AccessibilityEvent.java revision 6254f4806dd3db53b7380e77fbb183065685573e
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 17package android.view.accessibility; 18 19import android.os.Parcel; 20import android.os.Parcelable; 21import android.text.TextUtils; 22import android.util.Pools.SynchronizedPool; 23 24import java.util.ArrayList; 25import java.util.List; 26 27/** 28 * <p> 29 * This class represents accessibility events that are sent by the system when 30 * something notable happens in the user interface. For example, when a 31 * {@link android.widget.Button} is clicked, a {@link android.view.View} is focused, etc. 32 * </p> 33 * <p> 34 * An accessibility event is fired by an individual view which populates the event with 35 * data for its state and requests from its parent to send the event to interested 36 * parties. The parent can optionally add an {@link AccessibilityRecord} for itself before 37 * dispatching a similar request to its parent. A parent can also choose not to respect the 38 * request for sending an event. The accessibility event is sent by the topmost view in the 39 * view tree. Therefore, an {@link android.accessibilityservice.AccessibilityService} can 40 * explore all records in an accessibility event to obtain more information about the 41 * context in which the event was fired. 42 * </p> 43 * <p> 44 * The main purpose of an accessibility event is to expose enough information for an 45 * {@link android.accessibilityservice.AccessibilityService} to provide meaningful feedback 46 * to the user. Sometimes however, an accessibility service may need more contextual 47 * information then the one in the event pay-load. In such cases the service can obtain 48 * the event source which is an {@link AccessibilityNodeInfo} (snapshot of a View state) 49 * which can be used for exploring the window content. Note that the privilege for accessing 50 * an event's source, thus the window content, has to be explicitly requested. For more 51 * details refer to {@link android.accessibilityservice.AccessibilityService}. If an 52 * accessibility service has not requested to retrieve the window content the event will 53 * not contain reference to its source. Also for events of type 54 * {@link #TYPE_NOTIFICATION_STATE_CHANGED} the source is never available. 55 * </p> 56 * <p> 57 * This class represents various semantically different accessibility event 58 * types. Each event type has an associated set of related properties. In other 59 * words, each event type is characterized via a subset of the properties exposed 60 * by this class. For each event type there is a corresponding constant defined 61 * in this class. Follows a specification of the event types and their associated properties: 62 * </p> 63 * <div class="special reference"> 64 * <h3>Developer Guides</h3> 65 * <p>For more information about creating and processing AccessibilityEvents, read the 66 * <a href="{@docRoot}guide/topics/ui/accessibility/index.html">Accessibility</a> 67 * developer guide.</p> 68 * </div> 69 * <p> 70 * <b>VIEW TYPES</b></br> 71 * </p> 72 * <p> 73 * <b>View clicked</b> - represents the event of clicking on a {@link android.view.View} 74 * like {@link android.widget.Button}, {@link android.widget.CompoundButton}, etc.</br> 75 * <em>Type:</em>{@link #TYPE_VIEW_CLICKED}</br> 76 * <em>Properties:</em></br> 77 * <ul> 78 * <li>{@link #getEventType()} - The type of the event.</li> 79 * <li>{@link #getSource()} - The source info (for registered clients).</li> 80 * <li>{@link #getClassName()} - The class name of the source.</li> 81 * <li>{@link #getPackageName()} - The package name of the source.</li> 82 * <li>{@link #getEventTime()} - The event time.</li> 83 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 84 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 85 * <li>{@link #isPassword()} - Whether the source is password.</li> 86 * <li>{@link #isChecked()} - Whether the source is checked.</li> 87 * <li>{@link #getContentDescription()} - The content description of the source.</li> 88 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 89 * (without descendants of AdapterView).</li> 90 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 91 * (without descendants of AdapterView).</li> 92 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 93 * inclusive (for descendants of AdapterView).</li> 94 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 95 * inclusive (for descendants of AdapterView).</li> 96 * <li>{@link #getItemCount()} - The total items of the source 97 * (for descendants of AdapterView).</li> 98 * </ul> 99 * </p> 100 * <p> 101 * <b>View long clicked</b> - represents the event of long clicking on a {@link android.view.View} 102 * like {@link android.widget.Button}, {@link android.widget.CompoundButton}, etc </br> 103 * <em>Type:</em>{@link #TYPE_VIEW_LONG_CLICKED}</br> 104 * <em>Properties:</em></br> 105 * <ul> 106 * <li>{@link #getEventType()} - The type of the event.</li> 107 * <li>{@link #getSource()} - The source info (for registered clients).</li> 108 * <li>{@link #getClassName()} - The class name of the source.</li> 109 * <li>{@link #getPackageName()} - The package name of the source.</li> 110 * <li>{@link #getEventTime()} - The event time.</li> 111 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 112 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 113 * <li>{@link #isPassword()} - Whether the source is password.</li> 114 * <li>{@link #isChecked()} - Whether the source is checked.</li> 115 * <li>{@link #getContentDescription()} - The content description of the source.</li> 116 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 117 * (without descendants of AdapterView).</li> 118 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 119 * (without descendants of AdapterView).</li> 120 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 121 * inclusive (for descendants of AdapterView).</li> 122 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 123 * inclusive (for descendants of AdapterView).</li> 124 * <li>{@link #getItemCount()} - The total items of the source 125 * (for descendants of AdapterView).</li> 126 * </ul> 127 * </p> 128 * <p> 129 * <b>View selected</b> - represents the event of selecting an item usually in 130 * the context of an {@link android.widget.AdapterView}.</br> 131 * <em>Type:</em> {@link #TYPE_VIEW_SELECTED}</br> 132 * <em>Properties:</em></br> 133 * <ul> 134 * <li>{@link #getEventType()} - The type of the event.</li> 135 * <li>{@link #getSource()} - The source info (for registered clients).