1 /* 2 * Copyright (C) 2009 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.accessibility; 18 19 import android.os.Parcel; 20 import android.os.Parcelable; 21 import android.text.TextUtils; 22 23 import java.util.ArrayList; 24 import java.util.List; 25 26 /** 27 * <p> 28 * This class represents accessibility events that are sent by the system when 29 * something notable happens in the user interface. For example, when a 30 * {@link android.widget.Button} is clicked, a {@link android.view.View} is focused, etc. 31 * </p> 32 * <p> 33 * An accessibility event is fired by an individual view which populates the event with 34 * data for its state and requests from its parent to send the event to interested 35 * parties. The parent can optionally add an {@link AccessibilityRecord} for itself before 36 * dispatching a similar request to its parent. A parent can also choose not to respect the 37 * request for sending an event. The accessibility event is sent by the topmost view in the 38 * view tree. Therefore, an {@link android.accessibilityservice.AccessibilityService} can 39 * explore all records in an accessibility event to obtain more information about the 40 * context in which the event was fired. 41 * </p> 42 * <p> 43 * The main purpose of an accessibility event is to expose enough information for an 44 * {@link android.accessibilityservice.AccessibilityService} to provide meaningful feedback 45 * to the user. Sometimes however, an accessibility service may need more contextual 46 * information then the one in the event pay-load. In such cases the service can obtain 47 * the event source which is an {@link AccessibilityNodeInfo} (snapshot of a View state) 48 * which can be used for exploring the window content. Note that the privilege for accessing 49 * an event's source, thus the window content, has to be explicitly requested. For more 50 * details refer to {@link android.accessibilityservice.AccessibilityService}. If an 51 * accessibility service has not requested to retrieve the window content the event will 52 * not contain reference to its source. Also for events of type 53 * {@link #TYPE_NOTIFICATION_STATE_CHANGED} the source is never available. 54 * </p> 55 * <p> 56 * This class represents various semantically different accessibility event 57 * types. Each event type has an associated set of related properties. In other 58 * words, each event type is characterized via a subset of the properties exposed 59 * by this class. For each event type there is a corresponding constant defined 60 * in this class. Follows a specification of the event types and their associated properties: 61 * </p> 62 * <div class="special reference"> 63 * <h3>Developer Guides</h3> 64 * <p>For more information about creating and processing AccessibilityEvents, read the 65 * <a href="{@docRoot}guide/topics/ui/accessibility/index.html">Accessibility</a> 66 * developer guide.</p> 67 * </div> 68 * <p> 69 * <b>VIEW TYPES</b></br> 70 * </p> 71 * <p> 72 * <b>View clicked</b> - represents the event of clicking on a {@link android.view.View} 73 * like {@link android.widget.Button}, {@link android.widget.CompoundButton}, etc.</br> 74 * <em>Type:</em>{@link #TYPE_VIEW_CLICKED}</br> 75 * <em>Properties:</em></br> 76 * <ul> 77 * <li>{@link #getEventType()} - The type of the event.</li> 78 * <li>{@link #getSource()} - The source info (for registered clients).</li> 79 * <li>{@link #getClassName()} - The class name of the source.</li> 80 * <li>{@link #getPackageName()} - The package name of the source.</li> 81 * <li>{@link #getEventTime()} - The event time.</li> 82 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 83 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 84 * <li>{@link #isPassword()} - Whether the source is password.</li> 85 * <li>{@link #isChecked()} - Whether the source is checked.</li> 86 * <li>{@link #getContentDescription()} - The content description of the source.</li> 87 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 88 * (without descendants of AdapterView).</li> 89 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 90 * (without descendants of AdapterView).</li> 91 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 92 * inclusive (for descendants of AdapterView).</li> 93 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 94 * inclusive (for descendants of AdapterView).</li> 95 * <li>{@link #getItemCount()} - The total items of the source 96 * (for descendants of AdapterView).</li> 97 * </ul> 98 * </p> 99 * <p> 100 * <b>View long clicked</b> - represents the event of long clicking on a {@link android.view.View} 101 * like {@link android.widget.Button}, {@link android.widget.CompoundButton}, etc </br> 102 * <em>Type:</em>{@link #TYPE_VIEW_LONG_CLICKED}</br> 103 * <em>Properties:</em></br> 104 * <ul> 105 * <li>{@link #getEventType()} - The type of the event.</li> 106 * <li>{@link #getSource()} - The source info (for registered clients).</li> 107 * <li>{@link #getClassName()} - The class name of the source.</li> 108 * <li>{@link #getPackageName()} - The package name of the source.</li> 109 * <li>{@link #getEventTime()} - The event time.</li> 110 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 111 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 112 * <li>{@link #isPassword()} - Whether the source is password.</li> 113 * <li>{@link #isChecked()} - Whether the source is checked.</li> 114 * <li>{@link #getContentDescription()} - The content description of the source.</li> 115 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 116 * (without descendants of AdapterView).</li> 117 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 118 * (without descendants of AdapterView).</li> 119 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 120 * inclusive (for descendants of AdapterView).</li> 121 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 122 * inclusive (for descendants of AdapterView).</li> 123 * <li>{@link #getItemCount()} - The total items of the source 124 * (for descendants of AdapterView).