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android.content
Class Context

java.lang.Object
  android.content.Context

Direct Known Subclasses:: ApplicationContext, ContextWrapper, MockContext

public abstract class Context
extends Object
extends Object

Interface to global information about an application environment. This is an abstract class whose implementation is provided by the Android system. It allows access to application-specific resources and classes, as well as up-calls for application-level operations such as launching activities, broadcasting and receiving intents, etc.

Field Summary
`static String`	`ACTIVITY_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `ActivityManager` for interacting with the global system state.
`static String`	`ALARM_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `AlarmManager` for receiving intents at a time of your choosing.
`static String`	`AUDIO_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `AudioManager` for handling management of volume, ringer modes and audio routing.
`static int`	`BIND_AUTO_CREATE` Flag for `bindService(android.content.Intent, android.content.ServiceConnection, int)`: automatically create the service as long as the binding exists.
`static int`	`BIND_DEBUG_UNBIND` Flag for `bindService(android.content.Intent, android.content.ServiceConnection, int)`: include debugging help for mismatched calls to unbind.
`static String`	`BLUETOOTH_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `BluetoothDevice` for interacting with Bluetooth.
`static String`	`CLIPBOARD_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `ClipboardManager` for accessing and modifying the contents of the global clipboard.
`static String`	`CONNECTIVITY_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `ConnectivityManager` for handling management of network connections.
`static int`	`CONTEXT_IGNORE_SECURITY` Flag for use with `createPackageContext(java.lang.String, int)`: ignore any security restrictions on the Context being requested, allowing it to always be loaded.
`static int`	`CONTEXT_INCLUDE_CODE` Flag for use with `createPackageContext(java.lang.String, int)`: include the application code with the context.
`static String`	`KEYGUARD_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `NotificationManager` for controlling keyguard.
`static String`	`LAYOUT_INFLATER_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `LayoutInflater` for inflating layout resources in this context.
`static String`	`LOCATION_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `LocationManager` for controlling location updates.
`static int`	`MODE_APPEND` File creation mode: for use with `openFileOutput(java.lang.String, int)`, if the file already exists then write data to the end of the existing file instead of erasing it.
`static int`	`MODE_PRIVATE` File creation mode: the default mode, where the created file can only be accessed by the calling application (or all applications sharing the same user ID).
`static int`	`MODE_WORLD_READABLE` File creation mode: allow all other applications to have read access to the created file.
`static int`	`MODE_WORLD_WRITEABLE` File creation mode: allow all other applications to have write access to the created file.
`static String`	`NOTIFICATION_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `NotificationManager` for informing the user of background events.
`static String`	`POWER_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `PowerManager` for controlling power management, including "wake locks," which let you keep the device on while you're running long tasks.
`static String`	`SEARCH_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `SearchManager` for handling searches.
`static String`	`SENSOR_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `SensorManager` for accessing sensors.
`static String`	`STATUS_BAR_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `StatusBarManager` for interacting with the status bar.
`static String`	`TELEPHONY_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `TelephonyManager` for handling management the telephony features of the device.
`static String`	`VIBRATOR_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `Vibrator` for interacting with the vibration hardware.
`static String`	`WALLPAPER_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a com.android.server.WallpaperService for accessing wallpapers.
`static String`	`WIFI_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `WifiManager` for handling management of Wi-Fi access.
`static String`	`WINDOW_SERVICE` Use with `getSystemService(java.lang.String)` to retrieve a `WindowManager` for accessing the system's window manager.

Constructor Summary
`Context()`

Method Summary
`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(java.lang.String, int, android.database.sqlite.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`	`getFilesDir()` Returns the absolute path to the directory on the filesystem where files created with `openFileOutput(java.lang.String, int)` are stored.
`abstract File`	`getFileStreamPath(String name)` Returns the absolute path on the filesystem where a file created with `openFileOutput(java.lang.String, int)` is stored.
`abstract Looper`	`getMainLooper()` Return the Looper for the main thread of the current process.
`abstract String`	`getPackageCodePath()` Return the full path to this context's code and asset files.
`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 resource files.
`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.
`String`	`getString(int resId)` Return a localized string from the application's package's default string table.
`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 `String.format(java.lang.String, java.lang.Object...)`.
`abstract Object`	`getSystemService(String name)` Return the handle to a system-level service by name.
`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.
`TypedArray`	`obtainStyledAttributes(AttributeSet set, int[] attrs)` Retrieve styled attribute information in this Context's theme.
`TypedArray`	`obtainStyledAttributes(AttributeSet set, int[] attrs, int defStyleAttr, int defStyleRes)` Retrieve styled attribute information in this Context's theme.
`TypedArray`	`obtainStyledAttributes(int[] attrs)` Retrieve styled attribute information in this Context's theme.
`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 Drawable`	`peekWallpaper()` Retrieve the current system wallpaper.
`abstract Intent`	`registerReceiver(BroadcastReceiver receiver, IntentFilter filter)` Register an 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)` Remove the data previously sent with `sendStickyBroadcast(android.content.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(java.lang.String, android.net.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)` 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`	`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`	`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(Bitmap bitmap)` Change the current system wallpaper to a bitmap.
`abstract void`	`setWallpaper(InputStream data)` Change the current system wallpaper to a specific byte stream.
`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.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

MODE_PRIVATE

public static final int MODE_PRIVATE

File creation mode: the default mode, where the created file can only be accessed by the calling application (or all applications sharing the same user ID).

See Also:: MODE_WORLD_READABLE, MODE_WORLD_WRITEABLE, Constant Field Values

MODE_WORLD_READABLE

public static final int MODE_WORLD_READABLE

File creation mode: allow all other applications to have read access to the created file.

See Also:: MODE_PRIVATE, MODE_WORLD_WRITEABLE, Constant Field Values

MODE_WORLD_WRITEABLE

public static final int MODE_WORLD_WRITEABLE

File creation mode: allow all other applications to have write access to the created file.

See Also:: MODE_PRIVATE, MODE_WORLD_READABLE, Constant Field Values

MODE_APPEND

public static final int MODE_APPEND

File creation mode: for use with openFileOutput(java.lang.String, int), if the file already exists then write data to the end of the existing file instead of erasing it.

See Also:: openFileOutput(java.lang.String, int), Constant Field Values

BIND_AUTO_CREATE

public static final int BIND_AUTO_CREATE

Flag for bindService(android.content.Intent, android.content.ServiceConnection, int): automatically create the service as long as the binding exists. Note that while this will create the service, its Service.onStart(android.content.Intent, int) method will still only be called due to an explicit call to startService(android.content.Intent). Even without that, though, this still provides you with access to the service object while the service is created.

