Classes
- AccessibilityService
- AccessibilityServiceInfo

Added in API level 4

public abstract class

AccessibilityService

extends Service

java.lang.Object
↳	android.content.Context
	↳	android.content.ContextWrapper
		↳	android.app.Service
			↳	android.accessibilityservice.AccessibilityService

Class Overview

An accessibility service runs in the background and receives callbacks by the system when AccessibilityEvents are fired. Such events denote some state transition in the user interface, for example, the focus has changed, a button has been clicked, etc. Such a service can optionally request the capability for querying the content of the active window. Development of an accessibility service requires extending this class and implementing its abstract methods.

Developer Guides

For more information about creating AccessibilityServices, read the Accessibility developer guide.

Lifecycle

The lifecycle of an accessibility service is managed exclusively by the system and follows the established service life cycle. Additionally, starting or stopping an accessibility service is triggered exclusively by an explicit user action through enabling or disabling it in the device settings. After the system binds to a service it calls onServiceConnected(). This method can be overriden by clients that want to perform post binding setup.

Declaration

An accessibility is declared as any other service in an AndroidManifest.xml but it must also specify that it handles the "android.accessibilityservice.AccessibilityService" Intent. Failure to declare this intent will cause the system to ignore the accessibility service. Additionally an accessibility service must request the BIND_ACCESSIBILITY_SERVICE permission to ensure that only the system can bind to it. Failure to declare this intent will cause the system to ignore the accessibility service. Following is an example declaration:

 <service android:name=".MyAccessibilityService"
         android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
     <intent-filter>
         <action android:name="android.accessibilityservice.AccessibilityService" />
     </intent-filter>
     . . .
 </service>

Configuration

An accessibility service can be configured to receive specific types of accessibility events, listen only to specific packages, get events from each type only once in a given time frame, retrieve window content, specify a settings activity, etc.

There are two approaches for configuring an accessibility service:

Providing a meta-data entry in the manifest when declaring the service. A service declaration with a meta-data tag is presented below:

 <service android:name=".MyAccessibilityService">
     <intent-filter>
         <action android:name="android.accessibilityservice.AccessibilityService" />
     </intent-filter>
     <meta-data android:name="android.accessibilityservice" android:resource="@xml/accessibilityservice" />
 </service>

Note: This approach enables setting all properties.

For more details refer to SERVICE_META_DATA and <accessibility-service>.

Calling setServiceInfo(AccessibilityServiceInfo). Note that this method can be called any time to dynamically change the service configuration.
Note: This approach enables setting only dynamically configurable properties: eventTypes, feedbackType, flags, notificationTimeout, packageNames

For more details refer to AccessibilityServiceInfo.

Retrieving window content

A service can specify in its declaration that it can retrieve the active window content which is represented as a tree of AccessibilityNodeInfo. Note that declaring this capability requires that the service declares its configuration via an XML resource referenced by SERVICE_META_DATA.

For security purposes an accessibility service can retrieve only the content of the currently active window. The currently active window is defined as the window from which was fired the last event of the following types: TYPE_WINDOW_STATE_CHANGED, TYPE_VIEW_HOVER_ENTER, TYPE_VIEW_HOVER_EXIT, In other words, the last window that was shown or the last window that the user has touched during touch exploration.

The entry point for retrieving window content is through calling AccessibilityEvent.getSource() of the last received event of the above types or a previous event from the same window (see AccessibilityEvent.getWindowId()). Invoking this method will return an AccessibilityNodeInfo that can be used to traverse the window content which represented as a tree of such objects.

Note An accessibility service may have requested to be notified for a subset of the event types, thus be unaware that the active window has changed. Therefore accessibility service that would like to retrieve window content should:

Register for all event types with no notification timeout and keep track for the active window by calling getWindowId() of the last received event and compare this with the getWindowId() before calling retrieval methods on the latter.
Prepare that a retrieval method on AccessibilityNodeInfo may fail since the active window has changed and the service did not get the accessibility event yet. Note that it is possible to have a retrieval method failing even adopting the strategy specified in the previous bullet because the accessibility event dispatch is asynchronous and crosses process boundaries.

Notification strategy

For each feedback type only one accessibility service is notified. Services are notified in the order of registration. Hence, if two services are registered for the same feedback type in the same package the first one wins. It is possible however, to register a service as the default one for a given feedback type. In such a case this service is invoked if no other service was interested in the event. In other words, default services do not compete with other services and are notified last regardless of the registration order. This enables "generic" accessibility services that work reasonably well with most applications to coexist with "polished" ones that are targeted for specific applications.

Note: The event notification timeout is useful to avoid propagating events to the client too frequently since this is accomplished via an expensive interprocess call. One can think of the timeout as a criteria to determine when event generation has settled down.

Event types

Feedback types

Summary

Constants
int	GESTURE_SWIPE_DOWN	The user has performed a swipe down gesture on the touch screen.
int	GESTURE_SWIPE_DOWN_AND_LEFT	The user has performed an down and left gesture on the touch screen.
int	GESTURE_SWIPE_DOWN_AND_RIGHT	The user has performed an down and right gesture on the touch screen.
int	GESTURE_SWIPE_DOWN_AND_UP	The user has performed a swipe down and up gesture on the touch screen.
int	GESTURE_SWIPE_LEFT	The user has performed a swipe left gesture on the touch screen.
int	GESTURE_SWIPE_LEFT_AND_DOWN	The user has performed a left and down gesture on the touch screen.
int	GESTURE_SWIPE_LEFT_AND_RIGHT	The user has performed a swipe left and right gesture on the touch screen.
int	GESTURE_SWIPE_LEFT_AND_UP	The user has performed a left and up gesture on the touch screen.
int	GESTURE_SWIPE_RIGHT	The user has performed a swipe right gesture on the touch screen.
int	GESTURE_SWIPE_RIGHT_AND_DOWN	The user has performed a right and down gesture on the touch screen.
int	GESTURE_SWIPE_RIGHT_AND_LEFT	The user has performed a swipe right and left gesture on the touch screen.
int	GESTURE_SWIPE_RIGHT_AND_UP	The user has performed a right and up gesture on the touch screen.
int	GESTURE_SWIPE_UP	The user has performed a swipe up gesture on the touch screen.
int	GESTURE_SWIPE_UP_AND_DOWN	The user has performed a swipe up and down gesture on the touch screen.
int	GESTURE_SWIPE_UP_AND_LEFT	The user has performed an up and left gesture on the touch screen.
int	GESTURE_SWIPE_UP_AND_RIGHT	The user has performed an up and right gesture on the touch screen.
int	GLOBAL_ACTION_BACK	Action to go back.
int	GLOBAL_ACTION_HOME	Action to go home.
int	GLOBAL_ACTION_NOTIFICATIONS	Action to open the notifications.
int	GLOBAL_ACTION_POWER_DIALOG	Action to open the power long-press dialog.
int	GLOBAL_ACTION_QUICK_SETTINGS	Action to open the quick settings.
int	GLOBAL_ACTION_RECENTS	Action to open the recent apps.
String	SERVICE_INTERFACE	The `Intent` that must be declared as handled by the service.
String	SERVICE_META_DATA	Name under which an AccessibilityService component publishes information about itself.

