老是要穿墙去看着官方文档真是麻烦死了，存在这里吧。顺便说一句，这blog做得太烂了，垃圾功能太多，老出问题、慢得要命、烦得要死，真是受不了
https://developer.android.com/reference/android/view/accessibility/AccessibilityEvent
|Java
public final class AccessibilityEventextends AccessibilityRecord implements Parcelable
| java.lang.Object | ||
| ↳ | android.view.accessibility.AccessibilityRecord | |
| ↳ | android.view.accessibility.AccessibilityEvent | |
This class represents accessibility events that are sent by the system when something notable happens in the user interface. For example, when a Button is clicked, a View is focused, etc.
An accessibility event is fired by an individual view which populates the event with data for its state and requests from its parent to send the event to interested parties. The parent can optionally modify or even block the event based on its broader understanding of the user interface's context.
The main purpose of an accessibility event is to communicate changes in the UI to an AccessibilityService. The service may then inspect, if needed the user interface by examining the View hierarchy, as represented by a tree of AccessibilityNodeInfos (snapshot of a View state) which can be used for exploring the window content. Note that the privilege for accessing an event's source, thus the window content, has to be explicitly requested. For more details refer to AccessibilityService. If an accessibility service has not requested to retrieve the window content the event will not contain reference to its source. Also for events of type TYPE_NOTIFICATION_STATE_CHANGED the source is never available.
This class represents various semantically different accessibility event types. Each event type has an associated set of related properties. In other words, each event type is characterized via a subset of the properties exposed by this class. For each event type there is a corresponding constant defined in this class. Follows a specification of the event types and their associated properties:
Developer Guides
For more information about creating and processing AccessibilityEvents, read the Accessibility developer guide.
VIEW TYPES
View clicked - represents the event of clicking on a View like Button, CompoundButton, etc.
Type:TYPE_VIEW_CLICKED
Properties:
getEventType()- The type of the event.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.
View long clicked - represents the event of long clicking on a View like Button, CompoundButton, etc
Type:TYPE_VIEW_LONG_CLICKED
Properties:
getEventType()- The type of the event.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.
View selected - represents the event of selecting an item usually in the context of an AdapterView.
Type: TYPE_VIEW_SELECTED
Properties:
getEventType()- The type of the event.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.
View focused - represents the event of focusing a View.
Type: TYPE_VIEW_FOCUSED
Properties:
getEventType()- The type of the event.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.
View text changed - represents the event of changing the text of an EditText.
Type: TYPE_VIEW_TEXT_CHANGED
Properties:
getEventType()- The type of the event.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.AccessibilityRecord.getText()- The new text of the source.AccessibilityRecord.getBeforeText()- The text of the source before the change.AccessibilityRecord.getFromIndex()- The text change start index.AccessibilityRecord.getAddedCount()- The number of added characters.AccessibilityRecord.getRemovedCount()- The number of removed characters.
View text selection changed - represents the event of changing the text selection of an EditText.
Type: TYPE_VIEW_TEXT_SELECTION_CHANGED
Properties:
getEventType()- The type of the event.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.
View text traversed at movement granularity - represents the event of traversing the text of a view at a given granularity. For example, moving to the next word.
Type: TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY
Properties:
getEventType()- The type of the event.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.getMovementGranularity()- Sets the granularity at which a view's text was traversed.AccessibilityRecord.getText()- The text of the source's sub-tree.AccessibilityRecord.getFromIndex()- The start the text that was skipped over in this movement. This is the starting point when moving forward through the text, but not when moving back.AccessibilityRecord.getToIndex()- The end of the text that was skipped over in this movement. This is the ending point when moving forward through the text, but not when moving back.getAction()- Gets traversal action which specifies the direction.
View scrolled - represents the event of scrolling a view.
Type: TYPE_VIEW_SCROLLED
Properties:
getEventType()- The type of the event.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.AccessibilityRecord.getScrollDeltaX()- The difference in the horizontal position.AccessibilityRecord.getScrollDeltaY()- The difference in the vertical position.
TRANSITION TYPES
Window state changed - represents the event of a change to a section of the user interface that is visually distinct. Should be sent from either the root view of a window or from a view that is marked as a pane View.setAccessibilityPaneTitle(CharSequence). Note that changes to true windows are represented by TYPE_WINDOWS_CHANGED.
Type: TYPE_WINDOW_STATE_CHANGED
Properties:
getEventType()- The type of the event.getContentChangeTypes()- The type of state changes.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.AccessibilityRecord.getText()- The text of the source's sub-tree, including the pane titles.
Window content changed - represents the event of change in the content of a window. This change can be adding/removing view, changing a view size, etc.
Type: TYPE_WINDOW_CONTENT_CHANGED
Properties:
getEventType()- The type of the event.getContentChangeTypes()- The type of content changes.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.
Windows changed - represents a change in the windows shown on the screen such as a window appeared, a window disappeared, a window size changed, a window layer changed, etc. These events should only come from the system, which is responsible for managing windows. The list of windows is available from AccessibilityService.getWindows(). For regions of the user interface that are presented as windows but are controlled by an app's process, use TYPE_WINDOW_STATE_CHANGED.