</li> 136 * <li>{@link #getClassName()} - The class name of the source.</li> 137 * <li>{@link #getPackageName()} - The package name of the source.</li> 138 * <li>{@link #getEventTime()} - The event time.</li> 139 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 140 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 141 * <li>{@link #isPassword()} - Whether the source is password.</li> 142 * <li>{@link #isChecked()} - Whether the source is checked.</li> 143 * <li>{@link #getItemCount()} - The number of selectable items of the source.</li> 144 * <li>{@link #getCurrentItemIndex()} - The currently selected item index.</li> 145 * <li>{@link #getContentDescription()} - The content description of the source.</li> 146 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 147 * (without descendants of AdapterView).</li> 148 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 149 * (without descendants of AdapterView).</li> 150 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 151 * inclusive (for descendants of AdapterView).</li> 152 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 153 * inclusive (for descendants of AdapterView).</li> 154 * <li>{@link #getItemCount()} - The total items of the source 155 * (for descendants of AdapterView).</li> 156 * </ul> 157 * </p> 158 * <p> 159 * <b>View focused</b> - represents the event of focusing a 160 * {@link android.view.View}.</br> 161 * <em>Type:</em> {@link #TYPE_VIEW_FOCUSED}</br> 162 * <em>Properties:</em></br> 163 * <ul> 164 * <li>{@link #getEventType()} - The type of the event.</li> 165 * <li>{@link #getSource()} - The source info (for registered clients).</li> 166 * <li>{@link #getClassName()} - The class name of the source.</li> 167 * <li>{@link #getPackageName()} - The package name of the source.</li> 168 * <li>{@link #getEventTime()} - The event time.</li> 169 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 170 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 171 * <li>{@link #isPassword()} - Whether the source is password.</li> 172 * <li>{@link #isChecked()} - Whether the source is checked.</li> 173 * <li>{@link #getItemCount()} - The number of focusable items on the screen.</li> 174 * <li>{@link #getCurrentItemIndex()} - The currently focused item index.</li> 175 * <li>{@link #getContentDescription()} - The content description of the source.</li> 176 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 177 * (without descendants of AdapterView).</li> 178 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 179 * (without descendants of AdapterView).</li> 180 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 181 * inclusive (for descendants of AdapterView).</li> 182 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 183 * inclusive (for descendants of AdapterView).</li> 184 * <li>{@link #getItemCount()} - The total items of the source 185 * (for descendants of AdapterView).</li> 186 * </ul> 187 * </p> 188 * <p> 189 * <b>View text changed</b> - represents the event of changing the text of an 190 * {@link android.widget.EditText}.</br> 191 * <em>Type:</em> {@link #TYPE_VIEW_TEXT_CHANGED}</br> 192 * <em>Properties:</em></br> 193 * <ul> 194 * <li>{@link #getEventType()} - The type of the event.</li> 195 * <li>{@link #getSource()} - The source info (for registered clients).</li> 196 * <li>{@link #getClassName()} - The class name of the source.</li> 197 * <li>{@link #getPackageName()} - The package name of the source.</li> 198 * <li>{@link #getEventTime()} - The event time.</li> 199 * <li>{@link #getText()} - The text of the source.</li> 200 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 201 * <li>{@link #isPassword()} - Whether the source is password.</li> 202 * <li>{@link #isChecked()} - Whether the source is checked.</li> 203 * <li>{@link #getFromIndex()} - The text change start index.</li> 204 * <li>{@link #getAddedCount()} - The number of added characters.</li> 205 * <li>{@link #getRemovedCount()} - The number of removed characters.</li> 206 * <li>{@link #getBeforeText()} - The text of the source before the change.</li> 207 * <li>{@link #getContentDescription()} - The content description of the source.</li> 208 * </ul> 209 * </p> 210 * <p> 211 * <b>View text selection changed</b> - represents the event of changing the text 212 * selection of an {@link android.widget.EditText}.</br> 213 * <em>Type:</em> {@link #TYPE_VIEW_TEXT_SELECTION_CHANGED} </br> 214 * <em>Properties:</em></br> 215 * <ul> 216 * <li>{@link #getEventType()} - The type of the event.</li> 217 * <li>{@link #getSource()} - The source info (for registered clients).</li> 218 * <li>{@link #getClassName()} - The class name of the source.</li> 219 * <li>{@link #getPackageName()} - The package name of the source.</li> 220 * <li>{@link #getEventTime()} - The event time.</li> 221 * <li>{@link #getText()} - The text of the source.</li> 222 * <li>{@link #isPassword()} - Whether the source is password.</li> 223 * <li>{@link #getFromIndex()} - The selection start index.</li> 224 * <li>{@link #getToIndex()} - The selection end index.</li> 225 * <li>{@link #getItemCount()} - The length of the source text.</li> 226 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 227 * <li>{@link #getContentDescription()} - The content description of the source.</li> 228 * </ul> 229 * </p> 230 * <b>View text traversed at movement granularity</b> - represents the event of traversing the 231 * text of a view at a given granularity. For example, moving to the next word.</br> 232 * <em>Type:</em> {@link #TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY} </br> 233 * <em>Properties:</em></br> 234 * <ul> 235 * <li>{@link #getEventType()} - The type of the event.</li> 236 * <li>{@link #getSource()} - The source info (for registered clients).</li> 237 * <li>{@link #getClassName()} - The class name of the source.</li> 238 * <li>{@link #getPackageName()} - The package name of the source.</li> 239 * <li>{@link #getEventTime()} - The event time.</li> 240 * <li>{@link #getMovementGranularity()} - Sets the granularity at which a view's text 241 * was traversed.</li> 242 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 243 * <li>{@link #getFromIndex()} - The start of the next/previous text at the specified granularity 244 * - inclusive.</li> 245 * <li>{@link #getToIndex()} - The end of the next/previous text at the specified granularity 246 * - exclusive.</li> 247 * <li>{@link #isPassword()} - Whether the source is password.