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Inherited Constants

From class android.app.Service

From class android.content.Context

From interface android.content.ComponentCallbacks2

Public Constructors
	AccessibilityService()

Public Methods
AccessibilityNodeInfo	findFocus(int focus) Find the view that has the specified focus type.
AccessibilityNodeInfo	getRootInActiveWindow() Gets the root node in the currently active window if this service can retrieve window content.
final AccessibilityServiceInfo	getServiceInfo() Gets the an `AccessibilityServiceInfo` describing this `AccessibilityService`.
Object	getSystemService(String name) Return the handle to a system-level service by name.
List<AccessibilityWindowInfo>	getWindows() Gets the windows on the screen.
abstract void	onAccessibilityEvent(AccessibilityEvent event) Callback for `AccessibilityEvent`s.
final IBinder	onBind(Intent intent) Implement to return the implementation of the internal accessibility service interface.
abstract void	onInterrupt() Callback for interrupting the accessibility feedback.
final boolean	performGlobalAction(int action) Performs a global action.
final void	setServiceInfo(AccessibilityServiceInfo info) Sets the `AccessibilityServiceInfo` that describes this service.

Protected Methods
boolean	onGesture(int gestureId) Called by the system when the user performs a specific gesture on the touch screen.
boolean	onKeyEvent(KeyEvent event) Callback that allows an accessibility service to observe the key events before they are passed to the rest of the system.
void	onServiceConnected() This method is a part of the `AccessibilityService` lifecycle and is called after the system has successfully bound to the service.

[Expand]

Inherited Methods

From class android.app.Service

void	dump(FileDescriptor fd, PrintWriter writer, String[] args) Print the Service's state into the given stream.
final Application	getApplication() Return the application that owns this service.
abstract IBinder	onBind(Intent intent) Return the communication channel to the service.
void	onConfigurationChanged(Configuration newConfig) Called by the system when the device configuration changes while your component is running.
void	onCreate() Called by the system when the service is first created.
void	onDestroy() Called by the system to notify a Service that it is no longer used and is being removed.
void	onLowMemory() This is called when the overall system is running low on memory, and actively running processes should trim their memory usage.
void	onRebind(Intent intent) Called when new clients have connected to the service, after it had previously been notified that all had disconnected in its `onUnbind(Intent)`.
void	onStart(Intent intent, int startId) This method was deprecated in API level 5. Implement `onStartCommand(Intent, int, int)` instead.
int	onStartCommand(Intent intent, int flags, int startId) Called by the system every time a client explicitly starts the service by calling `startService(Intent)`, providing the arguments it supplied and a unique integer token representing the start request.
void	onTaskRemoved(Intent rootIntent) This is called if the service is currently running and the user has removed a task that comes from the service's application.
void	onTrimMemory(int level) Called when the operating system has determined that it is a good time for a process to trim unneeded memory from its process.
boolean	onUnbind(Intent intent) Called when all clients have disconnected from a particular interface published by the service.
final void	startForeground(int id, Notification notification) Make this service run in the foreground, supplying the ongoing notification to be shown to the user while in this state.
final void	stopForeground(boolean removeNotification) Remove this service from foreground state, allowing it to be killed if more memory is needed.
final void	stopSelf() Stop the service, if it was previously started.
final void	stopSelf(int startId) Old version of `stopSelfResult(int)` that doesn't return a result.
final boolean	stopSelfResult(int startId) Stop the service if the most recent time it was started was `startId`.