Type: TYPE_WINDOWS_CHANGED
Properties:
getEventType()- The type of the event.getEventTime()- The event time.getWindowChanges()- - The specific change to the source window
Note: You can retrieve the AccessibilityWindowInfo for the window source of the event by looking through the list returned by AccessibilityService.getWindows() for the window whose ID matches AccessibilityRecord.getWindowId().
NOTIFICATION TYPES
Notification state changed - represents the event showing a transient piece of information to the user. This information may be a Notification or Toast.
Type: TYPE_NOTIFICATION_STATE_CHANGED
Properties:
getEventType()- The type of the event.AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.AccessibilityRecord.getParcelableData()- The postedNotification, if applicable.AccessibilityRecord.getText()- Displayed text of theToast, if applicable, or may contain text from theNotification, althoughAccessibilityRecord.getParcelableData()is a richer set of data forNotification.
EXPLORATION TYPES
View hover enter - represents the event of beginning to hover over a View. The hover may be generated via exploring the screen by touch or via a pointing device.
Type: TYPE_VIEW_HOVER_ENTER
Properties:
getEventType()- The type of the event.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.
View hover exit - represents the event of stopping to hover over a View. The hover may be generated via exploring the screen by touch or via a pointing device.
Type: TYPE_VIEW_HOVER_EXIT
Properties:
getEventType()- The type of the event.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.
Touch interaction start - represents the event of starting a touch interaction, which is the user starts touching the screen.
Type: TYPE_TOUCH_INTERACTION_START
Properties:
getEventType()- The type of the event.
Note: This event is fired only by the system and is not passed to the view tree to be populated.
Touch interaction end - represents the event of ending a touch interaction, which is the user stops touching the screen.
Type: TYPE_TOUCH_INTERACTION_END
Properties:
getEventType()- The type of the event.
Note: This event is fired only by the system and is not passed to the view tree to be populated.
Touch exploration gesture start - represents the event of starting a touch exploring gesture.
Type: TYPE_TOUCH_EXPLORATION_GESTURE_START
Properties:
getEventType()- The type of the event.
Note: This event is fired only by the system and is not passed to the view tree to be populated.
Touch exploration gesture end - represents the event of ending a touch exploring gesture.
Type: TYPE_TOUCH_EXPLORATION_GESTURE_END
Properties:
getEventType()- The type of the event.
Note: This event is fired only by the system and is not passed to the view tree to be populated.
Touch gesture detection start - represents the event of starting a user gesture detection.
Type: TYPE_GESTURE_DETECTION_START
Properties:
getEventType()- The type of the event.
Note: This event is fired only by the system and is not passed to the view tree to be populated.
Touch gesture detection end - represents the event of ending a user gesture detection.
Type: TYPE_GESTURE_DETECTION_END
Properties:
getEventType()- The type of the event.
Note: This event is fired only by the system and is not passed to the view tree to be populated.
MISCELLANEOUS TYPES
Announcement - represents the event of an application requesting a screen reader to make an announcement. Because the event carries no semantic meaning, this event is appropriate only in exceptional situations where additional screen reader output is needed but other types of accessibility services do not need to be aware of the change.
Type: TYPE_ANNOUNCEMENT
Properties:
getEventType()- The type of the event.AccessibilityRecord.getSource()- The source info (for registered clients).AccessibilityRecord.getClassName()- The class name of the source.getPackageName()- The package name of the source.getEventTime()- The event time.AccessibilityRecord.getText()- The text of the announcement.
See also:
Summary
Constants | |
|---|---|
int | CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION Change type for |
int | CONTENT_CHANGE_TYPE_DRAG_CANCELLED Change type for |
int | CONTENT_CHANGE_TYPE_DRAG_DROPPED Change type for |
int | CONTENT_CHANGE_TYPE_DRAG_STARTED Change type for |
int | CONTENT_CHANGE_TYPE_PANE_APPEARED Change type for |
int | CONTENT_CHANGE_TYPE_PANE_DISAPPEARED Change type for |
int | CONTENT_CHANGE_TYPE_PANE_TITLE Change type for |
int | CONTENT_CHANGE_TYPE_STATE_DESCRIPTION Change type for |
int | CONTENT_CHANGE_TYPE_SUBTREE Change type for |
int | CONTENT_CHANGE_TYPE_TEXT Change type for |
int | CONTENT_CHANGE_TYPE_UNDEFINED Change type for |
int | INVALID_POSITION Invalid selection/focus position. |
int | MAX_TEXT_LENGTH Maximum length of the text fields. |
int | SPEECH_STATE_LISTENING_END Change type for |
int | SPEECH_STATE_LISTENING_START Change type for |
int | SPEECH_STATE_SPEAKING_END Change type for |
int | SPEECH_STATE_SPEAKING_START Change type for |
int | TYPES_ALL_MASK Mask for |
int | TYPE_ANNOUNCEMENT Represents the event of an application making an announcement. |
int | TYPE_ASSIST_READING_CONTEXT Represents the event of the assistant currently reading the users screen context. |
int | TYPE_GESTURE_DETECTION_END Represents the event of ending gesture detection. |
int | TYPE_GESTURE_DETECTION_START Represents the event of beginning gesture detection. |
int | TYPE_NOTIFICATION_STATE_CHANGED Represents the event showing a |
int | TYPE_SPEECH_STATE_CHANGE Represents a change in the speech state defined by the content-change types. |
