AccessibilityEvent

Class Overview

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 add an AccessibilityRecord for itself before dispatching a similar request to its parent. A parent can also choose not to respect the request for sending an event. The accessibility event is sent by the topmost view in the view tree. Therefore, an AccessibilityService can explore all records in an accessibility event to obtain more information about the context in which the event was fired.

The main purpose of an accessibility event is to expose enough information for an AccessibilityService to provide meaningful feedback to the user. Sometimes however, an accessibility service may need more contextual information then the one in the event pay-load. In such cases the service can obtain the event source which is an AccessibilityNodeInfo (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:

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.
• getSource() - The source info (for registered clients).
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.
• getText() - The text of the source's sub-tree.
• isEnabled() - Whether the source is enabled.
• isPassword() - Whether the source is password.
• isChecked() - Whether the source is checked.
• getContentDescription() - The content description of the source.
• getScrollX() - The offset of the source left edge in pixels (without descendants of AdapterView).
• getScrollY() - The offset of the source top edge in pixels (without descendants of AdapterView).
• getFromIndex() - The zero based index of the first visible item of the source, inclusive (for descendants of AdapterView).
• getToIndex() - The zero based index of the last visible item of the source, inclusive (for descendants of AdapterView).
• getItemCount() - The total items of the source (for descendants of AdapterView).

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.
• getSource() - The source info (for registered clients).
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.
• getText() - The text of the source's sub-tree.
• isEnabled() - Whether the source is enabled.
• isPassword() - Whether the source is password.
• isChecked() - Whether the source is checked.
• getContentDescription() - The content description of the source.
• getScrollX() - The offset of the source left edge in pixels (without descendants of AdapterView).
• getScrollY() - The offset of the source top edge in pixels (without descendants of AdapterView).
• getFromIndex() - The zero based index of the first visible item of the source, inclusive (for descendants of AdapterView).
• getToIndex() - The zero based index of the last visible item of the source, inclusive (for descendants of AdapterView).
• getItemCount() - The total items of the source (for descendants of AdapterView).

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.
• getSource() - The source info (for registered clients).
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.
• getText() - The text of the source's sub-tree.
• isEnabled() - Whether the source is enabled.
• isPassword() - Whether the source is password.
• isChecked() - Whether the source is checked.
• getItemCount() - The number of selectable items of the source.
• getCurrentItemIndex() - The currently selected item index.
• getContentDescription() - The content description of the source.
• getScrollX() - The offset of the source left edge in pixels (without descendants of AdapterView).
• getScrollY() - The offset of the source top edge in pixels (without descendants of AdapterView).
• getFromIndex() - The zero based index of the first visible item of the source, inclusive (for descendants of AdapterView).
• getToIndex() - The zero based index of the last visible item of the source, inclusive (for descendants of AdapterView).
• getItemCount() - The total items of the source (for descendants of AdapterView).

View focused - represents the event of focusing a View.
Type: TYPE_VIEW_FOCUSED
Properties:

• getEventType() - The type of the event.
• getSource() - The source info (for registered clients).
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.
• getText() - The text of the source's sub-tree.
• isEnabled() - Whether the source is enabled.
• isPassword() - Whether the source is password.
• isChecked() - Whether the source is checked.
• getItemCount() - The number of focusable items on the screen.
• getCurrentItemIndex() - The currently focused item index.
• getContentDescription() - The content description of the source.
• getScrollX() - The offset of the source left edge in pixels (without descendants of AdapterView).
• getScrollY() - The offset of the source top edge in pixels (without descendants of AdapterView).
• getFromIndex() - The zero based index of the first visible item of the source, inclusive (for descendants of AdapterView).
• getToIndex() - The zero based index of the last visible item of the source, inclusive (for descendants of AdapterView).
• getItemCount() - The total items of the source (for descendants of AdapterView).

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.
• getSource() - The source info (for registered clients).
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.
• getText() - The text of the source.
• isEnabled() - Whether the source is enabled.
• isPassword() - Whether the source is password.
• isChecked() - Whether the source is checked.
• getFromIndex() - The text change start index.
• getAddedCount() - The number of added characters.
• getRemovedCount() - The number of removed characters.
• getBeforeText() - The text of the source before the change.
• getContentDescription() - The content description of the source.

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.
• getSource() - The source info (for registered clients).
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.
• getText() - The text of the source.
• isPassword() - Whether the source is password.
• getFromIndex() - The selection start index.
• getToIndex() - The selection end index.
• getItemCount() - The length of the source text.
• isEnabled() - Whether the source is enabled.
• getContentDescription() - The content description of the source.