Specifying this flag also tells the system to treat the service as being as important as your own process -- that is, when deciding which process should be killed to free memory, the service will only be considered a candidate as long as the processes of any such bindings is also a candidate to be killed. This is to avoid situations where the service is being continually created and killed due to low memory.

See Also:: Constant Field Values

BIND_DEBUG_UNBIND

public static final int BIND_DEBUG_UNBIND

Flag for bindService(android.content.Intent, android.content.ServiceConnection, int): include debugging help for mismatched calls to unbind. When this flag is set, the callstack of the following unbindService(android.content.ServiceConnection) call is retained, to be printed if a later incorrect unbind call is made. Note that doing this requires retaining information about the binding that was made for the lifetime of the app, resulting in a leak -- this should only be used for debugging.

See Also:: Constant Field Values

POWER_SERVICE

public static final String POWER_SERVICE

Use with getSystemService(java.lang.String) to retrieve a PowerManager for controlling power management, including "wake locks," which let you keep the device on while you're running long tasks.

See Also:: Constant Field Values

WINDOW_SERVICE

public static final String WINDOW_SERVICE

Use with getSystemService(java.lang.String) to retrieve a WindowManager for accessing the system's window manager.

See Also:: getSystemService(java.lang.String), WindowManager, Constant Field Values

LAYOUT_INFLATER_SERVICE

public static final String LAYOUT_INFLATER_SERVICE

Use with getSystemService(java.lang.String) to retrieve a LayoutInflater for inflating layout resources in this context.

See Also:: getSystemService(java.lang.String), LayoutInflater, Constant Field Values

ACTIVITY_SERVICE

public static final String ACTIVITY_SERVICE

Use with getSystemService(java.lang.String) to retrieve a ActivityManager for interacting with the global system state.

See Also:: getSystemService(java.lang.String), ActivityManager, Constant Field Values

ALARM_SERVICE

public static final String ALARM_SERVICE

Use with getSystemService(java.lang.String) to retrieve a AlarmManager for receiving intents at a time of your choosing.

See Also:: getSystemService(java.lang.String), AlarmManager, Constant Field Values

NOTIFICATION_SERVICE

public static final String NOTIFICATION_SERVICE

Use with getSystemService(java.lang.String) to retrieve a NotificationManager for informing the user of background events.

See Also:: getSystemService(java.lang.String), NotificationManager, Constant Field Values

KEYGUARD_SERVICE

public static final String KEYGUARD_SERVICE

Use with getSystemService(java.lang.String) to retrieve a NotificationManager for controlling keyguard.

See Also:: getSystemService(java.lang.String), KeyguardManager, Constant Field Values

LOCATION_SERVICE

public static final String LOCATION_SERVICE

Use with getSystemService(java.lang.String) to retrieve a LocationManager for controlling location updates.

See Also:: getSystemService(java.lang.String), LocationManager, Constant Field Values

SEARCH_SERVICE

public static final String SEARCH_SERVICE

Use with getSystemService(java.lang.String) to retrieve a SearchManager for handling searches.

See Also:: getSystemService(java.lang.String), SearchManager, Constant Field Values

SENSOR_SERVICE

public static final String SENSOR_SERVICE

Use with getSystemService(java.lang.String) to retrieve a SensorManager for accessing sensors.

See Also:: getSystemService(java.lang.String), SensorManager, Constant Field Values

BLUETOOTH_SERVICE

public static final String BLUETOOTH_SERVICE

Use with getSystemService(java.lang.String) to retrieve a BluetoothDevice for interacting with Bluetooth.

See Also:: getSystemService(java.lang.String), BluetoothDevice, Constant Field Values

WALLPAPER_SERVICE

public static final String WALLPAPER_SERVICE

Use with getSystemService(java.lang.String) to retrieve a com.android.server.WallpaperService for accessing wallpapers.

See Also:: getSystemService(java.lang.String), Constant Field Values

VIBRATOR_SERVICE

public static final String VIBRATOR_SERVICE

Use with getSystemService(java.lang.String) to retrieve a Vibrator for interacting with the vibration hardware.

See Also:: getSystemService(java.lang.String), Vibrator, Constant Field Values

STATUS_BAR_SERVICE

public static final String STATUS_BAR_SERVICE

Use with getSystemService(java.lang.String) to retrieve a StatusBarManager for interacting with the status bar.

See Also:: getSystemService(java.lang.String), StatusBarManager, Constant Field Values

CONNECTIVITY_SERVICE

public static final String CONNECTIVITY_SERVICE

Use with getSystemService(java.lang.String) to retrieve a ConnectivityManager for handling management of network connections.

See Also:: getSystemService(java.lang.String), ConnectivityManager, Constant Field Values

WIFI_SERVICE

public static final String WIFI_SERVICE

Use with getSystemService(java.lang.String) to retrieve a WifiManager for handling management of Wi-Fi access.

See Also:: getSystemService(java.lang.String), WifiManager, Constant Field Values

AUDIO_SERVICE

public static final String AUDIO_SERVICE

Use with getSystemService(java.lang.String) to retrieve a AudioManager for handling management of volume, ringer modes and audio routing.

See Also:: getSystemService(java.lang.String), AudioManager, Constant Field Values

TELEPHONY_SERVICE

public static final String TELEPHONY_SERVICE

Use with getSystemService(java.lang.String) to retrieve a TelephonyManager for handling management the telephony features of the device.

See Also:: getSystemService(java.lang.String), TelephonyManager, Constant Field Values

CLIPBOARD_SERVICE

public static final String CLIPBOARD_SERVICE

Use with getSystemService(java.lang.String) to retrieve a ClipboardManager for accessing and modifying the contents of the global clipboard.

See Also:: getSystemService(java.lang.String), ClipboardManager, Constant Field Values

CONTEXT_INCLUDE_CODE

public static final int CONTEXT_INCLUDE_CODE

Flag for use with createPackageContext(java.lang.String, int): include the application code with the context. This means loading code into the caller's process, so that getClassLoader() can be used to instantiate the application's classes. Setting this flags imposes security restrictions on what application context you can access; if the requested application can not be safely loaded into your process, java.lang.SecurityException will be thrown. If this flag is not set, there will be no restrictions on the packages that can be loaded, but getClassLoader() will always return the default system class loader.