</li> 125 * </ul> 126 * </p> 127 * <p> 128 * <b>View selected</b> - represents the event of selecting an item usually in 129 * the context of an {@link android.widget.AdapterView}.</br> 130 * <em>Type:</em> {@link #TYPE_VIEW_SELECTED}</br> 131 * <em>Properties:</em></br> 132 * <ul> 133 * <li>{@link #getEventType()} - The type of the event.</li> 134 * <li>{@link #getSource()} - The source info (for registered clients).</li> 135 * <li>{@link #getClassName()} - The class name of the source.</li> 136 * <li>{@link #getPackageName()} - The package name of the source.</li> 137 * <li>{@link #getEventTime()} - The event time.</li> 138 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 139 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 140 * <li>{@link #isPassword()} - Whether the source is password.</li> 141 * <li>{@link #isChecked()} - Whether the source is checked.</li> 142 * <li>{@link #getItemCount()} - The number of selectable items of the source.</li> 143 * <li>{@link #getCurrentItemIndex()} - The currently selected item index.</li> 144 * <li>{@link #getContentDescription()} - The content description of the source.</li> 145 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 146 * (without descendants of AdapterView).</li> 147 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 148 * (without descendants of AdapterView).</li> 149 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 150 * inclusive (for descendants of AdapterView).</li> 151 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 152 * inclusive (for descendants of AdapterView).</li> 153 * <li>{@link #getItemCount()} - The total items of the source 154 * (for descendants of AdapterView).</li> 155 * </ul> 156 * </p> 157 * <p> 158 * <b>View focused</b> - represents the event of focusing a 159 * {@link android.view.View}.</br> 160 * <em>Type:</em> {@link #TYPE_VIEW_FOCUSED}</br> 161 * <em>Properties:</em></br> 162 * <ul> 163 * <li>{@link #getEventType()} - The type of the event.</li> 164 * <li>{@link #getSource()} - The source info (for registered clients).</li> 165 * <li>{@link #getClassName()} - The class name of the source.</li> 166 * <li>{@link #getPackageName()} - The package name of the source.</li> 167 * <li>{@link #getEventTime()} - The event time.</li> 168 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 169 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 170 * <li>{@link #isPassword()} - Whether the source is password.</li> 171 * <li>{@link #isChecked()} - Whether the source is checked.</li> 172 * <li>{@link #getItemCount()} - The number of focusable items on the screen.</li> 173 * <li>{@link #getCurrentItemIndex()} - The currently focused item index.</li> 174 * <li>{@link #getContentDescription()} - The content description of the source.</li> 175 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 176 * (without descendants of AdapterView).</li> 177 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 178 * (without descendants of AdapterView).</li> 179 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 180 * inclusive (for descendants of AdapterView).</li> 181 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 182 * inclusive (for descendants of AdapterView).</li> 183 * <li>{@link #getItemCount()} - The total items of the source 184 * (for descendants of AdapterView).</li> 185 * </ul> 186 * </p> 187 * <p> 188 * <b>View text changed</b> - represents the event of changing the text of an 189 * {@link android.widget.EditText}.</br> 190 * <em>Type:</em> {@link #TYPE_VIEW_TEXT_CHANGED}</br> 191 * <em>Properties:</em></br> 192 * <ul> 193 * <li>{@link #getEventType()} - The type of the event.</li> 194 * <li>{@link #getSource()} - The source info (for registered clients).</li> 195 * <li>{@link #getClassName()} - The class name of the source.</li> 196 * <li>{@link #getPackageName()} - The package name of the source.</li> 197 * <li>{@link #getEventTime()} - The event time.</li> 198 * <li>{@link #getText()} - The text of the source.</li> 199 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 200 * <li>{@link #isPassword()} - Whether the source is password.</li> 201 * <li>{@link #isChecked()} - Whether the source is checked.</li> 202 * <li>{@link #getFromIndex()} - The text change start index.</li> 203 * <li>{@link #getAddedCount()} - The number of added characters.</li> 204 * <li>{@link #getRemovedCount()} - The number of removed characters.</li> 205 * <li>{@link #getBeforeText()} - The text of the source before the change.</li> 206 * <li>{@link #getContentDescription()} - The content description of the source.</li> 207 * </ul> 208 * </p> 209 * <p> 210 * <b>View text selection changed</b> - represents the event of changing the text 211 * selection of an {@link android.widget.EditText}.</br> 212 * <em>Type:</em> {@link #TYPE_VIEW_TEXT_SELECTION_CHANGED} </br> 213 * <em>Properties:</em></br> 214 * <ul> 215 * <li>{@link #getEventType()} - The type of the event.</li> 216 * <li>{@link #getSource()} - The source info (for registered clients).</li> 217 * <li>{@link #getClassName()} - The class name of the source.</li> 218 * <li>{@link #getPackageName()} - The package name of the source.</li> 219 * <li>{@link #getEventTime()} - The event time.</li> 220 * <li>{@link #getText()} - The text of the source.</li> 221 * <li>{@link #isPassword()} - Whether the source is password.</li> 222 * <li>{@link #getFromIndex()} - The selection start index.</li> 223 * <li>{@link #getToIndex()} - The selection end index.</li> 224 * <li>{@link #getItemCount()} - The length of the source text.</li> 225 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 226 * <li>{@link #getContentDescription()} - The content description of the source.</li> 227 * </ul> 228 * </p> 229 * <b>View text traversed at movement granularity</b> - represents the event of traversing the 230 * text of a view at a given granularity. For example, moving to the next word.</br> 231 * <em>Type:</em> {@link #TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY} </br> 232 * <em>Properties:</em></br> 233 * <ul> 234 * <li>{@link #getEventType()} - The type of the event.