From class android.content.ContextWrapper

void	attachBaseContext(Context base) Set the base context for this ContextWrapper.
boolean	bindService(Intent service, ServiceConnection conn, int flags) Connect to an application service, creating it if needed.
int	checkCallingOrSelfPermission(String permission) Determine whether the calling process of an IPC or you have been granted a particular permission.
int	checkCallingOrSelfUriPermission(Uri uri, int modeFlags) Determine whether the calling process of an IPC or you has been granted permission to access a specific URI.
int	checkCallingPermission(String permission) Determine whether the calling process of an IPC you are handling has been granted a particular permission.
int	checkCallingUriPermission(Uri uri, int modeFlags) Determine whether the calling process and user ID has been granted permission to access a specific URI.
int	checkPermission(String permission, int pid, int uid) Determine whether the given permission is allowed for a particular process and user ID running in the system.
int	checkUriPermission(Uri uri, int pid, int uid, int modeFlags) Determine whether a particular process and user ID has been granted permission to access a specific URI.
int	checkUriPermission(Uri uri, String readPermission, String writePermission, int pid, int uid, int modeFlags) Check both a Uri and normal permission.
void	clearWallpaper() This method is deprecated. Use `WallpaperManager.clear()` instead. This method requires the caller to hold the permission `SET_WALLPAPER`.
Context	createConfigurationContext(Configuration overrideConfiguration) Return a new Context object for the current Context but whose resources are adjusted to match the given Configuration.
Context	createDisplayContext(Display display) Return a new Context object for the current Context but whose resources are adjusted to match the metrics of the given Display.
Context	createPackageContext(String packageName, int flags) Return a new Context object for the given application name.
String[]	databaseList() Returns an array of strings naming the private databases associated with this Context's application package.
boolean	deleteDatabase(String name) Delete an existing private SQLiteDatabase associated with this Context's application package.
boolean	deleteFile(String name) Delete the given private file associated with this Context's application package.
void	enforceCallingOrSelfPermission(String permission, String message) If neither you nor the calling process of an IPC you are handling has been granted a particular permission, throw a `SecurityException`.
void	enforceCallingOrSelfUriPermission(Uri uri, int modeFlags, String message) If the calling process of an IPC or you has not been granted permission to access a specific URI, throw `SecurityException`.
void	enforceCallingPermission(String permission, String message) If the calling process of an IPC you are handling has not been granted a particular permission, throw a `SecurityException`.
void	enforceCallingUriPermission(Uri uri, int modeFlags, String message) If the calling process and user ID has not been granted permission to access a specific URI, throw `SecurityException`.
void	enforcePermission(String permission, int pid, int uid, String message) If the given permission is not allowed for a particular process and user ID running in the system, throw a `SecurityException`.
void	enforceUriPermission(Uri uri, int pid, int uid, int modeFlags, String message) If a particular process and user ID has not been granted permission to access a specific URI, throw `SecurityException`.
void	enforceUriPermission(Uri uri, String readPermission, String writePermission, int pid, int uid, int modeFlags, String message) Enforce both a Uri and normal permission.
String[]	fileList() Returns an array of strings naming the private files associated with this Context's application package.
Context	getApplicationContext() Return the context of the single, global Application object of the current process.
ApplicationInfo	getApplicationInfo() Return the full application info for this context's package.
AssetManager	getAssets() Return an AssetManager instance for your application's package.
Context	getBaseContext()
File	getCacheDir() Returns the absolute path to the application specific cache directory on the filesystem.
ClassLoader	getClassLoader() Return a class loader you can use to retrieve classes in this package.
File	getCodeCacheDir() Returns the absolute path to the application specific cache directory on the filesystem designed for storing cached code.
ContentResolver	getContentResolver() Return a ContentResolver instance for your application's package.
File	getDatabasePath(String name) Returns the absolute path on the filesystem where a database created with `openOrCreateDatabase(String, int, SQLiteDatabase.CursorFactory)` is stored.
File	getDir(String name, int mode) Retrieve, creating if needed, a new directory in which the application can place its own custom data files.
File	getExternalCacheDir() Returns the absolute path to the directory on the primary external filesystem (that is somewhere on `Environment.getExternalStorageDirectory()` where the application can place cache files it owns.
File[]	getExternalCacheDirs() Returns absolute paths to application-specific directories on all external storage devices where the application can place cache files it owns.
File	getExternalFilesDir(String type) Returns the absolute path to the directory on the primary external filesystem (that is somewhere on `Environment.getExternalStorageDirectory()`) where the application can place persistent files it owns.
File[]	getExternalFilesDirs(String type) Returns absolute paths to application-specific directories on all external storage devices where the application can place persistent files it owns.
File[]	getExternalMediaDirs() Returns absolute paths to application-specific directories on all external storage devices where the application can place media files.
File	getFileStreamPath(String name) Returns the absolute path on the filesystem where a file created with `openFileOutput(String, int)` is stored.
File	getFilesDir() Returns the absolute path to the directory on the filesystem where files created with `openFileOutput(String, int)` are stored.
Looper	getMainLooper() Return the Looper for the main thread of the current process.
File	getNoBackupFilesDir() Returns the absolute path to the directory on the filesystem similar to `getFilesDir()`.
File	getObbDir() Return the primary external storage directory where this application's OBB files (if there are any) can be found.
File[]	getObbDirs() Returns absolute paths to application-specific directories on all external storage devices where the application's OBB files (if there are any) can be found.
String	getPackageCodePath() Return the full path to this context's primary Android package.
PackageManager	getPackageManager() Return PackageManager instance to find global package information.
String	getPackageName() Return the name of this application's package.
String	getPackageResourcePath() Return the full path to this context's primary Android package.
Resources	getResources() Return a Resources instance for your application's package.
SharedPreferences	getSharedPreferences(String name, int mode) Retrieve and hold the contents of the preferences file 'name', returning a SharedPreferences through which you can retrieve and modify its values.
Object	getSystemService(String name) Return the handle to a system-level service by name.
Resources.Theme	getTheme() Return the Theme object associated with this Context.
Drawable	getWallpaper() This method is deprecated. Use `WallpaperManager.get()` instead.
int	getWallpaperDesiredMinimumHeight() This method is deprecated. Use `WallpaperManager.getDesiredMinimumHeight()` instead.
int	getWallpaperDesiredMinimumWidth() This method is deprecated. Use `WallpaperManager.getDesiredMinimumWidth()` instead.
void	grantUriPermission(String toPackage, Uri uri, int modeFlags) Grant permission to access a specific Uri to another package, regardless of whether that package has general permission to access the Uri's content provider.
boolean	isRestricted() Indicates whether this Context is restricted.
FileInputStream	openFileInput(String name) Open a private file associated with this Context's application package for reading.
FileOutputStream	openFileOutput(String name, int mode) Open a private file associated with this Context's application package for writing.
SQLiteDatabase	openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory) Open a new private SQLiteDatabase associated with this Context's application package.
SQLiteDatabase	openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory, DatabaseErrorHandler errorHandler) Open a new private SQLiteDatabase associated with this Context's application package.
Drawable	peekWallpaper() This method is deprecated. Use `WallpaperManager.peek()` instead.
Intent	registerReceiver(BroadcastReceiver receiver, IntentFilter filter) Register a BroadcastReceiver to be run in the main activity thread.
Intent	registerReceiver(BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler) Register to receive intent broadcasts, to run in the context of `scheduler`.
void	removeStickyBroadcast(Intent intent) This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
void	removeStickyBroadcastAsUser(Intent intent, UserHandle user) This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
void	revokeUriPermission(Uri uri, int modeFlags) Remove all permissions to access a particular content provider Uri that were previously added with `grantUriPermission(String, Uri, int)`.
void	sendBroadcast(Intent intent) Broadcast the given intent to all interested BroadcastReceivers.
void	sendBroadcast(Intent intent, String receiverPermission) Broadcast the given intent to all interested BroadcastReceivers, allowing an optional required permission to be enforced.
void	sendBroadcastAsUser(Intent intent, UserHandle user) Version of `sendBroadcast(Intent)` that allows you to specify the user the broadcast will be sent to.
void	sendBroadcastAsUser(Intent intent, UserHandle user, String receiverPermission) Version of `sendBroadcast(Intent, String)` that allows you to specify the user the broadcast will be sent to.
void	sendOrderedBroadcast(Intent intent, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras) Version of `sendBroadcast(Intent)` that allows you to receive data back from the broadcast.
void	sendOrderedBroadcast(Intent intent, String receiverPermission) Broadcast the given intent to all interested BroadcastReceivers, delivering them one at a time to allow more preferred receivers to consume the broadcast before it is delivered to less preferred receivers.
void	sendOrderedBroadcastAsUser(Intent intent, UserHandle user, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras) Version of `sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)` that allows you to specify the user the broadcast will be sent to.
void	sendStickyBroadcast(Intent intent) This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
void	sendStickyBroadcastAsUser(Intent intent, UserHandle user) This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
void	sendStickyOrderedBroadcast(Intent intent, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras) This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
void	sendStickyOrderedBroadcastAsUser(Intent intent, UserHandle user, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras) This method is deprecated. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
void	setTheme(int resid) Set the base theme for this context.
void	setWallpaper(Bitmap bitmap) This method is deprecated. Use `WallpaperManager.set()` instead. This method requires the caller to hold the permission `SET_WALLPAPER`.
void	setWallpaper(InputStream data) This method is deprecated. Use `WallpaperManager.set()` instead. This method requires the caller to hold the permission `SET_WALLPAPER`.
void	startActivities(Intent[] intents) Same as `startActivities(Intent[], Bundle)` with no options specified.
void	startActivities(Intent[] intents, Bundle options) Launch multiple new activities.
void	startActivity(Intent intent) Same as `startActivity(Intent, Bundle)` with no options specified.
void	startActivity(Intent intent, Bundle options) Launch a new activity.
boolean	startInstrumentation(ComponentName className, String profileFile, Bundle arguments) Start executing an `Instrumentation` class.
void	startIntentSender(IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, Bundle options) Like `startActivity(Intent, Bundle)`, but taking a IntentSender to start.
void	startIntentSender(IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) Same as `startIntentSender(IntentSender, Intent, int, int, int, Bundle)` with no options specified.
ComponentName	startService(Intent service) Request that a given application service be started.
boolean	stopService(Intent name) Request that a given application service be stopped.
void	unbindService(ServiceConnection conn) Disconnect from an application service.
void	unregisterReceiver(BroadcastReceiver receiver) Unregister a previously registered BroadcastReceiver.

