public class

ActivityGroup

extends Activity

java.lang.Object
↳	android.content.Context
	↳	android.content.ContextWrapper
		↳	android.view.ContextThemeWrapper
			↳	android.app.Activity
				↳	android.app.ActivityGroup

Known Direct Subclasses

TabActivity

Class Overview

A screen that contains and runs multiple embedded activities.

Summary

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Inherited Constants

From class android.app.Activity

From class android.content.Context

Public Constructors
	ActivityGroup()
	ActivityGroup(boolean singleActivityMode)

Public Methods
Activity	getCurrentActivity()
final LocalActivityManager	getLocalActivityManager()

Protected Methods
void	onCreate(Bundle savedInstanceState) Called when the activity is starting.
void	onDestroy() Perform any final cleanup before an activity is destroyed.
void	onPause() Called as part of the activity lifecycle when an activity is going into the background, but has not (yet) been killed.
void	onResume() Called after onRestoreInstanceState(Bundle), onRestart(), or onPause(), for your activity to start interacting with the user.
void	onSaveInstanceState(Bundle outState) Called to retrieve per-instance state from an activity before being killed so that the state can be restored in onCreate(Bundle) or onRestoreInstanceState(Bundle) (the Bundle populated by this method will be passed to both).
void	onStop() Called when you are no longer visible to the user.

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Inherited Methods

From class android.app.Activity

From class android.view.ContextThemeWrapper

From class android.content.ContextWrapper

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() Remove any currently set wallpaper, reverting to the system's default wallpaper.
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 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 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.
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 PackageManager	getPackageManager() Return PackageManager instance to find global package information.
abstract String	getPackageName() Return the name of this application's 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, 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...).
final String	getString(int resId) Return a localized string from the application's package's default string table.
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() Like peekWallpaper(), but always returns a valid Drawable.
abstract int	getWallpaperDesiredMinimumHeight() Returns the desired minimum height for the wallpaper.
abstract int	getWallpaperDesiredMinimumWidth() Returns the desired minimum width for the wallpaper.
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.
final TypedArray	obtainStyledAttributes(int resid, 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(int[] attrs) 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.
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 Drawable	peekWallpaper() Retrieve the current system wallpaper.
abstract Intent	registerReceiver(BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler) Register to receive intent broadcasts, to run in the context of `scheduler`.
abstract Intent	registerReceiver(BroadcastReceiver receiver, IntentFilter filter) Register a BroadcastReceiver to be run in the main activity thread.
abstract void	removeStickyBroadcast(Intent intent) Remove the data previously sent with sendStickyBroadcast(Intent), so that it is as if the sticky broadcast had never happened.
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) Broadcast the given intent to all interested BroadcastReceivers.
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	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	sendStickyBroadcast(Intent intent) Perform a sendBroadcast(Intent) that is "sticky," meaning the Intent you are sending stays around after the broadcast is complete, so that others can quickly retrieve that data through the return value of registerReceiver(BroadcastReceiver, IntentFilter).
abstract void	setTheme(int resid) Set the base theme for this context.
abstract void	setWallpaper(InputStream data) Change the current system wallpaper to a specific byte stream.
abstract void	setWallpaper(Bitmap bitmap) Change the current system wallpaper to a bitmap.
abstract void	startActivity(Intent intent) Launch a new activity.
abstract boolean	startInstrumentation(ComponentName className, String profileFile, Bundle arguments) Start executing an Instrumentation class.
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.
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() Is called before the object's memory is being reclaimed by the VM.
final Class<? extends Object>	getClass() Returns the unique instance of Class which 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(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.
final void	wait() Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.

From interface android.content.ComponentCallbacks

From interface android.view.KeyEvent.Callback

From interface android.view.LayoutInflater.Factory

From interface android.view.View.OnCreateContextMenuListener

From interface android.view.Window.Callback

abstract boolean	dispatchKeyEvent(KeyEvent event) Called to process key events.
abstract boolean	dispatchTouchEvent(MotionEvent event) Called to process touch screen events.
abstract boolean	dispatchTrackballEvent(MotionEvent event) Called to process trackball events.
abstract void	onContentChanged() This hook is called whenever the content view of the screen changes (due to a call to Window.setContentView or Window.addContentView).
abstract boolean	onCreatePanelMenu(int featureId, Menu menu) Initialize the contents of the menu for panel 'featureId'.
abstract View	onCreatePanelView(int featureId) Instantiate the view to display in the panel for 'featureId'.
abstract boolean	onMenuItemSelected(int featureId, MenuItem item) Called when a panel's menu item has been selected by the user.
abstract boolean	onMenuOpened(int featureId, Menu menu) Called when a panel's menu is opened by the user.
abstract void	onPanelClosed(int featureId, Menu menu) Called when a panel is being closed.
abstract boolean	onPreparePanel(int featureId, View view, Menu menu) Prepare a panel to be displayed.
abstract boolean	onSearchRequested() Called when the user signals the desire to start a search.
abstract void	onWindowAttributesChanged(WindowManager.LayoutParams attrs) This is called whenever the current window attributes change.
abstract void	onWindowFocusChanged(boolean hasFocus) This hook is called whenever the window focus changes.

