nested scrolling is enabled for this view. 2507 * The view will optionally cooperate with views up its parent chain to allow for 2508 * integrated nested scrolling along the same axis. 2509 */ 2510 static final int PFLAG3_NESTED_SCROLLING_ENABLED = 0x80; 2511 2512 /** 2513 * Flag indicating that the bottom scroll indicator should be displayed 2514 * when this view can scroll up. 2515 */ 2516 static final int PFLAG3_SCROLL_INDICATOR_TOP = 0x0100; 2517 2518 /** 2519 * Flag indicating that the bottom scroll indicator should be displayed 2520 * when this view can scroll down. 2521 */ 2522 static final int PFLAG3_SCROLL_INDICATOR_BOTTOM = 0x0200; 2523 2524 /** 2525 * Flag indicating that the left scroll indicator should be displayed 2526 * when this view can scroll left. 2527 */ 2528 static final int PFLAG3_SCROLL_INDICATOR_LEFT = 0x0400; 2529 2530 /** 2531 * Flag indicating that the right scroll indicator should be displayed 2532 * when this view can scroll right. 2533 */ 2534 static final int PFLAG3_SCROLL_INDICATOR_RIGHT = 0x0800; 2535 2536 /** 2537 * Flag indicating that the start scroll indicator should be displayed 2538 * when this view can scroll in the start direction. 2539 */ 2540 static final int PFLAG3_SCROLL_INDICATOR_START = 0x1000; 2541 2542 /** 2543 * Flag indicating that the end scroll indicator should be displayed 2544 * when this view can scroll in the end direction. 2545 */ 2546 static final int PFLAG3_SCROLL_INDICATOR_END = 0x2000; 2547 2548 static final int DRAG_MASK = PFLAG2_DRAG_CAN_ACCEPT | PFLAG2_DRAG_HOVERED; 2549 2550 static final int SCROLL_INDICATORS_NONE = 0x0000; 2551 2552 /** 2553 * Mask for use with setFlags indicating bits used for indicating which 2554 * scroll indicators are enabled. 2555 */ 2556 static final int SCROLL_INDICATORS_PFLAG3_MASK = PFLAG3_SCROLL_INDICATOR_TOP 2557 | PFLAG3_SCROLL_INDICATOR_BOTTOM | PFLAG3_SCROLL_INDICATOR_LEFT 2558 | PFLAG3_SCROLL_INDICATOR_RIGHT | PFLAG3_SCROLL_INDICATOR_START 2559 | PFLAG3_SCROLL_INDICATOR_END; 2560 2561 /** 2562 * Left-shift required to translate between public scroll indicator flags 2563 * and internal PFLAGS3 flags. When used as a right-shift, translates 2564 * PFLAGS3 flags to public flags. 2565 */ 2566 static final int SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT = 8; 2567 2568 /** @hide */ 2569 @Retention(RetentionPolicy.SOURCE) 2570 @IntDef(flag = true, 2571 value = { 2572 SCROLL_INDICATOR_TOP, 2573 SCROLL_INDICATOR_BOTTOM, 2574 SCROLL_INDICATOR_LEFT, 2575 SCROLL_INDICATOR_RIGHT, 2576 SCROLL_INDICATOR_START, 2577 SCROLL_INDICATOR_END, 2578 }) 2579 public @interface ScrollIndicators {} 2580 2581 /** 2582 * Scroll indicator direction for the top edge of the view. 2583 * 2584 * @see #setScrollIndicators(int) 2585 * @see #setScrollIndicators(int, int) 2586 * @see #getScrollIndicators() 2587 */ 2588 public static final int SCROLL_INDICATOR_TOP = 2589 PFLAG3_SCROLL_INDICATOR_TOP >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2590 2591 /** 2592 * Scroll indicator direction for the bottom edge of the view. 2593 * 2594 * @see #setScrollIndicators(int) 2595 * @see #setScrollIndicators(int, int) 2596 * @see #getScrollIndicators() 2597 */ 2598 public static final int SCROLL_INDICATOR_BOTTOM = 2599 PFLAG3_SCROLL_INDICATOR_BOTTOM >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2600 2601 /** 2602 * Scroll indicator direction for the left edge of the view. 2603 * 2604 * @see #setScrollIndicators(int) 2605 * @see #setScrollIndicators(int, int) 2606 * @see #getScrollIndicators() 2607 */ 2608 public static final int SCROLL_INDICATOR_LEFT = 2609 PFLAG3_SCROLL_INDICATOR_LEFT >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2610 2611 /** 2612 * Scroll indicator direction for the right edge of the view. 2613 * 2614 * @see #setScrollIndicators(int) 2615 * @see #setScrollIndicators(int, int) 2616 * @see #getScrollIndicators() 2617 */ 2618 public static final int SCROLL_INDICATOR_RIGHT = 2619 PFLAG3_SCROLL_INDICATOR_RIGHT >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2620 2621 /** 2622 * Scroll indicator direction for the starting edge of the view. 2623 * <p> 2624 * Resolved according to the view's layout direction, see 2625 * {@link #getLayoutDirection()} for more information. 2626 * 2627 * @see #setScrollIndicators(int) 2628 * @see #setScrollIndicators(int, int) 2629 * @see #getScrollIndicators() 2630 */ 2631 public static final int SCROLL_INDICATOR_START = 2632 PFLAG3_SCROLL_INDICATOR_START >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2633 2634 /** 2635 * Scroll indicator direction for the ending edge of the view. 2636 * <p> 2637 * Resolved according to the view's layout direction, see 2638 * {@link #getLayoutDirection()} for more information. 2639 * 2640 * @see #setScrollIndicators(int) 2641 * @see #setScrollIndicators(int, int) 2642 * @see #getScrollIndicators() 2643 */ 2644 public static final int SCROLL_INDICATOR_END = 2645 PFLAG3_SCROLL_INDICATOR_END >> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 2646 2647 /** 2648 * <p>Indicates that we are allowing {@link ViewStructure} to traverse 2649 * into this view.<p> 2650 */ 2651 static final int PFLAG3_ASSIST_BLOCKED = 0x4000; 2652 2653 /** 2654 * The mask for use with private flags indicating bits used for pointer icon shapes. 2655 */ 2656 static final int PFLAG3_POINTER_ICON_MASK = 0x7f8000; 2657 2658 /** 2659 * Left-shift used for pointer icon shape values in private flags. 2660 */ 2661 static final int PFLAG3_POINTER_ICON_LSHIFT = 15; 2662 2663 /** 2664 * Value indicating no specific pointer icons. 2665 */ 2666 private static final int PFLAG3_POINTER_ICON_NOT_SPECIFIED = 0 << PFLAG3_POINTER_ICON_LSHIFT; 2667 2668 /** 2669 * Value indicating {@link PointerIcon.TYPE_NULL}. 2670 */ 2671 private static final int PFLAG3_POINTER_ICON_NULL = 1 << PFLAG3_POINTER_ICON_LSHIFT; 2672 2673 /** 2674 * The base value for other pointer icon shapes. 2675 */ 2676 private static final int PFLAG3_POINTER_ICON_VALUE_START = 2 << PFLAG3_POINTER_ICON_LSHIFT; 2677 2678 /** 2679 * Whether this view has rendered elements that overlap (see {@link 2680 * #hasOverlappingRendering()}, {@link #forceHasOverlappingRendering(boolean)}, and 2681 * {@link #getHasOverlappingRendering()} ). The value in this bit is only valid when 2682 * PFLAG3_HAS_OVERLAPPING_RENDERING_FORCED has been set. Otherwise, the value is 2683 * determined by whatever {@link #hasOverlappingRendering()} returns. 2684 */ 2685 private static final int PFLAG3_OVERLAPPING_RENDERING_FORCED_VALUE = 0x800000; 2686 2687 /** 2688 * Whether {@link #forceHasOverlappingRendering(boolean)} has been called. When true, value 2689 * in PFLAG3_OVERLAPPING_RENDERING_FORCED_VALUE is valid. 2690 */ 2691 private static final int PFLAG3_HAS_OVERLAPPING_RENDERING_FORCED = 0x1000000; 2692 2693 /** 2694 * Flag indicating that the view is temporarily detached from the parent view. 2695 * 2696 * @see #onStartTemporaryDetach() 2697 * @see #onFinishTemporaryDetach() 2698 */ 2699 static final int PFLAG3_TEMPORARY_DETACH = 0x2000000; 2700 2701 /** 2702 * Flag indicating that the view does not wish to be revealed within its parent 2703 * hierarchy when it gains focus. Expressed in the negative since the historical 2704 * default behavior is to reveal on focus; this flag suppresses that behavior. 2705 * 2706 * @see #setRevealOnFocusHint(boolean) 2707 * @see #getRevealOnFocusHint() 2708 */ 2709 private static final int PFLAG3_NO_REVEAL_ON_FOCUS = 0x4000000; 2710 2711 /* End of masks for mPrivateFlags3 */ 2712 2713 /** 2714 * Always allow a user to over-scroll this view, provided it is a 2715 * view that can scroll. 2716 * 2717 * @see #getOverScrollMode() 2718 * @see #setOverScrollMode(int) 2719 */ 2720 public static final int OVER_SCROLL_ALWAYS = 0; 2721 2722 /** 2723 * Allow a user to over-scroll this view only if the content is large 2724 * enough to meaningfully scroll, provided it is a view that can scroll. 2725 * 2726 * @see #getOverScrollMode() 2727 * @see #setOverScrollMode(int) 2728 */ 2729 public static final int OVER_SCROLL_IF_CONTENT_SCROLLS = 1; 2730 2731 /** 2732 * Never allow a user to over-scroll this view. 2733 * 2734 * @see #getOverScrollMode() 2735 * @see #setOverScrollMode(int) 2736 */ 2737 public static final int OVER_SCROLL_NEVER = 2; 2738 2739 /** 2740 * Special constant for {@link #setSystemUiVisibility(int)}: View has 2741 * requested the system UI (status bar) to be visible (the default). 2742 * 2743 * @see #setSystemUiVisibility(int) 2744 */ 2745 public static final int SYSTEM_UI_FLAG_VISIBLE = 0; 2746 2747 /** 2748 * Flag for {@link #setSystemUiVisibility(int)}: View has requested the 2749 * system UI to enter an unobtrusive "low profile" mode. 2750 * 2751 * <p>This is for use in games, book readers, video players, or any other 2752 * "immersive" application where the usual system chrome is deemed too distracting. 2753 * 2754 * <p>In low profile mode, the status bar and/or navigation icons may dim. 2755 * 2756 * @see #setSystemUiVisibility(int) 2757 */ 2758 public static final int SYSTEM_UI_FLAG_LOW_PROFILE = 0x00000001; 2759 2760 /** 2761 * Flag for {@link #setSystemUiVisibility(int)}: View has requested that the 2762 * system navigation be temporarily hidden. 2763 * 2764 * <p>This is an even less obtrusive state than that called for by 2765 * {@link #SYSTEM_UI_FLAG_LOW_PROFILE}; on devices that draw essential navigation controls 2766 * (Home, Back, and the like) on screen, <code>SYSTEM_UI_FLAG_HIDE_NAVIGATION</code> will cause 2767 * those to disappear. This is useful (in conjunction with the 2768 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN FLAG_FULLSCREEN} and 2769 * {@link android.view.WindowManager.LayoutParams#FLAG_LAYOUT_IN_SCREEN FLAG_LAYOUT_IN_SCREEN} 2770 * window flags) for displaying content using every last pixel on the display. 2771 * 2772 * <p>There is a limitation: because navigation controls are so important, the least user 2773 * interaction will cause them to reappear immediately. When this happens, both 2774 * this flag and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be cleared automatically, 2775 * so that both elements reappear at the same time. 2776 * 2777 * @see #setSystemUiVisibility(int) 2778 */ 2779 public static final int SYSTEM_UI_FLAG_HIDE_NAVIGATION = 0x00000002; 2780 2781 /** 2782 * Flag for {@link #setSystemUiVisibility(int)}: View has requested to go 2783 * into the normal fullscreen mode so that its content can take over the screen 2784 * while still allowing the user to interact with the application. 2785 * 2786 * <p>This has the same visual effect as 2787 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN 2788 * WindowManager.LayoutParams.FLAG_FULLSCREEN}, 2789 * meaning that non-critical screen decorations (such as the status bar) will be 2790 * hidden while the user is in the View's window, focusing the experience on 2791 * that content. Unlike the window flag, if you are using ActionBar in 2792 * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY 2793 * Window.FEATURE_ACTION_BAR_OVERLAY}, then enabling this flag will also 2794 * hide the action bar. 2795 * 2796 * <p>This approach to going fullscreen is best used over the window flag when 2797 * it is a transient state -- that is, the application does this at certain 2798 * points in its user interaction where it wants to allow the user to focus 2799 * on content, but not as a continuous state. For situations where the application 2800 * would like to simply stay full screen the entire time (such as a game that 2801 * wants to take over the screen), the 2802 * {@link android.view.WindowManager.LayoutParams#FLAG_FULLSCREEN window flag} 2803 * is usually a better approach. The state set here will be removed by the system 2804 * in various situations (such as the user moving to another application) like 2805 * the other system UI states. 2806 * 2807 * <p>When using this flag, the application should provide some easy facility 2808 * for the user to go out of it. A common example would be in an e-book 2809 * reader, where tapping on the screen brings back whatever screen and UI 2810 * decorations that had been hidden while the user was immersed in reading 2811 * the book. 2812 * 2813 * @see #setSystemUiVisibility(int) 2814 */ 2815 public static final int SYSTEM_UI_FLAG_FULLSCREEN = 0x00000004; 2816 2817 /** 2818 * Flag for {@link #setSystemUiVisibility(int)}: When using other layout 2819 * flags, we would like a stable view of the content insets given to 2820 * {@link #fitSystemWindows(Rect)}. This means that the insets seen there 2821 * will always represent the worst case that the application can expect 2822 * as a continuous state. In the stock Android UI this is the space for 2823 * the system bar, nav bar, and status bar, but not more transient elements 2824 * such as an input method. 2825 * 2826 * The stable layout your UI sees is based on the system UI modes you can 2827 * switch to. That is, if you specify {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} 2828 * then you will get a stable layout for changes of the 2829 * {@link #SYSTEM_UI_FLAG_FULLSCREEN} mode; if you specify 2830 * {@link #SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN} and 2831 * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION}, then you can transition 2832 * to {@link #SYSTEM_UI_FLAG_FULLSCREEN} and {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} 2833 * with a stable layout. (Note that you should avoid using 2834 * {@link #SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION} by itself.) 2835 * 2836 * If you have set the window flag {@link WindowManager.LayoutParams#FLAG_FULLSCREEN} 2837 * to hide the status bar (instead of using {@link #SYSTEM_UI_FLAG_FULLSCREEN}), 2838 * then a hidden status bar will be considered a "stable" state for purposes 2839 * here. This allows your UI to continually hide the status bar, while still 2840 * using the system UI flags to hide the action bar while still retaining 2841 * a stable layout. Note that changing the window fullscreen flag will never 2842 * provide a stable layout for a clean transition. 2843 * 2844 * <p>If you are using ActionBar in 2845 * overlay mode with {@link Window#FEATURE_ACTION_BAR_OVERLAY 2846 * Window.FEATURE_ACTION_BAR_OVERLAY}, this flag will also impact the 2847 * insets it adds to those given to the application. 2848 */ 2849 public static final int SYSTEM_UI_FLAG_LAYOUT_STABLE = 0x00000100; 2850 2851 /** 2852 * Flag for {@link #setSystemUiVisibility(int)}: View would like its window 2853 * to be laid out as if it has requested 2854 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, even if it currently hasn't. This 2855 * allows it to avoid artifacts when switching in and out of that mode, at 2856 * the expense that some of its user interface may be covered by screen 2857 * decorations when they are shown. You can perform layout of your inner 2858 * UI elements to account for the navigation system UI through the 2859 * {@link #fitSystemWindows(Rect)} method. 2860 */ 2861 public static final int SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION = 0x00000200; 2862 2863 /** 2864 * Flag for {@link #setSystemUiVisibility(int)}: View would like its window 2865 * to be laid out as if it has requested 2866 * {@link #SYSTEM_UI_FLAG_FULLSCREEN}, even if it currently hasn't. This 2867 * allows it to avoid artifacts when switching in and out of that mode, at 2868 * the expense that some of its user interface may be covered by screen 2869 * decorations when they are shown. You can perform layout of your inner 2870 * UI elements to account for non-fullscreen system UI through the 2871 * {@link #fitSystemWindows(Rect)} method. 2872 */ 2873 public static final int SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN = 0x00000400; 2874 2875 /** 2876 * Flag for {@link #setSystemUiVisibility(int)}: View would like to remain interactive when 2877 * hiding the navigation bar with {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. If this flag is 2878 * not set, {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} will be force cleared by the system on any 2879 * user interaction. 2880 * <p>Since this flag is a modifier for {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, it only 2881 * has an effect when used in combination with that flag.</p> 2882 */ 2883 public static final int SYSTEM_UI_FLAG_IMMERSIVE = 0x00000800; 2884 2885 /** 2886 * Flag for {@link #setSystemUiVisibility(int)}: View would like to remain interactive when 2887 * hiding the status bar with {@link #SYSTEM_UI_FLAG_FULLSCREEN} and/or hiding the navigation 2888 * bar with {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}. Use this flag to create an immersive 2889 * experience while also hiding the system bars. If this flag is not set, 2890 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION} will be force cleared by the system on any user 2891 * interaction, and {@link #SYSTEM_UI_FLAG_FULLSCREEN} will be force-cleared by the system 2892 * if the user swipes from the top of the screen. 2893 * <p>When system bars are hidden in immersive mode, they can be revealed temporarily with 2894 * system gestures, such as swiping from the top of the screen. These transient system bars 2895 * will overlay apps content, may have some degree of transparency, and will automatically 2896 * hide after a short timeout. 2897 * </p><p>Since this flag is a modifier for {@link #SYSTEM_UI_FLAG_FULLSCREEN} and 2898 * {@link #SYSTEM_UI_FLAG_HIDE_NAVIGATION}, it only has an effect when used in combination 2899 * with one or both of those flags.</p> 2900 */ 2901 public static final int SYSTEM_UI_FLAG_IMMERSIVE_STICKY = 0x00001000; 2902 2903 /** 2904 * Flag for {@link #setSystemUiVisibility(int)}: Requests the status bar to draw in a mode that 2905 * is compatible with light status bar backgrounds. 2906 * 2907 * <p>For this to take effect, the window must request 2908 * {@link android.view.WindowManager.LayoutParams#FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS 2909 * FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS} but not 2910 * {@link android.view.WindowManager.LayoutParams#FLAG_TRANSLUCENT_STATUS 2911 * FLAG_TRANSLUCENT_STATUS}. 2912 * 2913 * @see android.R.attr#windowLightStatusBar 2914 */ 2915 public static final int SYSTEM_UI_FLAG_LIGHT_STATUS_BAR = 0x00002000; 2916 2917 /** 2918 * @deprecated Use {@link #SYSTEM_UI_FLAG_LOW_PROFILE} instead. 2919 */ 2920 public static final int STATUS_BAR_HIDDEN = SYSTEM_UI_FLAG_LOW_PROFILE; 2921 2922 /** 2923 * @deprecated Use {@link #SYSTEM_UI_FLAG_VISIBLE} instead. 2924 */ 2925 public static final int STATUS_BAR_VISIBLE = SYSTEM_UI_FLAG_VISIBLE; 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 make the status bar not expandable. Unless you also 2934 * set {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS}, new notifications will continue to show. 2935 */ 2936 public static final int STATUS_BAR_DISABLE_EXPAND = 0x00010000; 2937 2938 /** 2939 * @hide 2940 * 2941 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2942 * out of the public fields to keep the undefined bits out of the developer's way. 2943 * 2944 * Flag to hide notification icons and scrolling ticker text. 2945 */ 2946 public static final int STATUS_BAR_DISABLE_NOTIFICATION_ICONS = 0x00020000; 2947 2948 /** 2949 * @hide 2950 * 2951 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2952 * out of the public fields to keep the undefined bits out of the developer's way. 2953 * 2954 * Flag to disable incoming notification alerts. This will not block 2955 * icons, but it will block sound, vibrating and other visual or aural notifications. 2956 */ 2957 public static final int STATUS_BAR_DISABLE_NOTIFICATION_ALERTS = 0x00040000; 2958 2959 /** 2960 * @hide 2961 * 2962 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2963 * out of the public fields to keep the undefined bits out of the developer's way. 2964 * 2965 * Flag to hide only the scrolling ticker. Note that 2966 * {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS} implies 2967 * {@link #STATUS_BAR_DISABLE_NOTIFICATION_TICKER}. 