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.
• getSource() - The source info (for registered clients).
• 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.
• getText() - The text of the source's sub-tree.
• getFromIndex() - The start of the next/previous text at the specified granularity - inclusive.
• getToIndex() - The end of the next/previous text at the specified granularity - exclusive.
• isPassword() - Whether the source is password.
• isEnabled() - Whether the source is enabled.
• getContentDescription() - The content description of the source.
• getMovementGranularity() - Sets the granularity at which a view's text was traversed.
• getAction() - Gets traversal action which specifies the direction.

View scrolled - represents the event of scrolling a view. If the source is a descendant of AdapterView the scroll is reported in terms of visible items - the first visible item, the last visible item, and the total items - because the the source is unaware of its pixel size since its adapter is responsible for creating views. In all other cases the scroll is reported as the current scroll on the X and Y axis respectively plus the height of the source in pixels.
Type: TYPE_VIEW_SCROLLED
Properties:

• getEventType() - The type of the event.
• getSource() - The source info (for registered clients).
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.
• getText() - The text of the source's sub-tree.
• isEnabled() - Whether the source is enabled.
• getContentDescription() - The content description of the source.
• getScrollX() - The offset of the source left edge in pixels (without descendants of AdapterView).
• getScrollY() - The offset of the source top edge in pixels (without descendants of AdapterView).
• getFromIndex() - The zero based index of the first visible item of the source, inclusive (for descendants of AdapterView).
• getToIndex() - The zero based index of the last visible item of the source, inclusive (for descendants of AdapterView).
• getItemCount() - The total items of the source (for descendants of AdapterView).

Note: This event type is not dispatched to descendants though View.dispatchPopulateAccessibilityEvent(AccessibilityEvent), hence the event source View and the sub-tree rooted at it will not receive calls to View.onPopulateAccessibilityEvent(AccessibilityEvent). The preferred way to add text content to such events is by setting the contentDescription of the source view.

TRANSITION TYPES

Window state changed - represents the event of opening a PopupWindow, Menu, Dialog, etc.
Type: TYPE_WINDOW_STATE_CHANGED
Properties:

• getEventType() - The type of the event.
• getSource() - The source info (for registered clients).
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.
• getText() - The text of the source's sub-tree.
• isEnabled() - Whether the source is enabled.

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.

Note: This event is fired only for the window source of the last accessibility event different from TYPE_NOTIFICATION_STATE_CHANGED and its purpose is to notify clients that the content of the user interaction window has changed.
Type: TYPE_WINDOW_CONTENT_CHANGED
Properties:

• getEventType() - The type of the event.
• getContentChangeTypes() - The type of content changes.
• getSource() - The source info (for registered clients).
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.

Note: This event type is not dispatched to descendants though View.dispatchPopulateAccessibilityEvent(AccessibilityEvent), hence the event source View and the sub-tree rooted at it will not receive calls to View.onPopulateAccessibilityEvent(AccessibilityEvent). The preferred way to add text content to such events is by setting the contentDescription of the source view.

Windows changed - represents the event of changes in the windows shown on the screen such as a window appeared, a window disappeared, a window size changed, a window layer changed, etc.
Type: TYPE_WINDOWS_CHANGED
Properties:

• getEventType() - The type of the event.
• getEventTime() - The event time.

Note: You can retrieve the AccessibilityWindowInfo for the window source of the event via getSource() to get the source node on which then call AccessibilityNodeInfo.getWindow() to get the window. Also all windows on the screen can be retrieved by a call to android.accessibilityservice.AccessibilityService.getWindows().

NOTIFICATION TYPES

Notification state changed - represents the event showing Notification.
Type: TYPE_NOTIFICATION_STATE_CHANGED
Properties:

• getEventType() - The type of the event.
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.
• getText() - The text of the source's sub-tree.
• getParcelableData() - The posted Notification.
• getText() - Text for providing more context.

Note: This event type is not dispatched to descendants though View.dispatchPopulateAccessibilityEvent(AccessibilityEvent), hence the event source View and the sub-tree rooted at it will not receive calls to View.onPopulateAccessibilityEvent(AccessibilityEvent). The preferred way to add text content to such events is by setting the contentDescription of the source view.

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.
• getSource() - The source info (for registered clients).
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.
• getText() - The text of the source's sub-tree.
• isEnabled() - Whether the source is enabled.
• getContentDescription() - The content description of the source.
• getScrollX() - The offset of the source left edge in pixels (without descendants of AdapterView).
• getScrollY() - The offset of the source top edge in pixels (without descendants of AdapterView).
• getFromIndex() - The zero based index of the first visible item of the source, inclusive (for descendants of AdapterView).
• getToIndex() - The zero based index of the last visible item of the source, inclusive (for descendants of AdapterView).
• getItemCount() - The total items of the source (for descendants of AdapterView).