See Also:: Constant Field Values

CONTEXT_IGNORE_SECURITY

public static final int CONTEXT_IGNORE_SECURITY

Flag for use with createPackageContext(java.lang.String, int): ignore any security restrictions on the Context being requested, allowing it to always be loaded. For use with CONTEXT_INCLUDE_CODE to allow code to be loaded into a process even when it isn't safe to do so. Use with extreme care!

See Also:: Constant Field Values

Constructor Detail

Context

public Context()

Method Detail

getAssets

public abstract AssetManager getAssets()

Return an AssetManager instance for your application's package.

getResources

public abstract Resources getResources()

Return a Resources instance for your application's package.

getPackageManager

public abstract PackageManager getPackageManager()

Return PackageManager instance to find global package information.

getContentResolver

public abstract ContentResolver getContentResolver()

Return a ContentResolver instance for your application's package.

getMainLooper

public abstract Looper getMainLooper()

Return the Looper for the main thread of the current process. This is the thread used to dispatch calls to application components (activities, services, etc).

getApplicationContext

public abstract Context getApplicationContext()

Return the context of the single, global Application object of the current process.

getText

public final CharSequence getText(int resId)

Return a localized, styled CharSequence from the application's package's default string table.

Parameters:: resId - Resource id for the CharSequence text

getString

public final String getString(int resId)

Return a localized string from the application's package's default string table.

Parameters:: resId - Resource id for the string

getString

public 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 String.format(java.lang.String, java.lang.Object...).

Parameters:: resId - Resource id for the format string; formatArgs - The format arguments that will be used for substitution.

setTheme

public abstract void setTheme(int resid)

Set the base theme for this context. Note that this should be called before any views are instantiated in the Context (for example before calling Activity.setContentView(int) or LayoutInflater.inflate(int, android.view.ViewGroup)).

Parameters:: resid - The style resource describing the theme.

getTheme

public abstract Resources.Theme getTheme()

Return the Theme object associated with this Context.

obtainStyledAttributes

public final TypedArray obtainStyledAttributes(int[] attrs)

Retrieve styled attribute information in this Context's theme. See Resources.Theme#obtainStyledAttributes(int[]) for more information.

See Also:: Resources.Theme#obtainStyledAttributes(int[])

obtainStyledAttributes

public final TypedArray obtainStyledAttributes(int resid,
                                               int[] attrs)
                                        throws Resources.NotFoundException

Retrieve styled attribute information in this Context's theme. See Resources.Theme#obtainStyledAttributes(int, int[]) for more information.

Throws:: Resources.NotFoundException
See Also:: Resources.Theme#obtainStyledAttributes(int, int[])

obtainStyledAttributes

public final TypedArray obtainStyledAttributes(AttributeSet set,
                                               int[] attrs)

Retrieve styled attribute information in this Context's theme. See Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int) for more information.

See Also:: Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)

obtainStyledAttributes

public final TypedArray obtainStyledAttributes(AttributeSet set,
                                               int[] attrs,
                                               int defStyleAttr,
                                               int defStyleRes)

Retrieve styled attribute information in this Context's theme. See Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int) for more information.

See Also:: Resources.Theme#obtainStyledAttributes(AttributeSet, int[], int, int)

getClassLoader

public abstract ClassLoader getClassLoader()

Return a class loader you can use to retrieve classes in this package.

getPackageName

public abstract String getPackageName()

Return the name of this application's package.

getPackageResourcePath

public abstract String getPackageResourcePath()

Return the full path to this context's resource files. This is the ZIP files containing the application's resources.

Note: this is not generally useful for applications, since they should not be directly accessing the file system.

Returns:: String Path to the resources.

getPackageCodePath

public abstract String getPackageCodePath()

Return the full path to this context's code and asset files. This is the ZIP files containing the application's code and assets.

Note: this is not generally useful for applications, since they should not be directly accessing the file system.

Returns:: String Path to the code and assets.

getSharedPreferences

public 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. Only one instance of the SharedPreferences object is returned to any callers for the same name, meaning they will see each other's edits as soon as they are made.

Parameters:: name - Desired preferences file. If a preferences file by this name does not exist, it will be created when you retrieve an editor (SharedPreferences.edit()) and then commit changes (Editor.commit()).; mode - Operating mode. Use 0 or MODE_PRIVATE for the default operation, MODE_WORLD_READABLE and MODE_WORLD_WRITEABLE to control permissions.
Returns:: Returns the single SharedPreferences instance that can be used to retrieve and modify the preference values.
See Also:: MODE_PRIVATE, MODE_WORLD_READABLE, MODE_WORLD_WRITEABLE

openFileInput

public abstract FileInputStream openFileInput(String name)
                                       throws FileNotFoundException

Open a private file associated with this Context's application package for reading.

Parameters:: name - The name of the file to open; can not contain path separators.
Returns:: FileInputStream Resulting input stream.
Throws:: FileNotFoundException
See Also:: openFileOutput(java.lang.String, int), fileList(), deleteFile(java.lang.String), FileInputStream.FileInputStream(String)

openFileOutput

public abstract FileOutputStream openFileOutput(String name,
                                                int mode)
                                         throws FileNotFoundException

Open a private file associated with this Context's application package for writing. Creates the file if it doesn't already exist.

Parameters:: name - The name of the file to open; can not contain path separators.; mode - Operating mode. Use 0 or MODE_PRIVATE for the default operation, MODE_APPEND to append to an existing file, MODE_WORLD_READABLE and MODE_WORLD_WRITEABLE to control permissions.
Returns:: FileOutputStream Resulting output stream.
Throws:: FileNotFoundException
See Also:: MODE_APPEND, MODE_PRIVATE, MODE_WORLD_READABLE, MODE_WORLD_WRITEABLE, openFileInput(java.lang.String), fileList(), deleteFile(java.lang.String), FileOutputStream.FileOutputStream(String)

deleteFile

public abstract boolean deleteFile(String name)

Delete the given private file associated with this Context's application package.

Parameters:: name - The name of the file to delete; can not contain path separators.
Returns:: True if the file was successfully deleted; else false.
See Also:: openFileInput(java.lang.String), openFileOutput(java.lang.String, int), fileList(), File.delete()

getFileStreamPath

public abstract File getFileStreamPath(String name)

Returns the absolute path on the filesystem where a file created with openFileOutput(java.lang.String, int) is stored.

Parameters:: name - The name of the file for which you would like to get its path.
Returns:: Returns an absolute path to the given file.
See Also:: openFileOutput(java.lang.String, int), getFilesDir(), getDir(java.lang.String, int)

getFilesDir

public abstract File getFilesDir()

Returns the absolute path to the directory on the filesystem where files created with openFileOutput(java.lang.String, int) are stored.

