ContextWrapper
open class ContextWrapper : Context
kotlin.Any | ||
↳ | android.content.Context | |
↳ | android.content.ContextWrapper |
Proxying implementation of Context that simply delegates all of its calls to another Context. Can be subclassed to modify behavior without changing the original Context.
Summary
Inherited constants | |
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Public constructors | |
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ContextWrapper(base: Context!) |
Public methods | |
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open Boolean |
bindIsolatedService(service: Intent, flags: Int, instanceName: String, executor: Executor, conn: ServiceConnection) |
open Boolean |
bindService(service: Intent, conn: ServiceConnection, flags: Int) |
open Boolean |
bindService(service: Intent, conn: ServiceConnection, flags: Context.BindServiceFlags) See |
open Boolean |
bindService(service: Intent, flags: Int, executor: Executor, conn: ServiceConnection) |
open Boolean |
bindService(service: Intent, flags: Context.BindServiceFlags, executor: Executor, conn: ServiceConnection) See |
open Int |
checkCallingOrSelfPermission(permission: String) |
open Int |
checkCallingOrSelfUriPermission(uri: Uri!, modeFlags: Int) |
open IntArray |
checkCallingOrSelfUriPermissions(uris: MutableList<Uri!>, modeFlags: Int) Determine whether the calling process of an IPC or you has been granted permission to access a list of URIs. |
open Int |
checkCallingPermission(permission: String) |
open Int |
checkCallingUriPermission(uri: Uri!, modeFlags: Int) |
open IntArray |
checkCallingUriPermissions(uris: MutableList<Uri!>, modeFlags: Int) Determine whether the calling process and uid has been granted permission to access a list of URIs. |
open Int |
checkContentUriPermissionFull(uri: Uri, pid: Int, uid: Int, modeFlags: Int) Determine whether a particular process and uid has been granted permission to access a specific content URI. |
open Int |
checkPermission(permission: String, pid: Int, uid: Int) |
open Int |
checkSelfPermission(permission: String) |
open Int |
checkUriPermission(uri: Uri!, pid: Int, uid: Int, modeFlags: Int) |
open Int |
checkUriPermission(uri: Uri?, readPermission: String?, writePermission: String?, pid: Int, uid: Int, modeFlags: Int) Check both a Uri and normal permission. |
open IntArray |
checkUriPermissions(uris: MutableList<Uri!>, pid: Int, uid: Int, modeFlags: Int) Determine whether a particular process and uid has been granted permission to access a list of URIs. |
open Unit | |
open Context |
createAttributionContext(attributionTag: String?) Return a new Context object for the current Context but attribute to a different tag. |
open Context! |
createConfigurationContext(overrideConfiguration: Configuration) |
open Context |
createContext(contextParams: ContextParams) Creates a context with specific properties and behaviors. |
open Context |
createDeviceContext(deviceId: Int) Returns a new |
open Context! | |
open Context! |
createDisplayContext(display: Display) |
open Context! |
createPackageContext(packageName: String!, flags: Int) |
open Context |
createWindowContext(type: Int, options: Bundle?) Creates a Context for a non-activity window. |
open Context |
createWindowContext(display: Display, type: Int, options: Bundle?) Creates a |
open Array<String!>! | |
open Boolean |
deleteDatabase(name: String!) |
open Boolean |
deleteFile(name: String!) |
open Boolean | |
open Unit |
enforceCallingOrSelfPermission(permission: String, message: String?) If neither you nor the calling process of an IPC you are handling has been granted a particular permission, throw a |
open Unit |
enforceCallingOrSelfUriPermission(uri: Uri!, modeFlags: Int, message: String!) |
open Unit |
enforceCallingPermission(permission: String, message: String?) If the calling process of an IPC you are handling has not been granted a particular permission, throw a |
open Unit |
enforceCallingUriPermission(uri: Uri!, modeFlags: Int, message: String!) |
open Unit |
enforcePermission(permission: String, pid: Int, uid: Int, message: String?) If the given permission is not allowed for a particular process and user ID running in the system, throw a |
open Unit | |
open Unit |
enforceUriPermission(uri: Uri?, readPermission: String?, writePermission: String?, pid: Int, uid: Int, modeFlags: Int, message: String?) Enforce both a Uri and normal permission. |
open Array<String!>! |
fileList() |
open Context! | |
open ApplicationInfo! | |
open AssetManager! | |
open AttributionSource | |
open Context! | |
open File! | |
open ClassLoader! | |
open File! | |
open ContentResolver! | |
open File! | |
open File! |
getDatabasePath(name: String!) |
open Int | |
open File! | |
open Display! |
Get the display this context is associated with. |
open File? |
Returns absolute path to application-specific directory on the primary shared/external storage device where the application can place cache files it owns. |
open Array<File!>! | |
open File? |
getExternalFilesDir(type: String?) Returns the absolute path to the directory on the primary shared/external storage device where the application can place persistent files it owns. |
open Array<File!>! |
getExternalFilesDirs(type: String!) |
open Array<File!>! | |
open File! |
getFileStreamPath(name: String!) |
open File! | |
open Executor! | |
open Looper! | |
open File! | |
open File! | |
open Array<File!>! | |
open String! | |
open PackageManager! | |
open String! | |
open String! | |
open ContextParams? |
Return the set of parameters which this Context was created with, if it was created via |
open Resources! | |
open SharedPreferences! |
getSharedPreferences(: String!, : Int) |
open Any! |
getSystemService(name: String) |
open String? |
getSystemServiceName(serviceClass: Class<*>) |
open Resources.Theme! |
getTheme() |
open Drawable! | |
open Int | |
open Int | |
open Unit |
grantUriPermission(toPackage: String!, uri: Uri!, modeFlags: Int) |
open Boolean | |
open Boolean | |
open Boolean |
moveDatabaseFrom(sourceContext: Context!, name: String!) |
open Boolean |
moveSharedPreferencesFrom(: Context!, : String!) |
open FileInputStream! |
openFileInput(name: String!) |
open FileOutputStream! |
openFileOutput(name: String!, mode: Int) |
open SQLiteDatabase! |
openOrCreateDatabase(name: String!, mode: Int, factory: SQLiteDatabase.CursorFactory!) |
open SQLiteDatabase! |
openOrCreateDatabase(name: String!, mode: Int, factory: SQLiteDatabase.CursorFactory!, errorHandler: DatabaseErrorHandler?) Open a new private SQLiteDatabase associated with this Context's application package. |
open Drawable! | |
open Unit |
registerComponentCallbacks(callback: ComponentCallbacks!) Add a new |
open Unit |
registerDeviceIdChangeListener(executor: Executor, listener: IntConsumer) Adds a new device ID changed listener to the |
open Intent? |
registerReceiver(receiver: BroadcastReceiver?, filter: IntentFilter!) Register a BroadcastReceiver to be run in the main activity thread. |
open Intent? |
registerReceiver(receiver: BroadcastReceiver?, filter: IntentFilter!, flags: Int) Register to receive intent broadcasts, with the receiver optionally being exposed to Instant Apps. |
open Intent? |
registerReceiver(receiver: BroadcastReceiver?, filter: IntentFilter!, broadcastPermission: String?, scheduler: Handler?) Register to receive intent broadcasts, to run in the context of scheduler. |
open Intent? |
registerReceiver(receiver: BroadcastReceiver?, filter: IntentFilter!, broadcastPermission: String?, scheduler: Handler?, flags: Int) Register to receive intent broadcasts, to run in the context of scheduler. |
open Unit |
removeStickyBroadcast(intent: Intent!) |
open Unit |
removeStickyBroadcastAsUser(intent: Intent!, user: UserHandle!) |
open Unit |
revokeSelfPermissionsOnKill(permissions: MutableCollection<String!>) Triggers the revocation of one or more permissions for the calling package. |
open Unit |
revokeUriPermission(uri: Uri!, modeFlags: Int) |
open Unit |
revokeUriPermission(targetPackage: String!, uri: Uri!, modeFlags: Int) |
open Unit |
sendBroadcast(intent: Intent!) |
open Unit |
sendBroadcast(intent: Intent!, receiverPermission: String?) Broadcast the given intent to all interested BroadcastReceivers, allowing an optional required permission to be enforced. |
open Unit |
sendBroadcast(intent: Intent, receiverPermission: String?, options: Bundle?) Broadcast the given intent to all interested BroadcastReceivers, allowing an optional required permission to be enforced. |
open Unit |
sendBroadcastAsUser(intent: Intent!, user: UserHandle!) |
open Unit |
sendBroadcastAsUser(intent: Intent!, user: UserHandle!, receiverPermission: String?) |
open Unit |
sendOrderedBroadcast(intent: Intent!, receiverPermission: String?) 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. |
open Unit |
sendOrderedBroadcast(intent: Intent, receiverPermission: String?, options: Bundle?) 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. |
open Unit |
sendOrderedBroadcast(intent: Intent, receiverPermission: String?, resultReceiver: BroadcastReceiver?, scheduler: Handler?, initialCode: Int, initialData: String?, initialExtras: Bundle?) Version of |
open Unit |
sendOrderedBroadcast(intent: Intent, receiverPermission: String?, options: Bundle?, resultReceiver: BroadcastReceiver?, scheduler: Handler?, initialCode: Int, initialData: String?, initialExtras: Bundle?) Version of |
open Unit |
sendOrderedBroadcast(intent: Intent, receiverPermission: String?, receiverAppOp: String?, resultReceiver: BroadcastReceiver?, scheduler: Handler?, initialCode: Int, initialData: String?, initialExtras: Bundle?) Version of |
open Unit |
sendOrderedBroadcast(intent: Intent, initialCode: Int, receiverPermission: String?, receiverAppOp: String?, resultReceiver: BroadcastReceiver?, scheduler: Handler?, initialData: String?, initialExtras: Bundle?, options: Bundle?) |
open Unit |
sendOrderedBroadcastAsUser(intent: Intent!, user: UserHandle!, receiverPermission: String?, resultReceiver: BroadcastReceiver?, scheduler: Handler?, initialCode: Int, initialData: String?, initialExtras: Bundle?) Version of |
open Unit |
sendStickyBroadcast(intent: Intent!) |
open Unit |