</li> 248 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 249 * <li>{@link #getContentDescription()} - The content description of the source.</li> 250 * <li>{@link #getMovementGranularity()} - Sets the granularity at which a view's text 251 * was traversed.</li> 252 * <li>{@link #getAction()} - Gets traversal action which specifies the direction.</li> 253 * </ul> 254 * </p> 255 * <p> 256 * <b>View scrolled</b> - represents the event of scrolling a view. If 257 * the source is a descendant of {@link android.widget.AdapterView} the 258 * scroll is reported in terms of visible items - the first visible item, 259 * the last visible item, and the total items - because the the source 260 * is unaware of its pixel size since its adapter is responsible for 261 * creating views. In all other cases the scroll is reported as the current 262 * scroll on the X and Y axis respectively plus the height of the source in 263 * pixels.</br> 264 * <em>Type:</em> {@link #TYPE_VIEW_SCROLLED}</br> 265 * <em>Properties:</em></br> 266 * <ul> 267 * <li>{@link #getEventType()} - The type of the event.</li> 268 * <li>{@link #getSource()} - The source info (for registered clients).</li> 269 * <li>{@link #getClassName()} - The class name of the source.</li> 270 * <li>{@link #getPackageName()} - The package name of the source.</li> 271 * <li>{@link #getEventTime()} - The event time.</li> 272 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 273 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 274 * <li>{@link #getContentDescription()} - The content description of the source.</li> 275 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 276 * (without descendants of AdapterView).</li> 277 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 278 * (without descendants of AdapterView).</li> 279 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 280 * inclusive (for descendants of AdapterView).</li> 281 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 282 * inclusive (for descendants of AdapterView).</li> 283 * <li>{@link #getItemCount()} - The total items of the source 284 * (for descendants of AdapterView).</li> 285 * </ul> 286 * <em>Note:</em> This event type is not dispatched to descendants though 287 * {@link android.view.View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 288 * View.dispatchPopulateAccessibilityEvent(AccessibilityEvent)}, hence the event 289 * source {@link android.view.View} and the sub-tree rooted at it will not receive 290 * calls to {@link android.view.View#onPopulateAccessibilityEvent(AccessibilityEvent) 291 * View.onPopulateAccessibilityEvent(AccessibilityEvent)}. The preferred way to add 292 * text content to such events is by setting the 293 * {@link android.R.styleable#View_contentDescription contentDescription} of the source 294 * view.</br> 295 * </p> 296 * <p> 297 * <b>TRANSITION TYPES</b></br> 298 * </p> 299 * <p> 300 * <b>Window state changed</b> - represents the event of opening a 301 * {@link android.widget.PopupWindow}, {@link android.view.Menu}, 302 * {@link android.app.Dialog}, etc.</br> 303 * <em>Type:</em> {@link #TYPE_WINDOW_STATE_CHANGED}</br> 304 * <em>Properties:</em></br> 305 * <ul> 306 * <li>{@link #getEventType()} - The type of the event.</li> 307 * <li>{@link #getSource()} - The source info (for registered clients).</li> 308 * <li>{@link #getClassName()} - The class name of the source.</li> 309 * <li>{@link #getPackageName()} - The package name of the source.</li> 310 * <li>{@link #getEventTime()} - The event time.</li> 311 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 312 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 313 * </ul> 314 * </p> 315 * <p> 316 * <b>Window content changed</b> - represents the event of change in the 317 * content of a window. This change can be adding/removing view, changing 318 * a view size, etc.</br> 319 * </p> 320 * <p> 321 * <strong>Note:</strong> This event is fired only for the window source of the 322 * last accessibility event different from {@link #TYPE_NOTIFICATION_STATE_CHANGED} 323 * and its purpose is to notify clients that the content of the user interaction 324 * window has changed.</br> 325 * <em>Type:</em> {@link #TYPE_WINDOW_CONTENT_CHANGED}</br> 326 * <em>Properties:</em></br> 327 * <ul> 328 * <li>{@link #getEventType()} - The type of the event.</li> 329 * <li>{@link #getContentChangeType()} - The type of content change.</li> 330 * <li>{@link #getSource()} - The source info (for registered clients).</li> 331 * <li>{@link #getClassName()} - The class name of the source.</li> 332 * <li>{@link #getPackageName()} - The package name of the source.</li> 333 * <li>{@link #getEventTime()} - The event time.</li> 334 * </ul> 335 * <em>Note:</em> This event type is not dispatched to descendants though 336 * {@link android.view.View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 337 * View.dispatchPopulateAccessibilityEvent(AccessibilityEvent)}, hence the event 338 * source {@link android.view.View} and the sub-tree rooted at it will not receive 339 * calls to {@link android.view.View#onPopulateAccessibilityEvent(AccessibilityEvent) 340 * View.onPopulateAccessibilityEvent(AccessibilityEvent)}. The preferred way to add 341 * text content to such events is by setting the 342 * {@link android.R.styleable#View_contentDescription contentDescription} of the source 343 * view.</br> 344 * </p> 345 * <p> 346 * <b>NOTIFICATION TYPES</b></br> 347 * </p> 348 * <p> 349 * <b>Notification state changed</b> - represents the event showing 350 * {@link android.app.Notification}.</br> 351 * <em>Type:</em> {@link #TYPE_NOTIFICATION_STATE_CHANGED}</br> 352 * <em>Properties:</em></br> 353 * <ul> 354 * <li>{@link #getEventType()} - The type of the event.</li> 355 * <li>{@link #getClassName()} - The class name of the source.</li> 356 * <li>{@link #getPackageName()} - The package name of the source.</li> 357 * <li>{@link #getEventTime()} - The event time.</li> 358 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 359 * <li>{@link #getParcelableData()} - The posted {@link android.app.Notification}.</li> 360 * <li>{@link #getText()} - Text for providing more context.</li> 361 * </ul> 362 * <em>Note:</em> This event type is not dispatched to descendants though 363 * {@link android.view.View#dispatchPopulateAccessibilityEvent(AccessibilityEvent) 364 * View.dispatchPopulateAccessibilityEvent(AccessibilityEvent)}, hence the event 365 * source {@link android.view.View} and the sub-tree rooted at it will not receive 366 * calls to {@link android.view.View#onPopulateAccessibilityEvent(AccessibilityEvent) 367 * View.onPopulateAccessibilityEvent(AccessibilityEvent)}. The preferred way to add 368 * text content to such events is by setting the 369 * {@link android.R.styleable#View_contentDescription contentDescription} of the source 370 * view.