Returns:: Returns the path of the directory holding application files.
See Also:: openFileOutput(java.lang.String, int), getFileStreamPath(java.lang.String), getDir(java.lang.String, int)

getCacheDir

public abstract File getCacheDir()

Returns the absolute path to the application specific cache directory on the filesystem. These files will be ones that get deleted first when the device runs low on storage There is no guarantee when these files will be deleted.

Returns:: Returns the path of the directory holding application cache files.
See Also:: openFileOutput(java.lang.String, int), getFileStreamPath(java.lang.String), getDir(java.lang.String, int)

fileList

public abstract String[] fileList()

Returns an array of strings naming the private files associated with this Context's application package.

Returns:: Array of strings naming the private files.
See Also:: openFileInput(java.lang.String), openFileOutput(java.lang.String, int), deleteFile(java.lang.String)

getDir

public 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. You can use the returned File object to create and access files in this directory. Note that files created through a File object will only be accessible by your own application; you can only set the mode of the entire directory, not of individual files.

Parameters:: name - Name of the directory to retrieve. This is a directory that is created as part of your application data.; mode - Operating mode. Use 0 or MODE_PRIVATE for the default operation, MODE_WORLD_READABLE and MODE_WORLD_WRITEABLE to control permissions.
Returns:: Returns a File object for the requested directory. The directory will have been created if it does not already exist.
See Also:: openFileOutput(String, int)

openOrCreateDatabase

public abstract SQLiteDatabase openOrCreateDatabase(String name,
                                                    int mode,
                                                    SQLiteDatabase.CursorFactory factory)

Open a new private SQLiteDatabase associated with this Context's application package. Create the database file if it doesn't exist.

Parameters:: name - The name (unique in the application package) of the database.; mode - Operating mode. Use 0 or MODE_PRIVATE for the default operation, MODE_WORLD_READABLE and MODE_WORLD_WRITEABLE to control permissions.; factory - An optional factory class that is called to instantiate a cursor when query is called.
Returns:: The contents of a newly created database with the given name.
Throws:: SQLiteException - if the database file could not be opened.
See Also:: MODE_PRIVATE, MODE_WORLD_READABLE, MODE_WORLD_WRITEABLE, deleteDatabase(java.lang.String)

deleteDatabase

public abstract boolean deleteDatabase(String name)

Delete an existing private SQLiteDatabase associated with this Context's application package.

Parameters:: name - The name (unique in the application package) of the database.
Returns:: True if the database was successfully deleted; else false.
See Also:: openOrCreateDatabase(java.lang.String, int, android.database.sqlite.SQLiteDatabase.CursorFactory)

getDatabasePath

public abstract File getDatabasePath(String name)

Returns the absolute path on the filesystem where a database created with openOrCreateDatabase(java.lang.String, int, android.database.sqlite.SQLiteDatabase.CursorFactory) is stored.

Parameters:: name - The name of the database for which you would like to get its path.
Returns:: Returns an absolute path to the given database.
See Also:: openOrCreateDatabase(java.lang.String, int, android.database.sqlite.SQLiteDatabase.CursorFactory)

databaseList

public abstract String[] databaseList()

Returns an array of strings naming the private databases associated with this Context's application package.

Returns:: Array of strings naming the private databases.
See Also:: openOrCreateDatabase(java.lang.String, int, android.database.sqlite.SQLiteDatabase.CursorFactory), deleteDatabase(java.lang.String)

getWallpaper

public abstract Drawable getWallpaper()

Like peekWallpaper(), but always returns a valid Drawable. If no wallpaper is set, the system default wallpaper is returned.

Returns:: Returns a Drawable object that will draw the wallpaper.

peekWallpaper

public abstract Drawable peekWallpaper()

Retrieve the current system wallpaper. This is returned as an abstract Drawable that you can install in a View to display whatever wallpaper the user has currently set. If there is no wallpaper set, a null pointer is returned.

Returns:: Returns a Drawable object that will draw the wallpaper or a null pointer if these is none.

getWallpaperDesiredMinimumWidth

public abstract int getWallpaperDesiredMinimumWidth()

Returns the desired minimum width for the wallpaper. Callers of setWallpaper(android.graphics.Bitmap) or setWallpaper(java.io.InputStream) should check this value beforehand to make sure the supplied wallpaper respects the desired minimum width. If the returned value is <= 0, the caller should use the width of the default display instead.

Returns:: The desired minimum width for the wallpaper. This value should be honored by applications that set the wallpaper but it is not mandatory.

getWallpaperDesiredMinimumHeight

public abstract int getWallpaperDesiredMinimumHeight()

Returns the desired minimum height for the wallpaper. Callers of setWallpaper(android.graphics.Bitmap) or setWallpaper(java.io.InputStream) should check this value beforehand to make sure the supplied wallpaper respects the desired minimum height. If the returned value is <= 0, the caller should use the height of the default display instead.

Returns:: The desired minimum height for the wallpaper. This value should be honored by applications that set the wallpaper but it is not mandatory.

setWallpaper

public abstract void setWallpaper(Bitmap bitmap)
                           throws IOException

Change the current system wallpaper to a bitmap. The given bitmap is converted to a PNG and stored as the wallpaper. On success, the intent Intent.ACTION_WALLPAPER_CHANGED is broadcast.

Parameters:: bitmap - The bitmap to save.
Throws:: IOException - If an error occurs reverting to the default wallpaper.

setWallpaper

public abstract void setWallpaper(InputStream data)
                           throws IOException

Change the current system wallpaper to a specific byte stream. The give InputStream is copied into persistent storage and will now be used as the wallpaper. Currently it must be either a JPEG or PNG image. On success, the intent Intent.ACTION_WALLPAPER_CHANGED is broadcast.

Parameters:: data - A stream containing the raw data to install as a wallpaper.
Throws:: IOException - If an error occurs reverting to the default wallpaper.

clearWallpaper

public abstract void clearWallpaper()
                             throws IOException

Remove any currently set wallpaper, reverting to the system's default wallpaper. On success, the intent Intent.ACTION_WALLPAPER_CHANGED is broadcast.

Throws:: IOException - If an error occurs reverting to the default wallpaper.

startActivity

public abstract void startActivity(Intent intent)

Launch a new activity. You will not receive any information about when the activity exits.

Note that if this method is being called from outside of an Activity Context, then the Intent must include the Intent.FLAG_ACTIVITY_NEW_TASK launch flag. This is because, without being started from an existing Activity, there is no existing task in which to place the new activity and thus it needs to be placed in its own separate task.