</li> 235 * <li>{@link #getSource()} - The source info (for registered clients).</li> 236 * <li>{@link #getClassName()} - The class name of the source.</li> 237 * <li>{@link #getPackageName()} - The package name of the source.</li> 238 * <li>{@link #getEventTime()} - The event time.</li> 239 * <li>{@link #getMovementGranularity()} - Sets the granularity at which a view's text 240 * was traversed.</li> 241 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 242 * <li>{@link #getFromIndex()} - The start of the next/previous text at the specified granularity 243 * - inclusive.</li> 244 * <li>{@link #getToIndex()} - The end of the next/previous text at the specified granularity 245 * - exclusive.</li> 246 * <li>{@link #isPassword()} - Whether the source is password.</li> 247 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 248 * <li>{@link #getContentDescription()} - The content description of the source.</li> 249 * <li>{@link #getMovementGranularity()} - Sets the granularity at which a view's text 250 * was traversed.</li> 251 * <li>{@link #getAction()} - Gets traversal action which specifies the direction.</li> 252 * </ul> 253 * </p> 254 * <p> 255 * <b>View scrolled</b> - represents the event of scrolling a view. If 256 * the source is a descendant of {@link android.widget.AdapterView} the 257 * scroll is reported in terms of visible items - the first visible item, 258 * the last visible item, and the total items - because the the source 259 * is unaware of its pixel size since its adapter is responsible for 260 * creating views. In all other cases the scroll is reported as the current 261 * scroll on the X and Y axis respectively plus the height of the source in 262 * pixels.</br> 263 * <em>Type:</em> {@link #TYPE_VIEW_SCROLLED}</br> 264 * <em>Properties:</em></br> 265 * <ul> 266 * <li>{@link #getEventType()} - The type of the event.</li> 267 * <li>{@link #getSource()} - The source info (for registered clients).</li> 268 * <li>{@link #getClassName()} - The class name of the source.</li> 269 * <li>{@link #getPackageName()} - The package name of the source.</li> 270 * <li>{@link #getEventTime()} - The event time.</li> 271 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 272 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 273 * <li>{@link #getContentDescription()} - The content description of the source.</li> 274 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 275 * (without descendants of AdapterView).</li> 276 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 277 * (without descendants of AdapterView).</li> 278 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 279 * inclusive (for descendants of AdapterView).</li> 280 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 281 * inclusive (for descendants of AdapterView).</li> 282 * <li>{@link #getItemCount()} - The total items of the source 283 * (for descendants of AdapterView).</li> 284 * </ul> 285 * <em>Note:</em> This event type is not dispatched to descendants though 286 * {@link android.view.View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 287 * View.dispatchPopulateAccessibilityEvent(AccessibilityEvent)}, hence the event 288 * source {@link android.view.View} and the sub-tree rooted at it will not receive 289 * calls to {@link android.view.View#onPopulateAccessibilityEvent(AccessibilityEvent) 290 * View.onPopulateAccessibilityEvent(AccessibilityEvent)}. The preferred way to add 291 * text content to such events is by setting the 292 * {@link android.R.styleable#View_contentDescription contentDescription} of the source 293 * view.</br> 294 * </p> 295 * <p> 296 * <b>TRANSITION TYPES</b></br> 297 * </p> 298 * <p> 299 * <b>Window state changed</b> - represents the event of opening a 300 * {@link android.widget.PopupWindow}, {@link android.view.Menu}, 301 * {@link android.app.Dialog}, etc.</br> 302 * <em>Type:</em> {@link #TYPE_WINDOW_STATE_CHANGED}</br> 303 * <em>Properties:</em></br> 304 * <ul> 305 * <li>{@link #getEventType()} - The type of the event.</li> 306 * <li>{@link #getSource()} - The source info (for registered clients).</li> 307 * <li>{@link #getClassName()} - The class name of the source.</li> 308 * <li>{@link #getPackageName()} - The package name of the source.</li> 309 * <li>{@link #getEventTime()} - The event time.</li> 310 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 311 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 312 * </ul> 313 * </p> 314 * <p> 315 * <b>Window content changed</b> - represents the event of change in the 316 * content of a window. This change can be adding/removing view, changing 317 * a view size, etc.</br> 318 * </p> 319 * <p> 320 * <strong>Note:</strong> This event is fired only for the window source of the 321 * last accessibility event different from {@link #TYPE_NOTIFICATION_STATE_CHANGED} 322 * and its purpose is to notify clients that the content of the user interaction 323 * window has changed.</br> 324 * <em>Type:</em> {@link #TYPE_WINDOW_CONTENT_CHANGED}</br> 325 * <em>Properties:</em></br> 326 * <ul> 327 * <li>{@link #getEventType()} - The type of the event.</li> 328 * <li>{@link #getSource()} - The source info (for registered clients).</li> 329 * <li>{@link #getClassName()} - The class name of the source.</li> 330 * <li>{@link #getPackageName()} - The package name of the source.</li> 331 * <li>{@link #getEventTime()} - The event time.</li> 332 * </ul> 333 * <em>Note:</em> This event type is not dispatched to descendants though 334 * {@link android.view.View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 335 * View.dispatchPopulateAccessibilityEvent(AccessibilityEvent)}, hence the event 336 * source {@link android.view.View} and the sub-tree rooted at it will not receive 337 * calls to {@link android.view.View#onPopulateAccessibilityEvent(AccessibilityEvent) 338 * View.onPopulateAccessibilityEvent(AccessibilityEvent)}. The preferred way to add 339 * text content to such events is by setting the 340 * {@link android.R.styleable#View_contentDescription contentDescription} of the source 341 * view.