From class android.content.Context

abstract boolean	bindService(Intent service, ServiceConnection conn, int flags) Connect to an application service, creating it if needed.
abstract int	checkCallingOrSelfPermission(String permission) Determine whether the calling process of an IPC or you have been granted a particular permission.
abstract int	checkCallingOrSelfUriPermission(Uri uri, int modeFlags) Determine whether the calling process of an IPC or you has been granted permission to access a specific URI.
abstract int	checkCallingPermission(String permission) Determine whether the calling process of an IPC you are handling has been granted a particular permission.
abstract int	checkCallingUriPermission(Uri uri, int modeFlags) Determine whether the calling process and user ID has been granted permission to access a specific URI.
abstract int	checkPermission(String permission, int pid, int uid) Determine whether the given permission is allowed for a particular process and user ID running in the system.
abstract int	checkUriPermission(Uri uri, int pid, int uid, int modeFlags) Determine whether a particular process and user ID has been granted permission to access a specific URI.
abstract int	checkUriPermission(Uri uri, String readPermission, String writePermission, int pid, int uid, int modeFlags) Check both a Uri and normal permission.
abstract void	clearWallpaper() This method was deprecated in API level 5. Use `WallpaperManager.clear()` instead. This method requires the caller to hold the permission `SET_WALLPAPER`.
abstract Context	createConfigurationContext(Configuration overrideConfiguration) Return a new Context object for the current Context but whose resources are adjusted to match the given Configuration.
abstract Context	createDisplayContext(Display display) Return a new Context object for the current Context but whose resources are adjusted to match the metrics of the given Display.
abstract Context	createPackageContext(String packageName, int flags) Return a new Context object for the given application name.
abstract String[]	databaseList() Returns an array of strings naming the private databases associated with this Context's application package.
abstract boolean	deleteDatabase(String name) Delete an existing private SQLiteDatabase associated with this Context's application package.
abstract boolean	deleteFile(String name) Delete the given private file associated with this Context's application package.
abstract void	enforceCallingOrSelfPermission(String permission, String message) If neither you nor the calling process of an IPC you are handling has been granted a particular permission, throw a `SecurityException`.
abstract void	enforceCallingOrSelfUriPermission(Uri uri, int modeFlags, String message) If the calling process of an IPC or you has not been granted permission to access a specific URI, throw `SecurityException`.
abstract void	enforceCallingPermission(String permission, String message) If the calling process of an IPC you are handling has not been granted a particular permission, throw a `SecurityException`.
abstract void	enforceCallingUriPermission(Uri uri, int modeFlags, String message) If the calling process and user ID has not been granted permission to access a specific URI, throw `SecurityException`.
abstract void	enforcePermission(String permission, int pid, int uid, String message) If the given permission is not allowed for a particular process and user ID running in the system, throw a `SecurityException`.
abstract void	enforceUriPermission(Uri uri, int pid, int uid, int modeFlags, String message) If a particular process and user ID has not been granted permission to access a specific URI, throw `SecurityException`.
abstract void	enforceUriPermission(Uri uri, String readPermission, String writePermission, int pid, int uid, int modeFlags, String message) Enforce both a Uri and normal permission.
abstract String[]	fileList() Returns an array of strings naming the private files associated with this Context's application package.
abstract Context	getApplicationContext() Return the context of the single, global Application object of the current process.
abstract ApplicationInfo	getApplicationInfo() Return the full application info for this context's package.
abstract AssetManager	getAssets() Return an AssetManager instance for your application's package.
abstract File	getCacheDir() Returns the absolute path to the application specific cache directory on the filesystem.
abstract ClassLoader	getClassLoader() Return a class loader you can use to retrieve classes in this package.
abstract File	getCodeCacheDir() Returns the absolute path to the application specific cache directory on the filesystem designed for storing cached code.
abstract ContentResolver	getContentResolver() Return a ContentResolver instance for your application's package.
abstract File	getDatabasePath(String name) Returns the absolute path on the filesystem where a database created with `openOrCreateDatabase(String, int, SQLiteDatabase.CursorFactory)` is stored.
abstract File	getDir(String name, int mode) Retrieve, creating if needed, a new directory in which the application can place its own custom data files.
final Drawable	getDrawable(int id) Return a drawable object associated with a particular resource ID and styled for the current theme.
abstract File	getExternalCacheDir() Returns the absolute path to the directory on the primary external filesystem (that is somewhere on `Environment.getExternalStorageDirectory()` where the application can place cache files it owns.
abstract File[]	getExternalCacheDirs() Returns absolute paths to application-specific directories on all external storage devices where the application can place cache files it owns.
abstract File	getExternalFilesDir(String type) Returns the absolute path to the directory on the primary external filesystem (that is somewhere on `Environment.getExternalStorageDirectory()`) where the application can place persistent files it owns.
abstract File[]	getExternalFilesDirs(String type) Returns absolute paths to application-specific directories on all external storage devices where the application can place persistent files it owns.
abstract File[]	getExternalMediaDirs() Returns absolute paths to application-specific directories on all external storage devices where the application can place media files.
abstract File	getFileStreamPath(String name) Returns the absolute path on the filesystem where a file created with `openFileOutput(String, int)` is stored.
abstract File	getFilesDir() Returns the absolute path to the directory on the filesystem where files created with `openFileOutput(String, int)` are stored.
abstract Looper	getMainLooper() Return the Looper for the main thread of the current process.
abstract File	getNoBackupFilesDir() Returns the absolute path to the directory on the filesystem similar to `getFilesDir()`.
abstract File	getObbDir() Return the primary external storage directory where this application's OBB files (if there are any) can be found.
abstract File[]	getObbDirs() Returns absolute paths to application-specific directories on all external storage devices where the application's OBB files (if there are any) can be found.
abstract String	getPackageCodePath() Return the full path to this context's primary Android package.
abstract PackageManager	getPackageManager() Return PackageManager instance to find global package information.
abstract String	getPackageName() Return the name of this application's package.
abstract String	getPackageResourcePath() Return the full path to this context's primary Android package.
abstract Resources	getResources() Return a Resources instance for your application's package.
abstract SharedPreferences	getSharedPreferences(String name, int mode) Retrieve and hold the contents of the preferences file 'name', returning a SharedPreferences through which you can retrieve and modify its values.
