Application

extends ContextWrapper
implements ComponentCallbacks

java.lang.Object
↳	android.content.Context
	↳	android.content.ContextWrapper
		↳	android.app.Application

Known Direct Subclasses

MockApplication

Class Overview

Base class for those who need to maintain global application state. You can provide your own implementation by specifying its name in your AndroidManifest.xml's <application> tag, which will cause that class to be instantiated for you when the process for your application/package is created.

Summary

[Expand]

Inherited Constants

From class android.content.Context

Public Constructors
	Application()

Public Methods
void	onConfigurationChanged(Configuration newConfig) Called by the system when the device configuration changes while your component is running.
void	onCreate() Called when the application is starting, before any other application objects have been created.
void	onLowMemory() This is called when the overall system is running low on memory, and would like actively running process to try to tighten their belt.
void	onTerminate() Called when the application is stopping.

[Expand]

Inherited Methods

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

Public Constructors

public Application ()

Public Methods

public void onConfigurationChanged (Configuration newConfig)

Called by the system when the device configuration changes while your component is running. Note that, unlike activities, other components are never restarted when a configuration changes: they must always deal with the results of the change, such as by re-retrieving resources.

At the time that this function has been called, your Resources object will have been updated to return resource values matching the new configuration.

Parameters

newConfig	The new device configuration.

public void onCreate ()

Called when the application is starting, before any other application objects have been created. Implementations should be as quick as possible (for example using lazy initialization of state) since the time spent in this function directly impacts the performance of starting the first activity, service, or receiver in a process. If you override this method, be sure to call super.onCreate().

public void onLowMemory ()

This is called when the overall system is running low on memory, and would like actively running process to try to tighten their belt. While the exact point at which this will be called is not defined, generally it will happen around the time all background process have been killed, that is before reaching the point of killing processes hosting service and foreground UI that we would like to avoid killing.

Applications that want to be nice can implement this method to release any caches or other unnecessary resources they may be holding on to. The system will perform a gc for you after returning from this method.

public void onTerminate ()

Called when the application is stopping. There are no more application objects running and the process will exit. Note: never depend on this method being called; in many cases an unneeded application process will simply be killed by the kernel without executing any application code. If you override this method, be sure to call super.onTerminate().

Interfaces

Classes

Exceptions