</br> 371 * </p> 372 * <p> 373 * <b>EXPLORATION TYPES</b></br> 374 * </p> 375 * <p> 376 * <b>View hover enter</b> - represents the event of beginning to hover 377 * over a {@link android.view.View}. The hover may be generated via 378 * exploring the screen by touch or via a pointing device.</br> 379 * <em>Type:</em> {@link #TYPE_VIEW_HOVER_ENTER}</br> 380 * <em>Properties:</em></br> 381 * <ul> 382 * <li>{@link #getEventType()} - The type of the event.</li> 383 * <li>{@link #getSource()} - The source info (for registered clients).</li> 384 * <li>{@link #getClassName()} - The class name of the source.</li> 385 * <li>{@link #getPackageName()} - The package name of the source.</li> 386 * <li>{@link #getEventTime()} - The event time.</li> 387 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 388 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 389 * <li>{@link #getContentDescription()} - The content description of the source.</li> 390 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 391 * (without descendants of AdapterView).</li> 392 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 393 * (without descendants of AdapterView).</li> 394 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 395 * inclusive (for descendants of AdapterView).</li> 396 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 397 * inclusive (for descendants of AdapterView).</li> 398 * <li>{@link #getItemCount()} - The total items of the source 399 * (for descendants of AdapterView).</li> 400 * </ul> 401 * </p> 402 * <b>View hover exit</b> - represents the event of stopping to hover 403 * over a {@link android.view.View}. The hover may be generated via 404 * exploring the screen by touch or via a pointing device.</br> 405 * <em>Type:</em> {@link #TYPE_VIEW_HOVER_EXIT}</br> 406 * <em>Properties:</em></br> 407 * <ul> 408 * <li>{@link #getEventType()} - The type of the event.</li> 409 * <li>{@link #getSource()} - The source info (for registered clients).</li> 410 * <li>{@link #getClassName()} - The class name of the source.</li> 411 * <li>{@link #getPackageName()} - The package name of the source.</li> 412 * <li>{@link #getEventTime()} - The event time.</li> 413 * <li>{@link #getText()} - The text of the source's sub-tree.</li> 414 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 415 * <li>{@link #getContentDescription()} - The content description of the source.</li> 416 * <li>{@link #getScrollX()} - The offset of the source left edge in pixels 417 * (without descendants of AdapterView).</li> 418 * <li>{@link #getScrollY()} - The offset of the source top edge in pixels 419 * (without descendants of AdapterView).</li> 420 * <li>{@link #getFromIndex()} - The zero based index of the first visible item of the source, 421 * inclusive (for descendants of AdapterView).</li> 422 * <li>{@link #getToIndex()} - The zero based index of the last visible item of the source, 423 * inclusive (for descendants of AdapterView).</li> 424 * <li>{@link #getItemCount()} - The total items of the source 425 * (for descendants of AdapterView).</li> 426 * </ul> 427 * </p> 428 * <p> 429 * <b>Touch interaction start</b> - represents the event of starting a touch 430 * interaction, which is the user starts touching the screen.</br> 431 * <em>Type:</em> {@link #TYPE_TOUCH_INTERACTION_START}</br> 432 * <em>Properties:</em></br> 433 * <ul> 434 * <li>{@link #getEventType()} - The type of the event.</li> 435 * </ul> 436 * <em>Note:</em> This event is fired only by the system and is not passed to the 437 * view tree to be populated.</br> 438 * </p> 439 * <p> 440 * <b>Touch interaction end</b> - represents the event of ending a touch 441 * interaction, which is the user stops touching the screen.</br> 442 * <em>Type:</em> {@link #TYPE_TOUCH_INTERACTION_END}</br> 443 * <em>Properties:</em></br> 444 * <ul> 445 * <li>{@link #getEventType()} - The type of the event.</li> 446 * </ul> 447 * <em>Note:</em> This event is fired only by the system and is not passed to the 448 * view tree to be populated.</br> 449 * </p> 450 * <p> 451 * <b>Touch exploration gesture start</b> - represents the event of starting a touch 452 * exploring gesture.</br> 453 * <em>Type:</em> {@link #TYPE_TOUCH_EXPLORATION_GESTURE_START}</br> 454 * <em>Properties:</em></br> 455 * <ul> 456 * <li>{@link #getEventType()} - The type of the event.</li> 457 * </ul> 458 * <em>Note:</em> This event is fired only by the system and is not passed to the 459 * view tree to be populated.</br> 460 * </p> 461 * <p> 462 * <b>Touch exploration gesture end</b> - represents the event of ending a touch 463 * exploring gesture.</br> 464 * <em>Type:</em> {@link #TYPE_TOUCH_EXPLORATION_GESTURE_END}</br> 465 * <em>Properties:</em></br> 466 * <ul> 467 * <li>{@link #getEventType()} - The type of the event.</li> 468 * </ul> 469 * <em>Note:</em> This event is fired only by the system and is not passed to the 470 * view tree to be populated.</br> 471 * </p> 472 * <p> 473 * <b>Touch gesture detection start</b> - represents the event of starting a user 474 * gesture detection.</br> 475 * <em>Type:</em> {@link #TYPE_GESTURE_DETECTION_START}</br> 476 * <em>Properties:</em></br> 477 * <ul> 478 * <li>{@link #getEventType()} - The type of the event.</li> 479 * </ul> 480 * <em>Note:</em> This event is fired only by the system and is not passed to the 481 * view tree to be populated.</br> 482 * </p> 483 * <p> 484 * <b>Touch gesture detection end</b> - represents the event of ending a user 485 * gesture detection.</br> 486 * <em>Type:</em> {@link #TYPE_GESTURE_DETECTION_END}</br> 487 * <em>Properties:</em></br> 488 * <ul> 489 * <li>{@link #getEventType()} - The type of the event.</li> 490 * </ul> 491 * <em>Note:</em> This event is fired only by the system and is not passed to the 492 * view tree to be populated.</br> 493 * </p> 494 * <p> 495 * <b>MISCELLANEOUS TYPES</b></br> 496 * </p> 497 * <p> 498 * <b>Announcement</b> - represents the event of an application making an 499 * announcement. Usually this announcement is related to some sort of a context 500 * change for which none of the events representing UI transitions is a good fit. 501 * For example, announcing a new page in a book.</br> 502 * <em>Type:</em> {@link #TYPE_ANNOUNCEMENT}</br> 503 * <em>Properties:</em></br> 504 * <ul> 505 * <li>{@link #getEventType()} - The type of the event.