sendStickyBroadcast(intent: Intent, options: Bundle?) Perform a |
open Unit |
sendStickyBroadcastAsUser(intent: Intent!, user: UserHandle!) |
open Unit |
sendStickyOrderedBroadcast(intent: Intent!, resultReceiver: BroadcastReceiver?, scheduler: Handler?, initialCode: Int, initialData: String?, initialExtras: Bundle?) Version of #sendStickyBroadcast that allows you to receive data back from the broadcast. |
open Unit |
sendStickyOrderedBroadcastAsUser(intent: Intent!, user: UserHandle!, resultReceiver: BroadcastReceiver?, scheduler: Handler?, initialCode: Int, initialData: String?, initialExtras: Bundle?) Version of |
open Unit | |
open Unit |
setWallpaper(bitmap: Bitmap!) |
open Unit |
setWallpaper(data: InputStream!) |
open Unit |
startActivities(intents: Array<Intent!>!) |
open Unit |
startActivities(intents: Array<Intent!>!, options: Bundle?) Launch multiple new activities. |
open Unit |
startActivity(intent: Intent!) |
open Unit |
startActivity(intent: Intent!, options: Bundle?) Launch a new activity. |
open ComponentName? |
startForegroundService(service: Intent!) Similar to |
open Boolean |
startInstrumentation(className: ComponentName, profileFile: String?, arguments: Bundle?) Start executing an |
open Unit |
startIntentSender(intent: IntentSender!, fillInIntent: Intent?, flagsMask: Int, flagsValues: Int, extraFlags: Int) Same as |
open Unit |
startIntentSender(intent: IntentSender!, fillInIntent: Intent?, flagsMask: Int, flagsValues: Int, extraFlags: Int, options: Bundle?) Like |
open ComponentName? |
startService(service: Intent!) Request that a given application service be started. |
open Boolean |
stopService(name: Intent!) |
open Unit |
unbindService(conn: ServiceConnection) |
open Unit |
unregisterComponentCallbacks(callback: ComponentCallbacks!) Remove a |
open Unit |
unregisterDeviceIdChangeListener(listener: IntConsumer) Removes a device ID changed listener from the Context. |
open Unit |
unregisterReceiver(receiver: BroadcastReceiver!) |
open Unit |
updateServiceGroup(conn: ServiceConnection, group: Int, importance: Int) |
Protected methods | |
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open Unit |
attachBaseContext(base: Context!) Set the base context for this ContextWrapper. |
Inherited functions | |
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Public constructors
Public methods
bindIsolatedService
open fun bindIsolatedService(
service: Intent,
flags: Int,
instanceName: String,
executor: Executor,
conn: ServiceConnection
): Boolean
Parameters | |
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service |
Intent: Identifies the service to connect to. The Intent must specify an explicit component name. This value cannot be null . |
flags |
Int: Operation options for the binding as per #bindService. |
instanceName |
String: Unique identifier for the service instance. Each unique name here will result in a different service instance being created. Identifiers must only contain ASCII letters, digits, underscores, and periods. This value cannot be null . |
executor |
Executor: Callbacks on ServiceConnection will be called on executor. Must use same instance for the same instance of ServiceConnection. This value cannot be null . Callback and listener events are dispatched through this Executor , providing an easy way to control which thread is used. To dispatch events through the main thread of your application, you can use Context.getMainExecutor() . Otherwise, provide an Executor that dispatches to an appropriate thread. |
conn |
ServiceConnection: Receives information as the service is started and stopped. This must be a valid ServiceConnection object; it must not be null. |
Return | |
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Boolean |
Returns success of binding as per #bindService. |
Exceptions | |
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java.lang.SecurityException |
If the caller does not have permission to access the service |
java.lang.IllegalArgumentException |
If the instanceName is invalid. |
bindService
open fun bindService(
service: Intent,
conn: ServiceConnection,
flags: Int
): Boolean
Parameters | |
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service |
Intent: Identifies the service to connect to. The Intent must specify an explicit component name. This value cannot be null . |
conn |
ServiceConnection: Receives information as the service is started and stopped. This must be a valid ServiceConnection object; it must not be null. |
flags |
Int: Operation options for the binding. Can be: |
Return | |
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Boolean |
true if the system is in the process of bringing up a service that your client has permission to bind to; false if the system couldn't find the service or if your client doesn't have permission to bind to it. Regardless of the return value, you should later call unbindService to release the connection. |
Exceptions | |
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java.lang.SecurityException |
If the caller does not have permission to access the service or the service cannot be found. Call unbindService to release the connection when this exception is thrown. |
bindService
open fun bindService(
service: Intent,
conn: ServiceConnection,
flags: Context.BindServiceFlags
): Boolean
See bindService(android.content.Intent,android.content.ServiceConnection,int)
Call BindServiceFlags#of(long)
to obtain a BindServiceFlags object.
Parameters | |
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service |
Intent: This value cannot be null . |
conn |
ServiceConnection: This value cannot be null . |
flags |
Context.BindServiceFlags: This value cannot be null . |
bindService
open fun bindService(
service: Intent,
flags: Int,
executor: Executor,
conn: ServiceConnection
): Boolean
Return | |
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Boolean |
The result of the binding as described in bindService(Intent, ServiceConnection, int) . |
bindService
open fun bindService(
service: Intent,
flags: Context.BindServiceFlags,
executor: Executor,
conn: ServiceConnection
): Boolean
See bindService(android.content.Intent,int,java.util.concurrent.Executor,android.content.ServiceConnection)
Call BindServiceFlags#of(long)
to obtain a BindServiceFlags object.
Parameters | |
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service |
Intent: This value cannot be null . |
flags |
Context.BindServiceFlags: This value cannot be null . |
executor |
Executor: This value cannot be null . |
conn |
ServiceConnection: This value cannot be null . |
checkCallingOrSelfPermission
open fun checkCallingOrSelfPermission(permission: String): Int
Parameters | |
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permission |
String: The name of the permission being checked. This value cannot be null . |
Return | |
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Int |
PackageManager#PERMISSION_GRANTED if the calling pid/uid is allowed that permission, or PackageManager#PERMISSION_DENIED if it is not. Value is android.content.pm.PackageManager#PERMISSION_GRANTED , or android.content.pm.PackageManager#PERMISSION_DENIED |
checkCallingOrSelfUriPermission
open fun checkCallingOrSelfUriPermission(
uri: Uri!,
modeFlags: Int
): Int
Parameters | |
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uri |
Uri!: The uri that is being checked. |
modeFlags |
Int: The access modes to check. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
Return | |
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Int |
PackageManager#PERMISSION_GRANTED if the caller is allowed to access that uri, or PackageManager#PERMISSION_DENIED if it is not. Value is android.content.pm.PackageManager#PERMISSION_GRANTED , or android.content.pm.PackageManager#PERMISSION_DENIED |
checkCallingOrSelfUriPermissions
open fun checkCallingOrSelfUriPermissions(
uris: MutableList<Uri!>,
modeFlags: Int
): IntArray
Determine whether the calling process of an IPC or you has been granted permission to access a list of URIs. This is the same as checkCallingUriPermission
, except it grants your own permissions if you are not currently processing an IPC. Use with care!
Parameters | |
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uris |
MutableList<Uri!>: This value cannot be null . |
modeFlags |
Int: The access modes to check. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
Return | |
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IntArray |
This value cannot be null . |
checkCallingPermission
open fun checkCallingPermission(permission: String): Int
Parameters | |
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permission |
String: The name of the permission being checked. This value cannot be null . |
Return | |
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Int |
PackageManager#PERMISSION_GRANTED if the calling pid/uid is allowed that permission, or PackageManager#PERMISSION_DENIED if it is not. Value is android.content.pm.PackageManager#PERMISSION_GRANTED , or android.content.pm.PackageManager#PERMISSION_DENIED |
checkCallingUriPermission
open fun checkCallingUriPermission(
uri: Uri!,
modeFlags: Int
): Int
Parameters | |
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uri |
Uri!: The uri that is being checked. |
modeFlags |
Int: The access modes to check. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
Return | |
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Int |
PackageManager#PERMISSION_GRANTED if the caller is allowed to access that uri, or PackageManager#PERMISSION_DENIED if it is not. Value is android.content.pm.PackageManager#PERMISSION_GRANTED , or android.content.pm.PackageManager#PERMISSION_DENIED |
checkCallingUriPermissions
open fun checkCallingUriPermissions(
uris: MutableList<Uri!>,
modeFlags: Int
): IntArray
Determine whether the calling process and uid has been granted permission to access a list of URIs. This is basically the same as calling checkUriPermissions(java.util.List,int,int,int)
with the pid and uid returned by android.os.Binder#getCallingPid
and android.os.Binder#getCallingUid
. One important difference is that if you are not currently processing an IPC, this function will always fail.