2968 */ 2969 public static final int STATUS_BAR_DISABLE_NOTIFICATION_TICKER = 0x00080000; 2970 2971 /** 2972 * @hide 2973 * 2974 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2975 * out of the public fields to keep the undefined bits out of the developer's way. 2976 * 2977 * Flag to hide the center system info area. 2978 */ 2979 public static final int STATUS_BAR_DISABLE_SYSTEM_INFO = 0x00100000; 2980 2981 /** 2982 * @hide 2983 * 2984 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2985 * out of the public fields to keep the undefined bits out of the developer's way. 2986 * 2987 * Flag to hide only the home button. Don't use this 2988 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 2989 */ 2990 public static final int STATUS_BAR_DISABLE_HOME = 0x00200000; 2991 2992 /** 2993 * @hide 2994 * 2995 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 2996 * out of the public fields to keep the undefined bits out of the developer's way. 2997 * 2998 * Flag to hide only the back button. Don't use this 2999 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 3000 */ 3001 public static final int STATUS_BAR_DISABLE_BACK = 0x00400000; 3002 3003 /** 3004 * @hide 3005 * 3006 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 3007 * out of the public fields to keep the undefined bits out of the developer's way. 3008 * 3009 * Flag to hide only the clock. You might use this if your activity has 3010 * its own clock making the status bar's clock redundant. 3011 */ 3012 public static final int STATUS_BAR_DISABLE_CLOCK = 0x00800000; 3013 3014 /** 3015 * @hide 3016 * 3017 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 3018 * out of the public fields to keep the undefined bits out of the developer's way. 3019 * 3020 * Flag to hide only the recent apps button. Don't use this 3021 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 3022 */ 3023 public static final int STATUS_BAR_DISABLE_RECENT = 0x01000000; 3024 3025 /** 3026 * @hide 3027 * 3028 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 3029 * out of the public fields to keep the undefined bits out of the developer's way. 3030 * 3031 * Flag to disable the global search gesture. Don't use this 3032 * unless you're a special part of the system UI (i.e., setup wizard, keyguard). 3033 */ 3034 public static final int STATUS_BAR_DISABLE_SEARCH = 0x02000000; 3035 3036 /** 3037 * @hide 3038 * 3039 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 3040 * out of the public fields to keep the undefined bits out of the developer's way. 3041 * 3042 * Flag to specify that the status bar is displayed in transient mode. 3043 */ 3044 public static final int STATUS_BAR_TRANSIENT = 0x04000000; 3045 3046 /** 3047 * @hide 3048 * 3049 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 3050 * out of the public fields to keep the undefined bits out of the developer's way. 3051 * 3052 * Flag to specify that the navigation bar is displayed in transient mode. 3053 */ 3054 public static final int NAVIGATION_BAR_TRANSIENT = 0x08000000; 3055 3056 /** 3057 * @hide 3058 * 3059 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 3060 * out of the public fields to keep the undefined bits out of the developer's way. 3061 * 3062 * Flag to specify that the hidden status bar would like to be shown. 3063 */ 3064 public static final int STATUS_BAR_UNHIDE = 0x10000000; 3065 3066 /** 3067 * @hide 3068 * 3069 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 3070 * out of the public fields to keep the undefined bits out of the developer's way. 3071 * 3072 * Flag to specify that the hidden navigation bar would like to be shown. 3073 */ 3074 public static final int NAVIGATION_BAR_UNHIDE = 0x20000000; 3075 3076 /** 3077 * @hide 3078 * 3079 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 3080 * out of the public fields to keep the undefined bits out of the developer's way. 3081 * 3082 * Flag to specify that the status bar is displayed in translucent mode. 3083 */ 3084 public static final int STATUS_BAR_TRANSLUCENT = 0x40000000; 3085 3086 /** 3087 * @hide 3088 * 3089 * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked 3090 * out of the public fields to keep the undefined bits out of the developer's way. 3091 * 3092 * Flag to specify that the navigation bar is displayed in translucent mode. 3093 */ 3094 public static final int NAVIGATION_BAR_TRANSLUCENT = 0x80000000; 3095 3096 /** 3097 * @hide 3098 * 3099 * Makes navigation bar transparent (but not the status bar). 3100 */ 3101 public static final int NAVIGATION_BAR_TRANSPARENT = 0x00008000; 3102 3103 /** 3104 * @hide 3105 * 3106 * Makes status bar transparent (but not the navigation bar). 3107 */ 3108 public static final int STATUS_BAR_TRANSPARENT = 0x0000008; 3109 3110 /** 3111 * @hide 3112 * 3113 * Makes both status bar and navigation bar transparent. 3114 */ 3115 public static final int SYSTEM_UI_TRANSPARENT = NAVIGATION_BAR_TRANSPARENT 3116 | STATUS_BAR_TRANSPARENT; 3117 3118 /** 3119 * @hide 3120 */ 3121 public static final int PUBLIC_STATUS_BAR_VISIBILITY_MASK = 0x00003FF7; 3122 3123 /** 3124 * These are the system UI flags that can be cleared by events outside 3125 * of an application. Currently this is just the ability to tap on the 3126 * screen while hiding the navigation bar to have it return. 3127 * @hide 3128 */ 3129 public static final int SYSTEM_UI_CLEARABLE_FLAGS = 3130 SYSTEM_UI_FLAG_LOW_PROFILE | SYSTEM_UI_FLAG_HIDE_NAVIGATION 3131 | SYSTEM_UI_FLAG_FULLSCREEN; 3132 3133 /** 3134 * Flags that can impact the layout in relation to system UI. 3135 */ 3136 public static final int SYSTEM_UI_LAYOUT_FLAGS = 3137 SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION 3138 | SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN; 3139 3140 /** @hide */ 3141 @IntDef(flag = true, 3142 value = { FIND_VIEWS_WITH_TEXT, FIND_VIEWS_WITH_CONTENT_DESCRIPTION }) 3143 @Retention(RetentionPolicy.SOURCE) 3144 public @interface FindViewFlags {} 3145 3146 /** 3147 * Find views that render the specified text. 3148 * 3149 * @see #findViewsWithText(ArrayList, CharSequence, int) 3150 */ 3151 public static final int FIND_VIEWS_WITH_TEXT = 0x00000001; 3152 3153 /** 3154 * Find find views that contain the specified content description. 3155 * 3156 * @see #findViewsWithText(ArrayList, CharSequence, int) 3157 */ 3158 public static final int FIND_VIEWS_WITH_CONTENT_DESCRIPTION = 0x00000002; 3159 3160 /** 3161 * Find views that contain {@link AccessibilityNodeProvider}. Such 3162 * a View is a root of virtual view hierarchy and may contain the searched 3163 * text. If this flag is set Views with providers are automatically 3164 * added and it is a responsibility of the client to call the APIs of 3165 * the provider to determine whether the virtual tree rooted at this View 3166 * contains the text, i.e. getting the list of {@link AccessibilityNodeInfo}s 3167 * representing the virtual views with this text. 3168 * 3169 * @see #findViewsWithText(ArrayList, CharSequence, int) 3170 * 3171 * @hide 3172 */ 3173 public static final int FIND_VIEWS_WITH_ACCESSIBILITY_NODE_PROVIDERS = 0x00000004; 3174 3175 /** 3176 * The undefined cursor position. 3177 * 3178 * @hide 3179 */ 3180 public static final int ACCESSIBILITY_CURSOR_POSITION_UNDEFINED = -1; 3181 3182 /** 3183 * Indicates that the screen has changed state and is now off. 3184 * 3185 * @see #onScreenStateChanged(int) 3186 */ 3187 public static final int SCREEN_STATE_OFF = 0x0; 3188 3189 /** 3190 * Indicates that the screen has changed state and is now on. 3191 * 3192 * @see #onScreenStateChanged(int) 3193 */ 3194 public static final int SCREEN_STATE_ON = 0x1; 3195 3196 /** 3197 * Indicates no axis of view scrolling. 3198 */ 3199 public static final int SCROLL_AXIS_NONE = 0; 3200 3201 /** 3202 * Indicates scrolling along the horizontal axis. 3203 */ 3204 public static final int SCROLL_AXIS_HORIZONTAL = 1 << 0; 3205 3206 /** 3207 * Indicates scrolling along the vertical axis. 3208 */ 3209 public static final int SCROLL_AXIS_VERTICAL = 1 << 1; 3210 3211 /** 3212 * Controls the over-scroll mode for this view. 3213 * See {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)}, 3214 * {@link #OVER_SCROLL_ALWAYS}, {@link #OVER_SCROLL_IF_CONTENT_SCROLLS}, 3215 * and {@link #OVER_SCROLL_NEVER}. 3216 */ 3217 private int mOverScrollMode; 3218 3219 /** 3220 * The parent this view is attached to. 3221 * {@hide} 3222 * 3223 * @see #getParent() 3224 */ 3225 protected ViewParent mParent; 3226 3227 /** 3228 * {@hide} 3229 */ 3230 AttachInfo mAttachInfo; 3231 3232 /** 3233 * {@hide} 3234 */ 3235 @ViewDebug.ExportedProperty(flagMapping = { 3236 @ViewDebug.FlagToString(mask = PFLAG_FORCE_LAYOUT, equals = PFLAG_FORCE_LAYOUT, 3237 name = "FORCE_LAYOUT"), 3238 @ViewDebug.FlagToString(mask = PFLAG_LAYOUT_REQUIRED, equals = PFLAG_LAYOUT_REQUIRED, 3239 name = "LAYOUT_REQUIRED"), 3240 @ViewDebug.FlagToString(mask = PFLAG_DRAWING_CACHE_VALID, equals = PFLAG_DRAWING_CACHE_VALID, 3241 name = "DRAWING_CACHE_INVALID", outputIf = false), 3242 @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "DRAWN", outputIf = true), 3243 @ViewDebug.FlagToString(mask = PFLAG_DRAWN, equals = PFLAG_DRAWN, name = "NOT_DRAWN", outputIf = false), 3244 @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY_OPAQUE, name = "DIRTY_OPAQUE"), 3245 @ViewDebug.FlagToString(mask = PFLAG_DIRTY_MASK, equals = PFLAG_DIRTY, name = "DIRTY") 3246 }, formatToHexString = true) 3247 int mPrivateFlags; 3248 int mPrivateFlags2; 3249 int mPrivateFlags3; 3250 3251 /** 3252 * This view's request for the visibility of the status bar. 3253 * @hide 3254 */ 3255 @ViewDebug.ExportedProperty(flagMapping = { 3256 @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_LOW_PROFILE, 3257 equals = SYSTEM_UI_FLAG_LOW_PROFILE, 3258 name = "SYSTEM_UI_FLAG_LOW_PROFILE", outputIf = true), 3259 @ViewDebug.FlagToString(mask = SYSTEM_UI_FLAG_HIDE_NAVIGATION, 3260 equals = SYSTEM_UI_FLAG_HIDE_NAVIGATION, 3261 name = "SYSTEM_UI_FLAG_HIDE_NAVIGATION", outputIf = true), 3262 @ViewDebug.FlagToString(mask = PUBLIC_STATUS_BAR_VISIBILITY_MASK, 3263 equals = SYSTEM_UI_FLAG_VISIBLE, 3264 name = "SYSTEM_UI_FLAG_VISIBLE", outputIf = true) 3265 }, formatToHexString = true) 3266 int mSystemUiVisibility; 3267 3268 /** 3269 * Reference count for transient state. 3270 * @see #setHasTransientState(boolean) 3271 */ 3272 int mTransientStateCount = 0; 3273 3274 /** 3275 * Count of how many windows this view has been attached to. 3276 */ 3277 int mWindowAttachCount; 3278 3279 /** 3280 * The layout parameters associated with this view and used by the parent 3281 * {@link android.view.ViewGroup} to determine how this view should be 3282 * laid out. 3283 * {@hide} 3284 */ 3285 protected ViewGroup.LayoutParams mLayoutParams; 3286 3287 /** 3288 * The view flags hold various views states. 3289 * {@hide} 3290 */ 3291 @ViewDebug.ExportedProperty(formatToHexString = true) 3292 int mViewFlags; 3293 3294 static class TransformationInfo { 3295 /** 3296 * The transform matrix for the View. This transform is calculated internally 3297 * based on the translation, rotation, and scale properties. 3298 * 3299 * Do *not* use this variable directly; instead call getMatrix(), which will 3300 * load the value from the View's RenderNode. 3301 */ 3302 private final Matrix mMatrix = new Matrix(); 3303 3304 /** 3305 * The inverse transform matrix for the View. This transform is calculated 3306 * internally based on the translation, rotation, and scale properties. 3307 * 3308 * Do *not* use this variable directly; instead call getInverseMatrix(), 3309 * which will load the value from the View's RenderNode. 3310 */ 3311 private Matrix mInverseMatrix; 3312 3313 /** 3314 * The opacity of the View. This is a value from 0 to 1, where 0 means 3315 * completely transparent and 1 means completely opaque. 3316 */ 3317 @ViewDebug.ExportedProperty 3318 float mAlpha = 1f; 3319 3320 /** 3321 * The opacity of the view as manipulated by the Fade transition. This is a hidden 3322 * property only used by transitions, which is composited with the other alpha 3323 * values to calculate the final visual alpha value. 3324 */ 3325 float mTransitionAlpha = 1f; 3326 } 3327 3328 TransformationInfo mTransformationInfo; 3329 3330 /** 3331 * Current clip bounds. to which all drawing of this view are constrained. 3332 */ 3333 Rect mClipBounds = null; 3334 3335 private boolean mLastIsOpaque; 3336 3337 /** 3338 * The distance in pixels from the left edge of this view's parent 3339 * to the left edge of this view. 3340 * {@hide} 3341 */ 3342 @ViewDebug.ExportedProperty(category = "layout") 3343 protected int mLeft; 3344 /** 3345 * The distance in pixels from the left edge of this view's parent 3346 * to the right edge of this view. 3347 * {@hide} 3348 */ 3349 @ViewDebug.ExportedProperty(category = "layout") 3350 protected int mRight; 3351 /** 3352 * The distance in pixels from the top edge of this view's parent 3353 * to the top edge of this view. 3354 * {@hide} 3355 */ 3356 @ViewDebug.ExportedProperty(category = "layout") 3357 protected int mTop; 3358 /** 3359 * The distance in pixels from the top edge of this view's parent 3360 * to the bottom edge of this view. 3361 * {@hide} 3362 */ 3363 @ViewDebug.ExportedProperty(category = "layout") 3364 protected int mBottom; 3365 3366 /** 3367 * The offset, in pixels, by which the content of this view is scrolled 3368 * horizontally. 3369 * {@hide} 3370 */ 3371 @ViewDebug.ExportedProperty(category = "scrolling") 3372 protected int mScrollX; 3373 /** 3374 * The offset, in pixels, by which the content of this view is scrolled 3375 * vertically. 3376 * {@hide} 3377 */ 3378 @ViewDebug.ExportedProperty(category = "scrolling") 3379 protected int mScrollY; 3380 3381 /** 3382 * The left padding in pixels, that is the distance in pixels between the 3383 * left edge of this view and the left edge of its content. 3384 * {@hide} 3385 */ 3386 @ViewDebug.ExportedProperty(category = "padding") 3387 protected int mPaddingLeft = 0; 3388 /** 3389 * The right padding in pixels, that is the distance in pixels between the 3390 * right edge of this view and the right edge of its content. 3391 * {@hide} 3392 */ 3393 @ViewDebug.ExportedProperty(category = "padding") 3394 protected int mPaddingRight = 0; 3395 /** 3396 * The top padding in pixels, that is the distance in pixels between the 3397 * top edge of this view and the top edge of its content. 3398 * {@hide} 3399 */ 3400 @ViewDebug.ExportedProperty(category = "padding") 3401 protected int mPaddingTop; 3402 /** 3403 * The bottom padding in pixels, that is the distance in pixels between the 3404 * bottom edge of this view and the bottom edge of its content. 3405 * {@hide} 3406 */ 3407 @ViewDebug.ExportedProperty(category = "padding") 3408 protected int mPaddingBottom; 3409 3410 /** 3411 * The layout insets in pixels, that is the distance in pixels between the 3412 * visible edges of this view its bounds. 3413 */ 3414 private Insets mLayoutInsets; 3415 3416 /** 3417 * Briefly describes the view and is primarily used for accessibility support. 3418 */ 3419 private CharSequence mContentDescription; 3420 3421 /** 3422 * Specifies the id of a view for which this view serves as a label for 3423 * accessibility purposes. 3424 */ 3425 private int mLabelForId = View.NO_ID; 3426 3427 /** 3428 * Predicate for matching labeled view id with its label for 3429 * accessibility purposes. 3430 */ 3431 private MatchLabelForPredicate mMatchLabelForPredicate; 3432 3433 /** 3434 * Specifies a view before which this one is visited in accessibility traversal. 3435 */ 3436 private int mAccessibilityTraversalBeforeId = NO_ID; 3437 3438 /** 3439 * Specifies a view after which this one is visited in accessibility traversal. 3440 */ 3441 private int mAccessibilityTraversalAfterId = NO_ID; 3442 3443 /** 3444 * Predicate for matching a view by its id. 3445 */ 3446 private MatchIdPredicate mMatchIdPredicate; 3447 3448 /** 3449 * Cache the paddingRight set by the user to append to the scrollbar's size. 3450 * 3451 * @hide 3452 */ 3453 @ViewDebug.ExportedProperty(category = "padding") 3454 protected int mUserPaddingRight; 3455 3456 /** 3457 * Cache the paddingBottom set by the user to append to the scrollbar's size. 3458 * 3459 * @hide 3460 */ 3461 @ViewDebug.ExportedProperty(category = "padding") 3462 protected int mUserPaddingBottom; 3463 3464 /** 3465 * Cache the paddingLeft set by the user to append to the scrollbar's size. 3466 * 3467 * @hide 3468 */ 3469 @ViewDebug.ExportedProperty(category = "padding") 3470 protected int mUserPaddingLeft; 3471 3472 /** 3473 * Cache the paddingStart set by the user to append to the scrollbar's size. 3474 * 3475 */ 3476 @ViewDebug.ExportedProperty(category = "padding") 3477 int mUserPaddingStart; 3478 3479 /** 3480 * Cache the paddingEnd set by the user to append to the scrollbar's size. 3481 * 3482 */ 3483 @ViewDebug.ExportedProperty(category = "padding") 3484 int mUserPaddingEnd; 3485 3486 /** 3487 * Cache initial left padding. 3488 * 3489 * @hide 3490 */ 3491 int mUserPaddingLeftInitial; 3492 3493 /** 3494 * Cache initial right padding. 3495 * 3496 * @hide 3497 */ 3498 int mUserPaddingRightInitial; 3499 3500 /** 3501 * Default undefined padding 3502 */ 3503 private static final int UNDEFINED_PADDING = Integer.MIN_VALUE; 3504 3505 /** 3506 * Cache if a left padding has been defined 3507 */ 3508 private boolean mLeftPaddingDefined = false; 3509 3510 /** 3511 * Cache if a right padding has been defined 3512 */ 3513 private boolean mRightPaddingDefined = false; 3514 3515 /** 3516 * @hide 3517 */ 3518 int mOldWidthMeasureSpec = Integer.MIN_VALUE; 3519 /** 3520 * @hide 3521 */ 3522 int mOldHeightMeasureSpec = Integer.MIN_VALUE; 3523 3524 private LongSparseLongArray mMeasureCache; 3525 3526 @ViewDebug.ExportedProperty(deepExport = true, prefix = "bg_") 3527 private Drawable mBackground; 3528 private TintInfo mBackgroundTint; 3529 3530 @ViewDebug.ExportedProperty(deepExport = true, prefix = "fg_") 3531 private ForegroundInfo mForegroundInfo; 3532 3533 private Drawable mScrollIndicatorDrawable; 3534 3535 /** 3536 * RenderNode used for backgrounds. 3537 * <p> 3538 * When non-null and valid, this is expected to contain an up-to-date copy 3539 * of the background drawable. It is cleared on temporary detach, and reset 3540 * on cleanup. 3541 */ 3542 private RenderNode mBackgroundRenderNode; 3543 3544 private int mBackgroundResource; 3545 private boolean mBackgroundSizeChanged; 3546 3547 private String mTransitionName; 3548 3549 static class TintInfo { 3550 ColorStateList mTintList; 3551 PorterDuff.Mode mTintMode; 3552 boolean mHasTintMode; 3553 boolean mHasTintList; 3554 } 3555 3556 private static class ForegroundInfo { 3557 private Drawable mDrawable; 3558 private TintInfo mTintInfo; 3559 private int mGravity = Gravity.FILL; 3560 private boolean mInsidePadding = true; 3561 private boolean mBoundsChanged = true; 3562 private final Rect mSelfBounds = new Rect(); 3563 private final Rect mOverlayBounds = new Rect(); 3564 } 3565 3566 static class ListenerInfo { 3567 /** 3568 * Listener used to dispatch focus change events. 3569 * This field should be made private, so it is hidden from the SDK. 3570 * {@hide} 3571 */ 3572 protected OnFocusChangeListener mOnFocusChangeListener; 3573 3574 /** 3575 * Listeners for layout change events. 3576 */ 3577 private ArrayList<OnLayoutChangeListener> mOnLayoutChangeListeners; 3578 3579 protected OnScrollChangeListener mOnScrollChangeListener; 3580 3581 /** 3582 * Listeners for attach events. 3583 */ 3584 private CopyOnWriteArrayList<OnAttachStateChangeListener> mOnAttachStateChangeListeners; 3585 3586 /** 3587 * Listener used to dispatch click events. 3588 * This field should be made private, so it is hidden from the SDK. 3589 * {@hide} 3590 */ 3591 public OnClickListener mOnClickListener; 3592 3593 /** 3594 * Listener used to dispatch long click events. 3595 * This field should be made private, so it is hidden from the SDK. 3596 * {@hide} 3597 */ 3598 protected OnLongClickListener mOnLongClickListener; 3599 3600 /** 3601 * Listener used to dispatch context click events. This field should be made private, so it 3602 * is hidden from the SDK. 3603 * {@hide} 3604 */ 3605 protected OnContextClickListener mOnContextClickListener; 3606 3607 /** 3608 * Listener used to build the context menu. 3609 * This field should be made private, so it is hidden from the SDK. 3610 * {@hide} 3611 */ 3612 protected OnCreateContextMenuListener mOnCreateContextMenuListener; 3613 3614 private OnKeyListener mOnKeyListener; 3615 3616 private OnTouchListener mOnTouchListener; 3617 3618 private OnHoverListener mOnHoverListener; 3619 3620 private OnGenericMotionListener mOnGenericMotionListener; 3621 3622 private OnDragListener mOnDragListener; 3623 3624 private OnSystemUiVisibilityChangeListener mOnSystemUiVisibilityChangeListener; 3625 3626 OnApplyWindowInsetsListener mOnApplyWindowInsetsListener; 3627 } 3628 3629 ListenerInfo mListenerInfo; 3630 3631 // Temporary values used to hold (x,y) coordinates when delegating from the 3632 // two-arg performLongClick() method to the legacy no-arg version. 