</li> 506 * <li>{@link #getSource()} - The source info (for registered clients).</li> 507 * <li>{@link #getClassName()} - The class name of the source.</li> 508 * <li>{@link #getPackageName()} - The package name of the source.</li> 509 * <li>{@link #getEventTime()} - The event time.</li> 510 * <li>{@link #getText()} - The text of the announcement.</li> 511 * <li>{@link #isEnabled()} - Whether the source is enabled.</li> 512 * </ul> 513 * </p> 514 * <p> 515 * <b>Security note</b> 516 * <p> 517 * Since an event contains the text of its source privacy can be compromised by leaking 518 * sensitive information such as passwords. To address this issue any event fired in response 519 * to manipulation of a PASSWORD field does NOT CONTAIN the text of the password. 520 * </p> 521 * 522 * @see android.view.accessibility.AccessibilityManager 523 * @see android.accessibilityservice.AccessibilityService 524 * @see AccessibilityNodeInfo 525 */ 526public final class AccessibilityEvent extends AccessibilityRecord implements Parcelable { 527 private static final boolean DEBUG = false; 528 529 /** 530 * Invalid selection/focus position. 531 * 532 * @see #getCurrentItemIndex() 533 */ 534 public static final int INVALID_POSITION = -1; 535 536 /** 537 * Maximum length of the text fields. 538 * 539 * @see #getBeforeText() 540 * @see #getText() 541 * </br> 542 * Note: This constant is no longer needed since there 543 * is no limit on the length of text that is contained 544 * in an accessibility event anymore. 545 */ 546 @Deprecated 547 public static final int MAX_TEXT_LENGTH = 500; 548 549 /** 550 * Represents the event of clicking on a {@link android.view.View} like 551 * {@link android.widget.Button}, {@link android.widget.CompoundButton}, etc. 552 */ 553 public static final int TYPE_VIEW_CLICKED = 0x00000001; 554 555 /** 556 * Represents the event of long clicking on a {@link android.view.View} like 557 * {@link android.widget.Button}, {@link android.widget.CompoundButton}, etc. 558 */ 559 public static final int TYPE_VIEW_LONG_CLICKED = 0x00000002; 560 561 /** 562 * Represents the event of selecting an item usually in the context of an 563 * {@link android.widget.AdapterView}. 564 */ 565 public static final int TYPE_VIEW_SELECTED = 0x00000004; 566 567 /** 568 * Represents the event of setting input focus of a {@link android.view.View}. 569 */ 570 public static final int TYPE_VIEW_FOCUSED = 0x00000008; 571 572 /** 573 * Represents the event of changing the text of an {@link android.widget.EditText}. 574 */ 575 public static final int TYPE_VIEW_TEXT_CHANGED = 0x00000010; 576 577 /** 578 * Represents the event of opening a {@link android.widget.PopupWindow}, 579 * {@link android.view.Menu}, {@link android.app.Dialog}, etc. 580 */ 581 public static final int TYPE_WINDOW_STATE_CHANGED = 0x00000020; 582 583 /** 584 * Represents the event showing a {@link android.app.Notification}. 585 */ 586 public static final int TYPE_NOTIFICATION_STATE_CHANGED = 0x00000040; 587 588 /** 589 * Represents the event of a hover enter over a {@link android.view.View}. 590 */ 591 public static final int TYPE_VIEW_HOVER_ENTER = 0x00000080; 592 593 /** 594 * Represents the event of a hover exit over a {@link android.view.View}. 595 */ 596 public static final int TYPE_VIEW_HOVER_EXIT = 0x00000100; 597 598 /** 599 * Represents the event of starting a touch exploration gesture. 600 */ 601 public static final int TYPE_TOUCH_EXPLORATION_GESTURE_START = 0x00000200; 602 603 /** 604 * Represents the event of ending a touch exploration gesture. 605 */ 606 public static final int TYPE_TOUCH_EXPLORATION_GESTURE_END = 0x00000400; 607 608 /** 609 * Represents the event of changing the content of a window and more 610 * specifically the sub-tree rooted at the event's source. 611 */ 612 public static final int TYPE_WINDOW_CONTENT_CHANGED = 0x00000800; 613 614 /** 615 * Represents the event of scrolling a view. 616 */ 617 public static final int TYPE_VIEW_SCROLLED = 0x00001000; 618 619 /** 620 * Represents the event of changing the selection in an {@link android.widget.EditText}. 621 */ 622 public static final int TYPE_VIEW_TEXT_SELECTION_CHANGED = 0x00002000; 623 624 /** 625 * Represents the event of an application making an announcement. 626 */ 627 public static final int TYPE_ANNOUNCEMENT = 0x00004000; 628 629 /** 630 * Represents the event of gaining accessibility focus. 631 */ 632 public static final int TYPE_VIEW_ACCESSIBILITY_FOCUSED = 0x00008000; 633 634 /** 635 * Represents the event of clearing accessibility focus. 636 */ 637 public static final int TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED = 0x00010000; 638 639 /** 640 * Represents the event of traversing the text of a view at a given movement granularity. 641 */ 642 public static final int TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY = 0x00020000; 643 644 /** 645 * Represents the event of beginning gesture detection. 646 */ 647 public static final int TYPE_GESTURE_DETECTION_START = 0x00040000; 648 649 /** 650 * Represents the event of ending gesture detection. 651 */ 652 public static final int TYPE_GESTURE_DETECTION_END = 0x00080000; 653 654 /** 655 * Represents the event of the user starting to touch the screen. 656 */ 657 public static final int TYPE_TOUCH_INTERACTION_START = 0x00100000; 658 659 /** 660 * Represents the event of the user ending to touch the screen. 661 */ 662 public static final int TYPE_TOUCH_INTERACTION_END = 0x00200000; 663 664 /** 665 * Change type for {@link #TYPE_WINDOW_CONTENT_CHANGED} event: 666 * The subtree rooted at the source node changed. 667 */ 668 public static final int CONTENT_CHANGE_TYPE_SUBTREE = 0; 669 670 /** 671 * Change type for {@link #TYPE_WINDOW_CONTENT_CHANGED} event: 672 * Only the source node changed. 673 */ 674 public static final int CONTENT_CHANGE_TYPE_NODE = 1; 675 676 /** 677 * Mask for {@link AccessibilityEvent} all types. 