Parameters | |
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uris |
MutableList<Uri!>: This value cannot be null . |
modeFlags |
Int: The access modes to check. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
Return | |
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IntArray |
This value cannot be null . |
checkContentUriPermissionFull
open fun checkContentUriPermissionFull(
uri: Uri,
pid: Int,
uid: Int,
modeFlags: Int
): Int
Determine whether a particular process and uid has been granted permission to access a specific content URI.
Unlike checkUriPermission(android.net.Uri,int,int,int)
, this method checks for general access to the URI's content provider, as well as explicitly granted permissions.
Note, this check will throw an IllegalArgumentException
for non-content URIs.
Parameters | |
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uri |
Uri: This value cannot be null . |
pid |
Int: (Optional) The process ID being checked against. If the pid is unknown, pass -1. |
uid |
Int: The UID being checked against. A uid of 0 is the root user, which will pass every permission check. |
modeFlags |
Int: The access modes to check. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
Return | |
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Int |
PackageManager#PERMISSION_GRANTED if the given pid/uid is allowed to access that uri, or PackageManager#PERMISSION_DENIED if it is not. Value is android.content.pm.PackageManager#PERMISSION_GRANTED , or android.content.pm.PackageManager#PERMISSION_DENIED |
checkPermission
open fun checkPermission(
permission: String,
pid: Int,
uid: Int
): Int
Parameters | |
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permission |
String: The name of the permission being checked. This value cannot be null . |
pid |
Int: The process ID being checked against. Must be > 0. |
uid |
Int: The UID being checked against. A uid of 0 is the root user, which will pass every permission check. |
Return | |
---|---|
Int |
PackageManager#PERMISSION_GRANTED if the given pid/uid is allowed that permission, or PackageManager#PERMISSION_DENIED if it is not. Value is android.content.pm.PackageManager#PERMISSION_GRANTED , or android.content.pm.PackageManager#PERMISSION_DENIED |
checkSelfPermission
open fun checkSelfPermission(permission: String): Int
Parameters | |
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permission |
String: The name of the permission being checked. This value cannot be null . |
Return | |
---|---|
Int |
PackageManager#PERMISSION_GRANTED if you have the permission, or PackageManager#PERMISSION_DENIED if not. Value is android.content.pm.PackageManager#PERMISSION_GRANTED , or android.content.pm.PackageManager#PERMISSION_DENIED |
checkUriPermission
open fun checkUriPermission(
uri: Uri!,
pid: Int,
uid: Int,
modeFlags: Int
): Int
Parameters | |
---|---|
uri |
Uri!: The uri that is being checked. |
pid |
Int: The process ID being checked against. Must be > 0. |
uid |
Int: The UID being checked against. A uid of 0 is the root user, which will pass every permission check. |
modeFlags |
Int: The access modes to check. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
Return | |
---|---|
Int |
PackageManager#PERMISSION_GRANTED if the given pid/uid is allowed to access that uri, or PackageManager#PERMISSION_DENIED if it is not. Value is android.content.pm.PackageManager#PERMISSION_GRANTED , or android.content.pm.PackageManager#PERMISSION_DENIED |
checkUriPermission
open fun checkUriPermission(
uri: Uri?,
readPermission: String?,
writePermission: String?,
pid: Int,
uid: Int,
modeFlags: Int
): Int
Check both a Uri and normal permission. This allows you to perform both checkPermission
and #checkUriPermission in one call.
Parameters | |
---|---|
uri |
Uri?: This value may be null . |
readPermission |
String?: This value may be null . |
writePermission |
String?: This value may be null . |
pid |
Int: The process ID being checked against. Must be > 0. |
uid |
Int: The UID being checked against. A uid of 0 is the root user, which will pass every permission check. |
modeFlags |
Int: The access modes to check. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
Return | |
---|---|
Int |
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. Value is android.content.pm.PackageManager#PERMISSION_GRANTED , or android.content.pm.PackageManager#PERMISSION_DENIED |
checkUriPermissions
open fun checkUriPermissions(
uris: MutableList<Uri!>,
pid: Int,
uid: Int,
modeFlags: Int
): IntArray
Determine whether a particular process and uid has been granted permission to access a list of URIs. 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. Note: On SDK Version android.os.Build.VERSION_CODES#S
, calling this method from a secondary-user's context will incorrectly return PackageManager#PERMISSION_DENIED
for all {code uris}.
Parameters | |
---|---|
uris |
MutableList<Uri!>: This value cannot be null . |
pid |
Int: The process ID being checked against. Must be > 0. |
uid |
Int: The UID being checked against. A uid of 0 is the root user, which will pass every permission check. |
modeFlags |
Int: The access modes to check for the list of uris Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
Return | |
---|---|
IntArray |
This value cannot be null . |
createAttributionContext
open fun createAttributionContext(attributionTag: String?): Context
Return a new Context object for the current Context but attribute to a different tag. In complex apps attribution tagging can be used to distinguish between separate logical parts.
Parameters | |
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attributionTag |
String?: This value may be null . |
Return | |
---|---|
Context |
This value cannot be null . |
createConfigurationContext
open fun createConfigurationContext(overrideConfiguration: Configuration): Context!
Parameters | |
---|---|
overrideConfiguration |
Configuration: A Configuration specifying what values to modify in the base Configuration of the original Context's resources. If the base configuration changes (such as due to an orientation change), the resources of this context will also change except for those that have been explicitly overridden with a value here. This value cannot be null . |
Return | |
---|---|
Context! |
A Context with the given configuration override. |
createContext
open fun createContext(contextParams: ContextParams): Context
Creates a context with specific properties and behaviors.
Parameters | |
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contextParams |
ContextParams: This value cannot be null . |
Return | |
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Context |
This value cannot be null . |
createDeviceContext
open fun createDeviceContext(deviceId: Int): Context
Returns a new Context
object from the current context but with device association given by the deviceId
. Each call to this method returns a new instance of a context object. Context objects are not shared; however, common state (such as the ClassLoader
and other resources for the same configuration) can be shared, so the Context
itself is lightweight.
Applications that run on virtual devices may use this method to access the default device capabilities and functionality (by passing Context#DEVICE_ID_DEFAULT
. Similarly, applications running on the default device may access the functionality of virtual devices.
Note that the newly created instance will be associated with the same display as the parent Context, regardless of the device ID passed here.
Parameters | |
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deviceId |
Int: The ID of the device to associate with this context. |
Return | |
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Context |
This value cannot be null . |
Exceptions | |
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java.lang.IllegalArgumentException |
if the given device ID is not a valid ID of the default device or a virtual device. |
createDeviceProtectedStorageContext
open fun createDeviceProtectedStorageContext(): Context!
createDisplayContext
open fun createDisplayContext(display: Display): Context!
Parameters | |
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display |
Display: The display to which the current context's resources are adjusted. This value cannot be null . |
Return | |
---|---|
Context! |
A context for the display. |
createPackageContext
open fun createPackageContext(
packageName: String!,
flags: Int
): Context!
Parameters | |
---|---|
packageName |
String!: Name of the application's package. |
flags |
Int: Option flags. Value is either 0 or a combination of android.content.Context#CONTEXT_INCLUDE_CODE , android.content.Context#CONTEXT_IGNORE_SECURITY , android.content.Context#CONTEXT_RESTRICTED , android.content.Context.CONTEXT_DEVICE_PROTECTED_STORAGE, android.content.Context.CONTEXT_CREDENTIAL_PROTECTED_STORAGE, and android.content.Context.CONTEXT_REGISTER_PACKAGE |
Return | |
---|---|
Context! |
A Context for the application. |
Exceptions | |
---|---|
java.lang.SecurityException |
|
android.content.pm.PackageManager.NameNotFoundException |
if there is no application with the given package name. |
createWindowContext
open fun createWindowContext(
type: Int,
options: Bundle?
): Context
Creates a Context for a non-activity window.
A window context is a context that can be used to add non-activity windows, such as android.view.WindowManager.LayoutParams#TYPE_APPLICATION_OVERLAY
. A window context must be created from a context that has an associated Display
, such as Activity
or a context created with createDisplayContext(android.view.Display)
.
The window context is created with the appropriate Configuration
for the area of the display that the windows created with it can occupy; it must be used when inflating
views, such that they can be inflated with proper Resources
. Below is a sample code to add an application overlay window on the primary display:
... final DisplayManager dm = anyContext.getSystemService(DisplayManager.class); final Display primaryDisplay = dm.getDisplay(DEFAULT_DISPLAY); final Context windowContext = anyContext.createDisplayContext(primaryDisplay) .createWindowContext(TYPE_APPLICATION_OVERLAY, null); final View overlayView = Inflater.from(windowContext).inflate(someLayoutXml, null); // WindowManager.LayoutParams initialization ... // The types used in addView and createWindowContext must match. mParams.type = TYPE_APPLICATION_OVERLAY; ... windowContext.getSystemService(WindowManager.class).addView(overlayView, mParams);
This context's configuration and resources are adjusted to an area of the display where the windows with provided type will be added. Note that all windows associated with the same context will have an affinity and can only be moved together between different displays or areas on a display. If there is a need to add different window types, or non-associated windows, separate Contexts should be used.