3633 private float mLongClickX = Float.NaN; 3634 private float mLongClickY = Float.NaN; 3635 3636 /** 3637 * The application environment this view lives in. 3638 * This field should be made private, so it is hidden from the SDK. 3639 * {@hide} 3640 */ 3641 @ViewDebug.ExportedProperty(deepExport = true) 3642 protected Context mContext; 3643 3644 private final Resources mResources; 3645 3646 private ScrollabilityCache mScrollCache; 3647 3648 private int[] mDrawableState = null; 3649 3650 ViewOutlineProvider mOutlineProvider = ViewOutlineProvider.BACKGROUND; 3651 3652 /** 3653 * Animator that automatically runs based on state changes. 3654 */ 3655 private StateListAnimator mStateListAnimator; 3656 3657 /** 3658 * When this view has focus and the next focus is {@link #FOCUS_LEFT}, 3659 * the user may specify which view to go to next. 3660 */ 3661 private int mNextFocusLeftId = View.NO_ID; 3662 3663 /** 3664 * When this view has focus and the next focus is {@link #FOCUS_RIGHT}, 3665 * the user may specify which view to go to next. 3666 */ 3667 private int mNextFocusRightId = View.NO_ID; 3668 3669 /** 3670 * When this view has focus and the next focus is {@link #FOCUS_UP}, 3671 * the user may specify which view to go to next. 3672 */ 3673 private int mNextFocusUpId = View.NO_ID; 3674 3675 /** 3676 * When this view has focus and the next focus is {@link #FOCUS_DOWN}, 3677 * the user may specify which view to go to next. 3678 */ 3679 private int mNextFocusDownId = View.NO_ID; 3680 3681 /** 3682 * When this view has focus and the next focus is {@link #FOCUS_FORWARD}, 3683 * the user may specify which view to go to next. 3684 */ 3685 int mNextFocusForwardId = View.NO_ID; 3686 3687 private CheckForLongPress mPendingCheckForLongPress; 3688 private CheckForTap mPendingCheckForTap = null; 3689 private PerformClick mPerformClick; 3690 private SendViewScrolledAccessibilityEvent mSendViewScrolledAccessibilityEvent; 3691 3692 private UnsetPressedState mUnsetPressedState; 3693 3694 /** 3695 * Whether the long press's action has been invoked. The tap's action is invoked on the 3696 * up event while a long press is invoked as soon as the long press duration is reached, so 3697 * a long press could be performed before the tap is checked, in which case the tap's action 3698 * should not be invoked. 3699 */ 3700 private boolean mHasPerformedLongPress; 3701 3702 /** 3703 * Whether a context click button is currently pressed down. This is true when the stylus is 3704 * touching the screen and the primary button has been pressed, or if a mouse's right button is 3705 * pressed. This is false once the button is released or if the stylus has been lifted. 3706 */ 3707 private boolean mInContextButtonPress; 3708 3709 /** 3710 * Whether the next up event should be ignored for the purposes of gesture recognition. This is 3711 * true after a stylus button press has occured, when the next up event should not be recognized 3712 * as a tap. 3713 */ 3714 private boolean mIgnoreNextUpEvent; 3715 3716 /** 3717 * The minimum height of the view. We'll try our best to have the height 3718 * of this view to at least this amount. 3719 */ 3720 @ViewDebug.ExportedProperty(category = "measurement") 3721 private int mMinHeight; 3722 3723 /** 3724 * The minimum width of the view. We'll try our best to have the width 3725 * of this view to at least this amount. 3726 */ 3727 @ViewDebug.ExportedProperty(category = "measurement") 3728 private int mMinWidth; 3729 3730 /** 3731 * The delegate to handle touch events that are physically in this view 3732 * but should be handled by another view. 3733 */ 3734 private TouchDelegate mTouchDelegate = null; 3735 3736 /** 3737 * Solid color to use as a background when creating the drawing cache. Enables 3738 * the cache to use 16 bit bitmaps instead of 32 bit. 3739 */ 3740 private int mDrawingCacheBackgroundColor = 0; 3741 3742 /** 3743 * Special tree observer used when mAttachInfo is null. 3744 */ 3745 private ViewTreeObserver mFloatingTreeObserver; 3746 3747 /** 3748 * Cache the touch slop from the context that created the view. 3749 */ 3750 private int mTouchSlop; 3751 3752 /** 3753 * Object that handles automatic animation of view properties. 3754 */ 3755 private ViewPropertyAnimator mAnimator = null; 3756 3757 /** 3758 * List of registered FrameMetricsObservers. 3759 */ 3760 private ArrayList<FrameMetricsObserver> mFrameMetricsObservers; 3761 3762 /** 3763 * Flag indicating that a drag can cross window boundaries. When 3764 * {@link #startDragAndDrop(ClipData, DragShadowBuilder, Object, int)} is called 3765 * with this flag set, all visible applications with targetSdkVersion >= 3766 * {@link android.os.Build.VERSION_CODES#N API 24} will be able to participate 3767 * in the drag operation and receive the dragged content. 3768 * 3769 * <p>If this is the only flag set, then the drag recipient will only have access to text data 3770 * and intents contained in the {@link ClipData} object. Access to URIs contained in the 3771 * {@link ClipData} is determined by other DRAG_FLAG_GLOBAL_* flags</p> 3772 */ 3773 public static final int DRAG_FLAG_GLOBAL = 1 << 8; // 256 3774 3775 /** 3776 * When this flag is used with {@link #DRAG_FLAG_GLOBAL}, the drag recipient will be able to 3777 * request read access to the content URI(s) contained in the {@link ClipData} object. 3778 * @see android.content.Intent.FLAG_GRANT_READ_URI_PERMISSION 3779 */ 3780 public static final int DRAG_FLAG_GLOBAL_URI_READ = Intent.FLAG_GRANT_READ_URI_PERMISSION; 3781 3782 /** 3783 * When this flag is used with {@link #DRAG_FLAG_GLOBAL}, the drag recipient will be able to 3784 * request write access to the content URI(s) contained in the {@link ClipData} object. 3785 * @see android.content.Intent.FLAG_GRANT_WRITE_URI_PERMISSION 3786 */ 3787 public static final int DRAG_FLAG_GLOBAL_URI_WRITE = Intent.FLAG_GRANT_WRITE_URI_PERMISSION; 3788 3789 /** 3790 * When this flag is used with {@link #DRAG_FLAG_GLOBAL_URI_READ} and/or {@link 3791 * #DRAG_FLAG_GLOBAL_URI_WRITE}, the URI permission grant can be persisted across device 3792 * reboots until explicitly revoked with 3793 * {@link android.content.Context#revokeUriPermission(Uri,int) Context.revokeUriPermission}. 3794 * @see android.content.Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION 3795 */ 3796 public static final int DRAG_FLAG_GLOBAL_PERSISTABLE_URI_PERMISSION = 3797 Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION; 3798 3799 /** 3800 * When this flag is used with {@link #DRAG_FLAG_GLOBAL_URI_READ} and/or {@link 3801 * #DRAG_FLAG_GLOBAL_URI_WRITE}, the URI permission grant applies to any URI that is a prefix 3802 * match against the original granted URI. 3803 * @see android.content.Intent.FLAG_GRANT_PREFIX_URI_PERMISSION 3804 */ 3805 public static final int DRAG_FLAG_GLOBAL_PREFIX_URI_PERMISSION = 3806 Intent.FLAG_GRANT_PREFIX_URI_PERMISSION; 3807 3808 /** 3809 * Flag indicating that the drag shadow will be opaque. When 3810 * {@link #startDragAndDrop(ClipData, DragShadowBuilder, Object, int)} is called 3811 * with this flag set, the drag shadow will be opaque, otherwise, it will be semitransparent. 3812 */ 3813 public static final int DRAG_FLAG_OPAQUE = 1 << 9; 3814 3815 /** 3816 * Vertical scroll factor cached by {@link #getVerticalScrollFactor}. 3817 */ 3818 private float mVerticalScrollFactor; 3819 3820 /** 3821 * Position of the vertical scroll bar. 3822 */ 3823 private int mVerticalScrollbarPosition; 3824 3825 /** 3826 * Position the scroll bar at the default position as determined by the system. 3827 */ 3828 public static final int SCROLLBAR_POSITION_DEFAULT = 0; 3829 3830 /** 3831 * Position the scroll bar along the left edge. 3832 */ 3833 public static final int SCROLLBAR_POSITION_LEFT = 1; 3834 3835 /** 3836 * Position the scroll bar along the right edge. 3837 */ 3838 public static final int SCROLLBAR_POSITION_RIGHT = 2; 3839 3840 /** 3841 * Indicates that the view does not have a layer. 3842 * 3843 * @see #getLayerType() 3844 * @see #setLayerType(int, android.graphics.Paint) 3845 * @see #LAYER_TYPE_SOFTWARE 3846 * @see #LAYER_TYPE_HARDWARE 3847 */ 3848 public static final int LAYER_TYPE_NONE = 0; 3849 3850 /** 3851 * <p>Indicates that the view has a software layer. A software layer is backed 3852 * by a bitmap and causes the view to be rendered using Android's software 3853 * rendering pipeline, even if hardware acceleration is enabled.</p> 3854 * 3855 * <p>Software layers have various usages:</p> 3856 * <p>When the application is not using hardware acceleration, a software layer 3857 * is useful to apply a specific color filter and/or blending mode and/or 3858 * translucency to a view and all its children.</p> 3859 * <p>When the application is using hardware acceleration, a software layer 3860 * is useful to render drawing primitives not supported by the hardware 3861 * accelerated pipeline. It can also be used to cache a complex view tree 3862 * into a texture and reduce the complexity of drawing operations. For instance, 3863 * when animating a complex view tree with a translation, a software layer can 3864 * be used to render the view tree only once.</p> 3865 * <p>Software layers should be avoided when the affected view tree updates 3866 * often. Every update will require to re-render the software layer, which can 3867 * potentially be slow (particularly when hardware acceleration is turned on 3868 * since the layer will have to be uploaded into a hardware texture after every 3869 * update.)</p> 3870 * 3871 * @see #getLayerType() 3872 * @see #setLayerType(int, android.graphics.Paint) 3873 * @see #LAYER_TYPE_NONE 3874 * @see #LAYER_TYPE_HARDWARE 3875 */ 3876 public static final int LAYER_TYPE_SOFTWARE = 1; 3877 3878 /** 3879 * <p>Indicates that the view has a hardware layer. A hardware layer is backed 3880 * by a hardware specific texture (generally Frame Buffer Objects or FBO on 3881 * OpenGL hardware) and causes the view to be rendered using Android's hardware 3882 * rendering pipeline, but only if hardware acceleration is turned on for the 3883 * view hierarchy. When hardware acceleration is turned off, hardware layers 3884 * behave exactly as {@link #LAYER_TYPE_SOFTWARE software layers}.</p> 3885 * 3886 * <p>A hardware layer is useful to apply a specific color filter and/or 3887 * blending mode and/or translucency to a view and all its children.</p> 3888 * <p>A hardware layer can be used to cache a complex view tree into a 3889 * texture and reduce the complexity of drawing operations. For instance, 3890 * when animating a complex view tree with a translation, a hardware layer can 3891 * be used to render the view tree only once.</p> 3892 * <p>A hardware layer can also be used to increase the rendering quality when 3893 * rotation transformations are applied on a view. It can also be used to 3894 * prevent potential clipping issues when applying 3D transforms on a view.</p> 3895 * 3896 * @see #getLayerType() 3897 * @see #setLayerType(int, android.graphics.Paint) 3898 * @see #LAYER_TYPE_NONE 3899 * @see #LAYER_TYPE_SOFTWARE 3900 */ 3901 public static final int LAYER_TYPE_HARDWARE = 2; 3902 3903 @ViewDebug.ExportedProperty(category = "drawing", mapping = { 3904 @ViewDebug.IntToString(from = LAYER_TYPE_NONE, to = "NONE"), 3905 @ViewDebug.IntToString(from = LAYER_TYPE_SOFTWARE, to = "SOFTWARE"), 3906 @ViewDebug.IntToString(from = LAYER_TYPE_HARDWARE, to = "HARDWARE") 3907 }) 3908 int mLayerType = LAYER_TYPE_NONE; 3909 Paint mLayerPaint; 3910 3911 /** 3912 * Set to true when drawing cache is enabled and cannot be created. 3913 * 3914 * @hide 3915 */ 3916 public boolean mCachingFailed; 3917 private Bitmap mDrawingCache; 3918 private Bitmap mUnscaledDrawingCache; 3919 3920 /** 3921 * RenderNode holding View properties, potentially holding a DisplayList of View content. 3922 * <p> 3923 * When non-null and valid, this is expected to contain an up-to-date copy 3924 * of the View content. Its DisplayList content is cleared on temporary detach and reset on 3925 * cleanup. 3926 */ 3927 final RenderNode mRenderNode; 3928 3929 /** 3930 * Set to true when the view is sending hover accessibility events because it 3931 * is the innermost hovered view. 3932 */ 3933 private boolean mSendingHoverAccessibilityEvents; 3934 3935 /** 3936 * Delegate for injecting accessibility functionality. 3937 */ 3938 AccessibilityDelegate mAccessibilityDelegate; 3939 3940 /** 3941 * The view's overlay layer. Developers get a reference to the overlay via getOverlay() 3942 * and add/remove objects to/from the overlay directly through the Overlay methods. 3943 */ 3944 ViewOverlay mOverlay; 3945 3946 /** 3947 * The currently active parent view for receiving delegated nested scrolling events. 3948 * This is set by {@link #startNestedScroll(int)} during a touch interaction and cleared 3949 * by {@link #stopNestedScroll()} at the same point where we clear 3950 * requestDisallowInterceptTouchEvent. 3951 */ 3952 private ViewParent mNestedScrollingParent; 3953 3954 /** 3955 * Consistency verifier for debugging purposes. 3956 * @hide 3957 */ 3958 protected final InputEventConsistencyVerifier mInputEventConsistencyVerifier = 3959 InputEventConsistencyVerifier.isInstrumentationEnabled() ? 3960 new InputEventConsistencyVerifier(this, 0) : null; 3961 3962 private static final AtomicInteger sNextGeneratedId = new AtomicInteger(1); 3963 3964 private int[] mTempNestedScrollConsumed; 3965 3966 /** 3967 * An overlay is going to draw this View instead of being drawn as part of this 3968 * View's parent. mGhostView is the View in the Overlay that must be invalidated 3969 * when this view is invalidated. 3970 */ 3971 GhostView mGhostView; 3972 3973 /** 3974 * Holds pairs of adjacent attribute data: attribute name followed by its value. 3975 * @hide 3976 */ 3977 @ViewDebug.ExportedProperty(category = "attributes", hasAdjacentMapping = true) 3978 public String[] mAttributes; 3979 3980 /** 3981 * Maps a Resource id to its name. 3982 */ 3983 private static SparseArray<String> mAttributeMap; 3984 3985 /** 3986 * Queue of pending runnables. Used to postpone calls to post() until this 3987 * view is attached and has a handler. 3988 */ 3989 private HandlerActionQueue mRunQueue; 3990 3991 /** 3992 * The pointer icon when the mouse hovers on this view. The default is null. 3993 */ 3994 private PointerIcon mPointerIcon; 3995 3996 /** 3997 * @hide 3998 */ 3999 String mStartActivityRequestWho; 4000 4001 @Nullable 4002 private RoundScrollbarRenderer mRoundScrollbarRenderer; 4003 4004 /** 4005 * Simple constructor to use when creating a view from code. 4006 * 4007 * @param context The Context the view is running in, through which it can 4008 * access the current theme, resources, etc. 4009 */ 4010 public View(Context context) { 4011 mContext = context; 4012 mResources = context != null ? context.getResources() : null; 4013 mViewFlags = SOUND_EFFECTS_ENABLED | HAPTIC_FEEDBACK_ENABLED; 4014 // Set some flags defaults 4015 mPrivateFlags2 = 4016 (LAYOUT_DIRECTION_DEFAULT << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT) | 4017 (TEXT_DIRECTION_DEFAULT << PFLAG2_TEXT_DIRECTION_MASK_SHIFT) | 4018 (PFLAG2_TEXT_DIRECTION_RESOLVED_DEFAULT) | 4019 (TEXT_ALIGNMENT_DEFAULT << PFLAG2_TEXT_ALIGNMENT_MASK_SHIFT) | 4020 (PFLAG2_TEXT_ALIGNMENT_RESOLVED_DEFAULT) | 4021 (IMPORTANT_FOR_ACCESSIBILITY_DEFAULT << PFLAG2_IMPORTANT_FOR_ACCESSIBILITY_SHIFT); 4022 mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); 4023 setOverScrollMode(OVER_SCROLL_IF_CONTENT_SCROLLS); 4024 mUserPaddingStart = UNDEFINED_PADDING; 4025 mUserPaddingEnd = UNDEFINED_PADDING; 4026 mRenderNode = RenderNode.create(getClass().getName(), this); 4027 4028 if (!sCompatibilityDone && context != null) { 4029 final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; 4030 4031 // Older apps may need this compatibility hack for measurement. 4032 sUseBrokenMakeMeasureSpec = targetSdkVersion <= JELLY_BEAN_MR1; 4033 4034 // Older apps expect onMeasure() to always be called on a layout pass, regardless 4035 // of whether a layout was requested on that View. 4036 sIgnoreMeasureCache = targetSdkVersion < KITKAT; 4037 4038 Canvas.sCompatibilityRestore = targetSdkVersion < M; 4039 4040 // In M and newer, our widgets can pass a "hint" value in the size 4041 // for UNSPECIFIED MeasureSpecs. This lets child views of scrolling containers 4042 // know what the expected parent size is going to be, so e.g. list items can size 4043 // themselves at 1/3 the size of their container. It breaks older apps though, 4044 // specifically apps that use some popular open source libraries. 4045 sUseZeroUnspecifiedMeasureSpec = targetSdkVersion < M; 4046 4047 // Old versions of the platform would give different results from 4048 // LinearLayout measurement passes using EXACTLY and non-EXACTLY 4049 // modes, so we always need to run an additional EXACTLY pass. 4050 sAlwaysRemeasureExactly = targetSdkVersion <= M; 4051 4052 // Prior to N, layout params could change without requiring a 4053 // subsequent call to setLayoutParams() and they would usually 4054 // work. Partial layout breaks this assumption. 4055 sLayoutParamsAlwaysChanged = targetSdkVersion <= M; 4056 4057 // Prior to N, TextureView would silently ignore calls to setBackground/setForeground. 4058 // On N+, we throw, but that breaks compatibility with apps that use these methods. 4059 sTextureViewIgnoresDrawableSetters = targetSdkVersion <= M; 4060 4061 // Prior to N, we would drop margins in LayoutParam conversions. The fix triggers bugs 4062 // in apps so we target check it to avoid breaking existing apps. 4063 sPreserveMarginParamsInLayoutParamConversion = targetSdkVersion >= N; 4064 4065 sCascadedDragDrop = targetSdkVersion < N; 4066 4067 sCompatibilityDone = true; 4068 } 4069 } 4070 4071 /** 4072 * Constructor that is called when inflating a view from XML. This is called 4073 * when a view is being constructed from an XML file, supplying attributes 4074 * that were specified in the XML file. This version uses a default style of 4075 * 0, so the only attribute values applied are those in the Context's Theme 4076 * and the given AttributeSet. 4077 * 4078 * <p> 4079 * The method onFinishInflate() will be called after all children have been 4080 * added. 4081 * 4082 * @param context The Context the view is running in, through which it can 4083 * access the current theme, resources, etc. 4084 * @param attrs The attributes of the XML tag that is inflating the view. 4085 * @see #View(Context, AttributeSet, int) 4086 */ 4087 public View(Context context, @Nullable AttributeSet attrs) { 4088 this(context, attrs, 0); 4089 } 4090 4091 /** 4092 * Perform inflation from XML and apply a class-specific base style from a 4093 * theme attribute. This constructor of View allows subclasses to use their 4094 * own base style when they are inflating. For example, a Button class's 4095 * constructor would call this version of the super class constructor and 4096 * supply <code>R.attr.buttonStyle</code> for <var>defStyleAttr</var>; this 4097 * allows the theme's button style to modify all of the base view attributes 4098 * (in particular its background) as well as the Button class's attributes. 4099 * 4100 * @param context The Context the view is running in, through which it can 4101 * access the current theme, resources, etc. 4102 * @param attrs The attributes of the XML tag that is inflating the view. 4103 * @param defStyleAttr An attribute in the current theme that contains a 4104 * reference to a style resource that supplies default values for 4105 * the view. Can be 0 to not look for defaults. 4106 * @see #View(Context, AttributeSet) 4107 */ 4108 public View(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { 4109 this(context, attrs, defStyleAttr, 0); 4110 } 4111 4112 /** 4113 * Perform inflation from XML and apply a class-specific base style from a 4114 * theme attribute or style resource. This constructor of View allows 4115 * subclasses to use their own base style when they are inflating. 4116 * <p> 4117 * When determining the final value of a particular attribute, there are 4118 * four inputs that come into play: 4119 * <ol> 4120 * <li>Any attribute values in the given AttributeSet. 4121 * <li>The style resource specified in the AttributeSet (named "style"). 4122 * <li>The default style specified by <var>defStyleAttr</var>. 4123 * <li>The default style specified by <var>defStyleRes</var>. 4124 * <li>The base values in this theme. 4125 * </ol> 4126 * <p> 4127 * Each of these inputs is considered in-order, with the first listed taking 4128 * precedence over the following ones. In other words, if in the 4129 * AttributeSet you have supplied <code><Button * textColor="#ff000000"></code> 4130 * , then the button's text will <em>always</em> be black, regardless of 4131 * what is specified in any of the styles. 4132 * 4133 * @param context The Context the view is running in, through which it can 4134 * access the current theme, resources, etc. 4135 * @param attrs The attributes of the XML tag that is inflating the view. 4136 * @param defStyleAttr An attribute in the current theme that contains a 4137 * reference to a style resource that supplies default values for 4138 * the view. Can be 0 to not look for defaults. 