678 * 679 * @see #TYPE_VIEW_CLICKED 680 * @see #TYPE_VIEW_LONG_CLICKED 681 * @see #TYPE_VIEW_SELECTED 682 * @see #TYPE_VIEW_FOCUSED 683 * @see #TYPE_VIEW_TEXT_CHANGED 684 * @see #TYPE_WINDOW_STATE_CHANGED 685 * @see #TYPE_NOTIFICATION_STATE_CHANGED 686 * @see #TYPE_VIEW_HOVER_ENTER 687 * @see #TYPE_VIEW_HOVER_EXIT 688 * @see #TYPE_TOUCH_EXPLORATION_GESTURE_START 689 * @see #TYPE_TOUCH_EXPLORATION_GESTURE_END 690 * @see #TYPE_WINDOW_CONTENT_CHANGED 691 * @see #TYPE_VIEW_SCROLLED 692 * @see #TYPE_VIEW_TEXT_SELECTION_CHANGED 693 * @see #TYPE_ANNOUNCEMENT 694 * @see #TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY 695 * @see #TYPE_GESTURE_DETECTION_START 696 * @see #TYPE_GESTURE_DETECTION_END 697 * @see #TYPE_TOUCH_INTERACTION_START 698 * @see #TYPE_TOUCH_INTERACTION_END 699 */ 700 public static final int TYPES_ALL_MASK = 0xFFFFFFFF; 701 702 private static final int MAX_POOL_SIZE = 10; 703 private static final SynchronizedPool<AccessibilityEvent> sPool = 704 new SynchronizedPool<AccessibilityEvent>(MAX_POOL_SIZE); 705 706 private int mEventType; 707 private CharSequence mPackageName; 708 private long mEventTime; 709 int mMovementGranularity; 710 int mAction; 711 int mContentChangeType; 712 713 private final ArrayList<AccessibilityRecord> mRecords = new ArrayList<AccessibilityRecord>(); 714 715 /* 716 * Hide constructor from clients. 717 */ 718 private AccessibilityEvent() { 719 } 720 721 /** 722 * Initialize an event from another one. 723 * 724 * @param event The event to initialize from. 725 */ 726 void init(AccessibilityEvent event) { 727 super.init(event); 728 mEventType = event.mEventType; 729 mMovementGranularity = event.mMovementGranularity; 730 mAction = event.mAction; 731 mContentChangeType = event.mContentChangeType; 732 mEventTime = event.mEventTime; 733 mPackageName = event.mPackageName; 734 } 735 736 /** 737 * Sets if this instance is sealed. 738 * 739 * @param sealed Whether is sealed. 740 * 741 * @hide 742 */ 743 @Override 744 public void setSealed(boolean sealed) { 745 super.setSealed(sealed); 746 List<AccessibilityRecord> records = mRecords; 747 final int recordCount = records.size(); 748 for (int i = 0; i < recordCount; i++) { 749 AccessibilityRecord record = records.get(i); 750 record.setSealed(sealed); 751 } 752 } 753 754 /** 755 * Gets the number of records contained in the event. 756 * 757 * @return The number of records. 758 */ 759 public int getRecordCount() { 760 return mRecords.size(); 761 } 762 763 /** 764 * Appends an {@link AccessibilityRecord} to the end of event records. 765 * 766 * @param record The record to append. 767 * 768 * @throws IllegalStateException If called from an AccessibilityService. 769 */ 770 public void appendRecord(AccessibilityRecord record) { 771 enforceNotSealed(); 772 mRecords.add(record); 773 } 774 775 /** 776 * Gets the record at a given index. 777 * 778 * @param index The index. 779 * @return The record at the specified index. 780 */ 781 public AccessibilityRecord getRecord(int index) { 782 return mRecords.get(index); 783 } 784 785 /** 786 * Gets the event type. 787 * 788 * @return The event type. 789 */ 790 public int getEventType() { 791 return mEventType; 792 } 793 794 /** 795 * Gets the type of node tree change signaled by an 796 * {@link #TYPE_WINDOW_CONTENT_CHANGED} event. 797 * 798 * @see #CONTENT_CHANGE_TYPE_NODE 799 * @see #CONTENT_CHANGE_TYPE_SUBTREE 800 * 801 * @return The change type. 802 */ 803 public int getContentChangeType() { 804 return mContentChangeType; 805 } 806 807 /** 808 * Sets the type of node tree change signaled by an 809 * {@link #TYPE_WINDOW_CONTENT_CHANGED} event. 810 * 811 * @see #CONTENT_CHANGE_TYPE_NODE 812 * @see #CONTENT_CHANGE_TYPE_SUBTREE 813 * 814 * @param changeType The change type. 815 */ 816 public void setContentChangeType(int changeType) { 817 enforceNotSealed(); 818 mContentChangeType = changeType; 819 } 820 821 /** 822 * Sets the event type. 823 * 824 * @param eventType The event type. 825 * 826 * @throws IllegalStateException If called from an AccessibilityService. 827 */ 828 public void setEventType(int eventType) { 829 enforceNotSealed(); 830 mEventType = eventType; 831 } 832 833 /** 834 * Gets the time in which this event was sent. 835 * 836 * @return The event time. 837 */ 838 public long getEventTime() { 839 return mEventTime; 840 } 841 842 /** 843 * Sets the time in which this event was sent. 844 * 845 * @param eventTime The event time. 846 * 847 * @throws IllegalStateException If called from an AccessibilityService. 848 */ 849 public void setEventTime(long eventTime) { 850 enforceNotSealed(); 851 mEventTime = eventTime; 852 } 853 854 /** 855 * Gets the package name of the source. 856 * 857 * @return The package name. 858 */ 859 public CharSequence getPackageName() { 860 return mPackageName; 861 } 862 863 /** 864 * Sets the package name of the source. 865 * 866 * @param packageName The package name. 867 * 868 * @throws IllegalStateException If called from an AccessibilityService. 869 */ 870 public void setPackageName(CharSequence packageName) { 871 enforceNotSealed(); 872 mPackageName = packageName; 873 } 874 875 /** 876 * Sets the movement granularity that was traversed. 877 * 878 * @param granularity The granularity. 879 * 880 * @throws IllegalStateException If called from an AccessibilityService. 881 */ 882 public void setMovementGranularity(int granularity) { 883 enforceNotSealed(); 884 mMovementGranularity = granularity; 885 } 886 887 /** 888 * Gets the movement granularity that was traversed. 889 * 890 * @return The granularity. 891 */ 892 public int getMovementGranularity() { 893 return mMovementGranularity; 894 } 895 896 /** 897 * Sets the performed action that triggered this event. 898 * 899 * @param action The action. 900 * 901 * @throws IllegalStateException If called from an AccessibilityService. 902 */ 903 public void setAction(int action) { 904 enforceNotSealed(); 905 mAction = action; 906 } 907 908 /** 909 * Gets the performed action that triggered this event. 910 * 911 * @return The action. 912 */ 913 public int getAction() { 914 return mAction; 915 } 916 917 /** 918 * Returns a cached instance if such is available or a new one is 919 * instantiated with its type property set. 920 * 921 * @param eventType The event type. 922 * @return An instance. 923 */ 924 public static AccessibilityEvent obtain(int eventType) { 925 AccessibilityEvent event = AccessibilityEvent.obtain(); 926 event.setEventType(eventType); 927 return event; 928 } 929 930 /** 931 * Returns a cached instance if such is available or a new one is 932 * created. The returned instance is initialized from the given 933 * <code>event</code>. 934 * 935 * @param event The other event. 936 * @return An instance. 937 */ 938 public static AccessibilityEvent obtain(AccessibilityEvent event) { 939 AccessibilityEvent eventClone = AccessibilityEvent.obtain(); 940 eventClone.init(event); 941 942 final int recordCount = event.mRecords.size(); 943 for (int i = 0; i < recordCount; i++) { 944 AccessibilityRecord record = event.mRecords.get(i); 945 AccessibilityRecord recordClone = AccessibilityRecord.obtain(record); 946 eventClone.mRecords.add(recordClone); 947 } 948 949 return eventClone; 950 } 951 952 /** 953 * Returns a cached instance if such is available or a new one is 954 * instantiated. 