final String	getString(int resId) Return a localized string from the application's package's default string table.
final String	getString(int resId, Object... formatArgs) Return a localized formatted string from the application's package's default string table, substituting the format arguments as defined in `Formatter` and `format(String, Object...)`.
abstract Object	getSystemService(String name) Return the handle to a system-level service by name.
final CharSequence	getText(int resId) Return a localized, styled CharSequence from the application's package's default string table.
abstract Resources.Theme	getTheme() Return the Theme object associated with this Context.
abstract Drawable	getWallpaper() This method was deprecated in API level 5. Use `WallpaperManager.get()` instead.
abstract int	getWallpaperDesiredMinimumHeight() This method was deprecated in API level 5. Use `WallpaperManager.getDesiredMinimumHeight()` instead.
abstract int	getWallpaperDesiredMinimumWidth() This method was deprecated in API level 5. Use `WallpaperManager.getDesiredMinimumWidth()` instead.
abstract void	grantUriPermission(String toPackage, Uri uri, int modeFlags) Grant permission to access a specific Uri to another package, regardless of whether that package has general permission to access the Uri's content provider.
boolean	isRestricted() Indicates whether this Context is restricted.
final TypedArray	obtainStyledAttributes(int[] attrs) Retrieve styled attribute information in this Context's theme.
final TypedArray	obtainStyledAttributes(AttributeSet set, int[] attrs, int defStyleAttr, int defStyleRes) Retrieve styled attribute information in this Context's theme.
final TypedArray	obtainStyledAttributes(AttributeSet set, int[] attrs) Retrieve styled attribute information in this Context's theme.
final TypedArray	obtainStyledAttributes(int resid, int[] attrs) Retrieve styled attribute information in this Context's theme.
abstract FileInputStream	openFileInput(String name) Open a private file associated with this Context's application package for reading.
abstract FileOutputStream	openFileOutput(String name, int mode) Open a private file associated with this Context's application package for writing.
abstract SQLiteDatabase	openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory) Open a new private SQLiteDatabase associated with this Context's application package.
abstract SQLiteDatabase	openOrCreateDatabase(String name, int mode, SQLiteDatabase.CursorFactory factory, DatabaseErrorHandler errorHandler) Open a new private SQLiteDatabase associated with this Context's application package.
abstract Drawable	peekWallpaper() This method was deprecated in API level 5. Use `WallpaperManager.peek()` instead.
void	registerComponentCallbacks(ComponentCallbacks callback) Add a new `ComponentCallbacks` to the base application of the Context, which will be called at the same times as the ComponentCallbacks methods of activities and other components are called.
abstract Intent	registerReceiver(BroadcastReceiver receiver, IntentFilter filter) Register a BroadcastReceiver to be run in the main activity thread.
abstract Intent	registerReceiver(BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler) Register to receive intent broadcasts, to run in the context of `scheduler`.
abstract void	removeStickyBroadcast(Intent intent) This method was deprecated in API level 21. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
abstract void	removeStickyBroadcastAsUser(Intent intent, UserHandle user) This method was deprecated in API level 21. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
abstract void	revokeUriPermission(Uri uri, int modeFlags) Remove all permissions to access a particular content provider Uri that were previously added with `grantUriPermission(String, Uri, int)`.
abstract void	sendBroadcast(Intent intent, String receiverPermission) Broadcast the given intent to all interested BroadcastReceivers, allowing an optional required permission to be enforced.
abstract void	sendBroadcast(Intent intent) Broadcast the given intent to all interested BroadcastReceivers.
abstract void	sendBroadcastAsUser(Intent intent, UserHandle user) Version of `sendBroadcast(Intent)` that allows you to specify the user the broadcast will be sent to.
abstract void	sendBroadcastAsUser(Intent intent, UserHandle user, String receiverPermission) Version of `sendBroadcast(Intent, String)` that allows you to specify the user the broadcast will be sent to.
abstract void	sendOrderedBroadcast(Intent intent, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras) Version of `sendBroadcast(Intent)` that allows you to receive data back from the broadcast.
abstract void	sendOrderedBroadcast(Intent intent, String receiverPermission) Broadcast the given intent to all interested BroadcastReceivers, delivering them one at a time to allow more preferred receivers to consume the broadcast before it is delivered to less preferred receivers.
abstract void	sendOrderedBroadcastAsUser(Intent intent, UserHandle user, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras) Version of `sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)` that allows you to specify the user the broadcast will be sent to.
abstract void	sendStickyBroadcast(Intent intent) This method was deprecated in API level 21. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
abstract void	sendStickyBroadcastAsUser(Intent intent, UserHandle user) This method was deprecated in API level 21. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
abstract void	sendStickyOrderedBroadcast(Intent intent, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras) This method was deprecated in API level 21. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
abstract void	sendStickyOrderedBroadcastAsUser(Intent intent, UserHandle user, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras) This method was deprecated in API level 21. Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
abstract void	setTheme(int resid) Set the base theme for this context.
abstract void	setWallpaper(InputStream data) This method was deprecated in API level 5. Use `WallpaperManager.set()` instead. This method requires the caller to hold the permission `SET_WALLPAPER`.
abstract void	setWallpaper(Bitmap bitmap) This method was deprecated in API level 5. Use `WallpaperManager.set()` instead. This method requires the caller to hold the permission `SET_WALLPAPER`.
abstract void	startActivities(Intent[] intents, Bundle options) Launch multiple new activities.
abstract void	startActivities(Intent[] intents) Same as `startActivities(Intent[], Bundle)` with no options specified.
abstract void	startActivity(Intent intent) Same as `startActivity(Intent, Bundle)` with no options specified.
abstract void	startActivity(Intent intent, Bundle options) Launch a new activity.
abstract boolean	startInstrumentation(ComponentName className, String profileFile, Bundle arguments) Start executing an `Instrumentation` class.
abstract void	startIntentSender(IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, Bundle options) Like `startActivity(Intent, Bundle)`, but taking a IntentSender to start.
abstract void	startIntentSender(IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags) Same as `startIntentSender(IntentSender, Intent, int, int, int, Bundle)` with no options specified.
abstract ComponentName	startService(Intent service) Request that a given application service be started.
abstract boolean	stopService(Intent service) Request that a given application service be stopped.
abstract void	unbindService(ServiceConnection conn) Disconnect from an application service.
void	unregisterComponentCallbacks(ComponentCallbacks callback) Remove a `ComponentCallbacks` object that was previously registered with `registerComponentCallbacks(ComponentCallbacks)`.
abstract void	unregisterReceiver(BroadcastReceiver receiver) Unregister a previously registered BroadcastReceiver.