4139 * @param defStyleRes A resource identifier of a style resource that 4140 * supplies default values for the view, used only if 4141 * defStyleAttr is 0 or can not be found in the theme. Can be 0 4142 * to not look for defaults. 4143 * @see #View(Context, AttributeSet, int) 4144 */ 4145 public View(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) { 4146 this(context); 4147 4148 final TypedArray a = context.obtainStyledAttributes( 4149 attrs, com.android.internal.R.styleable.View, defStyleAttr, defStyleRes); 4150 4151 if (mDebugViewAttributes) { 4152 saveAttributeData(attrs, a); 4153 } 4154 4155 Drawable background = null; 4156 4157 int leftPadding = -1; 4158 int topPadding = -1; 4159 int rightPadding = -1; 4160 int bottomPadding = -1; 4161 int startPadding = UNDEFINED_PADDING; 4162 int endPadding = UNDEFINED_PADDING; 4163 4164 int padding = -1; 4165 4166 int viewFlagValues = 0; 4167 int viewFlagMasks = 0; 4168 4169 boolean setScrollContainer = false; 4170 4171 int x = 0; 4172 int y = 0; 4173 4174 float tx = 0; 4175 float ty = 0; 4176 float tz = 0; 4177 float elevation = 0; 4178 float rotation = 0; 4179 float rotationX = 0; 4180 float rotationY = 0; 4181 float sx = 1f; 4182 float sy = 1f; 4183 boolean transformSet = false; 4184 4185 int scrollbarStyle = SCROLLBARS_INSIDE_OVERLAY; 4186 int overScrollMode = mOverScrollMode; 4187 boolean initializeScrollbars = false; 4188 boolean initializeScrollIndicators = false; 4189 4190 boolean startPaddingDefined = false; 4191 boolean endPaddingDefined = false; 4192 boolean leftPaddingDefined = false; 4193 boolean rightPaddingDefined = false; 4194 4195 final int targetSdkVersion = context.getApplicationInfo().targetSdkVersion; 4196 4197 final int N = a.getIndexCount(); 4198 for (int i = 0; i < N; i++) { 4199 int attr = a.getIndex(i); 4200 switch (attr) { 4201 case com.android.internal.R.styleable.View_background: 4202 background = a.getDrawable(attr); 4203 break; 4204 case com.android.internal.R.styleable.View_padding: 4205 padding = a.getDimensionPixelSize(attr, -1); 4206 mUserPaddingLeftInitial = padding; 4207 mUserPaddingRightInitial = padding; 4208 leftPaddingDefined = true; 4209 rightPaddingDefined = true; 4210 break; 4211 case com.android.internal.R.styleable.View_paddingLeft: 4212 leftPadding = a.getDimensionPixelSize(attr, -1); 4213 mUserPaddingLeftInitial = leftPadding; 4214 leftPaddingDefined = true; 4215 break; 4216 case com.android.internal.R.styleable.View_paddingTop: 4217 topPadding = a.getDimensionPixelSize(attr, -1); 4218 break; 4219 case com.android.internal.R.styleable.View_paddingRight: 4220 rightPadding = a.getDimensionPixelSize(attr, -1); 4221 mUserPaddingRightInitial = rightPadding; 4222 rightPaddingDefined = true; 4223 break; 4224 case com.android.internal.R.styleable.View_paddingBottom: 4225 bottomPadding = a.getDimensionPixelSize(attr, -1); 4226 break; 4227 case com.android.internal.R.styleable.View_paddingStart: 4228 startPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); 4229 startPaddingDefined = (startPadding != UNDEFINED_PADDING); 4230 break; 4231 case com.android.internal.R.styleable.View_paddingEnd: 4232 endPadding = a.getDimensionPixelSize(attr, UNDEFINED_PADDING); 4233 endPaddingDefined = (endPadding != UNDEFINED_PADDING); 4234 break; 4235 case com.android.internal.R.styleable.View_scrollX: 4236 x = a.getDimensionPixelOffset(attr, 0); 4237 break; 4238 case com.android.internal.R.styleable.View_scrollY: 4239 y = a.getDimensionPixelOffset(attr, 0); 4240 break; 4241 case com.android.internal.R.styleable.View_alpha: 4242 setAlpha(a.getFloat(attr, 1f)); 4243 break; 4244 case com.android.internal.R.styleable.View_transformPivotX: 4245 setPivotX(a.getDimension(attr, 0)); 4246 break; 4247 case com.android.internal.R.styleable.View_transformPivotY: 4248 setPivotY(a.getDimension(attr, 0)); 4249 break; 4250 case com.android.internal.R.styleable.View_translationX: 4251 tx = a.getDimension(attr, 0); 4252 transformSet = true; 4253 break; 4254 case com.android.internal.R.styleable.View_translationY: 4255 ty = a.getDimension(attr, 0); 4256 transformSet = true; 4257 break; 4258 case com.android.internal.R.styleable.View_translationZ: 4259 tz = a.getDimension(attr, 0); 4260 transformSet = true; 4261 break; 4262 case com.android.internal.R.styleable.View_elevation: 4263 elevation = a.getDimension(attr, 0); 4264 transformSet = true; 4265 break; 4266 case com.android.internal.R.styleable.View_rotation: 4267 rotation = a.getFloat(attr, 0); 4268 transformSet = true; 4269 break; 4270 case com.android.internal.R.styleable.View_rotationX: 4271 rotationX = a.getFloat(attr, 0); 4272 transformSet = true; 4273 break; 4274 case com.android.internal.R.styleable.View_rotationY: 4275 rotationY = a.getFloat(attr, 0); 4276 transformSet = true; 4277 break; 4278 case com.android.internal.R.styleable.View_scaleX: 4279 sx = a.getFloat(attr, 1f); 4280 transformSet = true; 4281 break; 4282 case com.android.internal.R.styleable.View_scaleY: 4283 sy = a.getFloat(attr, 1f); 4284 transformSet = true; 4285 break; 4286 case com.android.internal.R.styleable.View_id: 4287 mID = a.getResourceId(attr, NO_ID); 4288 break; 4289 case com.android.internal.R.styleable.View_tag: 4290 mTag = a.getText(attr); 4291 break; 4292 case com.android.internal.R.styleable.View_fitsSystemWindows: 4293 if (a.getBoolean(attr, false)) { 4294 viewFlagValues |= FITS_SYSTEM_WINDOWS; 4295 viewFlagMasks |= FITS_SYSTEM_WINDOWS; 4296 } 4297 break; 4298 case com.android.internal.R.styleable.View_focusable: 4299 if (a.getBoolean(attr, false)) { 4300 viewFlagValues |= FOCUSABLE; 4301 viewFlagMasks |= FOCUSABLE_MASK; 4302 } 4303 break; 4304 case com.android.internal.R.styleable.View_focusableInTouchMode: 4305 if (a.getBoolean(attr, false)) { 4306 viewFlagValues |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE; 4307 viewFlagMasks |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE_MASK; 4308 } 4309 break; 4310 case com.android.internal.R.styleable.View_clickable: 4311 if (a.getBoolean(attr, false)) { 4312 viewFlagValues |= CLICKABLE; 4313 viewFlagMasks |= CLICKABLE; 4314 } 4315 break; 4316 case com.android.internal.R.styleable.View_longClickable: 4317 if (a.getBoolean(attr, false)) { 4318 viewFlagValues |= LONG_CLICKABLE; 4319 viewFlagMasks |= LONG_CLICKABLE; 4320 } 4321 break; 4322 case com.android.internal.R.styleable.View_contextClickable: 4323 if (a.getBoolean(attr, false)) { 4324 viewFlagValues |= CONTEXT_CLICKABLE; 4325 viewFlagMasks |= CONTEXT_CLICKABLE; 4326 } 4327 break; 4328 case com.android.internal.R.styleable.View_saveEnabled: 4329 if (!a.getBoolean(attr, true)) { 4330 viewFlagValues |= SAVE_DISABLED; 4331 viewFlagMasks |= SAVE_DISABLED_MASK; 4332 } 4333 break; 4334 case com.android.internal.R.styleable.View_duplicateParentState: 4335 if (a.getBoolean(attr, false)) { 4336 viewFlagValues |= DUPLICATE_PARENT_STATE; 4337 viewFlagMasks |= DUPLICATE_PARENT_STATE; 4338 } 4339 break; 4340 case com.android.internal.R.styleable.View_visibility: 4341 final int visibility = a.getInt(attr, 0); 4342 if (visibility != 0) { 4343 viewFlagValues |= VISIBILITY_FLAGS[visibility]; 4344 viewFlagMasks |= VISIBILITY_MASK; 4345 } 4346 break; 4347 case com.android.internal.R.styleable.View_layoutDirection: 4348 // Clear any layout direction flags (included resolved bits) already set 4349 mPrivateFlags2 &= 4350 ~(PFLAG2_LAYOUT_DIRECTION_MASK | PFLAG2_LAYOUT_DIRECTION_RESOLVED_MASK); 4351 // Set the layout direction flags depending on the value of the attribute 4352 final int layoutDirection = a.getInt(attr, -1); 4353 final int value = (layoutDirection != -1) ? 4354 LAYOUT_DIRECTION_FLAGS[layoutDirection] : LAYOUT_DIRECTION_DEFAULT; 4355 mPrivateFlags2 |= (value << PFLAG2_LAYOUT_DIRECTION_MASK_SHIFT); 4356 break; 4357 case com.android.internal.R.styleable.View_drawingCacheQuality: 4358 final int cacheQuality = a.getInt(attr, 0); 4359 if (cacheQuality != 0) { 4360 viewFlagValues |= DRAWING_CACHE_QUALITY_FLAGS[cacheQuality]; 4361 viewFlagMasks |= DRAWING_CACHE_QUALITY_MASK; 4362 } 4363 break; 4364 case com.android.internal.R.styleable.View_contentDescription: 4365 setContentDescription(a.getString(attr)); 4366 break; 4367 case com.android.internal.R.styleable.View_accessibilityTraversalBefore: 4368 setAccessibilityTraversalBefore(a.getResourceId(attr, NO_ID)); 4369 break; 4370 case com.android.internal.R.styleable.View_accessibilityTraversalAfter: 4371 setAccessibilityTraversalAfter(a.getResourceId(attr, NO_ID)); 4372 break; 4373 case com.android.internal.R.styleable.View_labelFor: 4374 setLabelFor(a.getResourceId(attr, NO_ID)); 4375 break; 4376 case com.android.internal.R.styleable.View_soundEffectsEnabled: 4377 if (!a.getBoolean(attr, true)) { 4378 viewFlagValues &= ~SOUND_EFFECTS_ENABLED; 4379 viewFlagMasks |= SOUND_EFFECTS_ENABLED; 4380 } 4381 break; 4382 case com.android.internal.R.styleable.View_hapticFeedbackEnabled: 4383 if (!a.getBoolean(attr, true)) { 4384 viewFlagValues &= ~HAPTIC_FEEDBACK_ENABLED; 4385 viewFlagMasks |= HAPTIC_FEEDBACK_ENABLED; 4386 } 4387 break; 4388 case R.styleable.View_scrollbars: 4389 final int scrollbars = a.getInt(attr, SCROLLBARS_NONE); 4390 if (scrollbars != SCROLLBARS_NONE) { 4391 viewFlagValues |= scrollbars; 4392 viewFlagMasks |= SCROLLBARS_MASK; 4393 initializeScrollbars = true; 4394 } 4395 break; 4396 //noinspection deprecation 4397 case R.styleable.View_fadingEdge: 4398 if (targetSdkVersion >= ICE_CREAM_SANDWICH) { 4399 // Ignore the attribute starting with ICS 4400 break; 4401 } 4402 // With builds < ICS, fall through and apply fading edges 4403 case R.styleable.View_requiresFadingEdge: 4404 final int fadingEdge = a.getInt(attr, FADING_EDGE_NONE); 4405 if (fadingEdge != FADING_EDGE_NONE) { 4406 viewFlagValues |= fadingEdge; 4407 viewFlagMasks |= FADING_EDGE_MASK; 4408 initializeFadingEdgeInternal(a); 4409 } 4410 break; 4411 case R.styleable.View_scrollbarStyle: 4412 scrollbarStyle = a.getInt(attr, SCROLLBARS_INSIDE_OVERLAY); 4413 if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { 4414 viewFlagValues |= scrollbarStyle & SCROLLBARS_STYLE_MASK; 4415 viewFlagMasks |= SCROLLBARS_STYLE_MASK; 4416 } 4417 break; 4418 case R.styleable.View_isScrollContainer: 4419 setScrollContainer = true; 4420 if (a.getBoolean(attr, false)) { 4421 setScrollContainer(true); 4422 } 4423 break; 4424 case com.android.internal.R.styleable.View_keepScreenOn: 4425 if (a.getBoolean(attr, false)) { 4426 viewFlagValues |= KEEP_SCREEN_ON; 4427 viewFlagMasks |= KEEP_SCREEN_ON; 4428 } 4429 break; 4430 case R.styleable.View_filterTouchesWhenObscured: 4431 if (a.getBoolean(attr, false)) { 4432 viewFlagValues |= FILTER_TOUCHES_WHEN_OBSCURED; 4433 viewFlagMasks |= FILTER_TOUCHES_WHEN_OBSCURED; 4434 } 4435 break; 4436 case R.styleable.View_nextFocusLeft: 4437 mNextFocusLeftId = a.getResourceId(attr, View.NO_ID); 4438 break; 4439 case R.styleable.View_nextFocusRight: 4440 mNextFocusRightId = a.getResourceId(attr, View.NO_ID); 4441 break; 4442 case R.styleable.View_nextFocusUp: 4443 mNextFocusUpId = a.getResourceId(attr, View.NO_ID); 4444 break; 4445 case R.styleable.View_nextFocusDown: 4446 mNextFocusDownId = a.getResourceId(attr, View.NO_ID); 4447 break; 4448 case R.styleable.View_nextFocusForward: 4449 mNextFocusForwardId = a.getResourceId(attr, View.NO_ID); 4450 break; 4451 case R.styleable.View_minWidth: 4452 mMinWidth = a.getDimensionPixelSize(attr, 0); 4453 break; 4454 case R.styleable.View_minHeight: 4455 mMinHeight = a.getDimensionPixelSize(attr, 0); 4456 break; 4457 case R.styleable.View_onClick: 4458 if (context.isRestricted()) { 4459 throw new IllegalStateException("The android:onClick attribute cannot " 4460 + "be used within a restricted context"); 4461 } 4462 4463 final String handlerName = a.getString(attr); 4464 if (handlerName != null) { 4465 setOnClickListener(new DeclaredOnClickListener(this, handlerName)); 4466 } 4467 break; 4468 case R.styleable.View_overScrollMode: 4469 overScrollMode = a.getInt(attr, OVER_SCROLL_IF_CONTENT_SCROLLS); 4470 break; 4471 case R.styleable.View_verticalScrollbarPosition: 4472 mVerticalScrollbarPosition = a.getInt(attr, SCROLLBAR_POSITION_DEFAULT); 4473 break; 4474 case R.styleable.View_layerType: 4475 setLayerType(a.getInt(attr, LAYER_TYPE_NONE), null); 4476 break; 4477 case R.styleable.View_textDirection: 4478 // Clear any text direction flag already set 4479 mPrivateFlags2 &= ~PFLAG2_TEXT_DIRECTION_MASK; 4480 // Set the text direction flags depending on the value of the attribute 4481 final int textDirection = a.getInt(attr, -1); 4482 if (textDirection != -1) { 4483 mPrivateFlags2 |= PFLAG2_TEXT_DIRECTION_FLAGS[textDirection]; 4484 } 4485 break; 4486 case R.styleable.View_textAlignment: 4487 // Clear any text alignment flag already set 4488 mPrivateFlags2 &= ~PFLAG2_TEXT_ALIGNMENT_MASK; 4489 // Set the text alignment flag depending on the value of the attribute 4490 final int textAlignment = a.getInt(attr, TEXT_ALIGNMENT_DEFAULT); 4491 mPrivateFlags2 |= PFLAG2_TEXT_ALIGNMENT_FLAGS[textAlignment]; 4492 break; 4493 case R.styleable.View_importantForAccessibility: 4494 setImportantForAccessibility(a.getInt(attr, 4495 IMPORTANT_FOR_ACCESSIBILITY_DEFAULT)); 4496 break; 4497 case R.styleable.View_accessibilityLiveRegion: 4498 setAccessibilityLiveRegion(a.getInt(attr, ACCESSIBILITY_LIVE_REGION_DEFAULT)); 4499 break; 4500 case R.styleable.View_transitionName: 4501 setTransitionName(a.getString(attr)); 4502 break; 4503 case R.styleable.View_nestedScrollingEnabled: 4504 setNestedScrollingEnabled(a.getBoolean(attr, false)); 4505 break; 4506 case R.styleable.View_stateListAnimator: 4507 setStateListAnimator(AnimatorInflater.loadStateListAnimator(context, 4508 a.getResourceId(attr, 0))); 4509 break; 4510 case R.styleable.View_backgroundTint: 4511 // This will get applied later during setBackground(). 4512 if (mBackgroundTint == null) { 4513 mBackgroundTint = new TintInfo(); 4514 } 4515 mBackgroundTint.mTintList = a.getColorStateList( 4516 R.styleable.View_backgroundTint); 4517 mBackgroundTint.mHasTintList = true; 4518 break; 4519 case R.styleable.View_backgroundTintMode: 4520 // This will get applied later during setBackground(). 4521 if (mBackgroundTint == null) { 4522 mBackgroundTint = new TintInfo(); 4523 } 4524 mBackgroundTint.mTintMode = Drawable.parseTintMode(a.getInt( 4525 R.styleable.View_backgroundTintMode, -1), null); 4526 mBackgroundTint.mHasTintMode = true; 4527 break; 4528 case R.styleable.View_outlineProvider: 4529 setOutlineProviderFromAttribute(a.getInt(R.styleable.View_outlineProvider, 4530 PROVIDER_BACKGROUND)); 4531 break; 4532 case R.styleable.View_foreground: 4533 if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { 4534 setForeground(a.getDrawable(attr)); 4535 } 4536 break; 4537 case R.styleable.View_foregroundGravity: 4538 if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { 4539 setForegroundGravity(a.getInt(attr, Gravity.NO_GRAVITY)); 4540 } 4541 break; 4542 case R.styleable.View_foregroundTintMode: 4543 if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { 4544 setForegroundTintMode(Drawable.parseTintMode(a.getInt(attr, -1), null)); 4545 } 4546 break; 4547 case R.styleable.View_foregroundTint: 4548 if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { 4549 setForegroundTintList(a.getColorStateList(attr)); 4550 } 4551 break; 4552 case R.styleable.View_foregroundInsidePadding: 4553 if (targetSdkVersion >= VERSION_CODES.M || this instanceof FrameLayout) { 4554 if (mForegroundInfo == null) { 4555 mForegroundInfo = new ForegroundInfo(); 4556 } 4557 mForegroundInfo.mInsidePadding = a.getBoolean(attr, 4558 mForegroundInfo.mInsidePadding); 4559 } 4560 break; 4561 case R.styleable.View_scrollIndicators: 4562 final int scrollIndicators = 4563 (a.getInt(attr, 0) << SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT) 4564 & SCROLL_INDICATORS_PFLAG3_MASK; 4565 if (scrollIndicators != 0) { 4566 mPrivateFlags3 |= scrollIndicators; 4567 initializeScrollIndicators = true; 4568 } 4569 break; 4570 case R.styleable.View_pointerIcon: 4571 final int resourceId = a.getResourceId(attr, 0); 4572 if (resourceId != 0) { 4573 setPointerIcon(PointerIcon.load( 4574 context.getResources(), resourceId)); 4575 } else { 4576 final int pointerType = a.getInt(attr, PointerIcon.TYPE_NOT_SPECIFIED); 4577 if (pointerType != PointerIcon.TYPE_NOT_SPECIFIED) { 4578 setPointerIcon(PointerIcon.getSystemIcon(context, pointerType)); 4579 } 4580 } 4581 break; 4582 case R.styleable.View_forceHasOverlappingRendering: 4583 if (a.peekValue(attr) != null) { 4584 forceHasOverlappingRendering(a.getBoolean(attr, true)); 4585 } 4586 break; 4587 4588 } 4589 } 4590 4591 setOverScrollMode(overScrollMode); 4592 4593 // Cache start/end user padding as we cannot fully resolve padding here (we dont have yet 4594 // the resolved layout direction). Those cached values will be used later during padding 4595 // resolution. 4596 mUserPaddingStart = startPadding; 4597 mUserPaddingEnd = endPadding; 4598 4599 if (background != null) { 4600 setBackground(background); 4601 } 4602 4603 // setBackground above will record that padding is currently provided by the background. 4604 // If we have padding specified via xml, record that here instead and use it. 4605 mLeftPaddingDefined = leftPaddingDefined; 4606 mRightPaddingDefined = rightPaddingDefined; 4607 4608 if (padding >= 0) { 4609 leftPadding = padding; 4610 topPadding = padding; 4611 rightPadding = padding; 4612 bottomPadding = padding; 4613 mUserPaddingLeftInitial = padding; 4614 mUserPaddingRightInitial = padding; 4615 } 4616 4617 if (isRtlCompatibilityMode()) { 4618 // RTL compatibility mode: pre Jelly Bean MR1 case OR no RTL support case. 4619 // left / right padding are used if defined (meaning here nothing to do). If they are not 4620 // defined and start / end padding are defined (e.g. in Frameworks resources), then we use 4621 // start / end and resolve them as left / right (layout direction is not taken into account). 4622 // Padding from the background drawable is stored at this point in mUserPaddingLeftInitial 4623 // and mUserPaddingRightInitial) so drawable padding will be used as ultimate default if 4624 // defined. 4625 if (!mLeftPaddingDefined && startPaddingDefined) { 4626 leftPadding = startPadding; 4627 } 4628 mUserPaddingLeftInitial = (leftPadding >= 0) ? leftPadding : mUserPaddingLeftInitial; 4629 if (!mRightPaddingDefined && endPaddingDefined) { 4630 rightPadding = endPadding; 4631 } 4632 mUserPaddingRightInitial = (rightPadding >= 0) ? rightPadding : mUserPaddingRightInitial; 4633 } else { 4634 // Jelly Bean MR1 and after case: if start/end defined, they will override any left/right 4635 // values defined. Otherwise, left /right values are used. 4636 // Padding from the background drawable is stored at this point in mUserPaddingLeftInitial 4637 // and mUserPaddingRightInitial) so drawable padding will be used as ultimate default if 4638 // defined. 4639 final boolean hasRelativePadding = startPaddingDefined || endPaddingDefined; 4640 4641 if (mLeftPaddingDefined && !hasRelativePadding) { 4642 mUserPaddingLeftInitial = leftPadding; 4643 } 4644 if (mRightPaddingDefined && !hasRelativePadding) { 4645 mUserPaddingRightInitial = rightPadding; 4646 } 4647 } 4648 4649 internalSetPadding( 4650 mUserPaddingLeftInitial, 4651 topPadding >= 0 ? topPadding : mPaddingTop, 4652 mUserPaddingRightInitial, 4653 bottomPadding >= 0 ? bottomPadding : mPaddingBottom); 4654 4655 if (viewFlagMasks != 0) { 4656 setFlags(viewFlagValues, viewFlagMasks); 4657 } 4658 4659 if (initializeScrollbars) { 4660 initializeScrollbarsInternal(a); 4661 } 4662 4663 if (initializeScrollIndicators) { 4664 initializeScrollIndicatorsInternal(); 4665 } 4666 4667 a.recycle(); 4668 4669 // Needs to be called after mViewFlags is set 4670 if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { 4671 recomputePadding(); 4672 } 4673 4674 if (x != 0 || y != 0) { 4675 scrollTo(x, y); 4676 } 4677 4678 if (transformSet) { 4679 setTranslationX(tx); 4680 setTranslationY(ty); 4681 setTranslationZ(tz); 4682 setElevation(elevation); 4683 setRotation(rotation); 4684 setRotationX(rotationX); 4685 setRotationY(rotationY); 4686 setScaleX(sx); 4687 setScaleY(sy); 4688 } 4689 4690 if (!setScrollContainer && (viewFlagValues&SCROLLBARS_VERTICAL) != 0) { 4691 setScrollContainer(true); 4692 } 4693 4694 computeOpaqueFlags(); 4695 } 4696 4697 /** 4698 * An implementation of OnClickListener that attempts to lazily load a 4699 * named click handling method from a parent or ancestor context. 