Creating a window context is an expensive operation. Misuse of this API may lead to a huge performance drop. The best practice is to use the same window context when possible. An approach is to create one window context with specific window type and display and use it everywhere it's needed.
After Build.VERSION_CODES#S
, window context provides the capability to receive configuration changes for existing token by overriding the token
of the android.view.WindowManager.LayoutParams
passed in WindowManager#addView(View, LayoutParams)
. This is useful when an application needs to attach its window to an existing activity for window token sharing use-case.
Note that the window context in Build.VERSION_CODES#R
didn't have this capability. This is a no-op for the window context in Build.VERSION_CODES#R
.
final DisplayManager dm = anyContext.getSystemService(DisplayManager.class); final Display primaryDisplay = dm.getDisplay(DEFAULT_DISPLAY); final Context windowContext = anyContext.createWindowContext(primaryDisplay, TYPE_APPLICATION, null); // Get an existing token. final IBinder existingToken = activity.getWindow().getAttributes().token; // The types used in addView() and createWindowContext() must match. final WindowManager.LayoutParams params = new WindowManager.LayoutParams(TYPE_APPLICATION); params.token = existingToken; // After WindowManager#addView(), the server side will extract the provided token from // LayoutParams#token (existingToken in the sample code), and switch to propagate // configuration changes from the node associated with the provided token. windowContext.getSystemService(WindowManager.class).addView(overlayView, mParams);
After Build.VERSION_CODES#S
, window context provides the capability to listen to its Configuration
changes by calling registerComponentCallbacks(android.content.ComponentCallbacks)
, while other kinds of Context
will register the ComponentCallbacks
to its
. Note that window context only propagate ComponentCallbacks#onConfigurationChanged(Configuration)
callback. ComponentCallbacks#onLowMemory()
or other callbacks in ComponentCallbacks2
won't be invoked.
Note that using android.app.Application
or android.app.Service
context for UI-related queries may result in layout or continuity issues on devices with variable screen sizes (e.g. foldables) or in multi-window modes, since these non-UI contexts may not reflect the Configuration
changes for the visual container.
Parameters | |
---|---|
type |
Int: Value is android.view.WindowManager.LayoutParams#TYPE_BASE_APPLICATION , android.view.WindowManager.LayoutParams#TYPE_APPLICATION , android.view.WindowManager.LayoutParams#TYPE_APPLICATION_STARTING , android.view.WindowManager.LayoutParams#TYPE_DRAWN_APPLICATION , android.view.WindowManager.LayoutParams#TYPE_APPLICATION_PANEL , android.view.WindowManager.LayoutParams#TYPE_APPLICATION_MEDIA , android.view.WindowManager.LayoutParams#TYPE_APPLICATION_SUB_PANEL , android.view.WindowManager.LayoutParams#TYPE_APPLICATION_ATTACHED_DIALOG , android.view.WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA_OVERLAY, android.view.WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL, android.view.WindowManager.LayoutParams#TYPE_STATUS_BAR , android.view.WindowManager.LayoutParams#TYPE_SEARCH_BAR , android.view.WindowManager.LayoutParams#TYPE_PHONE , android.view.WindowManager.LayoutParams#TYPE_SYSTEM_ALERT , android.view.WindowManager.LayoutParams.TYPE_KEYGUARD, android.view.WindowManager.LayoutParams#TYPE_TOAST , android.view.WindowManager.LayoutParams#TYPE_SYSTEM_OVERLAY , android.view.WindowManager.LayoutParams#TYPE_PRIORITY_PHONE , android.view.WindowManager.LayoutParams#TYPE_SYSTEM_DIALOG , android.view.WindowManager.LayoutParams#TYPE_KEYGUARD_DIALOG , android.view.WindowManager.LayoutParams#TYPE_SYSTEM_ERROR , android.view.WindowManager.LayoutParams#TYPE_INPUT_METHOD , android.view.WindowManager.LayoutParams#TYPE_INPUT_METHOD_DIALOG , android.view.WindowManager.LayoutParams#TYPE_WALLPAPER , android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR_PANEL, android.view.WindowManager.LayoutParams.TYPE_SECURE_SYSTEM_OVERLAY, android.view.WindowManager.LayoutParams.TYPE_DRAG, android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR_SUB_PANEL, android.view.WindowManager.LayoutParams.TYPE_POINTER, android.view.WindowManager.LayoutParams.TYPE_NAVIGATION_BAR, android.view.WindowManager.LayoutParams.TYPE_VOLUME_OVERLAY, android.view.WindowManager.LayoutParams.TYPE_BOOT_PROGRESS, android.view.WindowManager.LayoutParams.TYPE_INPUT_CONSUMER, android.view.WindowManager.LayoutParams.TYPE_NAVIGATION_BAR_PANEL, android.view.WindowManager.LayoutParams.TYPE_DISPLAY_OVERLAY, android.view.WindowManager.LayoutParams.TYPE_MAGNIFICATION_OVERLAY, android.view.WindowManager.LayoutParams#TYPE_PRIVATE_PRESENTATION , android.view.WindowManager.LayoutParams.TYPE_VOICE_INTERACTION, android.view.WindowManager.LayoutParams#TYPE_ACCESSIBILITY_OVERLAY , android.view.WindowManager.LayoutParams.TYPE_VOICE_INTERACTION_STARTING, android.view.WindowManager.LayoutParams.TYPE_DOCK_DIVIDER, android.view.WindowManager.LayoutParams.TYPE_QS_DIALOG, android.view.WindowManager.LayoutParams.TYPE_SCREENSHOT, android.view.WindowManager.LayoutParams.TYPE_PRESENTATION, android.view.WindowManager.LayoutParams#TYPE_APPLICATION_OVERLAY , android.view.WindowManager.LayoutParams.TYPE_ACCESSIBILITY_MAGNIFICATION_OVERLAY, android.view.WindowManager.LayoutParams.TYPE_NOTIFICATION_SHADE, or android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR_ADDITIONAL |
options |
Bundle?: This value may be null . |
Return | |
---|---|
Context |
This value cannot be null . |
Exceptions | |
---|---|
java.lang.UnsupportedOperationException |
if this Context does not attach to a display, such as Application or Service . |
createWindowContext
open fun createWindowContext(
display: Display,
type: Int,
options: Bundle?
): Context
Creates a Context
for a non-activity
window on the given Display
.
Similar to createWindowContext(int,android.os.Bundle)
, but the display
is passed in, instead of implicitly using the original Context's Display
.
Parameters | |
---|---|
display |
Display: This value cannot be null . |
type |
Int: Value is android.view.WindowManager.LayoutParams#TYPE_BASE_APPLICATION , android.view.WindowManager.LayoutParams#TYPE_APPLICATION , android.view.WindowManager.LayoutParams#TYPE_APPLICATION_STARTING , android.view.WindowManager.LayoutParams#TYPE_DRAWN_APPLICATION , android.view.WindowManager.LayoutParams#TYPE_APPLICATION_PANEL , android.view.WindowManager.LayoutParams#TYPE_APPLICATION_MEDIA , android.view.WindowManager.LayoutParams#TYPE_APPLICATION_SUB_PANEL , android.view.WindowManager.LayoutParams#TYPE_APPLICATION_ATTACHED_DIALOG , android.view.WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA_OVERLAY, android.view.WindowManager.LayoutParams.TYPE_APPLICATION_ABOVE_SUB_PANEL, android.view.WindowManager.LayoutParams#TYPE_STATUS_BAR , android.view.WindowManager.LayoutParams#TYPE_SEARCH_BAR , android.view.WindowManager.LayoutParams#TYPE_PHONE , android.view.WindowManager.LayoutParams#TYPE_SYSTEM_ALERT , android.view.WindowManager.LayoutParams.TYPE_KEYGUARD, android.view.WindowManager.LayoutParams#TYPE_TOAST , android.view.WindowManager.LayoutParams#TYPE_SYSTEM_OVERLAY , android.view.WindowManager.LayoutParams#TYPE_PRIORITY_PHONE , android.view.WindowManager.LayoutParams#TYPE_SYSTEM_DIALOG , android.view.WindowManager.LayoutParams#TYPE_KEYGUARD_DIALOG , android.view.WindowManager.LayoutParams#TYPE_SYSTEM_ERROR , android.view.WindowManager.LayoutParams#TYPE_INPUT_METHOD , android.view.WindowManager.LayoutParams#TYPE_INPUT_METHOD_DIALOG , android.view.WindowManager.LayoutParams#TYPE_WALLPAPER , android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR_PANEL, android.view.WindowManager.LayoutParams.TYPE_SECURE_SYSTEM_OVERLAY, android.view.WindowManager.LayoutParams.TYPE_DRAG, android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR_SUB_PANEL, android.view.WindowManager.LayoutParams.TYPE_POINTER, android.view.WindowManager.LayoutParams.TYPE_NAVIGATION_BAR, android.view.WindowManager.LayoutParams.TYPE_VOLUME_OVERLAY, android.view.WindowManager.LayoutParams.TYPE_BOOT_PROGRESS, android.view.WindowManager.LayoutParams.TYPE_INPUT_CONSUMER, android.view.WindowManager.LayoutParams.TYPE_NAVIGATION_BAR_PANEL, android.view.WindowManager.LayoutParams.TYPE_DISPLAY_OVERLAY, android.view.WindowManager.LayoutParams.TYPE_MAGNIFICATION_OVERLAY, android.view.WindowManager.LayoutParams#TYPE_PRIVATE_PRESENTATION , android.view.WindowManager.LayoutParams.TYPE_VOICE_INTERACTION, android.view.WindowManager.LayoutParams#TYPE_ACCESSIBILITY_OVERLAY , android.view.WindowManager.LayoutParams.TYPE_VOICE_INTERACTION_STARTING, android.view.WindowManager.LayoutParams.TYPE_DOCK_DIVIDER, android.view.WindowManager.LayoutParams.TYPE_QS_DIALOG, android.view.WindowManager.LayoutParams.TYPE_SCREENSHOT, android.view.WindowManager.LayoutParams.TYPE_PRESENTATION, android.view.WindowManager.LayoutParams#TYPE_APPLICATION_OVERLAY , android.view.WindowManager.LayoutParams.TYPE_ACCESSIBILITY_MAGNIFICATION_OVERLAY, android.view.WindowManager.LayoutParams.TYPE_NOTIFICATION_SHADE, or android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR_ADDITIONAL |
options |
Bundle?: This value may be null . |
Return | |
---|---|
Context |
This value cannot be null . |
Exceptions | |
---|---|
java.lang.IllegalArgumentException |
if the Display is null . |
databaseList
open fun databaseList(): Array<String!>!