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.content.ComponentCallbacks2

From interface android.content.ComponentCallbacks

Constants

public static final int GESTURE_SWIPE_DOWN

Added in API level 16

The user has performed a swipe down gesture on the touch screen.

Constant Value: 2 (0x00000002)

public static final int GESTURE_SWIPE_DOWN_AND_LEFT

Added in API level 16

The user has performed an down and left gesture on the touch screen.

Constant Value: 15 (0x0000000f)

public static final int GESTURE_SWIPE_DOWN_AND_RIGHT

Added in API level 16

The user has performed an down and right gesture on the touch screen.

Constant Value: 16 (0x00000010)

public static final int GESTURE_SWIPE_DOWN_AND_UP

Added in API level 16

The user has performed a swipe down and up gesture on the touch screen.

Constant Value: 8 (0x00000008)

public static final int GESTURE_SWIPE_LEFT

Added in API level 16

The user has performed a swipe left gesture on the touch screen.

Constant Value: 3 (0x00000003)

public static final int GESTURE_SWIPE_LEFT_AND_DOWN

Added in API level 16

The user has performed a left and down gesture on the touch screen.

Constant Value: 10 (0x0000000a)

public static final int GESTURE_SWIPE_LEFT_AND_RIGHT

Added in API level 16

The user has performed a swipe left and right gesture on the touch screen.

Constant Value: 5 (0x00000005)

public static final int GESTURE_SWIPE_LEFT_AND_UP

Added in API level 16

The user has performed a left and up gesture on the touch screen.

Constant Value: 9 (0x00000009)

public static final int GESTURE_SWIPE_RIGHT

Added in API level 16

The user has performed a swipe right gesture on the touch screen.

Constant Value: 4 (0x00000004)

public static final int GESTURE_SWIPE_RIGHT_AND_DOWN

Added in API level 16

The user has performed a right and down gesture on the touch screen.

Constant Value: 12 (0x0000000c)

public static final int GESTURE_SWIPE_RIGHT_AND_LEFT

Added in API level 16

The user has performed a swipe right and left gesture on the touch screen.