</br> 342 * </p> 343 * <p> 344 * <b>NOTIFICATION TYPES</b></br> 345 * </p> 346 * <p> 347 * <b>Notification state changed</b> - represents the event showing 348 * {@link android.app.Notification}.</br> 349 * <em>Type:</em> {@link #TYPE_NOTIFICATION_STATE_CHANGED}</br> 350 * <em>Properties:</em></br> 351 * <ul> 352 * <li>{@link #getEventType()} - The type of the event.</li> 353 * <li>{@link #getClassName()} - The class name of the source.</li> 354 * <li>{@link #getPackageName()} - The package name of the source.</li> 355 * <li>{@link #getEventTime()} - The event time.</li> 356 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 357 * <li>{@link #getParcelableData()} - The posted {@link android.app.Notification}.</li> 358 * <li>{@link #getText()} - Text for providing more context.</li> 359 * </ul> 360 * <em>Note:</em> This event type is not dispatched to descendants though 361 * {@link android.view.View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 362 * View.dispatchPopulateAccessibilityEvent(AccessibilityEvent)}, hence the event 363 * source {@link android.view.View} and the sub-tree rooted at it will not receive 364 * calls to {@link android.view.View#onPopulateAccessibilityEvent(AccessibilityEvent) 365 * View.onPopulateAccessibilityEvent(AccessibilityEvent)}. The preferred way to add 366 * text content to such events is by setting the 367 * {@link android.R.styleable#View_contentDescription contentDescription} of the source 368 * view.</br> 369 * </p> 370 * <p> 371 * <b>EXPLORATION TYPES</b></br> 372 * </p> 373 * <p> 374 * <b>View hover enter</b> - represents the event of beginning to hover 375 * over a {@link android.view.View}. The hover may be generated via 376 * exploring the screen by touch or via a pointing device.</br> 377 * <em>Type:</em> {@link #TYPE_VIEW_HOVER_ENTER}</br> 378 * <em>Properties:</em></br> 379 * <ul> 380 * <li>{@link #getEventType()} - The type of the event.</li> 381 * <li>{@link #getSource()} - The source info (for registered clients).</li> 382 * <li>{@link #getClassName()} - The class name of the source.</li> 383 * <li>{@link #getPackageName()} - The package name of the source.</li> 384 * <li>{@link #getEventTime()} - The event time.</li> 385 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 386 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 387 * <li>{@link #getContentDescription()} - The content description of the source.</li> 388 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 389 * (without descendants of AdapterView).</li> 390 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 391 * (without descendants of AdapterView).</li> 392 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 393 * inclusive (for descendants of AdapterView).</li> 394 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 395 * inclusive (for descendants of AdapterView).</li> 396 * <li>{@link #getItemCount()} - The total items of the source 397 * (for descendants of AdapterView).</li> 398 * </ul> 399 * </p> 400 * <b>View hover exit</b> - represents the event of stopping to hover 401 * over a {@link android.view.View}. The hover may be generated via 402 * exploring the screen by touch or via a pointing device.</br> 403 * <em>Type:</em> {@link #TYPE_VIEW_HOVER_EXIT}</br> 404 * <em>Properties:</em></br> 405 * <ul> 406 * <li>{@link #getEventType()} - The type of the event.</li> 407 * <li>{@link #getSource()} - The source info (for registered clients).</li> 408 * <li>{@link #getClassName()} - The class name of the source.</li> 409 * <li>{@link #getPackageName()} - The package name of the source.</li> 410 * <li>{@link #getEventTime()} - The event time.</li> 411 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 412 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 413 * <li>{@link #getContentDescription()} - The content description of the source.</li> 414 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 415 * (without descendants of AdapterView).</li> 416 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 417 * (without descendants of AdapterView).</li> 418 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 419 * inclusive (for descendants of AdapterView).</li> 420 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 421 * inclusive (for descendants of AdapterView).</li> 422 * <li>{@link #getItemCount()} - The total items of the source 423 * (for descendants of AdapterView).</li> 424 * </ul> 425 * </p> 426 * <p> 427 * <b>Touch interaction start</b> - represents the event of starting a touch 428 * interaction, which is the user starts touching the screen.</br> 429 * <em>Type:</em> {@link #TYPE_TOUCH_INTERACTION_START}</br> 430 * <em>Properties:</em></br> 431 * <ul> 432 * <li>{@link #getEventType()} - The type of the event.</li> 433 * </ul> 434 * <em>Note:</em> This event is fired only by the system and is not passed to the 435 * view tree to be populated.</br> 436 * </p> 437 * <p> 438 * <b>Touch interaction end</b> - represents the event of ending a touch 439 * interaction, which is the user stops touching the screen.</br> 440 * <em>Type:</em> {@link #TYPE_TOUCH_INTERACTION_END}</br> 441 * <em>Properties:</em></br> 442 * <ul> 443 * <li>{@link #getEventType()} - The type of the event.</li> 444 * </ul> 445 * <em>Note:</em> This event is fired only by the system and is not passed to the 446 * view tree to be populated.</br> 447 * </p> 448 * <p> 449 * <b>Touch exploration gesture start</b> - represents the event of starting a touch 450 * exploring gesture.</br> 451 * <em>Type:</em> {@link #TYPE_TOUCH_EXPLORATION_GESTURE_START}</br> 452 * <em>Properties:</em></br> 453 * <ul> 454 * <li>{@link #getEventType()} - The type of the event.</li> 455 * </ul> 456 * <em>Note:</em> This event is fired only by the system and is not passed to the 457 * view tree to be populated.</br> 458 * </p> 459 * <p> 460 * <b>Touch exploration gesture end</b> - represents the event of ending a touch 461 * exploring gesture.