This method throws ActivityNotFoundException if there was no Activity found to run the given Intent.

Parameters:: intent - The description of the activity to start.
Throws:: ActivityNotFoundException
See Also:: PackageManager.resolveActivity(android.content.Intent, int)

sendBroadcast

public abstract void sendBroadcast(Intent intent)

Broadcast the given intent to all interested BroadcastReceivers. This call is asynchronous; it returns immediately, and you will continue executing while the receivers are run. No results are propagated from receivers and receivers can not abort the broadcast. If you want to allow receivers to propagate results or abort the broadcast, you must send an ordered broadcast using sendOrderedBroadcast(Intent, String).

See BroadcastReceiver for more information on Intent broadcasts.

Parameters:: intent - The Intent to broadcast; all receivers matching this Intent will receive the broadcast.
See Also:: BroadcastReceiver, registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter), sendBroadcast(Intent, String), sendOrderedBroadcast(Intent, String), sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)

sendBroadcast

public abstract void sendBroadcast(Intent intent,
                                   String receiverPermission)

Broadcast the given intent to all interested BroadcastReceivers, allowing an optional required permission to be enforced. This call is asynchronous; it returns immediately, and you will continue executing while the receivers are run. No results are propagated from receivers and receivers can not abort the broadcast. If you want to allow receivers to propagate results or abort the broadcast, you must send an ordered broadcast using sendOrderedBroadcast(Intent, String).

See BroadcastReceiver for more information on Intent broadcasts.

Parameters:: intent - The Intent to broadcast; all receivers matching this Intent will receive the broadcast.; receiverPermission - (optional) String naming a permissions that a receiver must hold in order to receive your broadcast. If null, no permission is required.
See Also:: BroadcastReceiver, registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter), sendBroadcast(Intent), sendOrderedBroadcast(Intent, String), sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)

sendOrderedBroadcast

public 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. This call is asynchronous; it returns immediately, and you will continue executing while the receivers are run.

See BroadcastReceiver for more information on Intent broadcasts.

Parameters:: intent - The Intent to broadcast; all receivers matching this Intent will receive the broadcast.; receiverPermission - (optional) String naming a permissions that a receiver must hold in order to receive your broadcast. If null, no permission is required.
See Also:: BroadcastReceiver, registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter), sendBroadcast(Intent), sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String, Bundle)

sendOrderedBroadcast

public 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. This is accomplished by supplying your own BroadcastReceiver when calling, which will be treated as a final receiver at the end of the broadcast -- its BroadcastReceiver.onReceive(android.content.Context, android.content.Intent) method will be called with the result values collected from the other receivers. If you use an resultReceiver with this method, then the broadcast will be serialized in the same way as calling sendOrderedBroadcast(Intent, String).

Like sendBroadcast(Intent), this method is asynchronous; it will return before resultReceiver.onReceive() is called.

See BroadcastReceiver for more information on Intent broadcasts.

Parameters:: intent - The Intent to broadcast; all receivers matching this Intent will receive the broadcast.; receiverPermission - String naming a permissions that a receiver must hold in order to receive your broadcast. If null, no permission is required.; resultReceiver - Your own BroadcastReceiver to treat as the final receiver of the broadcast.; scheduler - A custom Handler with which to schedule the resultReceiver callback; if null it will be scheduled in the Context's main thread.; initialCode - An initial value for the result code. Often Activity.RESULT_OK.; initialData - An initial value for the result data. Often null.; initialExtras - An initial value for the result extras. Often null.
See Also:: sendBroadcast(Intent), sendBroadcast(Intent, String), sendOrderedBroadcast(Intent, String), sendStickyBroadcast(Intent), BroadcastReceiver, registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter), Activity.RESULT_OK

sendStickyBroadcast

public 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). In all other ways, this behaves the same as sendBroadcast(Intent).

You must hold the Manifest.permission.BROADCAST_STICKY permission in order to use this API. If you do not hold that permission, SecurityException will be thrown.

Parameters:: intent - The Intent to broadcast; all receivers matching this Intent will receive the broadcast, and the Intent will be held to be re-broadcast to future receivers.
See Also:: sendBroadcast(Intent)

removeStickyBroadcast

public abstract void removeStickyBroadcast(Intent intent)

Remove the data previously sent with sendStickyBroadcast(android.content.Intent), so that it is as if the sticky broadcast had never happened.

You must hold the Manifest.permission.BROADCAST_STICKY permission in order to use this API. If you do not hold that permission, SecurityException will be thrown.

Parameters:: intent - The Intent that was previously broadcast.
See Also:: sendStickyBroadcast(android.content.Intent)

registerReceiver

public abstract Intent registerReceiver(BroadcastReceiver receiver,
                                        IntentFilter filter)

Register an BroadcastReceiver to be run in the main activity thread. The receiver will be called with any broadcast Intent that matches filter, in the main application thread.

The system may broadcast Intents that are "sticky" -- these stay around after the broadcast as finished, to be sent to any later registrations. If your IntentFilter matches one of these sticky Intents, that Intent will be returned by this function and sent to your receiver as if it had just been broadcast.

There may be multiple sticky Intents that match filter, in which case each of these will be sent to receiver. In this case, only one of these can be returned directly by the function; which of these that is returned is arbitrarily decided by the system.

If you know the Intent your are registering for is sticky, you can supply null for your receiver. In this case, no receiver is registered -- the function simply returns the sticky Intent that matches filter. In the case of multiple matches, the same rules as described above apply.

See BroadcastReceiver for more information on Intent broadcasts.

Note: this method can not be called from an BroadcastReceiver component. It is okay, however, to use this method from another BroadcastReceiver that has itself been registered with registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter), since the lifetime of such an BroadcastReceiver is tied to another object (the one that registered it).

Parameters:: receiver - The BroadcastReceiver to handle the broadcast.; filter - Selects the Intent broadcasts to be received.
Returns:: The first sticky intent found that matches filter, or null if there are none.
See Also:: registerReceiver(BroadcastReceiver, IntentFilter, String, Handler), sendBroadcast(android.content.Intent), unregisterReceiver(android.content.BroadcastReceiver)

registerReceiver

public abstract Intent registerReceiver(BroadcastReceiver receiver,
                                        IntentFilter filter,
                                        String broadcastPermission,
                                        Handler scheduler)

Register to receive intent broadcasts, to run in the context of scheduler. See registerReceiver(BroadcastReceiver, IntentFilter) for more information. This allows you to enforce permissions on who can broadcast intents to your receiver, or have the receiver run in a different thread than the main application thread.