Constant Value: 6 (0x00000006)

public static final int GESTURE_SWIPE_RIGHT_AND_UP

Added in API level 16

The user has performed a right and up gesture on the touch screen.

Constant Value: 11 (0x0000000b)

public static final int GESTURE_SWIPE_UP

Added in API level 16

The user has performed a swipe up gesture on the touch screen.

Constant Value: 1 (0x00000001)

public static final int GESTURE_SWIPE_UP_AND_DOWN

Added in API level 16

The user has performed a swipe up and down gesture on the touch screen.

Constant Value: 7 (0x00000007)

public static final int GESTURE_SWIPE_UP_AND_LEFT

Added in API level 16

The user has performed an up and left gesture on the touch screen.

Constant Value: 13 (0x0000000d)

public static final int GESTURE_SWIPE_UP_AND_RIGHT

Added in API level 16

The user has performed an up and right gesture on the touch screen.

Constant Value: 14 (0x0000000e)

public static final int GLOBAL_ACTION_BACK

Added in API level 16

Action to go back.

Constant Value: 1 (0x00000001)

public static final int GLOBAL_ACTION_HOME

Added in API level 16

Action to go home.

Constant Value: 2 (0x00000002)

public static final int GLOBAL_ACTION_NOTIFICATIONS

Added in API level 16

Action to open the notifications.

Constant Value: 4 (0x00000004)

public static final int GLOBAL_ACTION_POWER_DIALOG

Added in API level 21

Action to open the power long-press dialog.

Constant Value: 6 (0x00000006)

public static final int GLOBAL_ACTION_QUICK_SETTINGS

Added in API level 17

Action to open the quick settings.

Constant Value: 5 (0x00000005)

public static final int GLOBAL_ACTION_RECENTS

Added in API level 16

Action to open the recent apps.

Constant Value: 3 (0x00000003)

public static final String SERVICE_INTERFACE

Added in API level 4

The Intent that must be declared as handled by the service.

Constant Value: "android.accessibilityservice.AccessibilityService"

public static final String SERVICE_META_DATA

Added in API level 14

Name under which an AccessibilityService component publishes information about itself. This meta-data must reference an XML resource containing an <accessibility-service> tag. This is a a sample XML file configuring an accessibility service:

 <accessibility-service
     android:accessibilityEventTypes="typeViewClicked|typeViewFocused"
     android:packageNames="foo.bar, foo.baz"
     android:accessibilityFeedbackType="feedbackSpoken"
     android:notificationTimeout="100"
     android:accessibilityFlags="flagDefault"
     android:settingsActivity="foo.bar.TestBackActivity"
     android:canRetrieveWindowContent="true"
     android:canRequestTouchExplorationMode="true"
     android:canRequestEnhancedWebAccessibility="true"
     . . .
 />

Constant Value: "android.accessibilityservice"

Public Constructors

public AccessibilityService ()

Added in API level 4

Public Methods

public AccessibilityNodeInfo findFocus (int focus)

Added in API level 21

Find the view that has the specified focus type. The search is performed across all windows.

Note: In order to access the windows your service has to declare the capability to retrieve window content by setting the AccessibilityService_canRetrieveWindowContent property in its meta-data. For details refer to SERVICE_META_DATA. Also the service has to opt-in to retrieve the interactive windows by setting the FLAG_RETRIEVE_INTERACTIVE_WINDOWS flag.Otherwise, the search will be performed only in the active window.

Parameters

focus	The focus to find. One of `FOCUS_INPUT` or `FOCUS_ACCESSIBILITY`.

Returns

The node info of the focused view or null.

public AccessibilityNodeInfo getRootInActiveWindow ()

Added in API level 16

Gets the root node in the currently active window if this service can retrieve window content. The active window is the one that the user is currently touching or the window with input focus, if the user is not touching any window.

Note: In order to access the root node your service has to declare the capability to retrieve window content by setting the AccessibilityService_canRetrieveWindowContent property in its meta-data. For details refer to SERVICE_META_DATA.

Returns

The root node if this service can retrieve window content.

public final AccessibilityServiceInfo getServiceInfo ()

Added in API level 16

Gets the an AccessibilityServiceInfo describing this AccessibilityService. This method is useful if one wants to change some of the dynamically configurable properties at runtime.

Returns

The accessibility service info.

public Object getSystemService (String name)

Added in API level 4

Return the handle to a system-level service by name. The class of the returned object varies by the requested name. Currently available names are:

WINDOW_SERVICE ("window"): The top-level window manager in which you can place custom windows. The returned object is a WindowManager.
LAYOUT_INFLATER_SERVICE ("layout_inflater"): A LayoutInflater for inflating layout resources in this context.
ACTIVITY_SERVICE ("activity"): A ActivityManager for interacting with the global activity state of the system.
POWER_SERVICE ("power"): A PowerManager for controlling power management.
ALARM_SERVICE ("alarm"): A AlarmManager for receiving intents at the time of your choosing.
NOTIFICATION_SERVICE ("notification"): A NotificationManager for informing the user of background events.
KEYGUARD_SERVICE ("keyguard"): A KeyguardManager for controlling keyguard.
LOCATION_SERVICE ("location"): A LocationManager for controlling location (e.g., GPS) updates.
SEARCH_SERVICE ("search"): A SearchManager for handling search.
VIBRATOR_SERVICE ("vibrator"): A Vibrator for interacting with the vibrator hardware.
CONNECTIVITY_SERVICE ("connection"): A ConnectivityManager for handling management of network connections.
WIFI_SERVICE ("wifi"): A WifiManager for management of Wi-Fi connectivity.
WIFI_P2P_SERVICE ("wifip2p"): A WifiP2pManager for management of Wi-Fi Direct connectivity.
INPUT_METHOD_SERVICE ("input_method"): An InputMethodManager for management of input methods.
UI_MODE_SERVICE ("uimode"): An UiModeManager for controlling UI modes.
DOWNLOAD_SERVICE ("download"): A DownloadManager for requesting HTTP downloads
BATTERY_SERVICE ("batterymanager"): A BatteryManager for managing battery state
JOB_SCHEDULER_SERVICE ("taskmanager"): A JobScheduler for managing scheduled tasks

Note: System services obtained via this API may be closely associated with the Context in which they are obtained from. In general, do not share the service objects between various different contexts (Activities, Applications, Services, Providers, etc.)