4700 */ 4701 private static class DeclaredOnClickListener implements OnClickListener { 4702 private final View mHostView; 4703 private final String mMethodName; 4704 4705 private Method mResolvedMethod; 4706 private Context mResolvedContext; 4707 4708 public DeclaredOnClickListener(@NonNull View hostView, @NonNull String methodName) { 4709 mHostView = hostView; 4710 mMethodName = methodName; 4711 } 4712 4713 @Override 4714 public void onClick(@NonNull View v) { 4715 if (mResolvedMethod == null) { 4716 resolveMethod(mHostView.getContext(), mMethodName); 4717 } 4718 4719 try { 4720 mResolvedMethod.invoke(mResolvedContext, v); 4721 } catch (IllegalAccessException e) { 4722 throw new IllegalStateException( 4723 "Could not execute non-public method for android:onClick", e); 4724 } catch (InvocationTargetException e) { 4725 throw new IllegalStateException( 4726 "Could not execute method for android:onClick", e); 4727 } 4728 } 4729 4730 @NonNull 4731 private void resolveMethod(@Nullable Context context, @NonNull String name) { 4732 while (context != null) { 4733 try { 4734 if (!context.isRestricted()) { 4735 final Method method = context.getClass().getMethod(mMethodName, View.class); 4736 if (method != null) { 4737 mResolvedMethod = method; 4738 mResolvedContext = context; 4739 return; 4740 } 4741 } 4742 } catch (NoSuchMethodException e) { 4743 // Failed to find method, keep searching up the hierarchy. 4744 } 4745 4746 if (context instanceof ContextWrapper) { 4747 context = ((ContextWrapper) context).getBaseContext(); 4748 } else { 4749 // Can't search up the hierarchy, null out and fail. 4750 context = null; 4751 } 4752 } 4753 4754 final int id = mHostView.getId(); 4755 final String idText = id == NO_ID ? "" : " with id '" 4756 + mHostView.getContext().getResources().getResourceEntryName(id) + "'"; 4757 throw new IllegalStateException("Could not find method " + mMethodName 4758 + "(View) in a parent or ancestor Context for android:onClick " 4759 + "attribute defined on view " + mHostView.getClass() + idText); 4760 } 4761 } 4762 4763 /** 4764 * Non-public constructor for use in testing 4765 */ 4766 View() { 4767 mResources = null; 4768 mRenderNode = RenderNode.create(getClass().getName(), this); 4769 } 4770 4771 private static SparseArray<String> getAttributeMap() { 4772 if (mAttributeMap == null) { 4773 mAttributeMap = new SparseArray<>(); 4774 } 4775 return mAttributeMap; 4776 } 4777 4778 private void saveAttributeData(@Nullable AttributeSet attrs, @NonNull TypedArray t) { 4779 final int attrsCount = attrs == null ? 0 : attrs.getAttributeCount(); 4780 final int indexCount = t.getIndexCount(); 4781 final String[] attributes = new String[(attrsCount + indexCount) * 2]; 4782 4783 int i = 0; 4784 4785 // Store raw XML attributes. 4786 for (int j = 0; j < attrsCount; ++j) { 4787 attributes[i] = attrs.getAttributeName(j); 4788 attributes[i + 1] = attrs.getAttributeValue(j); 4789 i += 2; 4790 } 4791 4792 // Store resolved styleable attributes. 4793 final Resources res = t.getResources(); 4794 final SparseArray<String> attributeMap = getAttributeMap(); 4795 for (int j = 0; j < indexCount; ++j) { 4796 final int index = t.getIndex(j); 4797 if (!t.hasValueOrEmpty(index)) { 4798 // Value is undefined. Skip it. 4799 continue; 4800 } 4801 4802 final int resourceId = t.getResourceId(index, 0); 4803 if (resourceId == 0) { 4804 // Value is not a reference. Skip it. 4805 continue; 4806 } 4807 4808 String resourceName = attributeMap.get(resourceId); 4809 if (resourceName == null) { 4810 try { 4811 resourceName = res.getResourceName(resourceId); 4812 } catch (Resources.NotFoundException e) { 4813 resourceName = "0x" + Integer.toHexString(resourceId); 4814 } 4815 attributeMap.put(resourceId, resourceName); 4816 } 4817 4818 attributes[i] = resourceName; 4819 attributes[i + 1] = t.getString(index); 4820 i += 2; 4821 } 4822 4823 // Trim to fit contents. 4824 final String[] trimmed = new String[i]; 4825 System.arraycopy(attributes, 0, trimmed, 0, i); 4826 mAttributes = trimmed; 4827 } 4828 4829 public String toString() { 4830 StringBuilder out = new StringBuilder(128); 4831 out.append(getClass().getName()); 4832 out.append('{'); 4833 out.append(Integer.toHexString(System.identityHashCode(this))); 4834 out.append(' '); 4835 switch (mViewFlags&VISIBILITY_MASK) { 4836 case VISIBLE: out.append('V'); break; 4837 case INVISIBLE: out.append('I'); break; 4838 case GONE: out.append('G'); break; 4839 default: out.append('.'); break; 4840 } 4841 out.append((mViewFlags&FOCUSABLE_MASK) == FOCUSABLE ? 'F' : '.'); 4842 out.append((mViewFlags&ENABLED_MASK) == ENABLED ? 'E' : '.'); 4843 out.append((mViewFlags&DRAW_MASK) == WILL_NOT_DRAW ? '.' : 'D'); 4844 out.append((mViewFlags&SCROLLBARS_HORIZONTAL) != 0 ? 'H' : '.'); 4845 out.append((mViewFlags&SCROLLBARS_VERTICAL) != 0 ? 'V' : '.'); 4846 out.append((mViewFlags&CLICKABLE) != 0 ? 'C' : '.'); 4847 out.append((mViewFlags&LONG_CLICKABLE) != 0 ? 'L' : '.'); 4848 out.append((mViewFlags&CONTEXT_CLICKABLE) != 0 ? 'X' : '.'); 4849 out.append(' '); 4850 out.append((mPrivateFlags&PFLAG_IS_ROOT_NAMESPACE) != 0 ? 'R' : '.'); 4851 out.append((mPrivateFlags&PFLAG_FOCUSED) != 0 ? 'F' : '.'); 4852 out.append((mPrivateFlags&PFLAG_SELECTED) != 0 ? 'S' : '.'); 4853 if ((mPrivateFlags&PFLAG_PREPRESSED) != 0) { 4854 out.append('p'); 4855 } else { 4856 out.append((mPrivateFlags&PFLAG_PRESSED) != 0 ? 'P' : '.'); 4857 } 4858 out.append((mPrivateFlags&PFLAG_HOVERED) != 0 ? 'H' : '.'); 4859 out.append((mPrivateFlags&PFLAG_ACTIVATED) != 0 ? 'A' : '.'); 4860 out.append((mPrivateFlags&PFLAG_INVALIDATED) != 0 ? 'I' : '.'); 4861 out.append((mPrivateFlags&PFLAG_DIRTY_MASK) != 0 ? 'D' : '.'); 4862 out.append(' '); 4863 out.append(mLeft); 4864 out.append(','); 4865 out.append(mTop); 4866 out.append('-'); 4867 out.append(mRight); 4868 out.append(','); 4869 out.append(mBottom); 4870 final int id = getId(); 4871 if (id != NO_ID) { 4872 out.append(" #"); 4873 out.append(Integer.toHexString(id)); 4874 final Resources r = mResources; 4875 if (id > 0 && Resources.resourceHasPackage(id) && r != null) { 4876 try { 4877 String pkgname; 4878 switch (id&0xff000000) { 4879 case 0x7f000000: 4880 pkgname="app"; 4881 break; 4882 case 0x01000000: 4883 pkgname="android"; 4884 break; 4885 default: 4886 pkgname = r.getResourcePackageName(id); 4887 break; 4888 } 4889 String typename = r.getResourceTypeName(id); 4890 String entryname = r.getResourceEntryName(id); 4891 out.append(" "); 4892 out.append(pkgname); 4893 out.append(":"); 4894 out.append(typename); 4895 out.append("/"); 4896 out.append(entryname); 4897 } catch (Resources.NotFoundException e) { 4898 } 4899 } 4900 } 4901 out.append("}"); 4902 return out.toString(); 4903 } 4904 4905 /** 4906 * <p> 4907 * Initializes the fading edges from a given set of styled attributes. This 4908 * method should be called by subclasses that need fading edges and when an 4909 * instance of these subclasses is created programmatically rather than 4910 * being inflated from XML. This method is automatically called when the XML 4911 * is inflated. 4912 * </p> 4913 * 4914 * @param a the styled attributes set to initialize the fading edges from 4915 * 4916 * @removed 4917 */ 4918 protected void initializeFadingEdge(TypedArray a) { 4919 // This method probably shouldn't have been included in the SDK to begin with. 4920 // It relies on 'a' having been initialized using an attribute filter array that is 4921 // not publicly available to the SDK. The old method has been renamed 4922 // to initializeFadingEdgeInternal and hidden for framework use only; 4923 // this one initializes using defaults to make it safe to call for apps. 4924 4925 TypedArray arr = mContext.obtainStyledAttributes(com.android.internal.R.styleable.View); 4926 4927 initializeFadingEdgeInternal(arr); 4928 4929 arr.recycle(); 4930 } 4931 4932 /** 4933 * <p> 4934 * Initializes the fading edges from a given set of styled attributes. This 4935 * method should be called by subclasses that need fading edges and when an 4936 * instance of these subclasses is created programmatically rather than 4937 * being inflated from XML. This method is automatically called when the XML 4938 * is inflated. 4939 * </p> 4940 * 4941 * @param a the styled attributes set to initialize the fading edges from 4942 * @hide This is the real method; the public one is shimmed to be safe to call from apps. 4943 */ 4944 protected void initializeFadingEdgeInternal(TypedArray a) { 4945 initScrollCache(); 4946 4947 mScrollCache.fadingEdgeLength = a.getDimensionPixelSize( 4948 R.styleable.View_fadingEdgeLength, 4949 ViewConfiguration.get(mContext).getScaledFadingEdgeLength()); 4950 } 4951 4952 /** 4953 * Returns the size of the vertical faded edges used to indicate that more 4954 * content in this view is visible. 4955 * 4956 * @return The size in pixels of the vertical faded edge or 0 if vertical 4957 * faded edges are not enabled for this view. 4958 * @attr ref android.R.styleable#View_fadingEdgeLength 4959 */ 4960 public int getVerticalFadingEdgeLength() { 4961 if (isVerticalFadingEdgeEnabled()) { 4962 ScrollabilityCache cache = mScrollCache; 4963 if (cache != null) { 4964 return cache.fadingEdgeLength; 4965 } 4966 } 4967 return 0; 4968 } 4969 4970 /** 4971 * Set the size of the faded edge used to indicate that more content in this 4972 * view is available. Will not change whether the fading edge is enabled; use 4973 * {@link #setVerticalFadingEdgeEnabled(boolean)} or 4974 * {@link #setHorizontalFadingEdgeEnabled(boolean)} to enable the fading edge 4975 * for the vertical or horizontal fading edges. 4976 * 4977 * @param length The size in pixels of the faded edge used to indicate that more 4978 * content in this view is visible. 4979 */ 4980 public void setFadingEdgeLength(int length) { 4981 initScrollCache(); 4982 mScrollCache.fadingEdgeLength = length; 4983 } 4984 4985 /** 4986 * Returns the size of the horizontal faded edges used to indicate that more 4987 * content in this view is visible. 4988 * 4989 * @return The size in pixels of the horizontal faded edge or 0 if horizontal 4990 * faded edges are not enabled for this view. 4991 * @attr ref android.R.styleable#View_fadingEdgeLength 4992 */ 4993 public int getHorizontalFadingEdgeLength() { 4994 if (isHorizontalFadingEdgeEnabled()) { 4995 ScrollabilityCache cache = mScrollCache; 4996 if (cache != null) { 4997 return cache.fadingEdgeLength; 4998 } 4999 } 5000 return 0; 5001 } 5002 5003 /** 5004 * Returns the width of the vertical scrollbar. 5005 * 5006 * @return The width in pixels of the vertical scrollbar or 0 if there 5007 * is no vertical scrollbar. 5008 */ 5009 public int getVerticalScrollbarWidth() { 5010 ScrollabilityCache cache = mScrollCache; 5011 if (cache != null) { 5012 ScrollBarDrawable scrollBar = cache.scrollBar; 5013 if (scrollBar != null) { 5014 int size = scrollBar.getSize(true); 5015 if (size <= 0) { 5016 size = cache.scrollBarSize; 5017 } 5018 return size; 5019 } 5020 return 0; 5021 } 5022 return 0; 5023 } 5024 5025 /** 5026 * Returns the height of the horizontal scrollbar. 5027 * 5028 * @return The height in pixels of the horizontal scrollbar or 0 if 5029 * there is no horizontal scrollbar. 5030 */ 5031 protected int getHorizontalScrollbarHeight() { 5032 ScrollabilityCache cache = mScrollCache; 5033 if (cache != null) { 5034 ScrollBarDrawable scrollBar = cache.scrollBar; 5035 if (scrollBar != null) { 5036 int size = scrollBar.getSize(false); 5037 if (size <= 0) { 5038 size = cache.scrollBarSize; 5039 } 5040 return size; 5041 } 5042 return 0; 5043 } 5044 return 0; 5045 } 5046 5047 /** 5048 * <p> 5049 * Initializes the scrollbars from a given set of styled attributes. This 5050 * method should be called by subclasses that need scrollbars and when an 5051 * instance of these subclasses is created programmatically rather than 5052 * being inflated from XML. This method is automatically called when the XML 5053 * is inflated. 5054 * </p> 5055 * 5056 * @param a the styled attributes set to initialize the scrollbars from 5057 * 5058 * @removed 5059 */ 5060 protected void initializeScrollbars(TypedArray a) { 5061 // It's not safe to use this method from apps. The parameter 'a' must have been obtained 5062 // using the View filter array which is not available to the SDK. As such, internal 5063 // framework usage now uses initializeScrollbarsInternal and we grab a default 5064 // TypedArray with the right filter instead here. 5065 TypedArray arr = mContext.obtainStyledAttributes(com.android.internal.R.styleable.View); 5066 5067 initializeScrollbarsInternal(arr); 5068 5069 // We ignored the method parameter. Recycle the one we actually did use. 5070 arr.recycle(); 5071 } 5072 5073 /** 5074 * <p> 5075 * Initializes the scrollbars from a given set of styled attributes. This 5076 * method should be called by subclasses that need scrollbars and when an 5077 * instance of these subclasses is created programmatically rather than 5078 * being inflated from XML. This method is automatically called when the XML 5079 * is inflated. 5080 * </p> 5081 * 5082 * @param a the styled attributes set to initialize the scrollbars from 5083 * @hide 5084 */ 5085 protected void initializeScrollbarsInternal(TypedArray a) { 5086 initScrollCache(); 5087 5088 final ScrollabilityCache scrollabilityCache = mScrollCache; 5089 5090 if (scrollabilityCache.scrollBar == null) { 5091 scrollabilityCache.scrollBar = new ScrollBarDrawable(); 5092 scrollabilityCache.scrollBar.setState(getDrawableState()); 5093 scrollabilityCache.scrollBar.setCallback(this); 5094 } 5095 5096 final boolean fadeScrollbars = a.getBoolean(R.styleable.View_fadeScrollbars, true); 5097 5098 if (!fadeScrollbars) { 5099 scrollabilityCache.state = ScrollabilityCache.ON; 5100 } 5101 scrollabilityCache.fadeScrollBars = fadeScrollbars; 5102 5103 5104 scrollabilityCache.scrollBarFadeDuration = a.getInt( 5105 R.styleable.View_scrollbarFadeDuration, ViewConfiguration 5106 .getScrollBarFadeDuration()); 5107 scrollabilityCache.scrollBarDefaultDelayBeforeFade = a.getInt( 5108 R.styleable.View_scrollbarDefaultDelayBeforeFade, 5109 ViewConfiguration.getScrollDefaultDelay()); 5110 5111 5112 scrollabilityCache.scrollBarSize = a.getDimensionPixelSize( 5113 com.android.internal.R.styleable.View_scrollbarSize, 5114 ViewConfiguration.get(mContext).getScaledScrollBarSize()); 5115 5116 Drawable track = a.getDrawable(R.styleable.View_scrollbarTrackHorizontal); 5117 scrollabilityCache.scrollBar.setHorizontalTrackDrawable(track); 5118 5119 Drawable thumb = a.getDrawable(R.styleable.View_scrollbarThumbHorizontal); 5120 if (thumb != null) { 5121 scrollabilityCache.scrollBar.setHorizontalThumbDrawable(thumb); 5122 } 5123 5124 boolean alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawHorizontalTrack, 5125 false); 5126 if (alwaysDraw) { 5127 scrollabilityCache.scrollBar.setAlwaysDrawHorizontalTrack(true); 5128 } 5129 5130 track = a.getDrawable(R.styleable.View_scrollbarTrackVertical); 5131 scrollabilityCache.scrollBar.setVerticalTrackDrawable(track); 5132 5133 thumb = a.getDrawable(R.styleable.View_scrollbarThumbVertical); 5134 if (thumb != null) { 5135 scrollabilityCache.scrollBar.setVerticalThumbDrawable(thumb); 5136 } 5137 5138 alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawVerticalTrack, 5139 false); 5140 if (alwaysDraw) { 5141 scrollabilityCache.scrollBar.setAlwaysDrawVerticalTrack(true); 5142 } 5143 5144 // Apply layout direction to the new Drawables if needed 5145 final int layoutDirection = getLayoutDirection(); 5146 if (track != null) { 5147 track.setLayoutDirection(layoutDirection); 5148 } 5149 if (thumb != null) { 5150 thumb.setLayoutDirection(layoutDirection); 5151 } 5152 5153 // Re-apply user/background padding so that scrollbar(s) get added 5154 resolvePadding(); 5155 } 5156 5157 private void initializeScrollIndicatorsInternal() { 5158 // Some day maybe we'll break this into top/left/start/etc. and let the 5159 // client control it. Until then, you can have any scroll indicator you 5160 // want as long as it's a 1dp foreground-colored rectangle. 5161 if (mScrollIndicatorDrawable == null) { 5162 mScrollIndicatorDrawable = mContext.getDrawable(R.drawable.scroll_indicator_material); 5163 } 5164 } 5165 5166 /** 5167 * <p> 5168 * Initalizes the scrollability cache if necessary. 5169 * </p> 5170 */ 5171 private void initScrollCache() { 5172 if (mScrollCache == null) { 5173 mScrollCache = new ScrollabilityCache(ViewConfiguration.get(mContext), this); 5174 } 5175 } 5176 5177 private ScrollabilityCache getScrollCache() { 5178 initScrollCache(); 5179 return mScrollCache; 5180 } 5181 5182 /** 5183 * Set the position of the vertical scroll bar. Should be one of 5184 * {@link #SCROLLBAR_POSITION_DEFAULT}, {@link #SCROLLBAR_POSITION_LEFT} or 5185 * {@link #SCROLLBAR_POSITION_RIGHT}. 5186 * 5187 * @param position Where the vertical scroll bar should be positioned. 5188 */ 5189 public void setVerticalScrollbarPosition(int position) { 5190 if (mVerticalScrollbarPosition != position) { 5191 mVerticalScrollbarPosition = position; 5192 computeOpaqueFlags(); 5193 resolvePadding(); 5194 } 5195 } 5196 5197 /** 5198 * @return The position where the vertical scroll bar will show, if applicable. 5199 * @see #setVerticalScrollbarPosition(int) 5200 */ 5201 public int getVerticalScrollbarPosition() { 5202 return mVerticalScrollbarPosition; 5203 } 5204 5205 boolean isOnScrollbar(float x, float y) { 5206 if (mScrollCache == null) { 5207 return false; 5208 } 5209 x += getScrollX(); 5210 y += getScrollY(); 5211 if (isVerticalScrollBarEnabled() && !isVerticalScrollBarHidden()) { 5212 final Rect bounds = mScrollCache.mScrollBarBounds; 5213 getVerticalScrollBarBounds(bounds); 5214 if (bounds.contains((int)x, (int)y)) { 5215 return true; 5216 } 5217 } 5218 if (isHorizontalScrollBarEnabled()) { 5219 final Rect bounds = mScrollCache.mScrollBarBounds; 5220 getHorizontalScrollBarBounds(bounds); 5221 if (bounds.contains((int)x, (int)y)) { 5222 return true; 5223 } 5224 } 5225 return false; 5226 } 5227 5228 boolean isOnScrollbarThumb(float x, float y) { 5229 return isOnVerticalScrollbarThumb(x, y) || isOnHorizontalScrollbarThumb(x, y); 5230 } 5231 5232 private boolean isOnVerticalScrollbarThumb(float x, float y) { 5233 if (mScrollCache == null) { 5234 return false; 5235 } 5236 if (isVerticalScrollBarEnabled() && !isVerticalScrollBarHidden()) { 5237 x += getScrollX(); 5238 y += getScrollY(); 5239 final Rect bounds = mScrollCache.mScrollBarBounds; 5240 getVerticalScrollBarBounds(bounds); 5241 final int range = computeVerticalScrollRange(); 5242 final int offset = computeVerticalScrollOffset(); 5243 final int extent = computeVerticalScrollExtent(); 5244 final int thumbLength = ScrollBarUtils.getThumbLength(bounds.height(), bounds.width(), 5245 extent, range); 5246 final int thumbOffset = ScrollBarUtils.getThumbOffset(bounds.height(), thumbLength, 5247 extent, range, offset); 5248 final int thumbTop = bounds.top + thumbOffset; 5249 if (x >= bounds.left && x <= bounds.right && y >= thumbTop 5250 && y <= thumbTop + thumbLength) { 5251 return true; 5252 } 5253 } 5254 return false; 5255 } 5256 5257 private boolean isOnHorizontalScrollbarThumb(float x, float y) { 5258 if (mScrollCache == null) { 5259 return false; 5260 } 5261 if (isHorizontalScrollBarEnabled()) { 5262 x += getScrollX(); 5263 y += getScrollY(); 5264 final Rect bounds = mScrollCache.mScrollBarBounds; 5265 getHorizontalScrollBarBounds(bounds); 5266 final int range = computeHorizontalScrollRange(); 5267 final int offset = computeHorizontalScrollOffset(); 5268 final int extent = computeHorizontalScrollExtent(); 5269 final int thumbLength = ScrollBarUtils.getThumbLength(bounds.width(), bounds.height(), 5270 extent, range); 5271 final int thumbOffset = ScrollBarUtils.getThumbOffset(bounds.width(), thumbLength, 5272 extent, range, offset); 5273 final int thumbLeft = bounds.left + thumbOffset; 5274 if (x >= thumbLeft && x <= thumbLeft + thumbLength && y >= bounds.top 5275 && y <= bounds.bottom) { 5276 return true; 5277 } 5278 } 5279 return false; 5280 } 5281 5282 boolean isDraggingScrollBar() { 5283 return mScrollCache != null 5284 && mScrollCache.mScrollBarDraggingState != ScrollabilityCache.NOT_DRAGGING; 5285 } 5286 5287 /** 5288 * Sets the state of all scroll indicators. 5289 * <p> 5290 * See {@link #setScrollIndicators(int, int)} for usage information. 5291 * 5292 * @param indicators a bitmask of indicators that should be enabled, or 5293 * {@code 0} to disable all indicators 5294 * @see #setScrollIndicators(int, int) 5295 * @see #getScrollIndicators() 5296 * @attr ref android.R.styleable#View_scrollIndicators 5297 */ 5298 public void setScrollIndicators(@ScrollIndicators int indicators) { 5299 setScrollIndicators(indicators, 5300 SCROLL_INDICATORS_PFLAG3_MASK >>> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT); 5301 } 5302 5303 /** 5304 * Sets the state of the scroll indicators specified by the mask. To change 5305 * all scroll indicators at once, see {@link #setScrollIndicators(int)}. 