See BroadcastReceiver for more information on Intent broadcasts.

Parameters:: receiver - The BroadcastReceiver to handle the broadcast.; filter - Selects the Intent broadcasts to be received.; broadcastPermission - String naming a permissions that a broadcaster must hold in order to send an Intent to you. If null, no permission is required.; scheduler - Handler identifying the thread that will receive the Intent. If null, the main thread of the process will be used.
Returns:: The first sticky intent found that matches filter, or null if there are none.
See Also:: registerReceiver(BroadcastReceiver, IntentFilter), sendBroadcast(android.content.Intent), unregisterReceiver(android.content.BroadcastReceiver)

unregisterReceiver

public abstract void unregisterReceiver(BroadcastReceiver receiver)

Unregister a previously registered BroadcastReceiver. All filters that have been registered for this BroadcastReceiver will be removed.

Parameters:: receiver - The BroadcastReceiver to unregister.
See Also:: registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter)

startService

public abstract ComponentName startService(Intent service)

Request that a given application service be started. The Intent can either contain the complete class name of a specific service implementation to start, or an abstract definition through the action and other fields of the kind of service to start. If this service is not already running, it will be instantiated and started (creating a process for it if needed); if it is running then it remains running.

Every call to this method will result in a corresponding call to the target service's Service.onStart(android.content.Intent, int) method, with the intent given here. This provides a convenient way to submit jobs to a service without having to bind and call on to its interface.

Using startService() overrides the default service lifetime that is managed by bindService(android.content.Intent, android.content.ServiceConnection, int): it requires the service to remain running until stopService(android.content.Intent) is called, regardless of whether any clients are connected to it. Note that calls to startService() are not nesting: no matter how many times you call startService(), a single call to stopService(android.content.Intent) will stop it.

The system attempts to keep running services around as much as possible. The only time they should be stopped is if the current foreground application is using so many resources that the service needs to be killed. If any errors happen in the service's process, it will automatically be restarted.

This function will throw SecurityException if you do not have permission to start the given service.

Parameters:: service - Identifies the service to be started. The Intent may specify either an explicit component name to start, or a logical description (action, category, etc) to match an IntentFilter published by a service. Additional values may be included in the Intent extras to supply arguments along with this specific start call.
Returns:: If the service is being started or is already running, the ComponentName of the actual service that was started is returned; else if the service does not exist null is returned.
Throws:: SecurityException
See Also:: stopService(android.content.Intent), bindService(android.content.Intent, android.content.ServiceConnection, int)

stopService

public abstract boolean stopService(Intent service)

Request that a given application service be stopped. If the service is not running, nothing happens. Otherwise it is stopped. Note that calls to startService() are not counted -- this stops the service no matter how many times it was started.

Note that if a stopped service still has ServiceConnection objects bound to it with the BIND_AUTO_CREATE set, it will not be destroyed until all of these bindings are removed. See the Service documentation for more details on a service's lifecycle.

This function will throw SecurityException if you do not have permission to stop the given service.

Parameters:: service - Description of the service to be stopped. The Intent may specify either an explicit component name to start, or a logical description (action, category, etc) to match an IntentFilter published by a service.
Returns:: If there is a service matching the given Intent that is already running, then it is stopped and true is returned; else false is returned.
Throws:: SecurityException
See Also:: startService(android.content.Intent)

bindService

public abstract boolean bindService(Intent service,
                                    ServiceConnection conn,
                                    int flags)

Connect to an application service, creating it if needed. This defines a dependency between your application and the service. The given conn will receive the service object when its created and be told if it dies and restarts. The service will be considered required by the system only for as long as the calling context exists. For example, if this Context is an Activity that is stopped, the service will not be required to continue running until the Activity is resumed.

This function will throw SecurityException if you do not have permission to bind to the given service.

Note: this method can not be called from an BroadcastReceiver component. A pattern you can use to communicate from an BroadcastReceiver to a Service is to call startService(android.content.Intent) with the arguments containing the command to be sent, with the service calling its Service.stopSelf(int) method when done executing that command. See the API demo App/Service/Service Start Arguments Controller for an illustration of this. It is okay, however, to use this method from an BroadcastReceiver that has been registered with registerReceiver(android.content.BroadcastReceiver, android.content.IntentFilter), since the lifetime of this BroadcastReceiver is tied to another object (the one that registered it).

Parameters:: service - Identifies the service to connect to. The Intent may specify either an explicit component name, or a logical description (action, category, etc) to match an IntentFilter published by a service.; conn - Receives information as the service is started and stopped.; flags - Operation options for the binding. May be 0 or BIND_AUTO_CREATE.
Returns:: If you have successfully bound to the service, true is returned; false is returned if the connection is not made so you will not receive the service object.
Throws:: SecurityException
See Also:: unbindService(android.content.ServiceConnection), startService(android.content.Intent), BIND_AUTO_CREATE

unbindService

public abstract void unbindService(ServiceConnection conn)

Disconnect from an application service. You will no longer receive calls as the service is restarted, and the service is now allowed to stop at any time.

Parameters:: conn - The connection interface previously supplied to bindService().
See Also:: bindService(android.content.Intent, android.content.ServiceConnection, int)

startInstrumentation

public abstract boolean startInstrumentation(ComponentName className,
                                             String profileFile,
                                             Bundle arguments)

Start executing an Instrumentation class. The given Instrumentation component will be run by killing its target application (if currently running), starting the target process, instantiating the instrumentation component, and then letting it drive the application.

This function is not synchronous -- it returns as soon as the instrumentation has started and while it is running.

Instrumentation is normally only allowed to run against a package that is either unsigned or signed with a signature that the the instrumentation package is also signed with (ensuring the target trusts the instrumentation).

Parameters:: className - Name of the Instrumentation component to be run.; profileFile - Optional path to write profiling data as the instrumentation runs, or null for no profiling.; arguments - Additional optional arguments to pass to the instrumentation, or null.
Returns:: Returns true if the instrumentation was successfully started, else false if it could not be found.

getSystemService

public abstract Object getSystemService(String name)

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.