int | TYPE_TOUCH_EXPLORATION_GESTURE_END Represents the event of ending a touch exploration gesture. |
int | TYPE_TOUCH_EXPLORATION_GESTURE_START Represents the event of starting a touch exploration gesture. |
int | TYPE_TOUCH_INTERACTION_END Represents the event of the user ending to touch the screen. |
int | TYPE_TOUCH_INTERACTION_START Represents the event of the user starting to touch the screen. |
int | TYPE_VIEW_ACCESSIBILITY_FOCUSED Represents the event of gaining accessibility focus. |
int | TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED Represents the event of clearing accessibility focus. |
int | TYPE_VIEW_CLICKED Represents the event of clicking on a |
int | TYPE_VIEW_CONTEXT_CLICKED Represents the event of a context click on a |
int | TYPE_VIEW_FOCUSED Represents the event of setting input focus of a |
int | TYPE_VIEW_HOVER_ENTER Represents the event of a hover enter over a |
int | TYPE_VIEW_HOVER_EXIT Represents the event of a hover exit over a |
int | TYPE_VIEW_LONG_CLICKED Represents the event of long clicking on a |
int | TYPE_VIEW_SCROLLED Represents the event of scrolling a view. |
int | TYPE_VIEW_SELECTED Represents the event of selecting an item usually in the context of an |
int | TYPE_VIEW_TEXT_CHANGED Represents the event of changing the text of an |
int | TYPE_VIEW_TEXT_SELECTION_CHANGED Represents the event of changing the selection in an |
int | TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY Represents the event of traversing the text of a view at a given movement granularity. |
int | TYPE_WINDOWS_CHANGED Represents the event change in the system windows shown on the screen. |
int | TYPE_WINDOW_CONTENT_CHANGED Represents the event of changing the content of a window and more specifically the sub-tree rooted at the event's source. |
int | TYPE_WINDOW_STATE_CHANGED Represents the event of a change to a visually distinct section of the user interface. |
int | WINDOWS_CHANGE_ACCESSIBILITY_FOCUSED Change type for |
int | WINDOWS_CHANGE_ACTIVE Change type for |
int | WINDOWS_CHANGE_ADDED Change type for |
int | WINDOWS_CHANGE_BOUNDS Change type for |
int | WINDOWS_CHANGE_CHILDREN Change type for |
int | WINDOWS_CHANGE_FOCUSED Change type for |
int | WINDOWS_CHANGE_LAYER Change type for |
int | WINDOWS_CHANGE_PARENT Change type for |
int | WINDOWS_CHANGE_PIP Change type for |
int | WINDOWS_CHANGE_REMOVED Change type for |
int | WINDOWS_CHANGE_TITLE Change type for |
Inherited constants |
|---|
From interface android.os.Parcelable |
Fields | |
|---|---|
public static final Creator<AccessibilityEvent> | CREATOR |
Public constructors | |
|---|---|
AccessibilityEvent() Creates a new | |
AccessibilityEvent(int eventType) Creates a new | |
AccessibilityEvent(AccessibilityEvent event) Copy constructor. | |
Public methods | |
|---|---|
void | appendRecord(AccessibilityRecord record) Appends an |
int | describeContents() Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. |
static String | eventTypeToString(int eventType) Returns the string representation of an event type. |
int | getAction() Gets the performed action that triggered this event. |
int | getContentChangeTypes() Gets the bit mask of change types signaled by a |
long | getEventTime() Gets the time in which this event was sent. |
int | getEventType() Gets the event type. |
int | getMovementGranularity() Gets the movement granularity that was traversed. |
CharSequence | getPackageName() Gets the package name of the source. |
AccessibilityRecord | getRecord(int index) Gets the record at a given index. |
int | getRecordCount() Gets the number of records contained in the event. |
int | getSpeechStateChangeTypes() Gets the speech state signaled by a |
int | getWindowChanges() Get the bit mask of change types signaled by a |
void | initFromParcel(Parcel parcel) Creates a new instance from a |
static AccessibilityEvent | obtain(AccessibilityEvent event) This method was deprecated in API level Tiramisu. Object pooling has been discontinued. Create a new instance using the constructor |
static AccessibilityEvent | obtain() This method was deprecated in API level Tiramisu. Object pooling has been discontinued. Create a new instance using the constructor |
static AccessibilityEvent | obtain(int eventType) This method was deprecated in API level Tiramisu. Object pooling has been discontinued. Create a new instance using the constructor |
void | recycle() This method was deprecated in API level Tiramisu. Object pooling has been discontinued. Calling this function now will have no effect. |
void | setAction(int action) Sets the performed action that triggered this event. |
void | setContentChangeTypes(int changeTypes) Sets the bit mask of node tree changes signaled by an |
void | setEventTime(long eventTime) Sets the time in which this event was sent. |
void | setEventType(int eventType) Sets the event type. |
void | setMovementGranularity(int granularity) Sets the movement granularity that was traversed. |
void | setPackageName(CharSequence packageName) Sets the package name of the source. |
void | setSpeechStateChangeTypes(int state) Sets the speech state type signaled by a |
String | toString() Returns a string representation of the object. |
void | writeToParcel(Parcel parcel, int flags) Flatten this object in to a Parcel. |
Inherited methods | |
|---|---|
From class android.view.accessibility.AccessibilityRecord | |
From class java.lang.Object | |
From interface android.os.Parcelable | |
Constants
CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION
Added in API level 19
public static final int CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION
Change type for TYPE_WINDOW_CONTENT_CHANGED event: The node's content description changed.