5306 * <p> 5307 * When a scroll indicator is enabled, it will be displayed if the view 5308 * can scroll in the direction of the indicator. 5309 * <p> 5310 * Multiple indicator types may be enabled or disabled by passing the 5311 * logical OR of the desired types. If multiple types are specified, they 5312 * will all be set to the same enabled state. 5313 * <p> 5314 * For example, to enable the top scroll indicatorExample: {@code setScrollIndicators 5315 * 5316 * @param indicators the indicator direction, or the logical OR of multiple 5317 * indicator directions. One or more of: 5318 * <ul> 5319 * <li>{@link #SCROLL_INDICATOR_TOP}</li> 5320 * <li>{@link #SCROLL_INDICATOR_BOTTOM}</li> 5321 * <li>{@link #SCROLL_INDICATOR_LEFT}</li> 5322 * <li>{@link #SCROLL_INDICATOR_RIGHT}</li> 5323 * <li>{@link #SCROLL_INDICATOR_START}</li> 5324 * <li>{@link #SCROLL_INDICATOR_END}</li> 5325 * </ul> 5326 * @see #setScrollIndicators(int) 5327 * @see #getScrollIndicators() 5328 * @attr ref android.R.styleable#View_scrollIndicators 5329 */ 5330 public void setScrollIndicators(@ScrollIndicators int indicators, @ScrollIndicators int mask) { 5331 // Shift and sanitize mask. 5332 mask <<= SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 5333 mask &= SCROLL_INDICATORS_PFLAG3_MASK; 5334 5335 // Shift and mask indicators. 5336 indicators <<= SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 5337 indicators &= mask; 5338 5339 // Merge with non-masked flags. 5340 final int updatedFlags = indicators | (mPrivateFlags3 & ~mask); 5341 5342 if (mPrivateFlags3 != updatedFlags) { 5343 mPrivateFlags3 = updatedFlags; 5344 5345 if (indicators != 0) { 5346 initializeScrollIndicatorsInternal(); 5347 } 5348 invalidate(); 5349 } 5350 } 5351 5352 /** 5353 * Returns a bitmask representing the enabled scroll indicators. 5354 * <p> 5355 * For example, if the top and left scroll indicators are enabled and all 5356 * other indicators are disabled, the return value will be 5357 * {@code View.SCROLL_INDICATOR_TOP | View.SCROLL_INDICATOR_LEFT}. 5358 * <p> 5359 * To check whether the bottom scroll indicator is enabled, use the value 5360 * of {@code (getScrollIndicators() & View.SCROLL_INDICATOR_BOTTOM) != 0}. 5361 * 5362 * @return a bitmask representing the enabled scroll indicators 5363 */ 5364 @ScrollIndicators 5365 public int getScrollIndicators() { 5366 return (mPrivateFlags3 & SCROLL_INDICATORS_PFLAG3_MASK) 5367 >>> SCROLL_INDICATORS_TO_PFLAGS3_LSHIFT; 5368 } 5369 5370 ListenerInfo getListenerInfo() { 5371 if (mListenerInfo != null) { 5372 return mListenerInfo; 5373 } 5374 mListenerInfo = new ListenerInfo(); 5375 return mListenerInfo; 5376 } 5377 5378 /** 5379 * Register a callback to be invoked when the scroll X or Y positions of 5380 * this view change. 5381 * <p> 5382 * <b>Note:</b> Some views handle scrolling independently from View and may 5383 * have their own separate listeners for scroll-type events. For example, 5384 * {@link android.widget.ListView ListView} allows clients to register an 5385 * {@link android.widget.ListView#setOnScrollListener(android.widget.AbsListView.OnScrollListener) AbsListView.OnScrollListener} 5386 * to listen for changes in list scroll position. 5387 * 5388 * @param l The listener to notify when the scroll X or Y position changes. 5389 * @see android.view.View#getScrollX() 5390 * @see android.view.View#getScrollY() 5391 */ 5392 public void setOnScrollChangeListener(OnScrollChangeListener l) { 5393 getListenerInfo().mOnScrollChangeListener = l; 5394 } 5395 5396 /** 5397 * Register a callback to be invoked when focus of this view changed. 5398 * 5399 * @param l The callback that will run. 5400 */ 5401 public void setOnFocusChangeListener(OnFocusChangeListener l) { 5402 getListenerInfo().mOnFocusChangeListener = l; 5403 } 5404 5405 /** 5406 * Add a listener that will be called when the bounds of the view change due to 5407 * layout processing. 5408 * 5409 * @param listener The listener that will be called when layout bounds change. 5410 */ 5411 public void addOnLayoutChangeListener(OnLayoutChangeListener listener) { 5412 ListenerInfo li = getListenerInfo(); 5413 if (li.mOnLayoutChangeListeners == null) { 5414 li.mOnLayoutChangeListeners = new ArrayList<OnLayoutChangeListener>(); 5415 } 5416 if (!li.mOnLayoutChangeListeners.contains(listener)) { 5417 li.mOnLayoutChangeListeners.add(listener); 5418 } 5419 } 5420 5421 /** 5422 * Remove a listener for layout changes. 5423 * 5424 * @param listener The listener for layout bounds change. 5425 */ 5426 public void removeOnLayoutChangeListener(OnLayoutChangeListener listener) { 5427 ListenerInfo li = mListenerInfo; 5428 if (li == null || li.mOnLayoutChangeListeners == null) { 5429 return; 5430 } 5431 li.mOnLayoutChangeListeners.remove(listener); 5432 } 5433 5434 /** 5435 * Add a listener for attach state changes. 5436 * 5437 * This listener will be called whenever this view is attached or detached 5438 * from a window. Remove the listener using 5439 * {@link #removeOnAttachStateChangeListener(OnAttachStateChangeListener)}. 5440 * 5441 * @param listener Listener to attach 5442 * @see #removeOnAttachStateChangeListener(OnAttachStateChangeListener) 5443 */ 5444 public void addOnAttachStateChangeListener(OnAttachStateChangeListener listener) { 5445 ListenerInfo li = getListenerInfo(); 5446 if (li.mOnAttachStateChangeListeners == null) { 5447 li.mOnAttachStateChangeListeners 5448 = new CopyOnWriteArrayList<OnAttachStateChangeListener>(); 5449 } 5450 li.mOnAttachStateChangeListeners.add(listener); 5451 } 5452 5453 /** 5454 * Remove a listener for attach state changes. The listener will receive no further 5455 * notification of window attach/detach events. 5456 * 5457 * @param listener Listener to remove 5458 * @see #addOnAttachStateChangeListener(OnAttachStateChangeListener) 5459 */ 5460 public void removeOnAttachStateChangeListener(OnAttachStateChangeListener listener) { 5461 ListenerInfo li = mListenerInfo; 5462 if (li == null || li.mOnAttachStateChangeListeners == null) { 5463 return; 5464 } 5465 li.mOnAttachStateChangeListeners.remove(listener); 5466 } 5467 5468 /** 5469 * Returns the focus-change callback registered for this view. 5470 * 5471 * @return The callback, or null if one is not registered. 5472 */ 5473 public OnFocusChangeListener getOnFocusChangeListener() { 5474 ListenerInfo li = mListenerInfo; 5475 return li != null ? li.mOnFocusChangeListener : null; 5476 } 5477 5478 /** 5479 * Register a callback to be invoked when this view is clicked. If this view is not 5480 * clickable, it becomes clickable. 5481 * 5482 * @param l The callback that will run 5483 * 5484 * @see #setClickable(boolean) 5485 */ 5486 public void setOnClickListener(@Nullable OnClickListener l) { 5487 if (!isClickable()) { 5488 setClickable(true); 5489 } 5490 getListenerInfo().mOnClickListener = l; 5491 } 5492 5493 /** 5494 * Return whether this view has an attached OnClickListener. Returns 5495 * true if there is a listener, false if there is none. 5496 */ 5497 public boolean hasOnClickListeners() { 5498 ListenerInfo li = mListenerInfo; 5499 return (li != null && li.mOnClickListener != null); 5500 } 5501 5502 /** 5503 * Register a callback to be invoked when this view is clicked and held. If this view is not 5504 * long clickable, it becomes long clickable. 5505 * 5506 * @param l The callback that will run 5507 * 5508 * @see #setLongClickable(boolean) 5509 */ 5510 public void setOnLongClickListener(@Nullable OnLongClickListener l) { 5511 if (!isLongClickable()) { 5512 setLongClickable(true); 5513 } 5514 getListenerInfo().mOnLongClickListener = l; 5515 } 5516 5517 /** 5518 * Register a callback to be invoked when this view is context clicked. If the view is not 5519 * context clickable, it becomes context clickable. 5520 * 5521 * @param l The callback that will run 5522 * @see #setContextClickable(boolean) 5523 */ 5524 public void setOnContextClickListener(@Nullable OnContextClickListener l) { 5525 if (!isContextClickable()) { 5526 setContextClickable(true); 5527 } 5528 getListenerInfo().mOnContextClickListener = l; 5529 } 5530 5531 /** 5532 * Register a callback to be invoked when the context menu for this view is 5533 * being built. If this view is not long clickable, it becomes long clickable. 5534 * 5535 * @param l The callback that will run 5536 * 5537 */ 5538 public void setOnCreateContextMenuListener(OnCreateContextMenuListener l) { 5539 if (!isLongClickable()) { 5540 setLongClickable(true); 5541 } 5542 getListenerInfo().mOnCreateContextMenuListener = l; 5543 } 5544 5545 /** 5546 * Set an observer to collect stats for each frame rendered for this view. 5547 * 5548 * @hide 5549 */ 5550 public void addFrameMetricsListener(Window window, 5551 Window.OnFrameMetricsAvailableListener listener, 5552 Handler handler) { 5553 if (mAttachInfo != null) { 5554 if (mAttachInfo.mHardwareRenderer != null) { 5555 if (mFrameMetricsObservers == null) { 5556 mFrameMetricsObservers = new ArrayList<>(); 5557 } 5558 5559 FrameMetricsObserver fmo = new FrameMetricsObserver(window, 5560 handler.getLooper(), listener); 5561 mFrameMetricsObservers.add(fmo); 5562 mAttachInfo.mHardwareRenderer.addFrameMetricsObserver(fmo); 5563 } else { 5564 Log.w(VIEW_LOG_TAG, "View not hardware-accelerated. Unable to observe frame stats"); 5565 } 5566 } else { 5567 if (mFrameMetricsObservers == null) { 5568 mFrameMetricsObservers = new ArrayList<>(); 5569 } 5570 5571 FrameMetricsObserver fmo = new FrameMetricsObserver(window, 5572 handler.getLooper(), listener); 5573 mFrameMetricsObservers.add(fmo); 5574 } 5575 } 5576 5577 /** 5578 * Remove observer configured to collect frame stats for this view. 5579 * 5580 * @hide 5581 */ 5582 public void removeFrameMetricsListener( 5583 Window.OnFrameMetricsAvailableListener listener) { 5584 ThreadedRenderer renderer = getHardwareRenderer(); 5585 FrameMetricsObserver fmo = findFrameMetricsObserver(listener); 5586 if (fmo == null) { 5587 throw new IllegalArgumentException( 5588 "attempt to remove OnFrameMetricsAvailableListener that was never added"); 5589 } 5590 5591 if (mFrameMetricsObservers != null) { 5592 mFrameMetricsObservers.remove(fmo); 5593 if (renderer != null) { 5594 renderer.removeFrameMetricsObserver(fmo); 5595 } 5596 } 5597 } 5598 5599 private void registerPendingFrameMetricsObservers() { 5600 if (mFrameMetricsObservers != null) { 5601 ThreadedRenderer renderer = getHardwareRenderer(); 5602 if (renderer != null) { 5603 for (FrameMetricsObserver fmo : mFrameMetricsObservers) { 5604 renderer.addFrameMetricsObserver(fmo); 5605 } 5606 } else { 5607 Log.w(VIEW_LOG_TAG, "View not hardware-accelerated. Unable to observe frame stats"); 5608 } 5609 } 5610 } 5611 5612 private FrameMetricsObserver findFrameMetricsObserver( 5613 Window.OnFrameMetricsAvailableListener listener) { 5614 for (int i = 0; i < mFrameMetricsObservers.size(); i++) { 5615 FrameMetricsObserver observer = mFrameMetricsObservers.get(i); 5616 if (observer.mListener == listener) { 5617 return observer; 5618 } 5619 } 5620 5621 return null; 5622 } 5623 5624 /** 5625 * Call this view's OnClickListener, if it is defined. Performs all normal 5626 * actions associated with clicking: reporting accessibility event, playing 5627 * a sound, etc. 5628 * 5629 * @return True there was an assigned OnClickListener that was called, false 5630 * otherwise is returned. 5631 */ 5632 public boolean performClick() { 5633 final boolean result; 5634 final ListenerInfo li = mListenerInfo; 5635 if (li != null && li.mOnClickListener != null) { 5636 playSoundEffect(SoundEffectConstants.CLICK); 5637 li.mOnClickListener.onClick(this); 5638 result = true; 5639 } else { 5640 result = false; 5641 } 5642 5643 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); 5644 return result; 5645 } 5646 5647 /** 5648 * Directly call any attached OnClickListener. Unlike {@link #performClick()}, 5649 * this only calls the listener, and does not do any associated clicking 5650 * actions like reporting an accessibility event. 5651 * 5652 * @return True there was an assigned OnClickListener that was called, false 5653 * otherwise is returned. 5654 */ 5655 public boolean callOnClick() { 5656 ListenerInfo li = mListenerInfo; 5657 if (li != null && li.mOnClickListener != null) { 5658 li.mOnClickListener.onClick(this); 5659 return true; 5660 } 5661 return false; 5662 } 5663 5664 /** 5665 * Calls this view's OnLongClickListener, if it is defined. Invokes the 5666 * context menu if the OnLongClickListener did not consume the event. 5667 * 5668 * @return {@code true} if one of the above receivers consumed the event, 5669 * {@code false} otherwise 5670 */ 5671 public boolean performLongClick() { 5672 return performLongClickInternal(mLongClickX, mLongClickY); 5673 } 5674 5675 /** 5676 * Calls this view's OnLongClickListener, if it is defined. Invokes the 5677 * context menu if the OnLongClickListener did not consume the event, 5678 * anchoring it to an (x,y) coordinate. 5679 * 5680 * @param x x coordinate of the anchoring touch event, or {@link Float#NaN} 5681 * to disable anchoring 5682 * @param y y coordinate of the anchoring touch event, or {@link Float#NaN} 5683 * to disable anchoring 5684 * @return {@code true} if one of the above receivers consumed the event, 5685 * {@code false} otherwise 5686 */ 5687 public boolean performLongClick(float x, float y) { 5688 mLongClickX = x; 5689 mLongClickY = y; 5690 final boolean handled = performLongClick(); 5691 mLongClickX = Float.NaN; 5692 mLongClickY = Float.NaN; 5693 return handled; 5694 } 5695 5696 /** 5697 * Calls this view's OnLongClickListener, if it is defined. Invokes the 5698 * context menu if the OnLongClickListener did not consume the event, 5699 * optionally anchoring it to an (x,y) coordinate. 5700 * 5701 * @param x x coordinate of the anchoring touch event, or {@link Float#NaN} 5702 * to disable anchoring 5703 * @param y y coordinate of the anchoring touch event, or {@link Float#NaN} 5704 * to disable anchoring 5705 * @return {@code true} if one of the above receivers consumed the event, 5706 * {@code false} otherwise 5707 */ 5708 private boolean performLongClickInternal(float x, float y) { 5709 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED); 5710 5711 boolean handled = false; 5712 final ListenerInfo li = mListenerInfo; 5713 if (li != null && li.mOnLongClickListener != null) { 5714 handled = li.mOnLongClickListener.onLongClick(View.this); 5715 } 5716 if (!handled) { 5717 final boolean isAnchored = !Float.isNaN(x) && !Float.isNaN(y); 5718 handled = isAnchored ? showContextMenu(x, y) : showContextMenu(); 5719 } 5720 if (handled) { 5721 performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); 5722 } 5723 return handled; 5724 } 5725 5726 /** 5727 * Call this view's OnContextClickListener, if it is defined. 5728 * 5729 * @param x the x coordinate of the context click 5730 * @param y the y coordinate of the context click 5731 * @return True if there was an assigned OnContextClickListener that consumed the event, false 5732 * otherwise. 5733 */ 5734 public boolean performContextClick(float x, float y) { 5735 return performContextClick(); 5736 } 5737 5738 /** 5739 * Call this view's OnContextClickListener, if it is defined. 5740 * 5741 * @return True if there was an assigned OnContextClickListener that consumed the event, false 5742 * otherwise. 5743 */ 5744 public boolean performContextClick() { 5745 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CONTEXT_CLICKED); 5746 5747 boolean handled = false; 5748 ListenerInfo li = mListenerInfo; 5749 if (li != null && li.mOnContextClickListener != null) { 5750 handled = li.mOnContextClickListener.onContextClick(View.this); 5751 } 5752 if (handled) { 5753 performHapticFeedback(HapticFeedbackConstants.CONTEXT_CLICK); 5754 } 5755 return handled; 5756 } 5757 5758 /** 5759 * Performs button-related actions during a touch down event. 5760 * 5761 * @param event The event. 5762 * @return True if the down was consumed. 5763 * 5764 * @hide 5765 */ 5766 protected boolean performButtonActionOnTouchDown(MotionEvent event) { 5767 if (event.isFromSource(InputDevice.SOURCE_MOUSE) && 5768 (event.getButtonState() & MotionEvent.BUTTON_SECONDARY) != 0) { 5769 showContextMenu(event.getX(), event.getY()); 5770 mPrivateFlags |= PFLAG_CANCEL_NEXT_UP_EVENT; 5771 return true; 5772 } 5773 return false; 5774 } 5775 5776 /** 5777 * Shows the context menu for this view. 5778 * 5779 * @return {@code true} if the context menu was shown, {@code false} 5780 * otherwise 5781 * @see #showContextMenu(float, float) 5782 */ 5783 public boolean showContextMenu() { 5784 return getParent().showContextMenuForChild(this); 5785 } 5786 5787 /** 5788 * Shows the context menu for this view anchored to the specified 5789 * view-relative coordinate. 5790 * 5791 * @param x the X coordinate in pixels relative to the view to which the 5792 * menu should be anchored, or {@link Float#NaN} to disable anchoring 5793 * @param y the Y coordinate in pixels relative to the view to which the 5794 * menu should be anchored, or {@link Float#NaN} to disable anchoring 5795 * @return {@code true} if the context menu was shown, {@code false} 5796 * otherwise 5797 */ 5798 public boolean showContextMenu(float x, float y) { 5799 return getParent().showContextMenuForChild(this, x, y); 5800 } 5801 5802 /** 5803 * Start an action mode with the default type {@link ActionMode#TYPE_PRIMARY}. 5804 * 5805 * @param callback Callback that will control the lifecycle of the action mode 5806 * @return The new action mode if it is started, null otherwise 5807 * 5808 * @see ActionMode 5809 * @see #startActionMode(android.view.ActionMode.Callback, int) 5810 */ 5811 public ActionMode startActionMode(ActionMode.Callback callback) { 5812 return startActionMode(callback, ActionMode.TYPE_PRIMARY); 5813 } 5814 5815 /** 5816 * Start an action mode with the given type. 5817 * 5818 * @param callback Callback that will control the lifecycle of the action mode 5819 * @param type One of {@link ActionMode#TYPE_PRIMARY} or {@link ActionMode#TYPE_FLOATING}. 5820 * @return The new action mode if it is started, null otherwise 5821 * 5822 * @see ActionMode 5823 */ 5824 public ActionMode startActionMode(ActionMode.Callback callback, int type) { 5825 ViewParent parent = getParent(); 5826 if (parent == null) return null; 5827 try { 5828 return parent.startActionModeForChild(this, callback, type); 5829 } catch (AbstractMethodError ame) { 5830 // Older implementations of custom views might not implement this. 5831 return parent.startActionModeForChild(this, callback); 5832 } 5833 } 5834 5835 /** 5836 * Call {@link Context#startActivityForResult(String, Intent, int, Bundle)} for the View's 5837 * Context, creating a unique View identifier to retrieve the result. 5838 * 5839 * @param intent The Intent to be started. 5840 * @param requestCode The request code to use. 5841 * @hide 5842 */ 5843 public void startActivityForResult(Intent intent, int requestCode) { 5844 mStartActivityRequestWho = "@android:view:" + System.identityHashCode(this); 5845 getContext().startActivityForResult(mStartActivityRequestWho, intent, requestCode, null); 5846 } 5847 5848 /** 5849 * If this View corresponds to the calling who, dispatches the activity result. 5850 * @param who The identifier for the targeted View to receive the result. 5851 * @param requestCode The integer request code originally supplied to 5852 * startActivityForResult(), allowing you to identify who this 5853 * result came from. 5854 * @param resultCode The integer result code returned by the child activity 5855 * through its setResult(). 5856 * @param data An Intent, which can return result data to the caller 5857 * (various data can be attached to Intent "extras"). 5858 * @return {@code true} if the activity result was dispatched. 5859 * @hide 5860 */ 5861 public boolean dispatchActivityResult( 5862 String who, int requestCode, int resultCode, Intent data) { 5863 if (mStartActivityRequestWho != null && mStartActivityRequestWho.equals(who)) { 5864 onActivityResult(requestCode, resultCode, data); 5865 mStartActivityRequestWho = null; 5866 return true; 5867 } 5868 return false; 5869 } 5870 5871 /** 5872 * Receive the result from a previous call to {@link #startActivityForResult(Intent, int)}. 5873 * 5874 * @param requestCode The integer request code originally supplied to 5875 * startActivityForResult(), allowing you to identify who this 5876 * result came from. 5877 * @param resultCode The integer result code returned by the child activity 5878 * through its setResult(). 5879 * @param data An Intent, which can return result data to the caller 5880 * (various data can be attached to Intent "extras"). 