Return | |
---|---|
Array<String!>! |
Array of strings naming the private databases. |
deleteDatabase
open fun deleteDatabase(name: String!): Boolean
Parameters | |
---|---|
name |
String!: The name (unique in the application package) of the database. |
Return | |
---|---|
Boolean |
true if the database was successfully deleted; else false . |
deleteFile
open fun deleteFile(name: String!): Boolean
Parameters | |
---|---|
name |
String!: The name of the file to delete; can not contain path separators. |
Return | |
---|---|
Boolean |
true if the file was successfully deleted; else false . |
deleteSharedPreferences
open fun deleteSharedPreferences(: String!): Boolean
Parameters | |
---|---|
name |
String!: The name (unique in the application package) of the shared preferences file. |
Return | |
---|---|
Boolean |
true if the shared preferences file was successfully deleted; else false . |
enforceCallingOrSelfPermission
open fun enforceCallingOrSelfPermission(
permission: String,
message: String?
): Unit
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
, except it grants your own permissions if you are not currently processing an IPC. Use with care!
Parameters | |
---|---|
permission |
String: The name of the permission being checked. This value cannot be null . |
message |
String?: This value may be null . |
enforceCallingOrSelfUriPermission
open fun enforceCallingOrSelfUriPermission(
uri: Uri!,
modeFlags: Int,
message: String!
): Unit
Parameters | |
---|---|
uri |
Uri!: The uri that is being checked. |
modeFlags |
Int: The access modes to enforce. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
message |
String!: A message to include in the exception if it is thrown. |
enforceCallingPermission
open fun enforceCallingPermission(
permission: String,
message: String?
): Unit
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(java.lang.String,int,int,java.lang.String)
with the pid and uid returned by android.os.Binder#getCallingPid
and android.os.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
to avoid this protection.
Parameters | |
---|---|
permission |
String: The name of the permission being checked. This value cannot be null . |
message |
String?: This value may be null . |
enforceCallingUriPermission
open fun enforceCallingUriPermission(
uri: Uri!,
modeFlags: Int,
message: String!
): Unit
Parameters | |
---|---|
uri |
Uri!: The uri that is being checked. |
modeFlags |
Int: The access modes to enforce. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
message |
String!: A message to include in the exception if it is thrown. |
enforcePermission
open fun enforcePermission(
permission: String,
pid: Int,
uid: Int,
message: String?
): Unit
If the given permission is not allowed for a particular process and user ID running in the system, throw a SecurityException
.
Parameters | |
---|---|
permission |
String: The name of the permission being checked. This value cannot be null . |
pid |
Int: The process ID being checked against. Must be > 0. |
uid |
Int: The UID being checked against. A uid of 0 is the root user, which will pass every permission check. |
message |
String?: This value may be null . |
enforceUriPermission
open fun enforceUriPermission(
uri: Uri!,
pid: Int,
uid: Int,
modeFlags: Int,
message: String!
): Unit
Parameters | |
---|---|
uri |
Uri!: The uri that is being checked. |
pid |
Int: The process ID being checked against. Must be > 0. |
uid |
Int: The UID being checked against. A uid of 0 is the root user, which will pass every permission check. |
modeFlags |
Int: The access modes to enforce. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
message |
String!: A message to include in the exception if it is thrown. |
enforceUriPermission
open fun enforceUriPermission(
uri: Uri?,
readPermission: String?,
writePermission: String?,
pid: Int,
uid: Int,
modeFlags: Int,
message: String?
): Unit
Enforce both a Uri and normal permission. This allows you to perform both enforcePermission
and #enforceUriPermission in one call.
Parameters | |
---|---|
uri |
Uri?: This value may be null . |
readPermission |
String?: This value may be null . |
writePermission |
String?: This value may be null . |
pid |
Int: The process ID being checked against. Must be > 0. |
uid |
Int: The UID being checked against. A uid of 0 is the root user, which will pass every permission check. |
modeFlags |
Int: The access modes to enforce. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
message |
String?: This value may be null . |
fileList
open fun fileList(): Array<String!>!
Return | |
---|---|
Array<String!>! |
Array of strings naming the private files. |
getAssets
open fun getAssets(): AssetManager!
Return | |
---|---|
AssetManager! |
an AssetManager instance for the application's package |
getAttributionSource
open fun getAttributionSource(): AttributionSource
Return | |
---|---|
AttributionSource |
This value cannot be null . |
getBaseContext
open fun getBaseContext(): Context!
Return | |
---|---|
Context! |
the base context as set by the constructor or setBaseContext |
getCacheDir
open fun getCacheDir(): File!
Return | |
---|---|
File! |
The path of the directory holding application cache files. |
getCodeCacheDir
open fun getCodeCacheDir(): File!
Return | |
---|---|
File! |
The path of the directory holding application code cache files. |
getDatabasePath
open fun getDatabasePath(name: String!): File!
Parameters | |
---|---|
name |
String!: The name of the database for which you would like to get its path. |
Return | |
---|---|
File! |
An absolute path to the given database. |
getDeviceId
open fun getDeviceId(): Int
Return | |
---|---|
Int |
the ID of the device this context is associated with. |
getDir
open fun getDir(
name: String!,
mode: Int
): File!
Parameters | |
---|---|
name |
String!: Name of the directory to retrieve. This is a directory that is created as part of your application data. |
mode |
Int: Operating mode. Value is either 0 or a combination of android.content.Context#MODE_PRIVATE , android.content.Context#MODE_WORLD_READABLE , android.content.Context#MODE_WORLD_WRITEABLE , and android.content.Context#MODE_APPEND |
Return | |
---|---|
File! |
A File object for the requested directory. The directory will have been created if it does not already exist. |
getDisplay
open fun getDisplay(): Display!
Get the display this context is associated with. Applications should use this method with android.app.Activity
or a context associated with a Display
via createDisplayContext(android.view.Display)
to get a display object associated with a Context, or android.hardware.display.DisplayManager#getDisplay
to get a display object by id.
Return | |
---|---|
Display! |
This value may be null . |
Exceptions | |
---|---|
java.lang.UnsupportedOperationException |
if the method is called on an instance that is not associated with any display. |
getExternalCacheDir
open fun getExternalCacheDir(): File?
Returns absolute path to application-specific directory on the primary shared/external storage device where the application can place cache files it owns. These files are internal to the application, and not typically visible to the user as media.
This is like getCacheDir()
in that these files will be deleted when the application is uninstalled, however there are some important differences:
- The platform does not always monitor the space available in shared storage, and thus may not automatically delete these files. Apps should always manage the maximum space used in this location. Currently the only time files here will be deleted by the platform is when running on
android.os.Build.VERSION_CODES#JELLY_BEAN_MR1
or later andEnvironment#isExternalStorageEmulated(File)
returns true. - Shared storage may not always be available, since removable media can be ejected by the user. Media state can be checked using
Environment#getExternalStorageState(File)
. - There is no security enforced with these files. For example, any application holding
android.Manifest.permission#WRITE_EXTERNAL_STORAGE
can write to these files.
If a shared storage device is emulated (as determined by Environment#isExternalStorageEmulated(File)
), its contents are backed by a private user data partition, which means there is little benefit to storing data here instead of the private directory returned by getCacheDir()
.
Starting in android.os.Build.VERSION_CODES#KITKAT
, no permissions are required to read or write to the returned path; it's always accessible to the calling app. This only applies to paths generated for package name of the calling application. To access paths belonging to other packages, android.Manifest.permission#WRITE_EXTERNAL_STORAGE
and/or android.Manifest.permission#READ_EXTERNAL_STORAGE
are required.
On devices with multiple users (as described by UserManager
), each user has their own isolated shared storage. Applications only have access to the shared storage for the user they're running as.
The returned path may change over time if different shared storage media is inserted, so only relative paths should be persisted.
Return | |
---|---|
File? |
This value may be null . |
getExternalCacheDirs
open fun getExternalCacheDirs(): Array<File!>!