Constant Value: 4 (0x00000004)
CONTENT_CHANGE_TYPE_DRAG_CANCELLED
Added in API level 32
public static final int CONTENT_CHANGE_TYPE_DRAG_CANCELLED
Change type for TYPE_WINDOW_CONTENT_CHANGED event: A drag in with accessibility enabled has ended. This means the content has been unsuccessfully dropped, the user has canceled the action via an AccessibilityAction, or no drop has been detected within a timeout and the drag was automatically cancelled. This is sent from the source that initiated the drag.
See also:
Constant Value: 512 (0x00000200)
CONTENT_CHANGE_TYPE_DRAG_DROPPED
Added in API level 32
public static final int CONTENT_CHANGE_TYPE_DRAG_DROPPED
Change type for TYPE_WINDOW_CONTENT_CHANGED event: A drag in with accessibility enabled has ended. This means the content has been successfully dropped. This is sent from the target that accepted the dragged content.
See also:
Constant Value: 256 (0x00000100)
CONTENT_CHANGE_TYPE_DRAG_STARTED
Added in API level 32
public static final int CONTENT_CHANGE_TYPE_DRAG_STARTED
Change type for TYPE_WINDOW_CONTENT_CHANGED event: A drag has started while accessibility is enabled. This is either via an AccessibilityAction, or via touch events. This is sent from the source that initiated the drag.
See also:
Constant Value: 128 (0x00000080)
CONTENT_CHANGE_TYPE_PANE_APPEARED
Added in API level 28
public static final int CONTENT_CHANGE_TYPE_PANE_APPEARED
Change type for TYPE_WINDOW_STATE_CHANGED event: The node has a pane title, and either just appeared or just was assigned a title when it had none before.
Constant Value: 16 (0x00000010)
CONTENT_CHANGE_TYPE_PANE_DISAPPEARED
Added in API level 28
public static final int CONTENT_CHANGE_TYPE_PANE_DISAPPEARED
Change type for TYPE_WINDOW_STATE_CHANGED event: Can mean one of two slightly different things. The primary meaning is that the node has a pane title, and was removed from the node hierarchy. It will also be sent if the pane title is set to null after it contained a title. No source will be returned if the node is no longer on the screen. To make the change more clear for the user, the first entry in AccessibilityRecord.getText() will return the value that would have been returned by getSource().getPaneTitle().
Constant Value: 32 (0x00000020)
CONTENT_CHANGE_TYPE_PANE_TITLE
Added in API level 28
public static final int CONTENT_CHANGE_TYPE_PANE_TITLE
Change type for TYPE_WINDOW_STATE_CHANGED event: The node's pane title changed.
Constant Value: 8 (0x00000008)
CONTENT_CHANGE_TYPE_STATE_DESCRIPTION
Added in API level 30
public static final int CONTENT_CHANGE_TYPE_STATE_DESCRIPTION
Change type for TYPE_WINDOW_CONTENT_CHANGED event: state description of the node as returned by AccessibilityNodeInfo#getStateDescription changed. If part of the state description changes, the changed part can be put into event text. For example, if state description changed from "on, wifi signal full" to "on, wifi three bars", "wifi three bars" can be put into the event text.
Constant Value: 64 (0x00000040)
CONTENT_CHANGE_TYPE_SUBTREE
Added in API level 19
public static final int CONTENT_CHANGE_TYPE_SUBTREE
Change type for TYPE_WINDOW_CONTENT_CHANGED event: One or more content changes occurred in the the subtree rooted at the source node, or the subtree's structure changed when a node was added or removed.
Constant Value: 1 (0x00000001)
CONTENT_CHANGE_TYPE_TEXT
Added in API level 19
public static final int CONTENT_CHANGE_TYPE_TEXT
Change type for TYPE_WINDOW_CONTENT_CHANGED event: The node's text changed.
Constant Value: 2 (0x00000002)
CONTENT_CHANGE_TYPE_UNDEFINED
Added in API level 19
public static final int CONTENT_CHANGE_TYPE_UNDEFINED
Change type for TYPE_WINDOW_CONTENT_CHANGED event: The type of change is not defined.
Constant Value: 0 (0x00000000)
INVALID_POSITION
Added in API level 4
public static final int INVALID_POSITION
Invalid selection/focus position.
See also:
Constant Value: -1 (0xffffffff)
MAX_TEXT_LENGTH
Added in API level 4
Deprecated in API level 15
public static final int MAX_TEXT_LENGTH
Maximum length of the text fields.
See also:
AccessibilityRecord.getBeforeText()Note: This constant is no longer needed since there is no limit on the length of text that is contained in an accessibility event anymore.
Constant Value: 500 (0x000001f4)
SPEECH_STATE_LISTENING_END
public static final int SPEECH_STATE_LISTENING_END
Change type for TYPE_SPEECH_STATE_CHANGE event: another service is no longer listening to the microphone.
Constant Value: 8 (0x00000008)
SPEECH_STATE_LISTENING_START
public static final int SPEECH_STATE_LISTENING_START
Change type for TYPE_SPEECH_STATE_CHANGE event: another service is listening to the microphone.