5881 * @hide 5882 */ 5883 public void onActivityResult(int requestCode, int resultCode, Intent data) { 5884 // Do nothing. 5885 } 5886 5887 /** 5888 * Register a callback to be invoked when a hardware key is pressed in this view. 5889 * Key presses in software input methods will generally not trigger the methods of 5890 * this listener. 5891 * @param l the key listener to attach to this view 5892 */ 5893 public void setOnKeyListener(OnKeyListener l) { 5894 getListenerInfo().mOnKeyListener = l; 5895 } 5896 5897 /** 5898 * Register a callback to be invoked when a touch event is sent to this view. 5899 * @param l the touch listener to attach to this view 5900 */ 5901 public void setOnTouchListener(OnTouchListener l) { 5902 getListenerInfo().mOnTouchListener = l; 5903 } 5904 5905 /** 5906 * Register a callback to be invoked when a generic motion event is sent to this view. 5907 * @param l the generic motion listener to attach to this view 5908 */ 5909 public void setOnGenericMotionListener(OnGenericMotionListener l) { 5910 getListenerInfo().mOnGenericMotionListener = l; 5911 } 5912 5913 /** 5914 * Register a callback to be invoked when a hover event is sent to this view. 5915 * @param l the hover listener to attach to this view 5916 */ 5917 public void setOnHoverListener(OnHoverListener l) { 5918 getListenerInfo().mOnHoverListener = l; 5919 } 5920 5921 /** 5922 * Register a drag event listener callback object for this View. The parameter is 5923 * an implementation of {@link android.view.View.OnDragListener}. To send a drag event to a 5924 * View, the system calls the 5925 * {@link android.view.View.OnDragListener#onDrag(View,DragEvent)} method. 5926 * @param l An implementation of {@link android.view.View.OnDragListener}. 5927 */ 5928 public void setOnDragListener(OnDragListener l) { 5929 getListenerInfo().mOnDragListener = l; 5930 } 5931 5932 /** 5933 * Give this view focus. This will cause 5934 * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} to be called. 5935 * 5936 * Note: this does not check whether this {@link View} should get focus, it just 5937 * gives it focus no matter what. It should only be called internally by framework 5938 * code that knows what it is doing, namely {@link #requestFocus(int, Rect)}. 5939 * 5940 * @param direction values are {@link View#FOCUS_UP}, {@link View#FOCUS_DOWN}, 5941 * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT}. This is the direction which 5942 * focus moved when requestFocus() is called. It may not always 5943 * apply, in which case use the default View.FOCUS_DOWN. 5944 * @param previouslyFocusedRect The rectangle of the view that had focus 5945 * prior in this View's coordinate system. 5946 */ 5947 void handleFocusGainInternal(@FocusRealDirection int direction, Rect previouslyFocusedRect) { 5948 if (DBG) { 5949 System.out.println(this + " requestFocus()"); 5950 } 5951 5952 if ((mPrivateFlags & PFLAG_FOCUSED) == 0) { 5953 mPrivateFlags |= PFLAG_FOCUSED; 5954 5955 View oldFocus = (mAttachInfo != null) ? getRootView().findFocus() : null; 5956 5957 if (mParent != null) { 5958 mParent.requestChildFocus(this, this); 5959 } 5960 5961 if (mAttachInfo != null) { 5962 mAttachInfo.mTreeObserver.dispatchOnGlobalFocusChange(oldFocus, this); 5963 } 5964 5965 onFocusChanged(true, direction, previouslyFocusedRect); 5966 refreshDrawableState(); 5967 } 5968 } 5969 5970 /** 5971 * Sets this view's preference for reveal behavior when it gains focus. 5972 * 5973 * <p>When set to true, this is a signal to ancestor views in the hierarchy that 5974 * this view would prefer to be brought fully into view when it gains focus. 5975 * For example, a text field that a user is meant to type into. Other views such 5976 * as scrolling containers may prefer to opt-out of this behavior.</p> 5977 * 5978 * <p>The default value for views is true, though subclasses may change this 5979 * based on their preferred behavior.</p> 5980 * 5981 * @param revealOnFocus true to request reveal on focus in ancestors, false otherwise 5982 * 5983 * @see #getRevealOnFocusHint() 5984 */ 5985 public final void setRevealOnFocusHint(boolean revealOnFocus) { 5986 if (revealOnFocus) { 5987 mPrivateFlags3 &= ~PFLAG3_NO_REVEAL_ON_FOCUS; 5988 } else { 5989 mPrivateFlags3 |= PFLAG3_NO_REVEAL_ON_FOCUS; 5990 } 5991 } 5992 5993 /** 5994 * Returns this view's preference for reveal behavior when it gains focus. 5995 * 5996 * <p>When this method returns true for a child view requesting focus, ancestor 5997 * views responding to a focus change in {@link ViewParent#requestChildFocus(View, View)} 5998 * should make a best effort to make the newly focused child fully visible to the user. 5999 * When it returns false, ancestor views should preferably not disrupt scroll positioning or 6000 * other properties affecting visibility to the user as part of the focus change.</p> 6001 * 6002 * @return true if this view would prefer to become fully visible when it gains focus, 6003 * false if it would prefer not to disrupt scroll positioning 6004 * 6005 * @see #setRevealOnFocusHint(boolean) 6006 */ 6007 public final boolean getRevealOnFocusHint() { 6008 return (mPrivateFlags3 & PFLAG3_NO_REVEAL_ON_FOCUS) == 0; 6009 } 6010 6011 /** 6012 * Populates <code>outRect</code> with the hotspot bounds. By default, 6013 * the hotspot bounds are identical to the screen bounds. 6014 * 6015 * @param outRect rect to populate with hotspot bounds 6016 * @hide Only for internal use by views and widgets. 6017 */ 6018 public void getHotspotBounds(Rect outRect) { 6019 final Drawable background = getBackground(); 6020 if (background != null) { 6021 background.getHotspotBounds(outRect); 6022 } else { 6023 getBoundsOnScreen(outRect); 6024 } 6025 } 6026 6027 /** 6028 * Request that a rectangle of this view be visible on the screen, 6029 * scrolling if necessary just enough. 6030 * 6031 * <p>A View should call this if it maintains some notion of which part 6032 * of its content is interesting. For example, a text editing view 6033 * should call this when its cursor moves. 6034 * <p>The Rectangle passed into this method should be in the View's content coordinate space. 6035 * It should not be affected by which part of the View is currently visible or its scroll 6036 * position. 6037 * 6038 * @param rectangle The rectangle in the View's content coordinate space 6039 * @return Whether any parent scrolled. 6040 */ 6041 public boolean requestRectangleOnScreen(Rect rectangle) { 6042 return requestRectangleOnScreen(rectangle, false); 6043 } 6044 6045 /** 6046 * Request that a rectangle of this view be visible on the screen, 6047 * scrolling if necessary just enough. 6048 * 6049 * <p>A View should call this if it maintains some notion of which part 6050 * of its content is interesting. For example, a text editing view 6051 * should call this when its cursor moves. 6052 * <p>The Rectangle passed into this method should be in the View's content coordinate space. 6053 * It should not be affected by which part of the View is currently visible or its scroll 6054 * position. 6055 * <p>When <code>immediate</code> is set to true, scrolling will not be 6056 * animated. 6057 * 6058 * @param rectangle The rectangle in the View's content coordinate space 6059 * @param immediate True to forbid animated scrolling, false otherwise 6060 * @return Whether any parent scrolled. 6061 */ 6062 public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { 6063 if (mParent == null) { 6064 return false; 6065 } 6066 6067 View child = this; 6068 6069 RectF position = (mAttachInfo != null) ? mAttachInfo.mTmpTransformRect : new RectF(); 6070 position.set(rectangle); 6071 6072 ViewParent parent = mParent; 6073 boolean scrolled = false; 6074 while (parent != null) { 6075 rectangle.set((int) position.left, (int) position.top, 6076 (int) position.right, (int) position.bottom); 6077 6078 scrolled |= parent.requestChildRectangleOnScreen(child, rectangle, immediate); 6079 6080 if (!(parent instanceof View)) { 6081 break; 6082 } 6083 6084 // move it from child's content coordinate space to parent's content coordinate space 6085 position.offset(child.mLeft - child.getScrollX(), child.mTop -child.getScrollY()); 6086 6087 child = (View) parent; 6088 parent = child.getParent(); 6089 } 6090 6091 return scrolled; 6092 } 6093 6094 /** 6095 * Called when this view wants to give up focus. If focus is cleared 6096 * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} is called. 6097 * <p> 6098 * <strong>Note:</strong> When a View clears focus the framework is trying 6099 * to give focus to the first focusable View from the top. Hence, if this 6100 * View is the first from the top that can take focus, then all callbacks 6101 * related to clearing focus will be invoked after which the framework will 6102 * give focus to this view. 6103 * </p> 6104 */ 6105 public void clearFocus() { 6106 if (DBG) { 6107 System.out.println(this + " clearFocus()"); 6108 } 6109 6110 clearFocusInternal(null, true, true); 6111 } 6112 6113 /** 6114 * Clears focus from the view, optionally propagating the change up through 6115 * the parent hierarchy and requesting that the root view place new focus. 6116 * 6117 * @param propagate whether to propagate the change up through the parent 6118 * hierarchy 6119 * @param refocus when propagate is true, specifies whether to request the 6120 * root view place new focus 6121 */ 6122 void clearFocusInternal(View focused, boolean propagate, boolean refocus) { 6123 if ((mPrivateFlags & PFLAG_FOCUSED) != 0) { 6124 mPrivateFlags &= ~PFLAG_FOCUSED; 6125 6126 if (propagate && mParent != null) { 6127 mParent.clearChildFocus(this); 6128 } 6129 6130 onFocusChanged(false, 0, null); 6131 refreshDrawableState(); 6132 6133 if (propagate && (!refocus || !rootViewRequestFocus())) { 6134 notifyGlobalFocusCleared(this); 6135 } 6136 } 6137 } 6138 6139 void notifyGlobalFocusCleared(View oldFocus) { 6140 if (oldFocus != null && mAttachInfo != null) { 6141 mAttachInfo.mTreeObserver.dispatchOnGlobalFocusChange(oldFocus, null); 6142 } 6143 } 6144 6145 boolean rootViewRequestFocus() { 6146 final View root = getRootView(); 6147 return root != null && root.requestFocus(); 6148 } 6149 6150 /** 6151 * Called internally by the view system when a new view is getting focus. 6152 * This is what clears the old focus. 6153 * <p> 6154 * <b>NOTE:</b> The parent view's focused child must be updated manually 6155 * after calling this method. Otherwise, the view hierarchy may be left in 6156 * an inconstent state. 6157 */ 6158 void unFocus(View focused) { 6159 if (DBG) { 6160 System.out.println(this + " unFocus()"); 6161 } 6162 6163 clearFocusInternal(focused, false, false); 6164 } 6165 6166 /** 6167 * Returns true if this view has focus itself, or is the ancestor of the 6168 * view that has focus. 6169 * 6170 * @return True if this view has or contains focus, false otherwise. 6171 */ 6172 @ViewDebug.ExportedProperty(category = "focus") 6173 public boolean hasFocus() { 6174 return (mPrivateFlags & PFLAG_FOCUSED) != 0; 6175 } 6176 6177 /** 6178 * Returns true if this view is focusable or if it contains a reachable View 6179 * for which {@link #hasFocusable()} returns true. A "reachable hasFocusable()" 6180 * is a View whose parents do not block descendants focus. 6181 * 6182 * Only {@link #VISIBLE} views are considered focusable. 6183 * 6184 * @return True if the view is focusable or if the view contains a focusable 6185 * View, false otherwise. 6186 * 6187 * @see ViewGroup#FOCUS_BLOCK_DESCENDANTS 6188 * @see ViewGroup#getTouchscreenBlocksFocus() 6189 */ 6190 public boolean hasFocusable() { 6191 if (!isFocusableInTouchMode()) { 6192 for (ViewParent p = mParent; p instanceof ViewGroup; p = p.getParent()) { 6193 final ViewGroup g = (ViewGroup) p; 6194 if (g.shouldBlockFocusForTouchscreen()) { 6195 return false; 6196 } 6197 } 6198 } 6199 return (mViewFlags & VISIBILITY_MASK) == VISIBLE && isFocusable(); 6200 } 6201 6202 /** 6203 * Called by the view system when the focus state of this view changes. 6204 * When the focus change event is caused by directional navigation, direction 6205 * and previouslyFocusedRect provide insight into where the focus is coming from. 6206 * When overriding, be sure to call up through to the super class so that 6207 * the standard focus handling will occur. 6208 * 6209 * @param gainFocus True if the View has focus; false otherwise. 6210 * @param direction The direction focus has moved when requestFocus() 6211 * is called to give this view focus. Values are 6212 * {@link #FOCUS_UP}, {@link #FOCUS_DOWN}, {@link #FOCUS_LEFT}, 6213 * {@link #FOCUS_RIGHT}, {@link #FOCUS_FORWARD}, or {@link #FOCUS_BACKWARD}. 6214 * It may not always apply, in which case use the default. 6215 * @param previouslyFocusedRect The rectangle, in this view's coordinate 6216 * system, of the previously focused view. If applicable, this will be 6217 * passed in as finer grained information about where the focus is coming 6218 * from (in addition to direction). Will be <code>null</code> otherwise. 6219 */ 6220 @CallSuper 6221 protected void onFocusChanged(boolean gainFocus, @FocusDirection int direction, 6222 @Nullable Rect previouslyFocusedRect) { 6223 if (gainFocus) { 6224 sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED); 6225 } else { 6226 notifyViewAccessibilityStateChangedIfNeeded( 6227 AccessibilityEvent.CONTENT_CHANGE_TYPE_UNDEFINED); 6228 } 6229 6230 InputMethodManager imm = InputMethodManager.peekInstance(); 6231 if (!gainFocus) { 6232 if (isPressed()) { 6233 setPressed(false); 6234 } 6235 if (imm != null && mAttachInfo != null 6236 && mAttachInfo.mHasWindowFocus) { 6237 imm.focusOut(this); 6238 } 6239 onFocusLost(); 6240 } else if (imm != null && mAttachInfo != null 6241 && mAttachInfo.mHasWindowFocus) { 6242 imm.focusIn(this); 6243 } 6244 6245 invalidate(true); 6246 ListenerInfo li = mListenerInfo; 6247 if (li != null && li.mOnFocusChangeListener != null) { 6248 li.mOnFocusChangeListener.onFocusChange(this, gainFocus); 6249 } 6250 6251 if (mAttachInfo != null) { 6252 mAttachInfo.mKeyDispatchState.reset(this); 6253 } 6254 } 6255 6256 /** 6257 * Sends an accessibility event of the given type. If accessibility is 6258 * not enabled this method has no effect. The default implementation calls 6259 * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)} first 6260 * to populate information about the event source (this View), then calls 6261 * {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} to 6262 * populate the text content of the event source including its descendants, 6263 * and last calls 6264 * {@link ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent)} 6265 * on its parent to request sending of the event to interested parties. 6266 * <p> 6267 * If an {@link AccessibilityDelegate} has been specified via calling 6268 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 6269 * {@link AccessibilityDelegate#sendAccessibilityEvent(View, int)} is 6270 * responsible for handling this call. 6271 * </p> 6272 * 6273 * @param eventType The type of the event to send, as defined by several types from 6274 * {@link android.view.accessibility.AccessibilityEvent}, such as 6275 * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_CLICKED} or 6276 * {@link android.view.accessibility.AccessibilityEvent#TYPE_VIEW_HOVER_ENTER}. 6277 * 6278 * @see #onInitializeAccessibilityEvent(AccessibilityEvent) 6279 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 6280 * @see ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent) 6281 * @see AccessibilityDelegate 6282 */ 6283 public void sendAccessibilityEvent(int eventType) { 6284 if (mAccessibilityDelegate != null) { 6285 mAccessibilityDelegate.sendAccessibilityEvent(this, eventType); 6286 } else { 6287 sendAccessibilityEventInternal(eventType); 6288 } 6289 } 6290 6291 /** 6292 * Convenience method for sending a {@link AccessibilityEvent#TYPE_ANNOUNCEMENT} 6293 * {@link AccessibilityEvent} to make an announcement which is related to some 6294 * sort of a context change for which none of the events representing UI transitions 6295 * is a good fit. For example, announcing a new page in a book. If accessibility 6296 * is not enabled this method does nothing. 6297 * 6298 * @param text The announcement text. 6299 */ 6300 public void announceForAccessibility(CharSequence text) { 6301 if (AccessibilityManager.getInstance(mContext).isEnabled() && mParent != null) { 6302 AccessibilityEvent event = AccessibilityEvent.obtain( 6303 AccessibilityEvent.TYPE_ANNOUNCEMENT); 6304 onInitializeAccessibilityEvent(event); 6305 event.getText().add(text); 6306 event.setContentDescription(null); 6307 mParent.requestSendAccessibilityEvent(this, event); 6308 } 6309 } 6310 6311 /** 6312 * @see #sendAccessibilityEvent(int) 6313 * 6314 * Note: Called from the default {@link AccessibilityDelegate}. 6315 * 6316 * @hide 6317 */ 6318 public void sendAccessibilityEventInternal(int eventType) { 6319 if (AccessibilityManager.getInstance(mContext).isEnabled()) { 6320 sendAccessibilityEventUnchecked(AccessibilityEvent.obtain(eventType)); 6321 } 6322 } 6323 6324 /** 6325 * This method behaves exactly as {@link #sendAccessibilityEvent(int)} but 6326 * takes as an argument an empty {@link AccessibilityEvent} and does not 6327 * perform a check whether accessibility is enabled. 6328 * <p> 6329 * If an {@link AccessibilityDelegate} has been specified via calling 6330 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 6331 * {@link AccessibilityDelegate#sendAccessibilityEventUnchecked(View, AccessibilityEvent)} 6332 * is responsible for handling this call. 6333 * </p> 6334 * 6335 * @param event The event to send. 6336 * 6337 * @see #sendAccessibilityEvent(int) 6338 */ 6339 public void sendAccessibilityEventUnchecked(AccessibilityEvent event) { 6340 if (mAccessibilityDelegate != null) { 6341 mAccessibilityDelegate.sendAccessibilityEventUnchecked(this, event); 6342 } else { 6343 sendAccessibilityEventUncheckedInternal(event); 6344 } 6345 } 6346 6347 /** 6348 * @see #sendAccessibilityEventUnchecked(AccessibilityEvent) 6349 * 6350 * Note: Called from the default {@link AccessibilityDelegate}. 6351 * 6352 * @hide 6353 */ 6354 public void sendAccessibilityEventUncheckedInternal(AccessibilityEvent event) { 6355 if (!isShown()) { 6356 return; 6357 } 6358 onInitializeAccessibilityEvent(event); 6359 // Only a subset of accessibility events populates text content. 6360 if ((event.getEventType() & POPULATING_ACCESSIBILITY_EVENT_TYPES) != 0) { 6361 dispatchPopulateAccessibilityEvent(event); 6362 } 6363 // In the beginning we called #isShown(), so we know that getParent() is not null. 6364 getParent().requestSendAccessibilityEvent(this, event); 6365 } 6366 6367 /** 6368 * Dispatches an {@link AccessibilityEvent} to the {@link View} first and then 6369 * to its children for adding their text content to the event. Note that the 6370 * event text is populated in a separate dispatch path since we add to the 6371 * event not only the text of the source but also the text of all its descendants. 6372 * A typical implementation will call 6373 * {@link #onPopulateAccessibilityEvent(AccessibilityEvent)} on the this view 6374 * and then call the {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} 6375 * on each child. Override this method if custom population of the event text 6376 * content is required. 6377 * <p> 6378 * If an {@link AccessibilityDelegate} has been specified via calling 6379 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 6380 * {@link AccessibilityDelegate#dispatchPopulateAccessibilityEvent(View, AccessibilityEvent)} 6381 * is responsible for handling this call. 6382 * </p> 6383 * <p> 6384 * <em>Note:</em> Accessibility events of certain types are not dispatched for 6385 * populating the event text via this method. For details refer to {@link AccessibilityEvent}. 6386 * </p> 6387 * 6388 * @param event The event. 6389 * 6390 * @return True if the event population was completed. 6391 */ 6392 public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { 6393 if (mAccessibilityDelegate != null) { 6394 return mAccessibilityDelegate.dispatchPopulateAccessibilityEvent(this, event); 6395 } else { 6396 return dispatchPopulateAccessibilityEventInternal(event); 6397 } 6398 } 6399 6400 /** 6401 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 6402 * 6403 * Note: Called from the default {@link AccessibilityDelegate}. 6404 * 6405 * @hide 6406 */ 6407 public boolean dispatchPopulateAccessibilityEventInternal(AccessibilityEvent event) { 6408 onPopulateAccessibilityEvent(event); 6409 return false; 6410 } 6411 6412 /** 6413 * Called from {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} 6414 * giving a chance to this View to populate the accessibility event with its 6415 * text content. While this method is free to modify event 6416 * attributes other than text content, doing so should normally be performed in 6417 * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)}. 