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.
See Also:: WINDOW_SERVICE, WindowManager, LAYOUT_INFLATER_SERVICE, LayoutInflater, ACTIVITY_SERVICE, ActivityManager, POWER_SERVICE, PowerManager, ALARM_SERVICE, AlarmManager, NOTIFICATION_SERVICE, NotificationManager, KEYGUARD_SERVICE, KeyguardManager, LOCATION_SERVICE, LocationManager, SEARCH_SERVICE, SearchManager, SENSOR_SERVICE, SensorManager, VIBRATOR_SERVICE, Vibrator, CONNECTIVITY_SERVICE, ConnectivityManager, WIFI_SERVICE, WifiManager, AUDIO_SERVICE, AudioManager, TELEPHONY_SERVICE, android.internal.TelephonyManager

checkPermission

public 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.

Parameters:: permission - The name of the permission being checked.; pid - The process ID being checked against. Must be > 0.; uid - The user ID being checked against. A uid of 0 is the root user, which will pass every permission check.
Returns:: Returns PackageManager.PERMISSION_GRANTED if the given pid/uid is allowed that permission, or PackageManager.PERMISSION_DENIED if it is not.
See Also:: PackageManager.checkPermission(String, String), checkCallingPermission(java.lang.String)

checkCallingPermission

public abstract int checkCallingPermission(String permission)

Determine whether the calling process of an IPC you are handling has been granted a particular permission. This is basically the same as calling checkPermission(String, int, int) with the pid and uid returned by Binder.getCallingPid() and Binder.getCallingUid(). One important difference is that if you are not currently processing an IPC, this function will always fail. This is done to protect against accidentally leaking permissions; you can use checkCallingOrSelfPermission(java.lang.String) to avoid this protection.

Parameters:: permission - The name of the permission being checked.
Returns:: Returns PackageManager.PERMISSION_GRANTED if the calling pid/uid is allowed that permission, or PackageManager.PERMISSION_DENIED if it is not.
See Also:: PackageManager.checkPermission(String, String), checkPermission(java.lang.String, int, int), checkCallingOrSelfPermission(java.lang.String)

checkCallingOrSelfPermission

public abstract int checkCallingOrSelfPermission(String permission)

Determine whether the calling process of an IPC or you have been granted a particular permission. This is the same as checkCallingPermission(java.lang.String), except it grants your own permissions if you are not currently processing an IPC. Use with care!

Parameters:: permission - The name of the permission being checked.
Returns:: Returns PackageManager.PERMISSION_GRANTED if the calling pid/uid is allowed that permission, or PackageManager.PERMISSION_DENIED if it is not.
See Also:: PackageManager.checkPermission(String, String), checkPermission(java.lang.String, int, int), checkCallingPermission(java.lang.String)

enforcePermission

public 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.

Parameters:: permission - The name of the permission being checked.; pid - The process ID being checked against. Must be > 0.; uid - The user ID being checked against. A uid of 0 is the root user, which will pass every permission check.; message - A message to include in the exception if it is thrown.
See Also:: checkPermission(String, int, int)

enforceCallingPermission

public 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. This is basically the same as calling enforcePermission(String, int, int, String) with the pid and uid returned by Binder.getCallingPid() and Binder.getCallingUid(). One important difference is that if you are not currently processing an IPC, this function will always throw the SecurityException. This is done to protect against accidentally leaking permissions; you can use enforceCallingOrSelfPermission(java.lang.String, java.lang.String) to avoid this protection.

Parameters:: permission - The name of the permission being checked.; message - A message to include in the exception if it is thrown.
See Also:: checkCallingPermission(String)

enforceCallingOrSelfPermission

public 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. This is the same as enforceCallingPermission(java.lang.String, java.lang.String), except it grants your own permissions if you are not currently processing an IPC. Use with care!

Parameters:: permission - The name of the permission being checked.; message - A message to include in the exception if it is thrown.
See Also:: checkCallingOrSelfPermission(String)

grantUriPermission

public 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. This can be used to grant specific, temporary permissions, typically in response to user interaction (such as the user opening an attachment that you would like someone else to display).

Normally you should use Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION with the Intent being used to start an activity instead of this function directly. If you use this function directly, you should be sure to call revokeUriPermission(android.net.Uri, int) when the target should no longer be allowed to access it.

To succeed, the content provider owning the Uri must have set the grantUriPermissions attribute in its manifest or included the <grant-uri-permissions> tag.

Parameters:: toPackage - The package you would like to allow to access the Uri.; uri - The Uri you would like to grant access to.; modeFlags - The desired access modes. Any combination of Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION.
See Also:: revokeUriPermission(android.net.Uri, int)

revokeUriPermission

public abstract void revokeUriPermission(Uri uri,
                                         int modeFlags)

Remove all permissions to access a particular content provider Uri that were previously added with grantUriPermission(java.lang.String, android.net.Uri, int). The given Uri will match all previously granted Uris that are the same or a sub-path of the given Uri. That is, revoking "content://foo/one" will revoke both "content://foo/target" and "content://foo/target/sub", but not "content://foo".

Parameters:: uri - The Uri you would like to revoke access to.; modeFlags - The desired access modes. Any combination of Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION.
See Also:: grantUriPermission(java.lang.String, android.net.Uri, int)

checkUriPermission

public 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. This only checks for permissions that have been explicitly granted -- if the given process/uid has more general access to the URI's content provider then this check will always fail.

Parameters:: uri - The uri that is being checked.; pid - The process ID being checked against. Must be > 0.; uid - The user ID being checked against. A uid of 0 is the root user, which will pass every permission check.; modeFlags - The type of access to grant. May be one or both of Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION.
Returns:: Returns PackageManager.PERMISSION_GRANTED if the given pid/uid is allowed to access that uri, or PackageManager.PERMISSION_DENIED if it is not.
See Also:: checkCallingUriPermission(android.net.Uri, int)

checkCallingUriPermission

public abstract int checkCallingUriPermission(Uri uri,
                                              int modeFlags)

Determine whether the calling process and user ID has been granted permission to access a specific URI. This is basically the same as calling

checkUriPermission(Uri, int, int,
 int)

with the pid and uid returned by Binder.getCallingPid() and Binder.getCallingUid(). One important difference is that if you are not currently processing an IPC, this function will always fail.

Parameters:: uri - The uri that is being checked.; modeFlags - The type of access to grant. May be one or both of Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION.
Returns:: Returns PackageManager.PERMISSION_GRANTED if the caller is allowed to access that uri, or PackageManager.PERMISSION_DENIED if it is not.
See Also:: checkUriPermission(Uri, int, int, int)

checkCallingOrSelfUriPermission

public 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. This is the same as checkCallingUriPermission(android.net.Uri, int), except it grants your own permissions if you are not currently processing an IPC. Use with care!