Constant Value: 4 (0x00000004)
SPEECH_STATE_SPEAKING_END
public static final int SPEECH_STATE_SPEAKING_END
Change type for TYPE_SPEECH_STATE_CHANGE event: another service is no longer speaking.
Constant Value: 2 (0x00000002)
SPEECH_STATE_SPEAKING_START
public static final int SPEECH_STATE_SPEAKING_START
Change type for TYPE_SPEECH_STATE_CHANGE event: another service is speaking.
Constant Value: 1 (0x00000001)
TYPES_ALL_MASK
Added in API level 4
public static final int TYPES_ALL_MASK
Mask for AccessibilityEvent all types.
See also:
TYPE_VIEW_CLICKEDTYPE_VIEW_LONG_CLICKEDTYPE_VIEW_SELECTEDTYPE_VIEW_FOCUSEDTYPE_VIEW_TEXT_CHANGEDTYPE_WINDOW_STATE_CHANGEDTYPE_NOTIFICATION_STATE_CHANGEDTYPE_VIEW_HOVER_ENTERTYPE_VIEW_HOVER_EXITTYPE_TOUCH_EXPLORATION_GESTURE_STARTTYPE_TOUCH_EXPLORATION_GESTURE_ENDTYPE_WINDOW_CONTENT_CHANGEDTYPE_VIEW_SCROLLEDTYPE_VIEW_TEXT_SELECTION_CHANGEDTYPE_ANNOUNCEMENTTYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITYTYPE_GESTURE_DETECTION_STARTTYPE_GESTURE_DETECTION_ENDTYPE_TOUCH_INTERACTION_STARTTYPE_TOUCH_INTERACTION_ENDTYPE_WINDOWS_CHANGEDTYPE_VIEW_CONTEXT_CLICKED
Constant Value: -1 (0xffffffff)
TYPE_ANNOUNCEMENT
Added in API level 16
public static final int TYPE_ANNOUNCEMENT
Represents the event of an application making an announcement.
Constant Value: 16384 (0x00004000)
TYPE_ASSIST_READING_CONTEXT
Added in API level 23
public static final int TYPE_ASSIST_READING_CONTEXT
Represents the event of the assistant currently reading the users screen context.
Constant Value: 16777216 (0x01000000)
TYPE_GESTURE_DETECTION_END
Added in API level 17
public static final int TYPE_GESTURE_DETECTION_END
Represents the event of ending gesture detection.
Constant Value: 524288 (0x00080000)
TYPE_GESTURE_DETECTION_START
Added in API level 17
public static final int TYPE_GESTURE_DETECTION_START
Represents the event of beginning gesture detection.
Constant Value: 262144 (0x00040000)
TYPE_NOTIFICATION_STATE_CHANGED
Added in API level 4
public static final int TYPE_NOTIFICATION_STATE_CHANGED
Represents the event showing a Notification.
Constant Value: 64 (0x00000040)
TYPE_SPEECH_STATE_CHANGE
public static final int TYPE_SPEECH_STATE_CHANGE
Represents a change in the speech state defined by the content-change types. A change in the speech state occurs when another service is either speaking or listening for human speech. This event helps avoid conflicts where two services want to speak or one listens when another speaks.
See also:
SPEECH_STATE_SPEAKING_STARTSPEECH_STATE_SPEAKING_ENDSPEECH_STATE_LISTENING_STARTSPEECH_STATE_LISTENING_END
Constant Value: 33554432 (0x02000000)
TYPE_TOUCH_EXPLORATION_GESTURE_END
Added in API level 14
public static final int TYPE_TOUCH_EXPLORATION_GESTURE_END
Represents the event of ending a touch exploration gesture.
Constant Value: 1024 (0x00000400)
TYPE_TOUCH_EXPLORATION_GESTURE_START
Added in API level 14
public static final int TYPE_TOUCH_EXPLORATION_GESTURE_START
Represents the event of starting a touch exploration gesture.
Constant Value: 512 (0x00000200)
TYPE_TOUCH_INTERACTION_END
Added in API level 17
public static final int TYPE_TOUCH_INTERACTION_END
Represents the event of the user ending to touch the screen.
Constant Value: 2097152 (0x00200000)
TYPE_TOUCH_INTERACTION_START
Added in API level 17
public static final int TYPE_TOUCH_INTERACTION_START
Represents the event of the user starting to touch the screen.
Constant Value: 1048576 (0x00100000)
TYPE_VIEW_ACCESSIBILITY_FOCUSED
Added in API level 16
public static final int TYPE_VIEW_ACCESSIBILITY_FOCUSED
Represents the event of gaining accessibility focus.
Constant Value: 32768 (0x00008000)
TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED
Added in API level 16
public static final int TYPE_VIEW_ACCESSIBILITY_FOCUS_CLEARED
Represents the event of clearing accessibility focus.
Constant Value: 65536 (0x00010000)
TYPE_VIEW_CLICKED
Added in API level 4
public static final int TYPE_VIEW_CLICKED
Represents the event of clicking on a View like Button, CompoundButton, etc.
Constant Value: 1 (0x00000001)
TYPE_VIEW_CONTEXT_CLICKED
Added in API level 23
public static final int TYPE_VIEW_CONTEXT_CLICKED
Represents the event of a context click on a View.