Return | |
---|---|
Array<File!>! |
the absolute paths to application-specific directories. Some individual paths may be null if that shared storage is not currently available. The first path returned is the same as getExternalCacheDir() . |
getExternalFilesDir
open fun getExternalFilesDir(type: String?): File?
Returns the absolute path to the directory on the primary shared/external storage device where the application can place persistent files it owns. These files are internal to the applications, and not typically visible to the user as media.
This is like getFilesDir()
in that these files will be deleted when the application is uninstalled, however there are some important differences:
- Shared storage may not always be available, since removable media can be ejected by the user. Media state can be checked using
Environment#getExternalStorageState(File)
. - There is no security enforced with these files. For example, any application holding
android.Manifest.permission#WRITE_EXTERNAL_STORAGE
can write to these files.
If a shared storage device is emulated (as determined by Environment#isExternalStorageEmulated(File)
), its contents are backed by a private user data partition, which means there is little benefit to storing data here instead of the private directories returned by getFilesDir()
, etc.
Starting in android.os.Build.VERSION_CODES#KITKAT
, no permissions are required to read or write to the returned path; it's always accessible to the calling app. This only applies to paths generated for package name of the calling application. To access paths belonging to other packages, android.Manifest.permission#WRITE_EXTERNAL_STORAGE
and/or android.Manifest.permission#READ_EXTERNAL_STORAGE
are required.
On devices with multiple users (as described by UserManager
), each user has their own isolated shared storage. Applications only have access to the shared storage for the user they're running as.
The returned path may change over time if different shared storage media is inserted, so only relative paths should be persisted.
Here is an example of typical code to manipulate a file in an application's shared storage:
If you supply a non-null type to this function, the returned file will be a path to a sub-directory of the given type. Though these files are not automatically scanned by the media scanner, you can explicitly add them to the media database with MediaScannerConnection.scanFile
. Note that this is not the same as Environment.getExternalStoragePublicDirectory()
, which provides directories of media shared by all applications. The directories returned here are owned by the application, and their contents will be removed when the application is uninstalled. Unlike Environment.getExternalStoragePublicDirectory()
, the directory returned here will be automatically created for you.
Here is an example of typical code to manipulate a picture in an application's shared storage and add it to the media database:
Parameters | |
---|---|
type |
String?: This value may be null . |
Return | |
---|---|
File? |
This value may be null . |
getExternalFilesDirs
open fun getExternalFilesDirs(type: String!): Array<File!>!
Parameters | |
---|---|
type |
String!: The type of files directory to return. May be null for the root of the files directory or one of the following constants for a subdirectory: android.os.Environment#DIRECTORY_MUSIC , android.os.Environment#DIRECTORY_PODCASTS , android.os.Environment#DIRECTORY_RINGTONES , android.os.Environment#DIRECTORY_ALARMS , android.os.Environment#DIRECTORY_NOTIFICATIONS , android.os.Environment#DIRECTORY_PICTURES , or android.os.Environment#DIRECTORY_MOVIES . |
Return | |
---|---|
Array<File!>! |
the absolute paths to application-specific directories. Some individual paths may be null if that shared storage is not currently available. The first path returned is the same as getExternalFilesDir(java.lang.String) . |
getExternalMediaDirs
open fun getExternalMediaDirs(): Array<File!>!
Return | |
---|---|
Array<File!>! |
the absolute paths to application-specific directories. Some individual paths may be null if that shared storage is not currently available. |
getFileStreamPath
open fun getFileStreamPath(name: String!): File!
Parameters | |
---|---|
name |
String!: The name of the file for which you would like to get its path. |
Return | |
---|---|
File! |
An absolute path to the given file. |
getFilesDir
open fun getFilesDir(): File!
Return | |
---|---|
File! |
The path of the directory holding application files. |
getMainLooper
open fun getMainLooper(): Looper!
Return | |
---|---|
Looper! |
The main looper. |
getNoBackupFilesDir
open fun getNoBackupFilesDir(): File!
Return | |
---|---|
File! |
The path of the directory holding application files that will not be automatically backed up to remote storage. |
getObbDir
open fun getObbDir(): File!
Return | |
---|---|
File! |
the absolute path to application-specific directory. May return null if shared storage is not currently available. |
getObbDirs
open fun getObbDirs(): Array<File!>!
Return | |
---|---|
Array<File!>! |
the absolute paths to application-specific directories. Some individual paths may be null if that shared storage is not currently available. The first path returned is the same as getObbDir() |
getPackageCodePath
open fun getPackageCodePath(): String!
Return | |
---|---|
String! |
String Path to the code and assets. |
getPackageResourcePath
open fun getPackageResourcePath(): String!
Return | |
---|---|
String! |
String Path to the resources. |
getParams
open fun getParams(): ContextParams?
Return the set of parameters which this Context was created with, if it was created via createContext(android.content.ContextParams)
.
Return | |
---|---|
ContextParams? |
This value may be null . |
getResources
open fun getResources(): Resources!
Return | |
---|---|
Resources! |
a Resources instance for the application's package |
getSharedPreferences
open fun getSharedPreferences(
: String!,
: Int
): SharedPreferences!
Parameters | |
---|---|
name |
String!: Desired preferences file. |
mode |
Int: Operating mode. Value is either 0 or a combination of android.content.Context#MODE_PRIVATE , android.content.Context#MODE_WORLD_READABLE , android.content.Context#MODE_WORLD_WRITEABLE , and android.content.Context#MODE_MULTI_PROCESS |
Return | |
---|---|
SharedPreferences! |
The single SharedPreferences instance that can be used to retrieve and modify the preference values. |
getSystemService
open fun getSystemService(name: String): Any!
Return | |
---|---|
Any! |
The service or null if the name does not exist. |
getSystemServiceName
open fun getSystemServiceName(serviceClass: Class<*>): String?
Parameters | |
---|---|
serviceClass |
Class<*>: The class of the desired service. This value cannot be null . |
Return | |
---|---|
String? |
The service name or null if the class is not a supported system service. |
getWallpaper
open fungetWallpaper(): Drawable!
Deprecated: Deprecated in Java.
getWallpaperDesiredMinimumHeight
open fungetWallpaperDesiredMinimumHeight(): Int
Deprecated: Deprecated in Java.
getWallpaperDesiredMinimumWidth
open fungetWallpaperDesiredMinimumWidth(): Int
Deprecated: Deprecated in Java.
grantUriPermission
open fun grantUriPermission(
toPackage: String!,
uri: Uri!,
modeFlags: Int
): Unit
Parameters | |
---|---|
toPackage |
String!: The package you would like to allow to access the Uri. |
uri |
Uri!: The Uri you would like to grant access to. |
modeFlags |
Int: The desired access modes. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION , android.content.Intent#FLAG_GRANT_PERSISTABLE_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_PREFIX_URI_PERMISSION |
isRestricted
open fun isRestricted(): Boolean
Return | |
---|---|
Boolean |
true if this Context is restricted, false otherwise. |
moveDatabaseFrom
open fun moveDatabaseFrom(
sourceContext: Context!,
name: String!
): Boolean
Parameters | |
---|---|
sourceContext |
Context!: The source context which contains the existing database to move. |
name |
String!: The name of the database file. |
Return | |
---|---|
Boolean |
true if the move was successful or if the database didn't exist in the source context, otherwise false . |
moveSharedPreferencesFrom
open fun moveSharedPreferencesFrom(
: Context!,
: String!
): Boolean
Parameters | |
---|---|
sourceContext |
Context!: The source context which contains the existing shared preferences to move. |
name |
String!: The name of the shared preferences file. |
Return | |
---|---|
Boolean |
true if the move was successful or if the shared preferences didn't exist in the source context, otherwise false . |
openFileInput
open fun openFileInput(name: String!): FileInputStream!
Parameters | |
---|---|
name |
String!: The name of the file to open; can not contain path separators. |
Return | |
---|---|
FileInputStream! |
The resulting FileInputStream . |
openFileOutput
open fun openFileOutput(
name: String!,
mode: Int
): FileOutputStream!
Parameters | |
---|---|
name |
String!: The name of the file to open; can not contain path separators. |
mode |
Int: Operating mode. Value is either 0 or a combination of android.content.Context#MODE_PRIVATE , android.content.Context#MODE_WORLD_READABLE , android.content.Context#MODE_WORLD_WRITEABLE , and android.content.Context#MODE_APPEND |
Return | |
---|---|
FileOutputStream! |
The resulting FileOutputStream . |
openOrCreateDatabase
open fun openOrCreateDatabase(
name: String!,
mode: Int,
factory: SQLiteDatabase.CursorFactory!
): SQLiteDatabase!
Parameters | |
---|---|
name |
String!: The name (unique in the application package) of the database. |
mode |
Int: Operating mode. Value is either 0 or a combination of android.content.Context#MODE_PRIVATE , android.content.Context#MODE_WORLD_READABLE , android.content.Context#MODE_WORLD_WRITEABLE , android.content.Context#MODE_ENABLE_WRITE_AHEAD_LOGGING , and android.content.Context#MODE_NO_LOCALIZED_COLLATORS |
factory |
SQLiteDatabase.CursorFactory!: An optional factory class that is called to instantiate a cursor when query is called. |
Return | |
---|---|
SQLiteDatabase! |
The contents of a newly created database with the given name. |
Exceptions | |
---|---|
android.database.sqlite.SQLiteException |
if the database file could not be opened. |
openOrCreateDatabase
open fun openOrCreateDatabase(
name: String!,
mode: Int,
factory: SQLiteDatabase.CursorFactory!,
errorHandler: DatabaseErrorHandler?