Parameters:: uri - The uri that is being checked.; modeFlags - The type of access to grant. May be one or both of Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION.
Returns:: Returns PackageManager.PERMISSION_GRANTED if the caller is allowed to access that uri, or PackageManager.PERMISSION_DENIED if it is not.
See Also:: checkCallingUriPermission(android.net.Uri, int)

checkUriPermission

public abstract int checkUriPermission(Uri uri,
                                       String readPermission,
                                       String writePermission,
                                       int pid,
                                       int uid,
                                       int modeFlags)

Check both a Uri and normal permission. This allows you to perform both checkPermission(java.lang.String, int, int) and checkUriPermission(android.net.Uri, int, int, int) in one call.

Parameters:: uri - The Uri whose permission is to be checked, or null to not do this check.; readPermission - The permission that provides overall read access, or null to not do this check.; writePermission - The permission that provides overall write acess, or null to not do this check.; pid - The process ID being checked against. Must be > 0.; uid - The user ID being checked against. A uid of 0 is the root user, which will pass every permission check.; modeFlags - The type of access to grant. May be one or both of Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION.
Returns:: Returns PackageManager.PERMISSION_GRANTED if the caller is allowed to access that uri or holds one of the given permissions, or PackageManager.PERMISSION_DENIED if it is not.

enforceUriPermission

public 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. This only checks for permissions that have been explicitly granted -- if the given process/uid has more general access to the URI's content provider then this check will always fail.

Parameters:: uri - The uri that is being checked.; pid - The process ID being checked against. Must be > 0.; uid - The user ID being checked against. A uid of 0 is the root user, which will pass every permission check.; modeFlags - The type of access to grant. May be one or both of Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION.; message - A message to include in the exception if it is thrown.
See Also:: checkUriPermission(Uri, int, int, int)

enforceCallingUriPermission

public 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. This is basically the same as calling enforceUriPermission(Uri, int, int, int, String) with the pid and uid returned by Binder.getCallingPid() and Binder.getCallingUid(). One important difference is that if you are not currently processing an IPC, this function will always throw a SecurityException.

Parameters:: uri - The uri that is being checked.; modeFlags - The type of access to grant. May be one or both of Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION.; message - A message to include in the exception if it is thrown.
See Also:: checkCallingUriPermission(Uri, int)

enforceCallingOrSelfUriPermission

public 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. This is the same as enforceCallingUriPermission(android.net.Uri, int, java.lang.String), except it grants your own permissions if you are not currently processing an IPC. Use with care!

Parameters:: uri - The uri that is being checked.; modeFlags - The type of access to grant. May be one or both of Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION.; message - A message to include in the exception if it is thrown.
See Also:: checkCallingOrSelfUriPermission(Uri, int)

enforceUriPermission

public abstract void enforceUriPermission(Uri uri,
                                          String readPermission,
                                          String writePermission,
                                          int pid,
                                          int uid,
                                          int modeFlags,
                                          String message)

Enforce both a Uri and normal permission. This allows you to perform both enforcePermission(java.lang.String, int, int, java.lang.String) and enforceUriPermission(android.net.Uri, int, int, int, java.lang.String) in one call.

Parameters:: uri - The Uri whose permission is to be checked, or null to not do this check.; readPermission - The permission that provides overall read access, or null to not do this check.; writePermission - The permission that provides overall write acess, or null to not do this check.; pid - The process ID being checked against. Must be > 0.; uid - The user ID being checked against. A uid of 0 is the root user, which will pass every permission check.; modeFlags - The type of access to grant. May be one or both of Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION.; message - A message to include in the exception if it is thrown.
See Also:: checkUriPermission(Uri, String, String, int, int, int)

createPackageContext

public abstract Context createPackageContext(String packageName,
                                             int flags)
                                      throws PackageManager.NameNotFoundException

Return a new Context object for the given application name. This Context is the same as what the named application gets when it is launched, containing the same resources and class loader. Each call to this method returns a new instance of a Context object; Context objects are not shared, however they share common state (Resources, ClassLoader, etc) so the Context instance itself is fairly lightweight.

Throws PackageManager.NameNotFoundException if there is no application with the given package name.

Throws SecurityException if the Context requested can not be loaded into the caller's process for security reasons (see CONTEXT_INCLUDE_CODE for more information}.

Parameters:: packageName - Name of the application's package.; flags - Option flags, one of CONTEXT_INCLUDE_CODE or CONTEXT_IGNORE_SECURITY.
Returns:: A Context for the application.
Throws:: SecurityException; PackageManager.NameNotFoundException - if there is no application with the given package name

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android.content Class Context

MODE_PRIVATE

MODE_WORLD_READABLE

MODE_WORLD_WRITEABLE

MODE_APPEND

BIND_AUTO_CREATE

BIND_DEBUG_UNBIND

POWER_SERVICE

WINDOW_SERVICE

LAYOUT_INFLATER_SERVICE

ACTIVITY_SERVICE

ALARM_SERVICE

NOTIFICATION_SERVICE

KEYGUARD_SERVICE

LOCATION_SERVICE

SEARCH_SERVICE

SENSOR_SERVICE

BLUETOOTH_SERVICE

WALLPAPER_SERVICE

VIBRATOR_SERVICE

STATUS_BAR_SERVICE

CONNECTIVITY_SERVICE

WIFI_SERVICE

AUDIO_SERVICE

TELEPHONY_SERVICE

CLIPBOARD_SERVICE

CONTEXT_INCLUDE_CODE

CONTEXT_IGNORE_SECURITY

Context

getAssets

getResources

getPackageManager

getContentResolver

getMainLooper

getApplicationContext

getText

getString

getString

setTheme

getTheme

obtainStyledAttributes

obtainStyledAttributes

obtainStyledAttributes

obtainStyledAttributes

getClassLoader

getPackageName

getPackageResourcePath

getPackageCodePath

getSharedPreferences

openFileInput

openFileOutput

deleteFile

getFileStreamPath

getFilesDir

getCacheDir

fileList

getDir

openOrCreateDatabase

deleteDatabase

getDatabasePath

databaseList

getWallpaper

peekWallpaper

getWallpaperDesiredMinimumWidth

getWallpaperDesiredMinimumHeight

setWallpaper

setWallpaper

clearWallpaper

startActivity

sendBroadcast

sendBroadcast

sendOrderedBroadcast

sendOrderedBroadcast

sendStickyBroadcast

removeStickyBroadcast

registerReceiver

registerReceiver

unregisterReceiver

startService

stopService

android.content
Class Context