Constant Value: 8388608 (0x00800000)
TYPE_VIEW_FOCUSED
Added in API level 4
public static final int TYPE_VIEW_FOCUSED
Represents the event of setting input focus of a View.
Constant Value: 8 (0x00000008)
TYPE_VIEW_HOVER_ENTER
Added in API level 14
public static final int TYPE_VIEW_HOVER_ENTER
Represents the event of a hover enter over a View.
Constant Value: 128 (0x00000080)
TYPE_VIEW_HOVER_EXIT
Added in API level 14
public static final int TYPE_VIEW_HOVER_EXIT
Represents the event of a hover exit over a View.
Constant Value: 256 (0x00000100)
TYPE_VIEW_LONG_CLICKED
Added in API level 4
public static final int TYPE_VIEW_LONG_CLICKED
Represents the event of long clicking on a View like Button, CompoundButton, etc.
Constant Value: 2 (0x00000002)
TYPE_VIEW_SCROLLED
Added in API level 14
public static final int TYPE_VIEW_SCROLLED
Represents the event of scrolling a view. This event type is generally not sent directly.
See also:
Constant Value: 4096 (0x00001000)
TYPE_VIEW_SELECTED
Added in API level 4
public static final int TYPE_VIEW_SELECTED
Represents the event of selecting an item usually in the context of an AdapterView.
Constant Value: 4 (0x00000004)
TYPE_VIEW_TEXT_CHANGED
Added in API level 4
public static final int TYPE_VIEW_TEXT_CHANGED
Represents the event of changing the text of an EditText.
Constant Value: 16 (0x00000010)
TYPE_VIEW_TEXT_SELECTION_CHANGED
Added in API level 14
public static final int TYPE_VIEW_TEXT_SELECTION_CHANGED
Represents the event of changing the selection in an EditText.
Constant Value: 8192 (0x00002000)
TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY
Added in API level 16
public static final int TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY
Represents the event of traversing the text of a view at a given movement granularity.
Constant Value: 131072 (0x00020000)
TYPE_WINDOWS_CHANGED
Added in API level 21
public static final int TYPE_WINDOWS_CHANGED
Represents the event change in the system windows shown on the screen. This event type should only be dispatched by the system.
Constant Value: 4194304 (0x00400000)
TYPE_WINDOW_CONTENT_CHANGED
Added in API level 14
public static final int TYPE_WINDOW_CONTENT_CHANGED
Represents the event of changing the content of a window and more specifically the sub-tree rooted at the event's source.
Constant Value: 2048 (0x00000800)
TYPE_WINDOW_STATE_CHANGED
Added in API level 4
public static final int TYPE_WINDOW_STATE_CHANGED
Represents the event of a change to a visually distinct section of the user interface. These events should only be dispatched from Views that have accessibility pane titles, and replaces TYPE_WINDOW_CONTENT_CHANGED for those sources. Details about the change are available from getContentChangeTypes().
Constant Value: 32 (0x00000020)
WINDOWS_CHANGE_ACCESSIBILITY_FOCUSED
Added in API level 28
public static final int WINDOWS_CHANGE_ACCESSIBILITY_FOCUSED
Change type for TYPE_WINDOWS_CHANGED event: The window's AccessibilityWindowInfo#isAccessibilityFocused() changed.
Constant Value: 128 (0x00000080)
WINDOWS_CHANGE_ACTIVE
Added in API level 28
public static final int WINDOWS_CHANGE_ACTIVE
Change type for TYPE_WINDOWS_CHANGED event: The window's AccessibilityWindowInfo#isActive() changed.
Constant Value: 32 (0x00000020)
WINDOWS_CHANGE_ADDED
Added in API level 28
public static final int WINDOWS_CHANGE_ADDED
Change type for TYPE_WINDOWS_CHANGED event: The window was added.
Constant Value: 1 (0x00000001)
WINDOWS_CHANGE_BOUNDS
Added in API level 28
public static final int WINDOWS_CHANGE_BOUNDS
Change type for TYPE_WINDOWS_CHANGED event: The window's bounds changed.
Starting in R, this event implies the window's region changed. It's also possible that region changed but bounds doesn't.
Constant Value: 8 (0x00000008)
WINDOWS_CHANGE_CHILDREN
Added in API level 28
public static final int WINDOWS_CHANGE_CHILDREN
Change type for TYPE_WINDOWS_CHANGED event: The window's children changed.
Constant Value: 512 (0x00000200)
WINDOWS_CHANGE_FOCUSED
Added in API level 28
public static final int WINDOWS_CHANGE_FOCUSED
Change type for TYPE_WINDOWS_CHANGED event: The window's AccessibilityWindowInfo#isFocused() changed.
Constant Value: 64 (0x00000040)
WINDOWS_CHANGE_LAYER
Added in API level 28
public static final int WINDOWS_CHANGE_LAYER
Change type for TYPE_WINDOWS_CHANGED event: The window's layer changed.
Constant Value: 16 (0x00000010)
WINDOWS_CHANGE_PARENT
Added in API level 28
public static final int WINDOWS_CHANGE_PARENT
Change type for TYPE_WINDOWS_CHANGED event: The window's parent changed.
Constant Value: 256 (0x00000100)
WINDOWS_CHANGE_PIP
Added in API level 28
public static final int WINDOWS_CHANGE_PIP
Change type for TYPE_WINDOWS_CHANGED event: The window either entered or exited picture-in-picture mode.