): SQLiteDatabase!
Open a new private SQLiteDatabase associated with this Context's application package. Creates the database file if it doesn't exist.
Accepts input param: a concrete instance of DatabaseErrorHandler
to be used to handle corruption when sqlite reports database corruption.
Parameters | |
---|---|
name |
String!: The name (unique in the application package) of the database. |
mode |
Int: Operating mode. Value is either 0 or a combination of android.content.Context#MODE_PRIVATE , android.content.Context#MODE_WORLD_READABLE , android.content.Context#MODE_WORLD_WRITEABLE , android.content.Context#MODE_ENABLE_WRITE_AHEAD_LOGGING , and android.content.Context#MODE_NO_LOCALIZED_COLLATORS |
factory |
SQLiteDatabase.CursorFactory!: An optional factory class that is called to instantiate a cursor when query is called. |
errorHandler |
DatabaseErrorHandler?: This value may be null . |
Return | |
---|---|
SQLiteDatabase! |
The contents of a newly created database with the given name. |
Exceptions | |
---|---|
android.database.sqlite.SQLiteException |
if the database file could not be opened. |
peekWallpaper
open funpeekWallpaper(): Drawable!
Deprecated: Deprecated in Java.
registerComponentCallbacks
open fun registerComponentCallbacks(callback: ComponentCallbacks!): Unit
Add a new ComponentCallbacks
to the base application of the Context, which will be called at the same times as the ComponentCallbacks methods of activities and other components are called. Note that you must be sure to use unregisterComponentCallbacks
when appropriate in the future; this will not be removed for you.
After Build.VERSION_CODES#TIRAMISU
, the ComponentCallbacks
will be registered to the base Context
, and can be only used after attachBaseContext(android.content.Context)
. Users can still call to getApplicationContext().registerComponentCallbacks(ComponentCallbacks)
to add ComponentCallbacks
to the base application.
Parameters | |
---|---|
callback |
ComponentCallbacks!: The interface to call. This can be either a ComponentCallbacks or ComponentCallbacks2 interface. |
Exceptions | |
---|---|
java.lang.IllegalStateException |
if this method calls before attachBaseContext(android.content.Context) |
registerDeviceIdChangeListener
open fun registerDeviceIdChangeListener(
executor: Executor,
listener: IntConsumer
): Unit
Adds a new device ID changed listener to the Context
, which will be called when the device association is changed by the system.
The callback can be called when an app is moved to a different device and the Context
is not explicitly associated with a specific device.
When an application receives a device id update callback, this Context is guaranteed to also have an updated display ID(if any) and Configuration
.
Parameters | |
---|---|
executor |
Executor: This value cannot be null . Callback and listener events are dispatched through this Executor , providing an easy way to control which thread is used. To dispatch events through the main thread of your application, you can use Context.getMainExecutor() . Otherwise, provide an Executor that dispatches to an appropriate thread. |
listener |
IntConsumer: This value cannot be null . |
registerReceiver
open fun registerReceiver(
receiver: BroadcastReceiver?,
filter: IntentFilter!
): Intent?
Register a 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 has 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.
As of android.os.Build.VERSION_CODES#UPSIDE_DOWN_CAKE
, the system can place context-registered broadcasts in a queue while the app is in the cached state. When the app leaves the cached state, such as returning to the foreground, the system delivers any queued broadcasts. Multiple instances of certain broadcasts might be merged into one broadcast.
As of android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH
, receivers registered with this method will correctly respect the Intent#setPackage(String)
specified for an Intent being broadcast. Prior to that, it would be ignored and delivered to all matching registered receivers. Be careful if using this for security.
For apps targeting android.os.Build.VERSION_CODES#UPSIDE_DOWN_CAKE
, either RECEIVER_EXPORTED
or RECEIVER_NOT_EXPORTED
must be specified if the receiver is not being registered for system broadcasts or a SecurityException
will be thrown. See registerReceiver(android.content.BroadcastReceiver,android.content.IntentFilter,int)
to register a receiver with flags.
Note: this method cannot be called from a BroadcastReceiver
component; that is, from a BroadcastReceiver that is declared in an application's manifest. It is okay, however, to call this method from another BroadcastReceiver that has itself been registered at run time with #registerReceiver, since the lifetime of such a registered BroadcastReceiver is tied to the object that registered it.
Parameters | |
---|---|
receiver |
BroadcastReceiver?: This value may be null . |
filter |
IntentFilter!: Selects the Intent broadcasts to be received. |
Return | |
---|---|
Intent? |
The first sticky intent found that matches filter, or null if there are none. |
registerReceiver
open fun registerReceiver(
receiver: BroadcastReceiver?,
filter: IntentFilter!,
flags: Int
): Intent?
Register to receive intent broadcasts, with the receiver optionally being exposed to Instant Apps. See registerReceiver(android.content.BroadcastReceiver,android.content.IntentFilter)
for more information. By default Instant Apps cannot interact with receivers in other applications, this allows you to expose a receiver that Instant Apps can interact with.
See BroadcastReceiver
for more information on Intent broadcasts.
As of android.os.Build.VERSION_CODES#UPSIDE_DOWN_CAKE
, the system can place context-registered broadcasts in a queue while the app is in the cached state. When the app leaves the cached state, such as returning to the foreground, the system delivers any queued broadcasts. Multiple instances of certain broadcasts might be merged into one broadcast.
As of android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH
, receivers registered with this method will correctly respect the Intent#setPackage(String)
specified for an Intent being broadcast. Prior to that, it would be ignored and delivered to all matching registered receivers. Be careful if using this for security.
Parameters | |
---|---|
receiver |
BroadcastReceiver?: This value may be null . |
filter |
IntentFilter!: Selects the Intent broadcasts to be received. |
flags |
Int: Additional options for the receiver. For apps targeting android.os.Build.VERSION_CODES#UPSIDE_DOWN_CAKE either RECEIVER_EXPORTED or RECEIVER_NOT_EXPORTED must be specified if the receiver isn't being registered for system broadcasts or a SecurityException will be thrown. If RECEIVER_EXPORTED is specified, a receiver may additionally specify RECEIVER_VISIBLE_TO_INSTANT_APPS . For a complete list of system broadcast actions, see the BROADCAST_ACTIONS.TXT file in the Android SDK. If both RECEIVER_EXPORTED and RECEIVER_NOT_EXPORTED are specified, an IllegalArgumentException will be thrown. Value is either 0 or a combination of android.content.Context#RECEIVER_VISIBLE_TO_INSTANT_APPS , android.content.Context#RECEIVER_EXPORTED , android.content.Context#RECEIVER_NOT_EXPORTED , and android.content.Context.RECEIVER_EXPORTED_UNAUDITED |
Return | |
---|---|
Intent? |
The first sticky intent found that matches filter, or null if there are none. |
registerReceiver
open fun registerReceiver(
receiver: BroadcastReceiver?,
filter: IntentFilter!,
broadcastPermission: String?,
scheduler: Handler?
): Intent?
Register to receive intent broadcasts, to run in the context of scheduler. See registerReceiver(android.content.BroadcastReceiver,android.content.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.
As of android.os.Build.VERSION_CODES#UPSIDE_DOWN_CAKE
, the system can place context-registered broadcasts in a queue while the app is in the cached state. When the app leaves the cached state, such as returning to the foreground, the system delivers any queued broadcasts. Multiple instances of certain broadcasts might be merged into one broadcast.
As of android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH
, receivers registered with this method will correctly respect the Intent#setPackage(String)
specified for an Intent being broadcast. Prior to that, it would be ignored and delivered to all matching registered receivers. Be careful if using this for security.
For apps targeting android.os.Build.VERSION_CODES#UPSIDE_DOWN_CAKE
, either RECEIVER_EXPORTED
or RECEIVER_NOT_EXPORTED
must be specified if the receiver is not being registered for system broadcasts or a SecurityException
will be thrown. See registerReceiver(android.content.BroadcastReceiver,android.content.IntentFilter,java.lang.String,android.os.Handler,int)
to register a receiver with flags.
Parameters | |
---|---|
receiver |
BroadcastReceiver?: This value may be null . |
filter |
IntentFilter!: Selects the Intent broadcasts to be received. |
broadcastPermission |
String?: This value may be null . |
scheduler |
Handler?: This value may be null . |
Return | |
---|---|
Intent? |
The first sticky intent found that matches filter, or null if there are none. |
registerReceiver
open fun registerReceiver(
receiver: BroadcastReceiver?,
filter: IntentFilter!,
broadcastPermission: String?,
scheduler: Handler?,
flags: Int
): Intent?
Register to receive intent broadcasts, to run in the context of scheduler. See registerReceiver(android.content.BroadcastReceiver,android.content.IntentFilter,int)
and registerReceiver(android.content.BroadcastReceiver,android.content.IntentFilter,java.lang.String,android.os.Handler)
for more information.
See BroadcastReceiver
for more information on Intent broadcasts.