</br> 462 * <em>Type:</em> {@link #TYPE_TOUCH_EXPLORATION_GESTURE_END}</br> 463 * <em>Properties:</em></br> 464 * <ul> 465 * <li>{@link #getEventType()} - The type of the event.</li> 466 * </ul> 467 * <em>Note:</em> This event is fired only by the system and is not passed to the 468 * view tree to be populated.</br> 469 * </p> 470 * <p> 471 * <b>Touch gesture detection start</b> - represents the event of starting a user 472 * gesture detection.</br> 473 * <em>Type:</em> {@link #TYPE_GESTURE_DETECTION_START}</br> 474 * <em>Properties:</em></br> 475 * <ul> 476 * <li>{@link #getEventType()} - The type of the event.</li> 477 * </ul> 478 * <em>Note:</em> This event is fired only by the system and is not passed to the 479 * view tree to be populated.</br> 480 * </p> 481 * <p> 482 * <b>Touch gesture detection end</b> - represents the event of ending a user 483 * gesture detection.</br> 484 * <em>Type:</em> {@link #TYPE_GESTURE_DETECTION_END}</br> 485 * <em>Properties:</em></br> 486 * <ul> 487 * <li>{@link #getEventType()} - The type of the event.</li> 488 * </ul> 489 * <em>Note:</em> This event is fired only by the system and is not passed to the 490 * view tree to be populated.</br> 491 * </p> 492 * <p> 493 * <b>MISCELLANEOUS TYPES</b></br> 494 * </p> 495 * <p> 496 * <b>Announcement</b> - represents the event of an application making an 497 * announcement. Usually this announcement is related to some sort of a context 498 * change for which none of the events representing UI transitions is a good fit. 499 * For example, announcing a new page in a book.</br> 500 * <em>Type:</em> {@link #TYPE_ANNOUNCEMENT}</br> 501 * <em>Properties:</em></br> 502 * <ul> 503 * <li>{@link #getEventType()} - The type of the event.</li> 504 * <li>{@link #getSource()} - The source info (for registered clients).</li> 505 * <li>{@link #getClassName()} - The class name of the source.</li> 506 * <li>{@link #getPackageName()} - The package name of the source.</li> 507 * <li>{@link #getEventTime()} - The event time.</li> 508 * <li>{@link #getText()} - The text of the announcement.</li> 509 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 510 * </ul> 511 * </p> 512 * <p> 513 * <b>Security note</b> 514 * <p> 515 * Since an event contains the text of its source privacy can be compromised by leaking 516 * sensitive information such as passwords. To address this issue any event fired in response 517 * to manipulation of a PASSWORD field does NOT CONTAIN the text of the password. 518 * </p> 519 * 520 * @see android.view.accessibility.AccessibilityManager 521 * @see android.accessibilityservice.AccessibilityService 522 * @see AccessibilityNodeInfo 523 */ 524 public final class AccessibilityEvent extends AccessibilityRecord implements Parcelable { 525 private static final boolean DEBUG = false; 526 527 /** 528 * Invalid selection/focus position. 529 * 530 * @see #getCurrentItemIndex() 531 */ 532 public static final int INVALID_POSITION = -1; 533 534 /** 535 * Maximum length of the text fields. 536 * 537 * @see #getBeforeText() 538 * @see #getText() 539 * </br> 540 * Note: This constant is no longer needed since there 541 * is no limit on the length of text that is contained 542 * in an accessibility event anymore. 543 */ 544 @Deprecated 545 public static final int MAX_TEXT_LENGTH = 500; 546 547 /** 548 * Represents the event of clicking on a {@link android.view.View} like 549 * {@link android.widget.Button}, {@link android.widget.CompoundButton}, etc. 550 */ 551 public static final int TYPE_VIEW_CLICKED = 0x00000001; 552 553 /** 554 * Represents the event of long clicking on a {@link android.view.View} like 555 * {@link android.widget.Button}, {@link android.widget.CompoundButton}, etc. 556 */ 557 public static final int TYPE_VIEW_LONG_CLICKED = 0x00000002; 558 559 /** 560 * Represents the event of selecting an item usually in the context of an 561 * {@link android.widget.AdapterView}. 562 */ 563 public static final int TYPE_VIEW_SELECTED = 0x00000004; 564 565 /** 566 * Represents the event of setting input focus of a {@link android.view.View}. 567 */ 568 public static final int TYPE_VIEW_FOCUSED = 0x00000008; 569 570 /** 571 * Represents the event of changing the text of an {@link android.widget.EditText}. 572 */ 573 public static final int TYPE_VIEW_TEXT_CHANGED = 0x00000010; 574 575 /** 576 * Represents the event of opening a {@link android.widget.PopupWindow}, 577 * {@link android.view.Menu}, {@link android.app.Dialog}, etc. 578 */ 579 public static final int TYPE_WINDOW_STATE_CHANGED = 0x00000020; 580 581 /** 582 * Represents the event showing a {@link android.app.Notification}. 583 */ 584 public static final int TYPE_NOTIFICATION_STATE_CHANGED = 0x00000040; 585 586 /** 587 * Represents the event of a hover enter over a {@link android.view.View}. 588 */ 589 public static final int TYPE_VIEW_HOVER_ENTER = 0x00000080; 590 591 /** 592 * Represents the event of a hover exit over a {@link android.view.View}. 593 */ 594 public static final int TYPE_VIEW_HOVER_EXIT = 0x00000100; 595 596 /** 597 * Represents the event of starting a touch exploration gesture. 598 */ 599 public static final int TYPE_TOUCH_EXPLORATION_GESTURE_START = 0x00000200; 600 601 /** 602 * Represents the event of ending a touch exploration gesture. 603 */ 604 public static final int TYPE_TOUCH_EXPLORATION_GESTURE_END = 0x00000400; 605 606 /** 607 * Represents the event of changing the content of a window and more 608 * specifically the sub-tree rooted at the event's source. 609 */ 610 public static final int TYPE_WINDOW_CONTENT_CHANGED = 0x00000800; 611 612 /** 613 * Represents the event of scrolling a view. 614 */ 615 public static final int TYPE_VIEW_SCROLLED = 0x00001000; 616 617 /** 618 * Represents the event of changing the selection in an {@link android.widget.EditText}. 619 */ 620 public static final int TYPE_VIEW_TEXT_SELECTION_CHANGED = 0x00002000; 621 622 /** 623 * Represents the event of an application making an announcement. 