955 * 956 * @return An instance. 957 */ 958 public static AccessibilityEvent obtain() { 959 AccessibilityEvent event = sPool.acquire(); 960 return (event != null) ? event : new AccessibilityEvent(); 961 } 962 963 /** 964 * Recycles an instance back to be reused. 965 * <p> 966 * <b>Note: You must not touch the object after calling this function.</b> 967 * </p> 968 * 969 * @throws IllegalStateException If the event is already recycled. 970 */ 971 @Override 972 public void recycle() { 973 clear(); 974 sPool.release(this); 975 } 976 977 /** 978 * Clears the state of this instance. 979 * 980 * @hide 981 */ 982 @Override 983 protected void clear() { 984 super.clear(); 985 mEventType = 0; 986 mMovementGranularity = 0; 987 mAction = 0; 988 mContentChangeType = 0; 989 mPackageName = null; 990 mEventTime = 0; 991 while (!mRecords.isEmpty()) { 992 AccessibilityRecord record = mRecords.remove(0); 993 record.recycle(); 994 } 995 } 996 997 /** 998 * Creates a new instance from a {@link Parcel}. 999 * 1000 * @param parcel A parcel containing the state of a {@link AccessibilityEvent}. 1001 */ 1002 public void initFromParcel(Parcel parcel) { 1003 mSealed = (parcel.readInt() == 1); 1004 mEventType = parcel.readInt(); 1005 mMovementGranularity = parcel.readInt(); 1006 mAction = parcel.readInt(); 1007 mContentChangeType = parcel.readInt(); 1008 mPackageName = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel); 1009 mEventTime = parcel.readLong(); 1010 mConnectionId = parcel.readInt(); 1011 readAccessibilityRecordFromParcel(this, parcel); 1012 1013 // Read the records. 1014 final int recordCount = parcel.readInt(); 1015 for (int i = 0; i < recordCount; i++) { 1016 AccessibilityRecord record = AccessibilityRecord.obtain(); 1017 readAccessibilityRecordFromParcel(record, parcel); 1018 record.mConnectionId = mConnectionId; 1019 mRecords.add(record); 1020 } 1021 } 1022 1023 /** 1024 * Reads an {@link AccessibilityRecord} from a parcel. 1025 * 1026 * @param record The record to initialize. 1027 * @param parcel The parcel to read from. 1028 */ 1029 private void readAccessibilityRecordFromParcel(AccessibilityRecord record, 1030 Parcel parcel) { 1031 record.mBooleanProperties = parcel.readInt(); 1032 record.mCurrentItemIndex = parcel.readInt(); 1033 record.mItemCount = parcel.readInt(); 1034 record.mFromIndex = parcel.readInt(); 1035 record.mToIndex = parcel.readInt(); 1036 record.mScrollX = parcel.readInt(); 1037 record.mScrollY = parcel.readInt(); 1038 record.mMaxScrollX = parcel.readInt(); 1039 record.mMaxScrollY = parcel.readInt(); 1040 record.mAddedCount = parcel.readInt(); 1041 record.mRemovedCount = parcel.readInt(); 1042 record.mClassName = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel); 1043 record.mContentDescription = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel); 1044 record.mBeforeText = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel); 1045 record.mParcelableData = parcel.readParcelable(null); 1046 parcel.readList(record.mText, null); 1047 record.mSourceWindowId = parcel.readInt(); 1048 record.mSourceNodeId = parcel.readLong(); 1049 record.mSealed = (parcel.readInt() == 1); 1050 } 1051 1052 /** 1053 * {@inheritDoc} 1054 */ 1055 public void writeToParcel(Parcel parcel, int flags) { 1056 parcel.writeInt(isSealed() ? 1 : 0); 1057 parcel.writeInt(mEventType); 1058 parcel.writeInt(mMovementGranularity); 1059 parcel.writeInt(mAction); 1060 parcel.writeInt(mContentChangeType); 1061 TextUtils.writeToParcel(mPackageName, parcel, 0); 1062 parcel.writeLong(mEventTime); 1063 parcel.writeInt(mConnectionId); 1064 writeAccessibilityRecordToParcel(this, parcel, flags); 1065 1066 // Write the records. 1067 final int recordCount = getRecordCount(); 1068 parcel.writeInt(recordCount); 1069 for (int i = 0; i < recordCount; i++) { 1070 AccessibilityRecord record = mRecords.get(i); 1071 writeAccessibilityRecordToParcel(record, parcel, flags); 1072 } 1073 } 1074 1075 /** 1076 * Writes an {@link AccessibilityRecord} to a parcel. 1077 * 1078 * @param record The record to write. 1079 * @param parcel The parcel to which to write. 1080 */ 1081 private void writeAccessibilityRecordToParcel(AccessibilityRecord record, Parcel parcel, 1082 int flags) { 1083 parcel.writeInt(record.mBooleanProperties); 1084 parcel.writeInt(record.mCurrentItemIndex); 1085 parcel.writeInt(record.mItemCount); 1086 parcel.writeInt(record.mFromIndex); 1087 parcel.writeInt(record.mToIndex); 1088 parcel.writeInt(record.mScrollX); 1089 parcel.writeInt(record.mScrollY); 1090 parcel.writeInt(record.mMaxScrollX); 1091 parcel.writeInt(record.mMaxScrollY); 1092 parcel.writeInt(record.mAddedCount); 1093 parcel.writeInt(record.mRemovedCount); 1094 TextUtils.writeToParcel(record.mClassName, parcel, flags); 1095 TextUtils.writeToParcel(record.mContentDescription, parcel, flags); 1096 TextUtils.writeToParcel(record.mBeforeText, parcel, flags); 1097 parcel.writeParcelable(record.mParcelableData, flags); 1098 parcel.writeList(record.mText); 1099 parcel.writeInt(record.mSourceWindowId); 1100 parcel.writeLong(record.mSourceNodeId); 1101 parcel.writeInt(record.mSealed ? 1 : 0); 1102 } 1103 1104 /** 1105 * {@inheritDoc} 1106 */ 1107 public int describeContents() { 1108 return 0; 1109 } 1110 1111 @Override 1112 public String toString() { 1113 StringBuilder builder = new StringBuilder(); 1114 builder.append("EventType: ").append(eventTypeToString(mEventType)); 1115 builder.append("; EventTime: ").append(mEventTime); 1116 builder.append("; PackageName: ").append(mPackageName); 1117 builder.append("; MovementGranularity: ").append(mMovementGranularity); 1118 builder.append("; Action: ").append(mAction); 1119 builder.append(super.toString()); 1120 if (DEBUG) { 1121 builder.append("\n"); 1122 builder.append("; ContentChangeType: ").append(mContentChangeType); 1123 builder.append("; sourceWindowId: ").append(mSourceWindowId); 1124 builder.append("; mSourceNodeId: ").append(mSourceNodeId); 1125 for (int i = 0; i < mRecords.size(); i++) { 1126 AccessibilityRecord record = mRecords.get(i); 1127 builder.append(" Record "); 1128 builder.append(i); 1129 builder.append(":"); 1130 builder.append(" [ ClassName: " + record.mClassName); 1131 builder.append("; Text: " + record.mText); 1132 builder.append("; ContentDescription: " + record.mContentDescription); 1133 builder.append("; ItemCount: " + record.mItemCount); 1134 builder.append("; CurrentItemIndex: " + record.mCurrentItemIndex); 1135 