Parameters

name	The name of the desired service.

Returns

The service or null if the name does not exist.

public List<AccessibilityWindowInfo> getWindows ()

Added in API level 21

Gets the windows on the screen. This method returns only the windows that a sighted user can interact with, as opposed to all windows. For example, if there is a modal dialog shown and the user cannot touch anything behind it, then only the modal window will be reported (assuming it is the top one). For convenience the returned windows are ordered in a descending layer order, which is the windows that are higher in the Z-order are reported first. Since the user can always interact with the window that has input focus by typing, the focused window is always returned (even if covered by a modal window).

Returns

The windows if there are windows and the service is can retrieve them, otherwise an empty list.

public abstract void onAccessibilityEvent (AccessibilityEvent event)

Added in API level 4

Callback for AccessibilityEvents.

Parameters

event	An event.

public final IBinder onBind (Intent intent)

Added in API level 4

Implement to return the implementation of the internal accessibility service interface.

Parameters

intent	The Intent that was used to bind to this service, as given to `Context.bindService`. Note that any extras that were included with the Intent at that point will not be seen here.

Returns

Return an IBinder through which clients can call on to the service.

public abstract void onInterrupt ()

Added in API level 4

Callback for interrupting the accessibility feedback.

public final boolean performGlobalAction (int action)

Added in API level 16

Performs a global action. Such an action can be performed at any moment regardless of the current application or user location in that application. For example going back, going home, opening recents, etc.

Parameters

action	The action to perform.

Returns

Whether the action was successfully performed.

public final void setServiceInfo (AccessibilityServiceInfo info)

Added in API level 4

Sets the AccessibilityServiceInfo that describes this service.

Note: You can call this method any time but the info will be picked up after the system has bound to this service and when this method is called thereafter.

Parameters

info	The info.

Protected Methods

protected boolean onGesture (int gestureId)

Added in API level 16

Called by the system when the user performs a specific gesture on the touch screen. Note: To receive gestures an accessibility service must request that the device is in touch exploration mode by setting the FLAG_REQUEST_TOUCH_EXPLORATION_MODE flag.

Parameters

gestureId	The unique id of the performed gesture.

Returns

Whether the gesture was handled.

protected boolean onKeyEvent (KeyEvent event)

Added in API level 18

Callback that allows an accessibility service to observe the key events before they are passed to the rest of the system. This means that the events are first delivered here before they are passed to the device policy, the input method, or applications.

Note: It is important that key events are handled in such a way that the event stream that would be passed to the rest of the system is well-formed. For example, handling the down event but not the up event and vice versa would generate an inconsistent event stream.

Note: The key events delivered in this method are copies and modifying them will have no effect on the events that will be passed to the system. This method is intended to perform purely filtering functionality.

Parameters

event	The event to be processed.

Returns

If true then the event will be consumed and not delivered to applications, otherwise it will be delivered as usual.

protected void onServiceConnected ()

Added in API level 4

This method is a part of the AccessibilityService lifecycle and is called after the system has successfully bound to the service. If is convenient to use this method for setting the AccessibilityServiceInfo.

Results

Classes

AccessibilityService

Class Overview

Developer Guides

Lifecycle

Declaration

Configuration

Retrieving window content

Notification strategy

Event types

Feedback types

See Also

Summary

Constants

public static final int GESTURE_SWIPE_DOWN

public static final int GESTURE_SWIPE_DOWN_AND_LEFT

public static final int GESTURE_SWIPE_DOWN_AND_RIGHT

public static final int GESTURE_SWIPE_DOWN_AND_UP

public static final int GESTURE_SWIPE_LEFT

public static final int GESTURE_SWIPE_LEFT_AND_DOWN

public static final int GESTURE_SWIPE_LEFT_AND_RIGHT

public static final int GESTURE_SWIPE_LEFT_AND_UP

public static final int GESTURE_SWIPE_RIGHT

public static final int GESTURE_SWIPE_RIGHT_AND_DOWN

public static final int GESTURE_SWIPE_RIGHT_AND_LEFT

public static final int GESTURE_SWIPE_RIGHT_AND_UP

public static final int GESTURE_SWIPE_UP

public static final int GESTURE_SWIPE_UP_AND_DOWN

public static final int GESTURE_SWIPE_UP_AND_LEFT

public static final int GESTURE_SWIPE_UP_AND_RIGHT

public static final int GLOBAL_ACTION_BACK

public static final int GLOBAL_ACTION_HOME

public static final int GLOBAL_ACTION_NOTIFICATIONS

public static final int GLOBAL_ACTION_POWER_DIALOG

public static final int GLOBAL_ACTION_QUICK_SETTINGS

public static final int GLOBAL_ACTION_RECENTS

public static final String SERVICE_INTERFACE

public static final String SERVICE_META_DATA

Public Constructors

public AccessibilityService ()

Public Methods

public AccessibilityNodeInfo findFocus (int focus)

Parameters

Returns

See Also

public AccessibilityNodeInfo getRootInActiveWindow ()

Returns

public final AccessibilityServiceInfo getServiceInfo ()

Returns

See Also

public Object getSystemService (String name)

Parameters

Returns

public List<AccessibilityWindowInfo> getWindows ()

Returns

public abstract void onAccessibilityEvent (AccessibilityEvent event)

Parameters

public final IBinder onBind (Intent intent)

Parameters

Returns

public abstract void onInterrupt ()

public final boolean performGlobalAction (int action)

Parameters

Returns

See Also

public final void setServiceInfo (AccessibilityServiceInfo info)

Parameters

Protected Methods

protected boolean onGesture (int gestureId)

Parameters

Returns

See Also

protected boolean onKeyEvent (KeyEvent event)

Parameters

Returns

protected void onServiceConnected ()

See Also