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.
• getSource() - The source info (for registered clients).
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.
• getText() - The text of the source's sub-tree.
• isEnabled() - Whether the source is enabled.
• getContentDescription() - The content description of the source.
• getScrollX() - The offset of the source left edge in pixels (without descendants of AdapterView).
• getScrollY() - The offset of the source top edge in pixels (without descendants of AdapterView).
• getFromIndex() - The zero based index of the first visible item of the source, inclusive (for descendants of AdapterView).
• getToIndex() - The zero based index of the last visible item of the source, inclusive (for descendants of AdapterView).
• getItemCount() - The total items of the source (for descendants of AdapterView).

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 making an announcement. Usually this announcement is related to some sort of a context change for which none of the events representing UI transitions is a good fit. For example, announcing a new page in a book.
Type: TYPE_ANNOUNCEMENT
Properties:

• getEventType() - The type of the event.
• getSource() - The source info (for registered clients).
• getClassName() - The class name of the source.
• getPackageName() - The package name of the source.
• getEventTime() - The event time.
• getText() - The text of the announcement.
• isEnabled() - Whether the source is enabled.

Security note

Since an event contains the text of its source privacy can be compromised by leaking sensitive information such as passwords. To address this issue any event fired in response to manipulation of a PASSWORD field does NOT CONTAIN the text of the password.

Summary

Constants
int	CONTENT_CHANGE_TYPE_CONTENT_DESCRIPTION	Change type for TYPE_WINDOW_CONTENT_CHANGED event: The node's content description changed.
int	CONTENT_CHANGE_TYPE_SUBTREE	Change type for TYPE_WINDOW_CONTENT_CHANGED event: A node in the subtree rooted at the source node was added or removed.
int	CONTENT_CHANGE_TYPE_TEXT	Change type for TYPE_WINDOW_CONTENT_CHANGED event: The node's text changed.
int	CONTENT_CHANGE_TYPE_UNDEFINED	Change type for TYPE_WINDOW_CONTENT_CHANGED event: The type of change is not defined.
int	INVALID_POSITION	Invalid selection/focus position.
int	MAX_TEXT_LENGTH	Maximum length of the text fields.
int	TYPES_ALL_MASK	Mask for AccessibilityEvent all types.
int	TYPE_ANNOUNCEMENT	Represents the event of an application making an announcement.
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 Notification.
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 View like Button, CompoundButton, etc.
int	TYPE_VIEW_FOCUSED	Represents the event of setting input focus of a View.
int	TYPE_VIEW_HOVER_ENTER	Represents the event of a hover enter over a View.
int	TYPE_VIEW_HOVER_EXIT	Represents the event of a hover exit over a View.
int	TYPE_VIEW_LONG_CLICKED	Represents the event of long clicking on a View like Button, CompoundButton, etc.
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 AdapterView.
int	TYPE_VIEW_TEXT_CHANGED	Represents the event of changing the text of an EditText.
int	TYPE_VIEW_TEXT_SELECTION_CHANGED	Represents the event of changing the selection in an EditText.
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 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 opening a PopupWindow, Menu, Dialog, etc.

[Expand] Inherited Constants

From interface android.os.Parcelable int CONTENTS_FILE_DESCRIPTOR Bit masks for use with describeContents(): each bit represents a kind of object considered to have potential special significance when marshalled. int PARCELABLE_WRITE_RETURN_VALUE Flag for use with writeToParcel(Parcel, int): the object being written is a return value, that is the result of a function such as "Parcelable someFunction()", "void someFunction(out Parcelable)", or "void someFunction(inout Parcelable)".

Fields
public static final Creator<AccessibilityEvent>	CREATOR

Public Methods
void	appendRecord(AccessibilityRecord record) Appends an AccessibilityRecord to the end of event records.
int	describeContents() Describe the kinds of special objects contained in this Parcelable's marshalled 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 an TYPE_WINDOW_CONTENT_CHANGED event.
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.
void	initFromParcel(Parcel parcel) Creates a new instance from a Parcel.
static AccessibilityEvent	obtain(int eventType) Returns a cached instance if such is available or a new one is instantiated with its type property set.
static AccessibilityEvent	obtain() Returns a cached instance if such is available or a new one is instantiated.
static AccessibilityEvent	obtain(AccessibilityEvent event) Returns a cached instance if such is available or a new one is created.
void	recycle() Recycles an instance back to be reused.
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 TYPE_WINDOW_CONTENT_CHANGED event.
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.
String	toString() Returns a string containing a concise, human-readable description of this object.
void	writeToParcel(Parcel parcel, int flags) Flatten this object in to a Parcel.