624 */ 625 public static final int TYPE_ANNOUNCEMENT = 0x00004000; 626 627 /** 628 * Represents the event of gaining accessibility focus. 629 */ 630 public static final int TYPE_VIEW_ACCESSIBILITY_FOCUSED = 0x00008000; 631 632 /** 633 * Represents the event of clearing accessibility focus. 634 */ 635 public static final int TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED = 0x00010000; 636 637 /** 638 * Represents the event of traversing the text of a view at a given movement granularity. 639 */ 640 public static final int TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY = 0x00020000; 641 642 /** 643 * Represents the event of beginning gesture detection. 644 */ 645 public static final int TYPE_GESTURE_DETECTION_START = 0x00040000; 646 647 /** 648 * Represents the event of ending gesture detection. 649 */ 650 public static final int TYPE_GESTURE_DETECTION_END = 0x00080000; 651 652 /** 653 * Represents the event of the user starting to touch the screen. 654 */ 655 public static final int TYPE_TOUCH_INTERACTION_START = 0x00100000; 656 657 /** 658 * Represents the event of the user ending to touch the screen. 659 */ 660 public static final int TYPE_TOUCH_INTERACTION_END = 0x00200000; 661 662 /** 663 * Mask for {@link AccessibilityEvent} all types. 664 * 665 * @see #TYPE_VIEW_CLICKED 666 * @see #TYPE_VIEW_LONG_CLICKED 667 * @see #TYPE_VIEW_SELECTED 668 * @see #TYPE_VIEW_FOCUSED 669 * @see #TYPE_VIEW_TEXT_CHANGED 670 * @see #TYPE_WINDOW_STATE_CHANGED 671 * @see #TYPE_NOTIFICATION_STATE_CHANGED 672 * @see #TYPE_VIEW_HOVER_ENTER 673 * @see #TYPE_VIEW_HOVER_EXIT 674 * @see #TYPE_TOUCH_EXPLORATION_GESTURE_START 675 * @see #TYPE_TOUCH_EXPLORATION_GESTURE_END 676 * @see #TYPE_WINDOW_CONTENT_CHANGED 677 * @see #TYPE_VIEW_SCROLLED 678 * @see #TYPE_VIEW_TEXT_SELECTION_CHANGED 679 * @see #TYPE_ANNOUNCEMENT 680 * @see #TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY 681 * @see #TYPE_GESTURE_DETECTION_START 682 * @see #TYPE_GESTURE_DETECTION_END 683 * @see #TYPE_TOUCH_INTERACTION_START 684 * @see #TYPE_TOUCH_INTERACTION_END 685 */ 686 public static final int TYPES_ALL_MASK = 0xFFFFFFFF; 687 688 private static final int MAX_POOL_SIZE = 10; 689 private static final Object sPoolLock = new Object(); 690 private static AccessibilityEvent sPool; 691 private static int sPoolSize; 692 private AccessibilityEvent mNext; 693 private boolean mIsInPool; 694 695 private int mEventType; 696 private CharSequence mPackageName; 697 private long mEventTime; 698 int mMovementGranularity; 699 int mAction; 700 701 private final ArrayList<AccessibilityRecord> mRecords = new ArrayList<AccessibilityRecord>(); 702 703 /* 704 * Hide constructor from clients. 705 */ 706 private AccessibilityEvent() { 707 } 708 709 /** 710 * Initialize an event from another one. 711 * 712 * @param event The event to initialize from. 713 */ 714 void init(AccessibilityEvent event) { 715 super.init(event); 716 mEventType = event.mEventType; 717 mMovementGranularity = event.mMovementGranularity; 718 mAction = event.mAction; 719 mEventTime = event.mEventTime; 720 mPackageName = event.mPackageName; 721 } 722 723 /** 724 * Sets if this instance is sealed. 725 * 726 * @param sealed Whether is sealed. 727 * 728 * @hide 729 */ 730 @Override 731 public void setSealed(boolean sealed) { 732 super.setSealed(sealed); 733 List<AccessibilityRecord> records = mRecords; 734 final int recordCount = records.size(); 735 for (int i = 0; i < recordCount; i++) { 736 AccessibilityRecord record = records.get(i); 737 record.setSealed(sealed); 738 } 739 } 740 741 /** 742 * Gets the number of records contained in the event. 743 * 744 * @return The number of records. 745 */ 746 public int getRecordCount() { 747 return mRecords.size(); 748 } 749 750 /** 751 * Appends an {@link AccessibilityRecord} to the end of event records. 752 * 753 * @param record The record to append. 754 * 755 * @throws IllegalStateException If called from an AccessibilityService. 756 */ 757 public void appendRecord(AccessibilityRecord record) { 758 enforceNotSealed(); 759 mRecords.add(record); 760 } 761 762 /** 763 * Gets the record at a given index. 764 * 765 * @param index The index. 766 * @return The record at the specified index. 767 */ 768 public AccessibilityRecord getRecord(int index) { 769 return mRecords.get(index); 770 } 771 772 /** 773 * Gets the event type. 774 * 775 * @return The event type. 776 */ 777 public int getEventType() { 778 return mEventType; 779 } 780 781 /** 782 * Sets the event type. 783 * 784 * @param eventType The event type. 785 * 786 * @throws IllegalStateException If called from an AccessibilityService. 787 */ 788 public void setEventType(int eventType) { 789 enforceNotSealed(); 790 mEventType = eventType; 791 } 792 793 /** 794 * Gets the time in which this event was sent. 795 * 796 * @return The event time. 797 */ 798 public long getEventTime() { 799 return mEventTime; 800 } 801 802 /** 803 * Sets the time in which this event was sent. 804 * 805 * @param eventTime The event time. 806 * 807 * @throws IllegalStateException If called from an AccessibilityService. 808 */ 809 public void setEventTime(long eventTime) { 810 enforceNotSealed(); 811 mEventTime = eventTime; 812 } 813 814 /** 815 * Gets the package name of the source. 816 * 817 * @return The package name. 818 */ 819 public CharSequence getPackageName() { 820 return mPackageName; 821 } 822 823 /** 824 * Sets the package name of the source. 825 * 826 * @param packageName The package name. 827 * 828 * @throws IllegalStateException If called from an AccessibilityService. 829 */ 830 public void setPackageName(CharSequence packageName) { 831 enforceNotSealed(); 832 mPackageName = packageName; 833 } 834 835 /** 836 * Sets the movement granularity that was traversed. 837 * 838 * @param granularity The granularity. 839 * 840 * @throws IllegalStateException If called from an AccessibilityService. 841 */ 842 public void setMovementGranularity(int granularity) { 843 enforceNotSealed(); 844 mMovementGranularity = granularity; 845 } 846 847 /** 848 * Gets the movement granularity that was traversed. 