builder.append("; IsEnabled: " + record.isEnabled()); 1136 builder.append("; IsPassword: " + record.isPassword()); 1137 builder.append("; IsChecked: " + record.isChecked()); 1138 builder.append("; IsFullScreen: " + record.isFullScreen()); 1139 builder.append("; Scrollable: " + record.isScrollable()); 1140 builder.append("; BeforeText: " + record.mBeforeText); 1141 builder.append("; FromIndex: " + record.mFromIndex); 1142 builder.append("; ToIndex: " + record.mToIndex); 1143 builder.append("; ScrollX: " + record.mScrollX); 1144 builder.append("; ScrollY: " + record.mScrollY); 1145 builder.append("; AddedCount: " + record.mAddedCount); 1146 builder.append("; RemovedCount: " + record.mRemovedCount); 1147 builder.append("; ParcelableData: " + record.mParcelableData); 1148 builder.append(" ]"); 1149 builder.append("\n"); 1150 } 1151 } else { 1152 builder.append("; recordCount: ").append(getRecordCount()); 1153 } 1154 return builder.toString(); 1155 } 1156 1157 /** 1158 * Returns the string representation of an event type. For example, 1159 * {@link #TYPE_VIEW_CLICKED} is represented by the string TYPE_VIEW_CLICKED. 1160 * 1161 * @param eventType The event type 1162 * @return The string representation. 1163 */ 1164 public static String eventTypeToString(int eventType) { 1165 if (eventType == TYPES_ALL_MASK) { 1166 return "TYPES_ALL_MASK"; 1167 } 1168 StringBuilder builder = new StringBuilder(); 1169 int eventTypeCount = 0; 1170 while (eventType != 0) { 1171 final int eventTypeFlag = 1 << Integer.numberOfTrailingZeros(eventType); 1172 eventType &= ~eventTypeFlag; 1173 switch (eventTypeFlag) { 1174 case TYPE_VIEW_CLICKED: { 1175 if (eventTypeCount > 0) { 1176 builder.append(", "); 1177 } 1178 builder.append("TYPE_VIEW_CLICKED"); 1179 eventTypeCount++; 1180 } break; 1181 case TYPE_VIEW_LONG_CLICKED: { 1182 if (eventTypeCount > 0) { 1183 builder.append(", "); 1184 } 1185 builder.append("TYPE_VIEW_LONG_CLICKED"); 1186 eventTypeCount++; 1187 } break; 1188 case TYPE_VIEW_SELECTED: { 1189 if (eventTypeCount > 0) { 1190 builder.append(", "); 1191 } 1192 builder.append("TYPE_VIEW_SELECTED"); 1193 eventTypeCount++; 1194 } break; 1195 case TYPE_VIEW_FOCUSED: { 1196 if (eventTypeCount > 0) { 1197 builder.append(", "); 1198 } 1199 builder.append("TYPE_VIEW_FOCUSED"); 1200 eventTypeCount++; 1201 } break; 1202 case TYPE_VIEW_TEXT_CHANGED: { 1203 if (eventTypeCount > 0) { 1204 builder.append(", "); 1205 } 1206 builder.append("TYPE_VIEW_TEXT_CHANGED"); 1207 eventTypeCount++; 1208 } break; 1209 case TYPE_WINDOW_STATE_CHANGED: { 1210 if (eventTypeCount > 0) { 1211 builder.append(", "); 1212 } 1213 builder.append("TYPE_WINDOW_STATE_CHANGED"); 1214 eventTypeCount++; 1215 } break; 1216 case TYPE_VIEW_HOVER_ENTER: { 1217 if (eventTypeCount > 0) { 1218 builder.append(", "); 1219 } 1220 builder.append("TYPE_VIEW_HOVER_ENTER"); 1221 eventTypeCount++; 1222 } break; 1223 case TYPE_VIEW_HOVER_EXIT: { 1224 if (eventTypeCount > 0) { 1225 builder.append(", "); 1226 } 1227 builder.append("TYPE_VIEW_HOVER_EXIT"); 1228 eventTypeCount++; 1229 } break; 1230 case TYPE_NOTIFICATION_STATE_CHANGED: { 1231 if (eventTypeCount > 0) { 1232 builder.append(", "); 1233 } 1234 builder.append("TYPE_NOTIFICATION_STATE_CHANGED"); 1235 eventTypeCount++; 1236 } break; 1237 case TYPE_TOUCH_EXPLORATION_GESTURE_START: { 1238 if (eventTypeCount > 0) { 1239 builder.append(", "); 1240 } 1241 builder.append("TYPE_TOUCH_EXPLORATION_GESTURE_START"); 1242 eventTypeCount++; 1243 } break; 1244 case TYPE_TOUCH_EXPLORATION_GESTURE_END: { 1245 if (eventTypeCount > 0) { 1246 builder.append(", "); 1247 } 1248 builder.append("TYPE_TOUCH_EXPLORATION_GESTURE_END"); 1249 eventTypeCount++; 1250 } break; 1251 case TYPE_WINDOW_CONTENT_CHANGED: { 1252 if (eventTypeCount > 0) { 1253 builder.append(", "); 1254 } 1255 builder.append("TYPE_WINDOW_CONTENT_CHANGED"); 1256 eventTypeCount++; 1257 } break; 1258 case TYPE_VIEW_TEXT_SELECTION_CHANGED: { 1259 if (eventTypeCount > 0) { 1260 builder.append(", "); 1261 } 1262 builder.append("TYPE_VIEW_TEXT_SELECTION_CHANGED"); 1263 eventTypeCount++; 1264 } break; 1265 case TYPE_VIEW_SCROLLED: { 1266 if (eventTypeCount > 0) { 1267 builder.append(", "); 1268 } 1269 builder.append("TYPE_VIEW_SCROLLED"); 1270 eventTypeCount++; 1271 } break; 1272 case TYPE_ANNOUNCEMENT: { 1273 if (eventTypeCount > 0) { 1274 builder.append(", "); 1275 } 1276 builder.append("TYPE_ANNOUNCEMENT"); 1277 eventTypeCount++; 1278 } break; 1279 case TYPE_VIEW_ACCESSIBILITY_FOCUSED: { 1280 if (eventTypeCount > 0) { 1281 builder.append(", "); 1282 } 1283 builder.append("TYPE_VIEW_ACCESSIBILITY_FOCUSED"); 1284 eventTypeCount++; 1285 } break; 1286 case TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED: { 1287 if (eventTypeCount > 0) { 1288 builder.append(", "); 1289 } 1290 builder.append("TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED"); 1291 eventTypeCount++; 1292 } break; 1293 case TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY: { 1294 if (eventTypeCount > 0) { 1295 builder.append(", "); 1296 } 1297 builder.append("TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY"); 1298 eventTypeCount++; 1299 } break; 1300 case TYPE_GESTURE_DETECTION_START: { 1301 if (eventTypeCount > 0) { 1302 builder.append(", "); 1303 } 1304 builder.append("TYPE_GESTURE_DETECTION_START"); 1305 eventTypeCount++; 1306 } break; 1307 case TYPE_GESTURE_DETECTION_END: { 1308 if (eventTypeCount > 0) { 1309 builder.append(", "); 1310 } 1311 builder.append("TYPE_GESTURE_DETECTION_END"); 1312 eventTypeCount++; 1313 } break; 1314 case TYPE_TOUCH_INTERACTION_START: { 1315 if (eventTypeCount > 0) { 1316 builder.append(", "); 1317 } 1318 builder.append("TYPE_TOUCH_INTERACTION_START"); 1319 eventTypeCount++; 1320 } break; 1321 case TYPE_TOUCH_INTERACTION_END: { 1322 if (eventTypeCount > 0) { 1323 builder.append(", "); 1324 } 1325 builder.append("TYPE_TOUCH_INTERACTION_END"); 1326 eventTypeCount++; 1327 } break; 1328 } 1329 } 1330 if (eventTypeCount > 1) { 1331 builder.insert(0, '['); 1332 builder.append(']'); 1333 } 1334 return builder.toString(); 1335 } 1336 1337 /** 1338 * @see Parcelable.Creator 1339 */ 1340 public static final Parcelable.Creator<AccessibilityEvent> CREATOR = 1341 new Parcelable.Creator<AccessibilityEvent>() { 1342 public AccessibilityEvent createFromParcel(Parcel parcel) { 1343 AccessibilityEvent event = AccessibilityEvent.obtain(); 1344 event.initFromParcel(parcel); 1345 return event; 1346 } 1347 1348 public AccessibilityEvent[] newArray(int size) { 1349 return new AccessibilityEvent[size]; 1350 } 1351 }; 1352} 1353