Constant Value: 1024 (0x00000400)
WINDOWS_CHANGE_REMOVED
Added in API level 28
public static final int WINDOWS_CHANGE_REMOVED
Change type for TYPE_WINDOWS_CHANGED event: A window was removed.
Constant Value: 2 (0x00000002)
WINDOWS_CHANGE_TITLE
Added in API level 28
public static final int WINDOWS_CHANGE_TITLE
Change type for TYPE_WINDOWS_CHANGED event: The window's title changed.
Constant Value: 4 (0x00000004)
Fields
CREATOR
Added in API level 4
public static final Creator<AccessibilityEvent> CREATOR
See also:
Public constructors
AccessibilityEvent
Added in API level 30
public AccessibilityEvent ()
Creates a new AccessibilityEvent.
AccessibilityEvent
Added in API level 30
public AccessibilityEvent (int eventType)
Creates a new AccessibilityEvent with the given eventType.
| Parameters | |
|---|---|
eventType | int: The event type. |
AccessibilityEvent
Added in API level 30
public AccessibilityEvent (AccessibilityEvent event)
Copy constructor. Creates a new AccessibilityEvent, and this instance is initialized from the given event.
| Parameters | |
|---|---|
event | AccessibilityEvent: The other event. This value cannot be null. |
Public methods
appendRecord
Added in API level 14
public void appendRecord (AccessibilityRecord record)
Appends an AccessibilityRecord to the end of event records.
| Parameters | |
|---|---|
record | AccessibilityRecord: The record to append. |
| Throws | |
|---|---|
IllegalStateException | If called from an AccessibilityService. |
describeContents
Added in API level 4
public int describeContents ()
Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(android.os.Parcel, int), the return value of this method must include the CONTENTS_FILE_DESCRIPTOR bit.
| Returns | |
|---|---|
int | a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either 0 or CONTENTS_FILE_DESCRIPTOR |
eventTypeToString
Added in API level 14
public static String eventTypeToString (int eventType)
Returns the string representation of an event type. For example, TYPE_VIEW_CLICKED is represented by the string TYPE_VIEW_CLICKED.
| Parameters | |
|---|---|
eventType | int: The event type |
| Returns | |
|---|---|
String | The string representation. |
getAction
Added in API level 16
public int getAction ()
Gets the performed action that triggered this event.
| Returns | |
|---|---|
int | The action. |
getContentChangeTypes
Added in API level 19
public int getContentChangeTypes ()
Gets the bit mask of change types signaled by a TYPE_WINDOW_CONTENT_CHANGED event or TYPE_WINDOW_STATE_CHANGED. A single event may represent multiple change types.
getEventTime
Added in API level 4
public long getEventTime ()
Gets the time in which this event was sent.
| Returns | |
|---|---|
long | The event time. |
getEventType
Added in API level 4
public int getEventType ()
Gets the event type.
getMovementGranularity
Added in API level 16
public int getMovementGranularity ()
Gets the movement granularity that was traversed.
| Returns | |
|---|---|
int | The granularity. |
getPackageName
Added in API level 4
public CharSequence getPackageName ()
Gets the package name of the source.
| Returns | |
|---|---|
CharSequence | The package name. |
getRecord
Added in API level 14
public AccessibilityRecord getRecord (int index)
Gets the record at a given index.
| Parameters | |
|---|---|
index | int: The index. |
| Returns | |
|---|---|
AccessibilityRecord | The record at the specified index. |
getRecordCount
Added in API level 14
public int getRecordCount ()
Gets the number of records contained in the event.
| Returns | |
|---|---|
int | The number of records. |
getSpeechStateChangeTypes
public int getSpeechStateChangeTypes ()
Gets the speech state signaled by a TYPE_SPEECH_STATE_CHANGE event
| Returns | |
|---|---|
int | |
See also:
SPEECH_STATE_SPEAKING_STARTSPEECH_STATE_SPEAKING_ENDSPEECH_STATE_LISTENING_STARTSPEECH_STATE_LISTENING_END
getWindowChanges
Added in API level 28
public int getWindowChanges ()
Get the bit mask of change types signaled by a TYPE_WINDOWS_CHANGED event. A single event may represent multiple change types.
| Returns | |
|---|---|
int | The bit mask of change types. Value is either 0 or a combination of WINDOWS_CHANGE_ADDED, WINDOWS_CHANGE_REMOVED, WINDOWS_CHANGE_TITLE, WINDOWS_CHANGE_BOUNDS, WINDOWS_CHANGE_LAYER, WINDOWS_CHANGE_ACTIVE, WINDOWS_CHANGE_FOCUSED, WINDOWS_CHANGE_ACCESSIBILITY_FOCUSED, WINDOWS_CHANGE_PARENT, WINDOWS_CHANGE_CHILDREN, and WINDOWS_CHANGE_PIP |
initFromParcel
Added in API level 4
public void initFromParcel (Parcel parcel)
Creates a new instance from a Parcel.
| Parameters | |
|---|---|
parcel | Parcel: A parcel containing the state of a AccessibilityEvent. |
obtain
Added in API level 14
Deprecated in API level Tiramisu
public static AccessibilityEvent obtain (AccessibilityEvent event)
This method was deprecated in API level Tiramisu.