849 * 850 * @return The granularity. 851 */ 852 public int getMovementGranularity() { 853 return mMovementGranularity; 854 } 855 856 /** 857 * Sets the performed action that triggered this event. 858 * 859 * @param action The action. 860 * 861 * @throws IllegalStateException If called from an AccessibilityService. 862 */ 863 public void setAction(int action) { 864 enforceNotSealed(); 865 mAction = action; 866 } 867 868 /** 869 * Gets the performed action that triggered this event. 870 * 871 * @return The action. 872 */ 873 public int getAction() { 874 return mAction; 875 } 876 877 /** 878 * Returns a cached instance if such is available or a new one is 879 * instantiated with its type property set. 880 * 881 * @param eventType The event type. 882 * @return An instance. 883 */ 884 public static AccessibilityEvent obtain(int eventType) { 885 AccessibilityEvent event = AccessibilityEvent.obtain(); 886 event.setEventType(eventType); 887 return event; 888 } 889 890 /** 891 * Returns a cached instance if such is available or a new one is 892 * created. The returned instance is initialized from the given 893 * <code>event</code>. 894 * 895 * @param event The other event. 896 * @return An instance. 897 */ 898 public static AccessibilityEvent obtain(AccessibilityEvent event) { 899 AccessibilityEvent eventClone = AccessibilityEvent.obtain(); 900 eventClone.init(event); 901 902 final int recordCount = event.mRecords.size(); 903 for (int i = 0; i < recordCount; i++) { 904 AccessibilityRecord record = event.mRecords.get(i); 905 AccessibilityRecord recordClone = AccessibilityRecord.obtain(record); 906 eventClone.mRecords.add(recordClone); 907 } 908 909 return eventClone; 910 } 911 912 /** 913 * Returns a cached instance if such is available or a new one is 914 * instantiated. 915 * 916 * @return An instance. 917 */ 918 public static AccessibilityEvent obtain() { 919 synchronized (sPoolLock) { 920 if (sPool != null) { 921 AccessibilityEvent event = sPool; 922 sPool = sPool.mNext; 923 sPoolSize--; 924 event.mNext = null; 925 event.mIsInPool = false; 926 return event; 927 } 928 return new AccessibilityEvent(); 929 } 930 } 931 932 /** 933 * Recycles an instance back to be reused. 934 * <p> 935 * <b>Note: You must not touch the object after calling this function.</b> 936 * </p> 937 * 938 * @throws IllegalStateException If the event is already recycled. 939 */ 940 @Override 941 public void recycle() { 942 if (mIsInPool) { 943 throw new IllegalStateException("Event already recycled!"); 944 } 945 clear(); 946 synchronized (sPoolLock) { 947 if (sPoolSize <= MAX_POOL_SIZE) { 948 mNext = sPool; 949 sPool = this; 950 mIsInPool = true; 951 sPoolSize++; 952 } 953 } 954 } 955 956 /** 957 * Clears the state of this instance. 958 * 959 * @hide 960 */ 961 @Override 962 protected void clear() { 963 super.clear(); 964 mEventType = 0; 965 mMovementGranularity = 0; 966 mAction = 0; 967 mPackageName = null; 968 mEventTime = 0; 969 while (!mRecords.isEmpty()) { 970 AccessibilityRecord record = mRecords.remove(0); 971 record.recycle(); 972 } 973 } 974 975 /** 976 * Creates a new instance from a {@link Parcel}. 977 * 978 * @param parcel A parcel containing the state of a {@link AccessibilityEvent}. 979 */ 980 public void initFromParcel(Parcel parcel) { 981 mSealed = (parcel.readInt() == 1); 982 mEventType = parcel.readInt(); 983 mMovementGranularity = parcel.readInt(); 984 mAction = parcel.readInt(); 985 mPackageName = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel); 986 mEventTime = parcel.readLong(); 987 mConnectionId = parcel.readInt(); 988 readAccessibilityRecordFromParcel(this, parcel); 989 990 // Read the records. 991 final int recordCount = parcel.readInt(); 992 for (int i = 0; i < recordCount; i++) { 993 AccessibilityRecord record = AccessibilityRecord.obtain(); 994 readAccessibilityRecordFromParcel(record, parcel); 995 record.mConnectionId = mConnectionId; 996 mRecords.add(record); 997 } 998 } 999 1000 /** 1001 * Reads an {@link AccessibilityRecord} from a parcel. 1002 * 1003 * @param record The record to initialize. 1004 * @param parcel The parcel to read from. 1005 */ 1006 private void readAccessibilityRecordFromParcel(AccessibilityRecord record, 1007 Parcel parcel) { 1008 record.mBooleanProperties = parcel.readInt(); 1009 record.mCurrentItemIndex = parcel.readInt(); 1010 record.mItemCount = parcel.readInt(); 1011 record.mFromIndex = parcel.readInt(); 1012 record.mToIndex = parcel.readInt(); 1013 record.mScrollX = parcel.readInt(); 1014 record.mScrollY = parcel.readInt(); 1015 record.mMaxScrollX = parcel.readInt(); 1016 record.mMaxScrollY = parcel.readInt(); 1017 record.mAddedCount = parcel.readInt(); 1018 record.mRemovedCount = parcel.readInt(); 1019 record.mClassName = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel); 1020 record.mContentDescription = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel); 1021 record.mBeforeText = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel); 1022 record.mParcelableData = parcel.readParcelable(null); 1023 parcel.readList(record.mText, null); 1024 record.mSourceWindowId = parcel.readInt(); 1025 record.mSourceNodeId = parcel.readLong(); 1026 record.mSealed = (parcel.readInt() == 1); 1027 } 1028 1029 /** 1030 * {@inheritDoc} 1031 */ 1032 public void writeToParcel(Parcel parcel, int flags) { 1033 parcel.writeInt(isSealed() ? 1 : 0); 1034 parcel.writeInt(mEventType); 1035 parcel.writeInt(mMovementGranularity); 1036 parcel.writeInt(mAction); 1037 TextUtils.writeToParcel(mPackageName, parcel, 0); 1038 parcel.writeLong(mEventTime); 1039 parcel.writeInt(mConnectionId); 1040 writeAccessibilityRecordToParcel(this, parcel, flags); 1041 1042 // Write the records. 1043 final int recordCount = getRecordCount(); 1044 parcel.writeInt(recordCount); 1045 for (int i = 0; i < recordCount; i++) { 1046 AccessibilityRecord record = mRecords.get(i); 1047 writeAccessibilityRecordToParcel(record, parcel, flags); 1048 } 1049 } 1050 1051 /** 1052 * Writes an {@link AccessibilityRecord} to a parcel. 