6418 * <p> 6419 * Example: Adding formatted date string to an accessibility event in addition 6420 * to the text added by the super implementation: 6421 * <pre> public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 6422 * super.onPopulateAccessibilityEvent(event); 6423 * final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_WEEKDAY; 6424 * String selectedDateUtterance = DateUtils.formatDateTime(mContext, 6425 * mCurrentDate.getTimeInMillis(), flags); 6426 * event.getText().add(selectedDateUtterance); 6427 * }</pre> 6428 * <p> 6429 * If an {@link AccessibilityDelegate} has been specified via calling 6430 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 6431 * {@link AccessibilityDelegate#onPopulateAccessibilityEvent(View, AccessibilityEvent)} 6432 * is responsible for handling this call. 6433 * </p> 6434 * <p class="note"><strong>Note:</strong> Always call the super implementation before adding 6435 * information to the event, in case the default implementation has basic information to add. 6436 * </p> 6437 * 6438 * @param event The accessibility event which to populate. 6439 * 6440 * @see #sendAccessibilityEvent(int) 6441 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 6442 */ 6443 @CallSuper 6444 public void onPopulateAccessibilityEvent(AccessibilityEvent event) { 6445 if (mAccessibilityDelegate != null) { 6446 mAccessibilityDelegate.onPopulateAccessibilityEvent(this, event); 6447 } else { 6448 onPopulateAccessibilityEventInternal(event); 6449 } 6450 } 6451 6452 /** 6453 * @see #onPopulateAccessibilityEvent(AccessibilityEvent) 6454 * 6455 * Note: Called from the default {@link AccessibilityDelegate}. 6456 * 6457 * @hide 6458 */ 6459 public void onPopulateAccessibilityEventInternal(AccessibilityEvent event) { 6460 } 6461 6462 /** 6463 * Initializes an {@link AccessibilityEvent} with information about 6464 * this View which is the event source. In other words, the source of 6465 * an accessibility event is the view whose state change triggered firing 6466 * the event. 6467 * <p> 6468 * Example: Setting the password property of an event in addition 6469 * to properties set by the super implementation: 6470 * <pre> public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 6471 * super.onInitializeAccessibilityEvent(event); 6472 * event.setPassword(true); 6473 * }</pre> 6474 * <p> 6475 * If an {@link AccessibilityDelegate} has been specified via calling 6476 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 6477 * {@link AccessibilityDelegate#onInitializeAccessibilityEvent(View, AccessibilityEvent)} 6478 * is responsible for handling this call. 6479 * </p> 6480 * <p class="note"><strong>Note:</strong> Always call the super implementation before adding 6481 * information to the event, in case the default implementation has basic information to add. 6482 * </p> 6483 * @param event The event to initialize. 6484 * 6485 * @see #sendAccessibilityEvent(int) 6486 * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) 6487 */ 6488 @CallSuper 6489 public void onInitializeAccessibilityEvent(AccessibilityEvent event) { 6490 if (mAccessibilityDelegate != null) { 6491 mAccessibilityDelegate.onInitializeAccessibilityEvent(this, event); 6492 } else { 6493 onInitializeAccessibilityEventInternal(event); 6494 } 6495 } 6496 6497 /** 6498 * @see #onInitializeAccessibilityEvent(AccessibilityEvent) 6499 * 6500 * Note: Called from the default {@link AccessibilityDelegate}. 6501 * 6502 * @hide 6503 */ 6504 public void onInitializeAccessibilityEventInternal(AccessibilityEvent event) { 6505 event.setSource(this); 6506 event.setClassName(getAccessibilityClassName()); 6507 event.setPackageName(getContext().getPackageName()); 6508 event.setEnabled(isEnabled()); 6509 event.setContentDescription(mContentDescription); 6510 6511 switch (event.getEventType()) { 6512 case AccessibilityEvent.TYPE_VIEW_FOCUSED: { 6513 ArrayList<View> focusablesTempList = (mAttachInfo != null) 6514 ? mAttachInfo.mTempArrayList : new ArrayList<View>(); 6515 getRootView().addFocusables(focusablesTempList, View.FOCUS_FORWARD, FOCUSABLES_ALL); 6516 event.setItemCount(focusablesTempList.size()); 6517 event.setCurrentItemIndex(focusablesTempList.indexOf(this)); 6518 if (mAttachInfo != null) { 6519 focusablesTempList.clear(); 6520 } 6521 } break; 6522 case AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED: { 6523 CharSequence text = getIterableTextForAccessibility(); 6524 if (text != null && text.length() > 0) { 6525 event.setFromIndex(getAccessibilitySelectionStart()); 6526 event.setToIndex(getAccessibilitySelectionEnd()); 6527 event.setItemCount(text.length()); 6528 } 6529 } break; 6530 } 6531 } 6532 6533 /** 6534 * Returns an {@link AccessibilityNodeInfo} representing this view from the 6535 * point of view of an {@link android.accessibilityservice.AccessibilityService}. 6536 * This method is responsible for obtaining an accessibility node info from a 6537 * pool of reusable instances and calling 6538 * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on this view to 6539 * initialize the former. 6540 * <p> 6541 * Note: The client is responsible for recycling the obtained instance by calling 6542 * {@link AccessibilityNodeInfo#recycle()} to minimize object creation. 6543 * </p> 6544 * 6545 * @return A populated {@link AccessibilityNodeInfo}. 6546 * 6547 * @see AccessibilityNodeInfo 6548 */ 6549 public AccessibilityNodeInfo createAccessibilityNodeInfo() { 6550 if (mAccessibilityDelegate != null) { 6551 return mAccessibilityDelegate.createAccessibilityNodeInfo(this); 6552 } else { 6553 return createAccessibilityNodeInfoInternal(); 6554 } 6555 } 6556 6557 /** 6558 * @see #createAccessibilityNodeInfo() 6559 * 6560 * @hide 6561 */ 6562 public AccessibilityNodeInfo createAccessibilityNodeInfoInternal() { 6563 AccessibilityNodeProvider provider = getAccessibilityNodeProvider(); 6564 if (provider != null) { 6565 return provider.createAccessibilityNodeInfo(AccessibilityNodeProvider.HOST_VIEW_ID); 6566 } else { 6567 AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(this); 6568 onInitializeAccessibilityNodeInfo(info); 6569 return info; 6570 } 6571 } 6572 6573 /** 6574 * Initializes an {@link AccessibilityNodeInfo} with information about this view. 6575 * The base implementation sets: 6576 * <ul> 6577 * <li>{@link AccessibilityNodeInfo#setParent(View)},</li> 6578 * <li>{@link AccessibilityNodeInfo#setBoundsInParent(Rect)},</li> 6579 * <li>{@link AccessibilityNodeInfo#setBoundsInScreen(Rect)},</li> 6580 * <li>{@link AccessibilityNodeInfo#setPackageName(CharSequence)},</li> 6581 * <li>{@link AccessibilityNodeInfo#setClassName(CharSequence)},</li> 6582 * <li>{@link AccessibilityNodeInfo#setContentDescription(CharSequence)},</li> 6583 * <li>{@link AccessibilityNodeInfo#setEnabled(boolean)},</li> 6584 * <li>{@link AccessibilityNodeInfo#setClickable(boolean)},</li> 6585 * <li>{@link AccessibilityNodeInfo#setFocusable(boolean)},</li> 6586 * <li>{@link AccessibilityNodeInfo#setFocused(boolean)},</li> 6587 * <li>{@link AccessibilityNodeInfo#setLongClickable(boolean)},</li> 6588 * <li>{@link AccessibilityNodeInfo#setSelected(boolean)},</li> 6589 * <li>{@link AccessibilityNodeInfo#setContextClickable(boolean)}</li> 6590 * </ul> 6591 * <p> 6592 * Subclasses should override this method, call the super implementation, 6593 * and set additional attributes. 6594 * </p> 6595 * <p> 6596 * If an {@link AccessibilityDelegate} has been specified via calling 6597 * {@link #setAccessibilityDelegate(AccessibilityDelegate)} its 6598 * {@link AccessibilityDelegate#onInitializeAccessibilityNodeInfo(View, AccessibilityNodeInfo)} 6599 * is responsible for handling this call. 6600 * </p> 6601 * 6602 * @param info The instance to initialize. 6603 */ 6604 @CallSuper 6605 public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { 6606 if (mAccessibilityDelegate != null) { 6607 mAccessibilityDelegate.onInitializeAccessibilityNodeInfo(this, info); 6608 } else { 6609 onInitializeAccessibilityNodeInfoInternal(info); 6610 } 6611 } 6612 6613 /** 6614 * Gets the location of this view in screen coordinates. 6615 * 6616 * @param outRect The output location 6617 * @hide 6618 */ 6619 public void getBoundsOnScreen(Rect outRect) { 6620 getBoundsOnScreen(outRect, false); 6621 } 6622 6623 /** 6624 * Gets the location of this view in screen coordinates. 6625 * 6626 * @param outRect The output location 6627 * @param clipToParent Whether to clip child bounds to the parent ones. 6628 * @hide 6629 */ 6630 public void getBoundsOnScreen(Rect outRect, boolean clipToParent) { 6631 if (mAttachInfo == null) { 6632 return; 6633 } 6634 6635 RectF position = mAttachInfo.mTmpTransformRect; 6636 position.set(0, 0, mRight - mLeft, mBottom - mTop); 6637 6638 if (!hasIdentityMatrix()) { 6639 getMatrix().mapRect(position); 6640 } 6641 6642 position.offset(mLeft, mTop); 6643 6644 ViewParent parent = mParent; 6645 while (parent instanceof View) { 6646 View parentView = (View) parent; 6647 6648 position.offset(-parentView.mScrollX, -parentView.mScrollY); 6649 6650 if (clipToParent) { 6651 position.left = Math.max(position.left, 0); 6652 position.top = Math.max(position.top, 0); 6653 position.right = Math.min(position.right, parentView.getWidth()); 6654 position.bottom = Math.min(position.bottom, parentView.getHeight()); 6655 } 6656 6657 if (!parentView.hasIdentityMatrix()) { 6658 parentView.getMatrix().mapRect(position); 6659 } 6660 6661 position.offset(parentView.mLeft, parentView.mTop); 6662 6663 parent = parentView.mParent; 6664 } 6665 6666 if (parent instanceof ViewRootImpl) { 6667 ViewRootImpl viewRootImpl = (ViewRootImpl) parent; 6668 position.offset(0, -viewRootImpl.mCurScrollY); 6669 } 6670 6671 position.offset(mAttachInfo.mWindowLeft, mAttachInfo.mWindowTop); 6672 6673 outRect.set(Math.round(position.left), Math.round(position.top), 6674 Math.round(position.right), Math.round(position.bottom)); 6675 } 6676 6677 /** 6678 * Return the class name of this object to be used for accessibility purposes. 6679 * Subclasses should only override this if they are implementing something that 6680 * should be seen as a completely new class of view when used by accessibility, 6681 * unrelated to the class it is deriving from. This is used to fill in 6682 * {@link AccessibilityNodeInfo#setClassName AccessibilityNodeInfo.setClassName}. 6683 */ 6684 public CharSequence getAccessibilityClassName() { 6685 return View.class.getName(); 6686 } 6687 6688 /** 6689 * Called when assist structure is being retrieved from a view as part of 6690 * {@link android.app.Activity#onProvideAssistData Activity.onProvideAssistData}. 6691 * @param structure Fill in with structured view data. The default implementation 6692 * fills in all data that can be inferred from the view itself. 6693 */ 6694 public void onProvideStructure(ViewStructure structure) { 6695 final int id = mID; 6696 if (id > 0 && (id&0xff000000) != 0 && (id&0x00ff0000) != 0 6697 && (id&0x0000ffff) != 0) { 6698 String pkg, type, entry; 6699 try { 6700 final Resources res = getResources(); 6701 entry = res.getResourceEntryName(id); 6702 type = res.getResourceTypeName(id); 6703 pkg = res.getResourcePackageName(id); 6704 } catch (Resources.NotFoundException e) { 6705 entry = type = pkg = null; 6706 } 6707 structure.setId(id, pkg, type, entry); 6708 } else { 6709 structure.setId(id, null, null, null); 6710 } 6711 structure.setDimens(mLeft, mTop, mScrollX, mScrollY, mRight - mLeft, mBottom - mTop); 6712 if (!hasIdentityMatrix()) { 6713 structure.setTransformation(getMatrix()); 6714 } 6715 structure.setElevation(getZ()); 6716 structure.setVisibility(getVisibility()); 6717 structure.setEnabled(isEnabled()); 6718 if (isClickable()) { 6719 structure.setClickable(true); 6720 } 6721 if (isFocusable()) { 6722 structure.setFocusable(true); 6723 } 6724 if (isFocused()) { 6725 structure.setFocused(true); 6726 } 6727 if (isAccessibilityFocused()) { 6728 structure.setAccessibilityFocused(true); 6729 } 6730 if (isSelected()) { 6731 structure.setSelected(true); 6732 } 6733 if (isActivated()) { 6734 structure.setActivated(true); 6735 } 6736 if (isLongClickable()) { 6737 structure.setLongClickable(true); 6738 } 6739 if (this instanceof Checkable) { 6740 structure.setCheckable(true); 6741 if (((Checkable)this).isChecked()) { 6742 structure.setChecked(true); 6743 } 6744 } 6745 if (isContextClickable()) { 6746 structure.setContextClickable(true); 6747 } 6748 structure.setClassName(getAccessibilityClassName().toString()); 6749 structure.setContentDescription(getContentDescription()); 6750 } 6751 6752 /** 6753 * Called when assist structure is being retrieved from a view as part of 6754 * {@link android.app.Activity#onProvideAssistData Activity.onProvideAssistData} to 6755 * generate additional virtual structure under this view. The defaullt implementation 6756 * uses {@link #getAccessibilityNodeProvider()} to try to generate this from the 6757 * view's virtual accessibility nodes, if any. You can override this for a more 6758 * optimal implementation providing this data. 6759 */ 6760 public void onProvideVirtualStructure(ViewStructure structure) { 6761 AccessibilityNodeProvider provider = getAccessibilityNodeProvider(); 6762 if (provider != null) { 6763 AccessibilityNodeInfo info = createAccessibilityNodeInfo(); 6764 structure.setChildCount(1); 6765 ViewStructure root = structure.newChild(0); 6766 populateVirtualStructure(root, provider, info); 6767 info.recycle(); 6768 } 6769 } 6770 6771 private void populateVirtualStructure(ViewStructure structure, 6772 AccessibilityNodeProvider provider, AccessibilityNodeInfo info) { 6773 structure.setId(AccessibilityNodeInfo.getVirtualDescendantId(info.getSourceNodeId()), 6774 null, null, null); 6775 Rect rect = structure.getTempRect(); 6776 info.getBoundsInParent(rect); 6777 structure.setDimens(rect.left, rect.top, 0, 0, rect.width(), rect.height()); 6778 structure.setVisibility(VISIBLE); 6779 structure.setEnabled(info.isEnabled()); 6780 if (info.isClickable()) { 6781 structure.setClickable(true); 6782 } 6783 if (info.isFocusable()) { 6784 structure.setFocusable(true); 6785 } 6786 if (info.isFocused()) { 6787 structure.setFocused(true); 6788 } 6789 if (info.isAccessibilityFocused()) { 6790 structure.setAccessibilityFocused(true); 6791 } 6792 if (info.isSelected()) { 6793 structure.setSelected(true); 6794 } 6795 if (info.isLongClickable()) { 6796 structure.setLongClickable(true); 6797 } 6798 if (info.isCheckable()) { 6799 structure.setCheckable(true); 6800 if (info.isChecked()) { 6801 structure.setChecked(true); 6802 } 6803 } 6804 if (info.isContextClickable()) { 6805 structure.setContextClickable(true); 6806 } 6807 CharSequence cname = info.getClassName(); 6808 structure.setClassName(cname != null ? cname.toString() : null); 6809 structure.setContentDescription(info.getContentDescription()); 6810 if (info.getText() != null || info.getError() != null) { 6811 structure.setText(info.getText(), info.getTextSelectionStart(), 6812 info.getTextSelectionEnd()); 6813 } 6814 final int NCHILDREN = info.getChildCount(); 6815 if (NCHILDREN > 0) { 6816 structure.setChildCount(NCHILDREN); 6817 for (int i=0; i<NCHILDREN; i++) { 6818 AccessibilityNodeInfo cinfo = provider.createAccessibilityNodeInfo( 6819 AccessibilityNodeInfo.getVirtualDescendantId(info.getChildId(i))); 6820 ViewStructure child = structure.newChild(i); 6821 populateVirtualStructure(child, provider, cinfo); 6822 cinfo.recycle(); 6823 } 6824 } 6825 } 6826 6827 /** 6828 * Dispatch creation of {@link ViewStructure} down the hierarchy. The default 6829 * implementation calls {@link #onProvideStructure} and 6830 * {@link #onProvideVirtualStructure}. 6831 */ 6832 public void dispatchProvideStructure(ViewStructure structure) { 6833 if (!isAssistBlocked()) { 6834 onProvideStructure(structure); 6835 onProvideVirtualStructure(structure); 6836 } else { 6837 structure.setClassName(getAccessibilityClassName().toString()); 6838 structure.setAssistBlocked(true); 6839 } 6840 } 6841 6842 /** 6843 * @see #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo) 6844 * 6845 * Note: Called from the default {@link AccessibilityDelegate}. 6846 * 6847 * @hide 6848 */ 6849 public void onInitializeAccessibilityNodeInfoInternal(AccessibilityNodeInfo info) { 6850 if (mAttachInfo == null) { 6851 return; 6852 } 6853 6854 Rect bounds = mAttachInfo.mTmpInvalRect; 6855 6856 getDrawingRect(bounds); 6857 info.setBoundsInParent(bounds); 6858 6859 getBoundsOnScreen(bounds, true); 6860 info.setBoundsInScreen(bounds); 6861 6862 ViewParent parent = getParentForAccessibility(); 6863 if (parent instanceof View) { 6864 info.setParent((View) parent); 6865 } 6866 6867 if (mID != View.NO_ID) { 6868 View rootView = getRootView(); 6869 if (rootView == null) { 6870 rootView = this; 6871 } 6872 6873 View label = rootView.findLabelForView(this, mID); 6874 if (label != null) { 6875 info.setLabeledBy(label); 6876 } 6877 6878 if ((mAttachInfo.mAccessibilityFetchFlags 6879 & AccessibilityNodeInfo.FLAG_REPORT_VIEW_IDS) != 0 6880 && Resources.resourceHasPackage(mID)) { 6881 try { 6882 String viewId = getResources().getResourceName(mID); 6883 info.setViewIdResourceName(viewId); 6884 } catch (Resources.NotFoundException nfe) { 6885 /* ignore */ 6886 } 6887 } 6888 } 6889 6890 if (mLabelForId != View.NO_ID) { 6891 View rootView = getRootView(); 6892 if (rootView == null) { 6893 rootView = this; 6894 } 6895 View labeled = rootView.findViewInsideOutShouldExist(this, mLabelForId); 6896 if (labeled != null) { 6897 info.setLabelFor(labeled); 6898 } 6899 } 6900 6901 if (mAccessibilityTraversalBeforeId != View.NO_ID) { 6902 View rootView = getRootView(); 6903 if (rootView == null) { 6904 rootView = this; 6905 } 6906 View next = rootView.findViewInsideOutShouldExist(this, 6907 mAccessibilityTraversalBeforeId); 6908 if (next != null && next.includeForAccessibility()) { 6909 info.setTraversalBefore(next); 6910 } 6911 } 6912 6913 if (mAccessibilityTraversalAfterId != View.NO_ID) { 6914 View rootView = getRootView(); 6915 if (rootView == null) { 6916 rootView = this; 6917 } 6918 View next = rootView.findViewInsideOutShouldExist(this, 6919 mAccessibilityTraversalAfterId); 6920 if (next != null && next.includeForAccessibility()) { 6921 info.setTraversalAfter(next); 6922 } 6923 } 6924 6925 info.setVisibleToUser(isVisibleToUser()); 6926 6927 if ((mAttachInfo != null) && ((mAttachInfo.mAccessibilityFetchFlags 6928 & AccessibilityNodeInfo.FLAG_INCLUDE_NOT_IMPORTANT_VIEWS) != 0)) { 6929 info.setImportantForAccessibility(isImportantForAccessibility()); 6930 } else { 6931 info.setImportantForAccessibility(true); 6932 } 6933 6934 info.setPackageName(mContext.getPackageName()); 6935 info.setClassName(getAccessibilityClassName()); 6936 info.setContentDescription(getContentDescription()); 6937 6938 info.setEnabled(isEnabled()); 6939 info.setClickable(isClickable()); 6940 info.setFocusable(isFocusable()); 6941 info.setFocused(isFocused()); 6942 info.setAccessibilityFocused(isAccessibilityFocused()); 6943 info.setSelected(isSelected()); 6944 info.setLongClickable(isLongClickable()); 6945 info.setContextClickable(isContextClickable()); 6946 info.setLiveRegion(getAccessibilityLiveRegion()); 6947 6948 // TODO: These make sense only if we are in an AdapterView but all 6949 // views can be selected. Maybe from accessibility perspective 6950 // we should report as selectable view in an AdapterView. 6951 info.addAction(AccessibilityNodeInfo.ACTION_SELECT); 6952 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_SELECTION); 6953 6954 if (isFocusable()) { 6955 if (isFocused()) { 6956 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_FOCUS); 6957 } else { 6958 info.addAction(AccessibilityNodeInfo.ACTION_FOCUS); 6959 } 6960 } 6961 6962 if (!isAccessibilityFocused()) { 6963 info.addAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS); 6964 } else { 6965 info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS); 6966 } 6967 6968 if (isClickable() && isEnabled()) { 6969 info.addAction(AccessibilityNodeInfo.ACTION_CLICK); 6970 } 6971 6972 if (isLongClickable() && isEnabled()) { 6973 info.addAction(AccessibilityNodeInfo.ACTION_LONG_CLICK); 6974 } 6975 6976 if (isContextClickable() && isEnabled()) { 6977 info.addAction(AccessibilityAction.ACTION_CONTEXT_CLICK); 6978 } 6979 6980 CharSequence text = getIterableTextForAccessibility(); 6981 if (text != null && text.length() > 0) { 6982 info.setTextSelection(getAccessibilitySelectionStart(), getAccessibilitySelectionEnd()); 6983 6984 info.addAction(AccessibilityNodeInfo.ACTION_SET_SELECTION); 6985 info.addAction(AccessibilityNodeInfo.