[Expand] Inherited Methods
From class android.view.accessibility.AccessibilityRecord int getAddedCount() Gets the number of added characters. CharSequence getBeforeText() Sets the text before a change. CharSequence getClassName() Gets the class name of the source. CharSequence getContentDescription() Gets the description of the source. int getCurrentItemIndex() Gets the index of the source in the list of items the can be visited. int getFromIndex() Gets the index of the first character of the changed sequence, or the beginning of a text selection or the index of the first visible item when scrolling. int getItemCount() Gets the number of items that can be visited. int getMaxScrollX() Gets the max scroll offset of the source left edge in pixels. int getMaxScrollY() Gets the max scroll offset of the source top edge in pixels. Parcelable getParcelableData() Gets the Parcelable data. int getRemovedCount() Gets the number of removed characters. int getScrollX() Gets the scroll offset of the source left edge in pixels. int getScrollY() Gets the scroll offset of the source top edge in pixels. AccessibilityNodeInfo getSource() Gets the AccessibilityNodeInfo of the event source. List<CharSequence> getText() Gets the text of the event. int getToIndex() Gets the index of text selection end or the index of the last visible item when scrolling. int getWindowId() Gets the id of the window from which the event comes from. boolean isChecked() Gets if the source is checked. boolean isEnabled() Gets if the source is enabled. boolean isFullScreen() Gets if the source is taking the entire screen. boolean isPassword() Gets if the source is a password field. boolean isScrollable() Gets if the source is scrollable. static AccessibilityRecord obtain(AccessibilityRecord record) Returns a cached instance if such is available or a new one is instantiated. static AccessibilityRecord obtain() Returns a cached instance if such is available or a new one is instantiated. void recycle() Return an instance back to be reused. void setAddedCount(int addedCount) Sets the number of added characters. void setBeforeText(CharSequence beforeText) Sets the text before a change. void setChecked(boolean isChecked) Sets if the source is checked. void setClassName(CharSequence className) Sets the class name of the source. void setContentDescription(CharSequence contentDescription) Sets the description of the source. void setCurrentItemIndex(int currentItemIndex) Sets the index of the source in the list of items that can be visited. void setEnabled(boolean isEnabled) Sets if the source is enabled. void setFromIndex(int fromIndex) Sets the index of the first character of the changed sequence or the beginning of a text selection or the index of the first visible item when scrolling. void setFullScreen(boolean isFullScreen) Sets if the source is taking the entire screen. void setItemCount(int itemCount) Sets the number of items that can be visited. void setMaxScrollX(int maxScrollX) Sets the max scroll offset of the source left edge in pixels. void setMaxScrollY(int maxScrollY) Sets the max scroll offset of the source top edge in pixels. void setParcelableData(Parcelable parcelableData) Sets the Parcelable data of the event. void setPassword(boolean isPassword) Sets if the source is a password field. void setRemovedCount(int removedCount) Sets the number of removed characters. void setScrollX(int scrollX) Sets the scroll offset of the source left edge in pixels. void setScrollY(int scrollY) Sets the scroll offset of the source top edge in pixels. void setScrollable(boolean scrollable) Sets if the source is scrollable. void setSource(View root, int virtualDescendantId) Sets the source to be a virtual descendant of the given root. void setSource(View source) Sets the event source. void setToIndex(int toIndex) Sets the index of text selection end or the index of the last visible item when scrolling. String toString() Returns a string containing a concise, human-readable description of this object.
From class java.lang.Object Object clone() Creates and returns a copy of this Object. boolean equals(Object o) Compares this instance with the specified object and indicates if they are equal. void finalize() Invoked when the garbage collector has detected that this instance is no longer reachable. final Class<?> getClass() Returns the unique instance of Class that represents this object's class. int hashCode() Returns an integer hash code for this object. final void notify() Causes a thread which is waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up. final void notifyAll() Causes all threads which are waiting on this object's monitor (by means of calling one of the wait() methods) to be woken up. String toString() Returns a string containing a concise, human-readable description of this object. final void wait() Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object. final void wait(long millis, int nanos) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires. final void wait(long millis) Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the specified timeout expires.
From interface android.os.Parcelable abstract int describeContents() Describe the kinds of special objects contained in this Parcelable's marshalled representation. abstract void writeToParcel(Parcel dest, int flags) Flatten this object in to a Parcel.

   getClass().getName() + '@' + Integer.toHexString(hashCode())