1053 * 1054 * @param record The record to write. 1055 * @param parcel The parcel to which to write. 1056 */ 1057 private void writeAccessibilityRecordToParcel(AccessibilityRecord record, Parcel parcel, 1058 int flags) { 1059 parcel.writeInt(record.mBooleanProperties); 1060 parcel.writeInt(record.mCurrentItemIndex); 1061 parcel.writeInt(record.mItemCount); 1062 parcel.writeInt(record.mFromIndex); 1063 parcel.writeInt(record.mToIndex); 1064 parcel.writeInt(record.mScrollX); 1065 parcel.writeInt(record.mScrollY); 1066 parcel.writeInt(record.mMaxScrollX); 1067 parcel.writeInt(record.mMaxScrollY); 1068 parcel.writeInt(record.mAddedCount); 1069 parcel.writeInt(record.mRemovedCount); 1070 TextUtils.writeToParcel(record.mClassName, parcel, flags); 1071 TextUtils.writeToParcel(record.mContentDescription, parcel, flags); 1072 TextUtils.writeToParcel(record.mBeforeText, parcel, flags); 1073 parcel.writeParcelable(record.mParcelableData, flags); 1074 parcel.writeList(record.mText); 1075 parcel.writeInt(record.mSourceWindowId); 1076 parcel.writeLong(record.mSourceNodeId); 1077 parcel.writeInt(record.mSealed ? 1 : 0); 1078 } 1079 1080 /** 1081 * {@inheritDoc} 1082 */ 1083 public int describeContents() { 1084 return 0; 1085 } 1086 1087 @Override 1088 public String toString() { 1089 StringBuilder builder = new StringBuilder(); 1090 builder.append("EventType: ").append(eventTypeToString(mEventType)); 1091 builder.append("; EventTime: ").append(mEventTime); 1092 builder.append("; PackageName: ").append(mPackageName); 1093 builder.append("; MovementGranularity: ").append(mMovementGranularity); 1094 builder.append("; Action: ").append(mAction); 1095 builder.append(super.toString()); 1096 if (DEBUG) { 1097 builder.append("\n"); 1098 builder.append("; sourceWindowId: ").append(mSourceWindowId); 1099 builder.append("; mSourceNodeId: ").append(mSourceNodeId); 1100 for (int i = 0; i < mRecords.size(); i++) { 1101 AccessibilityRecord record = mRecords.get(i); 1102 builder.append(" Record "); 1103 builder.append(i); 1104 builder.append(":"); 1105 builder.append(" [ ClassName: " + record.mClassName); 1106 builder.append("; Text: " + record.mText); 1107 builder.append("; ContentDescription: " + record.mContentDescription); 1108 builder.append("; ItemCount: " + record.mItemCount); 1109 builder.append("; CurrentItemIndex: " + record.mCurrentItemIndex); 1110 builder.append("; IsEnabled: " + record.isEnabled()); 1111 builder.append("; IsPassword: " + record.isPassword()); 1112 builder.append("; IsChecked: " + record.isChecked()); 1113 builder.append("; IsFullScreen: " + record.isFullScreen()); 1114 builder.append("; Scrollable: " + record.isScrollable()); 1115 builder.append("; BeforeText: " + record.mBeforeText); 1116 builder.append("; FromIndex: " + record.mFromIndex); 1117 builder.append("; ToIndex: " + record.mToIndex); 1118 builder.append("; ScrollX: " + record.mScrollX); 1119 builder.append("; ScrollY: " + record.mScrollY); 1120 builder.append("; AddedCount: " + record.mAddedCount); 1121 builder.append("; RemovedCount: " + record.mRemovedCount); 1122 builder.append("; ParcelableData: " + record.mParcelableData); 1123 builder.append(" ]"); 1124 builder.append("\n"); 1125 } 1126 } else { 1127 builder.append("; recordCount: ").append(getRecordCount()); 1128 } 1129 return builder.toString(); 1130 } 1131 1132 /** 1133 * Returns the string representation of an event type. For example, 1134 * {@link #TYPE_VIEW_CLICKED} is represented by the string TYPE_VIEW_CLICKED. 1135 * 1136 * @param eventType The event type 1137 * @return The string representation. 1138 */ 1139 public static String eventTypeToString(int eventType) { 1140 switch (eventType) { 1141 case TYPE_VIEW_CLICKED: 1142 return "TYPE_VIEW_CLICKED"; 1143 case TYPE_VIEW_LONG_CLICKED: 1144 return "TYPE_VIEW_LONG_CLICKED"; 1145 case TYPE_VIEW_SELECTED: 1146 return "TYPE_VIEW_SELECTED"; 1147 case TYPE_VIEW_FOCUSED: 1148 return "TYPE_VIEW_FOCUSED"; 1149 case TYPE_VIEW_TEXT_CHANGED: 1150 return "TYPE_VIEW_TEXT_CHANGED"; 1151 case TYPE_WINDOW_STATE_CHANGED: 1152 return "TYPE_WINDOW_STATE_CHANGED"; 1153 case TYPE_VIEW_HOVER_ENTER: 1154 return "TYPE_VIEW_HOVER_ENTER"; 1155 case TYPE_VIEW_HOVER_EXIT: 1156 return "TYPE_VIEW_HOVER_EXIT"; 1157 case TYPE_NOTIFICATION_STATE_CHANGED: 1158 return "TYPE_NOTIFICATION_STATE_CHANGED"; 1159 case TYPE_TOUCH_EXPLORATION_GESTURE_START: 1160 return "TYPE_TOUCH_EXPLORATION_GESTURE_START"; 1161 case TYPE_TOUCH_EXPLORATION_GESTURE_END: 1162 return "TYPE_TOUCH_EXPLORATION_GESTURE_END"; 1163 case TYPE_WINDOW_CONTENT_CHANGED: 1164 return "TYPE_WINDOW_CONTENT_CHANGED"; 1165 case TYPE_VIEW_TEXT_SELECTION_CHANGED: 1166 return "TYPE_VIEW_TEXT_SELECTION_CHANGED"; 1167 case TYPE_VIEW_SCROLLED: 1168 return "TYPE_VIEW_SCROLLED"; 1169 case TYPE_ANNOUNCEMENT: 1170 return "TYPE_ANNOUNCEMENT"; 1171 case TYPE_VIEW_ACCESSIBILITY_FOCUSED: 1172 return "TYPE_VIEW_ACCESSIBILITY_FOCUSED"; 1173 case TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED: 1174 return "TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED"; 1175 case TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY: 1176 return "TYPE_CURRENT_AT_GRANULARITY_MOVEMENT_CHANGED"; 1177 case TYPE_GESTURE_DETECTION_START: 1178 return "TYPE_GESTURE_DETECTION_START"; 1179 case TYPE_GESTURE_DETECTION_END: 1180 return "TYPE_GESTURE_DETECTION_END"; 1181 case TYPE_TOUCH_INTERACTION_START: 1182 return "TYPE_TOUCH_INTERACTION_START"; 1183 case TYPE_TOUCH_INTERACTION_END: 1184 return "TYPE_TOUCH_INTERACTION_END"; 1185 default: 1186 return null; 1187 } 1188 } 1189 1190 /** 1191 * @see Parcelable.Creator 1192 */ 1193 public static final Parcelable.Creator<AccessibilityEvent> CREATOR = 1194 new Parcelable.Creator<AccessibilityEvent>() { 1195 public AccessibilityEvent createFromParcel(Parcel parcel) { 1196 AccessibilityEvent event = AccessibilityEvent.obtain(); 1197 event.initFromParcel(parcel); 1198 return event; 1199 } 1200 1201 public AccessibilityEvent[] newArray(int size) { 1202 return new AccessibilityEvent[size]; 1203 } 1204 }; 1205 } 1206