Public Constructors

public ActivityGroup ()

public ActivityGroup (boolean singleActivityMode)

Public Methods

public Activity getCurrentActivity ()

public final LocalActivityManager getLocalActivityManager ()

Protected Methods

protected void onCreate (Bundle savedInstanceState)

Called when the activity is starting. This is where most initialization should go: calling setContentView(int) to inflate the activity's UI, using findViewById(int) to programmatically interact with widgets in the UI, calling managedQuery(android.net.Uri, String[], String, String[], String) to retrieve cursors for data being displayed, etc.

You can call finish() from within this function, in which case onDestroy() will be immediately called without any of the rest of the activity lifecycle (onStart(), onResume(), onPause(), etc) executing.

Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown.

Parameters

savedInstanceState	If the activity is being re-initialized after previously being shut down then this Bundle contains the data it most recently supplied in onSaveInstanceState(Bundle). *Note: Otherwise it is null.*

protected void onDestroy ()

Perform any final cleanup before an activity is destroyed. This can happen either because the activity is finishing (someone called finish() on it, or because the system is temporarily destroying this instance of the activity to save space. You can distinguish between these two scenarios with the isFinishing() method.

Note: do not count on this method being called as a place for saving data! For example, if an activity is editing data in a content provider, those edits should be committed in either onPause() or onSaveInstanceState(Bundle), not here. This method is usually implemented to free resources like threads that are associated with an activity, so that a destroyed activity does not leave such things around while the rest of its application is still running. There are situations where the system will simply kill the activity's hosting process without calling this method (or any others) in it, so it should not be used to do things that are intended to remain around after the process goes away.

Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown.

protected void onPause ()

Called as part of the activity lifecycle when an activity is going into the background, but has not (yet) been killed. The counterpart to onResume().

When activity B is launched in front of activity A, this callback will be invoked on A. B will not be created until A's onPause() returns, so be sure to not do anything lengthy here.

This callback is mostly used for saving any persistent state the activity is editing, to present a "edit in place" model to the user and making sure nothing is lost if there are not enough resources to start the new activity without first killing this one. This is also a good place to do things like stop animations and other things that consume a noticeable mount of CPU in order to make the switch to the next activity as fast as possible, or to close resources that are exclusive access such as the camera.

In situations where the system needs more memory it may kill paused processes to reclaim resources. Because of this, you should be sure that all of your state is saved by the time you return from this function. In general onSaveInstanceState(Bundle) is used to save per-instance state in the activity and this method is used to store global persistent data (in content providers, files, etc.)

After receiving this call you will usually receive a following call to onStop() (after the next activity has been resumed and displayed), however in some cases there will be a direct call back to onResume() without going through the stopped state.

Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown.

protected void onResume ()

Called after onRestoreInstanceState(Bundle), onRestart(), or onPause(), for your activity to start interacting with the user. This is a good place to begin animations, open exclusive-access devices (such as the camera), etc.

Keep in mind that onResume is not the best indicator that your activity is visible to the user; a system window such as the keyguard may be in front. Use onWindowFocusChanged(boolean) to know for certain that your activity is visible to the user (for example, to resume a game).

Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown.

protected void onSaveInstanceState (Bundle outState)

Called to retrieve per-instance state from an activity before being killed so that the state can be restored in onCreate(Bundle) or onRestoreInstanceState(Bundle) (the Bundle populated by this method will be passed to both).

This method is called before an activity may be killed so that when it comes back some time in the future it can restore its state. For example, if activity B is launched in front of activity A, and at some point activity A is killed to reclaim resources, activity A will have a chance to save the current state of its user interface via this method so that when the user returns to activity A, the state of the user interface can be restored via onCreate(Bundle) or onRestoreInstanceState(Bundle).

Do not confuse this method with activity lifecycle callbacks such as onPause(), which is always called when an activity is being placed in the background or on its way to destruction, or onStop() which is called before destruction. One example of when onPause() and onStop() is called and not this method is when a user navigates back from activity B to activity A: there is no need to call onSaveInstanceState(Bundle) on B because that particular instance will never be restored, so the system avoids calling it. An example when onPause() is called and not onSaveInstanceState(Bundle) is when activity B is launched in front of activity A: the system may avoid calling onSaveInstanceState(Bundle) on activity A if it isn't killed during the lifetime of B since the state of the user interface of A will stay intact.

The default implementation takes care of most of the UI per-instance state for you by calling onSaveInstanceState() on each view in the hierarchy that has an id, and by saving the id of the currently focused view (all of which is restored by the default implementation of onRestoreInstanceState(Bundle)). If you override this method to save additional information not captured by each individual view, you will likely want to call through to the default implementation, otherwise be prepared to save all of the state of each view yourself.

If called, this method will occur before onStop(). There are no guarantees about whether it will occur before or after onPause().

Parameters

outState	Bundle in which to place your saved state.

protected void onStop ()

Called when you are no longer visible to the user. You will next receive either onRestart(), onDestroy(), or nothing, depending on later user activity.

Note that this method may never be called, in low memory situations where the system does not have enough memory to keep your activity's process running after its onPause() method is called.

Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown.

Interfaces

Classes

Exceptions

ActivityGroup

Class Overview

Summary

Public Constructors

public ActivityGroup ()

public ActivityGroup (boolean singleActivityMode)

Public Methods

public Activity getCurrentActivity ()

public final LocalActivityManager getLocalActivityManager ()

Protected Methods

protected void onCreate (Bundle savedInstanceState)

Parameters

protected void onDestroy ()

protected void onPause ()

protected void onResume ()

protected void onSaveInstanceState (Bundle outState)

Parameters

protected void onStop ()