Object pooling has been discontinued. Create a new instance using the constructor AccessibilityEvent() instead.
Instantiates a new AccessibilityEvent instance. The returned instance is initialized from the given event.
| Parameters | |
|---|---|
event | AccessibilityEvent: The other event. |
| Returns | |
|---|---|
AccessibilityEvent | An instance. |
obtain
Added in API level 4
Deprecated in API level Tiramisu
public static AccessibilityEvent obtain ()
This method was deprecated in API level Tiramisu.
Object pooling has been discontinued. Create a new instance using the constructor AccessibilityEvent() instead.
Instantiates a new AccessibilityEvent instance.
| Returns | |
|---|---|
AccessibilityEvent | An instance. |
obtain
Added in API level 4
Deprecated in API level Tiramisu
public static AccessibilityEvent obtain (int eventType)
This method was deprecated in API level Tiramisu.
Object pooling has been discontinued. Create a new instance using the constructor AccessibilityEvent() instead.
Instantiates a new AccessibilityEvent instance with its type property set.
| Parameters | |
|---|---|
eventType | int: The event type. |
| Returns | |
|---|---|
AccessibilityEvent | An instance. |
recycle
Added in API level 4
Deprecated in API level Tiramisu
public void recycle ()
This method was deprecated in API level Tiramisu.
Object pooling has been discontinued. Calling this function now will have no effect.
Previously would recycle an instance back to be reused.
setAction
Added in API level 16
public void setAction (int action)
Sets the performed action that triggered this event.
Valid actions are defined in AccessibilityNodeInfo:
AccessibilityNodeInfo#ACTION_ACCESSIBILITY_FOCUSAccessibilityNodeInfo#ACTION_CLEAR_ACCESSIBILITY_FOCUSAccessibilityNodeInfo#ACTION_CLEAR_FOCUSAccessibilityNodeInfo#ACTION_CLEAR_SELECTIONAccessibilityNodeInfo#ACTION_CLICK- etc.
| Parameters | |
|---|---|
action | int: The action. |
| Throws | |
|---|---|
IllegalStateException | If called from an AccessibilityService. |
See also:
setContentChangeTypes
Added in API level 19
public void setContentChangeTypes (int changeTypes)
Sets the bit mask of node tree changes signaled by an TYPE_WINDOW_CONTENT_CHANGED event.
| Parameters | |
|---|---|
changeTypes | int: The bit mask of change types. Value is either 0 or a combination of CONTENT_CHANGE_TYPE_UNDEFINED, CONTENT_CHANGE_TYPE_SUBTREE, CONTENT_CHANGE_TYPE_TEXT, CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION, CONTENT_CHANGE_TYPE_STATE_DESCRIPTION, CONTENT_CHANGE_TYPE_PANE_TITLE, CONTENT_CHANGE_TYPE_PANE_APPEARED, CONTENT_CHANGE_TYPE_PANE_DISAPPEARED, CONTENT_CHANGE_TYPE_DRAG_STARTED, CONTENT_CHANGE_TYPE_DRAG_DROPPED, and CONTENT_CHANGE_TYPE_DRAG_CANCELLED |
| Throws | |
|---|---|
IllegalStateException | If called from an AccessibilityService. |
See also:
setEventTime
Added in API level 4
public void setEventTime (long eventTime)
Sets the time in which this event was sent.
| Parameters | |
|---|---|
eventTime | long: The event time. |
| Throws | |
|---|---|
IllegalStateException | If called from an AccessibilityService. |
setEventType
Added in API level 4
public void setEventType (int eventType)
Sets the event type. Note: An event must represent a single event type.
| Throws | |
|---|---|
IllegalStateException | If called from an AccessibilityService. |
setMovementGranularity
Added in API level 16
public void setMovementGranularity (int granularity)
Sets the movement granularity that was traversed.
| Parameters | |
|---|---|
granularity | int: The granularity. |
| Throws | |
|---|---|
IllegalStateException | If called from an AccessibilityService. |
setPackageName
Added in API level 4
public void setPackageName (CharSequence packageName)
Sets the package name of the source.
| Parameters | |
|---|---|
packageName | CharSequence: The package name. |
| Throws | |
|---|---|
IllegalStateException | If called from an AccessibilityService. |
setSpeechStateChangeTypes
public void setSpeechStateChangeTypes (int state)
Sets the speech state type signaled by a TYPE_SPEECH_STATE_CHANGE event
| Parameters | |
|---|---|
state | int |
See also:
SPEECH_STATE_SPEAKING_STARTSPEECH_STATE_SPEAKING_ENDSPEECH_STATE_LISTENING_STARTSPEECH_STATE_LISTENING_END
toString
Added in API level 4
public String toString ()
Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.
The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:
getClass().getName() + '@' + Integer.toHexString(hashCode())
| Returns | |
|---|---|
String | a string representation of the object. |
writeToParcel
Added in API level 4
public void writeToParcel (Parcel parcel, int flags)
Flatten this object in to a Parcel.
| Parameters | |
|---|---|
parcel | Parcel: The Parcel in which the object should be written. This value cannot be null. |
flags | int: Additional flags about how the object should be written. May be 0 or Parcelable.PARCELABLE_WRITE_RETURN_VALUE. Value is either 0 or a combination of Parcelable.PARCELABLE_WRITE_RETURN_VALUE, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES |
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