As of android.os.Build.VERSION_CODES#UPSIDE_DOWN_CAKE
, the system can place context-registered broadcasts in a queue while the app is in the cached state. When the app leaves the cached state, such as returning to the foreground, the system delivers any queued broadcasts. Multiple instances of certain broadcasts might be merged into one broadcast.
As of android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH
, receivers registered with this method will correctly respect the Intent#setPackage(String)
specified for an Intent being broadcast. Prior to that, it would be ignored and delivered to all matching registered receivers. Be careful if using this for security.
Parameters | |
---|---|
receiver |
BroadcastReceiver?: This value may be null . |
filter |
IntentFilter!: Selects the Intent broadcasts to be received. |
broadcastPermission |
String?: This value may be null . |
scheduler |
Handler?: This value may be null . |
flags |
Int: Additional options for the receiver. For apps targeting android.os.Build.VERSION_CODES#UPSIDE_DOWN_CAKE either RECEIVER_EXPORTED or RECEIVER_NOT_EXPORTED must be specified if the receiver isn't being registered for system broadcasts or a SecurityException will be thrown. If RECEIVER_EXPORTED is specified, a receiver may additionally specify RECEIVER_VISIBLE_TO_INSTANT_APPS . For a complete list of system broadcast actions, see the BROADCAST_ACTIONS.TXT file in the Android SDK. If both RECEIVER_EXPORTED and RECEIVER_NOT_EXPORTED are specified, an IllegalArgumentException will be thrown. Value is either 0 or a combination of android.content.Context#RECEIVER_VISIBLE_TO_INSTANT_APPS , android.content.Context#RECEIVER_EXPORTED , android.content.Context#RECEIVER_NOT_EXPORTED , and android.content.Context.RECEIVER_EXPORTED_UNAUDITED |
Return | |
---|---|
Intent? |
The first sticky intent found that matches filter, or null if there are none. |
removeStickyBroadcast
open funremoveStickyBroadcast(intent: Intent!): Unit
Deprecated: Deprecated in Java.
Parameters | |
---|---|
intent |
Intent!: The Intent that was previously broadcast. |
removeStickyBroadcastAsUser
open funremoveStickyBroadcastAsUser(
intent: Intent!,
user: UserHandle!
): Unit
Deprecated: Deprecated in Java.
Parameters | |
---|---|
intent |
Intent!: The Intent that was previously broadcast. |
user |
UserHandle!: UserHandle to remove the sticky broadcast from. |
revokeSelfPermissionsOnKill
open fun revokeSelfPermissionsOnKill(permissions: MutableCollection<String!>): Unit
Triggers the revocation of one or more permissions for the calling package. A package is only able to revoke runtime permissions. If a permission is not currently granted, it is ignored and will not get revoked (even if later granted by the user). Ultimately, you should never make assumptions about a permission status as users may grant or revoke them at any time.
Background permissions which have no corresponding foreground permission still granted once the revocation is effective will also be revoked.
The revocation happens asynchronously and kills all processes running in the calling UID. It will be triggered once it is safe to do so. In particular, it will not be triggered as long as the package remains in the foreground, or has any active manifest components (e.g. when another app is accessing a content provider in the package).
If you want to revoke the permissions right away, you could call System.exit()
in Handler.postDelayed
with a delay to allow completion of async IPC, But System.exit()
could affect other apps that are accessing your app at the moment. For example, apps accessing a content provider in your app will all crash.
Note that the settings UI shows a permission group as granted as long as at least one permission in the group is granted. If you want the user to observe the revocation in the settings, you should revoke every permission in the target group. To learn the current list of permissions in a group, you may use PackageManager#getGroupOfPlatformPermission(String, Executor, Consumer)
and PackageManager#getPlatformPermissionsForGroup(String, Executor, Consumer)
. This list of permissions may evolve over time, so it is recommended to check whether it contains any permission you wish to retain before trying to revoke an entire group.
Parameters | |
---|---|
permissions |
MutableCollection<String!>: This value cannot be null . |
Exceptions | |
---|---|
java.lang.IllegalArgumentException |
if any of the permissions is not a runtime permission |
revokeUriPermission
open fun revokeUriPermission(
uri: Uri!,
modeFlags: Int
): Unit
Parameters | |
---|---|
uri |
Uri!: The Uri you would like to revoke access to. |
modeFlags |
Int: The access modes to revoke. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
revokeUriPermission
open fun revokeUriPermission(
targetPackage: String!,
uri: Uri!,
modeFlags: Int
): Unit
Parameters | |
---|---|
toPackage |
The package you had previously granted access to. |
uri |
Uri!: The Uri you would like to revoke access to. |
modeFlags |
Int: The access modes to revoke. Value is either 0 or a combination of android.content.Intent#FLAG_GRANT_READ_URI_PERMISSION , and android.content.Intent#FLAG_GRANT_WRITE_URI_PERMISSION |
sendBroadcast
open fun sendBroadcast(intent: Intent!): Unit
Parameters | |
---|---|
intent |
Intent!: The Intent to broadcast; all receivers matching this Intent will receive the broadcast. |
sendBroadcast
open fun sendBroadcast(
intent: Intent!,
receiverPermission: String?
): Unit
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(android.content.Intent,java.lang.String)
.
See BroadcastReceiver
for more information on Intent broadcasts.
Parameters | |
---|---|
intent |
Intent!: The Intent to broadcast; all receivers matching this Intent will receive the broadcast. |
receiverPermission |
String?: This value may be null . |
sendBroadcast
open fun sendBroadcast(
intent: Intent,
receiverPermission: String?,
options: Bundle?
): Unit
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(android.content.Intent,java.lang.String)
.
See BroadcastReceiver
for more information on Intent broadcasts.
Parameters | |
---|---|
intent |
Intent: This value cannot be null . |
receiverPermission |
String?: This value may be null . |
options |
Bundle?: This value may be null . |
sendBroadcastAsUser
open fun sendBroadcastAsUser(
intent: Intent!,
user: UserHandle!
): Unit
Parameters | |
---|---|
intent |
Intent!: The intent to broadcast |
user |
UserHandle!: UserHandle to send the intent to. |
sendBroadcastAsUser
open fun sendBroadcastAsUser(
intent: Intent!,
user: UserHandle!,
receiverPermission: String?
): Unit
Parameters | |
---|---|
intent |
Intent!: The Intent to broadcast; all receivers matching this Intent will receive the broadcast. |
user |
UserHandle!: UserHandle to send the intent to. |
receiverPermission |
String?: (optional) String naming a permission that a receiver must hold in order to receive your broadcast. If null, no permission is required. |
sendOrderedBroadcast
open fun sendOrderedBroadcast(
intent: Intent!,
receiverPermission: String?
): Unit
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 |
Intent!: The Intent to broadcast; all receivers matching this Intent will receive the broadcast. |
receiverPermission |
String?: This value may be null . |
sendOrderedBroadcast
open fun sendOrderedBroadcast(
intent: Intent,
receiverPermission: String?,
options: Bundle?
): Unit
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 |
Intent: This value cannot be null . |
receiverPermission |
String?: This value may be null . |
options |
Bundle?: This value may be null . |
sendOrderedBroadcast
open fun sendOrderedBroadcast(
intent: Intent,
receiverPermission: String?,
resultReceiver: BroadcastReceiver?,
scheduler: Handler?,
initialCode: Int,
initialData: String?,
initialExtras: Bundle?
): Unit
Version of sendBroadcast(android.content.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
method will be called with the result values collected from the other receivers. The broadcast will be serialized in the same way as calling sendOrderedBroadcast(android.content.Intent,java.lang.String)
.
Like sendBroadcast(android.content.Intent)
, this method is asynchronous; it will return before resultReceiver.onReceive() is called.
See BroadcastReceiver
for more information on Intent broadcasts.
Parameters | |
---|---|
intent |
Intent: The Intent to broadcast; all receivers matching this Intent will receive the broadcast. This value cannot be null . |
receiverPermission |
String?: This value may be null . |
resultReceiver |
BroadcastReceiver?: This value may be null . |
scheduler |
Handler?: This value may be null . |
initialCode |
Int: An initial value for the result code. Often Activity.RESULT_OK. |
initialData |
String?: This value may be null . |
initialExtras |
Bundle?: This value may be null . |
sendOrderedBroadcast
open fun sendOrderedBroadcast(
intent: Intent,
receiverPermission: String?,
options: Bundle?,
resultReceiver: BroadcastReceiver?,
scheduler: Handler?,
initialCode: Int,
initialData: String?,
initialExtras: Bundle?
): Unit
Version of sendBroadcast(android.content.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
method will be called with the result values collected from the other receivers. The broadcast will be serialized in the same way as calling sendOrderedBroadcast(android.content.Intent,java.lang.String)
.
Like sendBroadcast(android.content.Intent)
, this method is asynchronous; it will return before resultReceiver.onReceive() is called.
See BroadcastReceiver
for more information on Intent broadcasts.
Parameters | |
---|---|
intent |
Intent: This value cannot be null . |
receiverPermission |
String?: This value may be null . |
options |
Bundle?: This value may be null . |
resultReceiver |
BroadcastReceiver?: This value may be null . |
scheduler |
Handler?: This value may be null . |
initialCode |
Int: An initial value for the result code. Often Activity.RESULT_OK. |
initialData |
String?: This value may be null . |
initialExtras |
Bundle?: This value may be null . |
sendOrderedBroadcast
open fun sendOrderedBroadcast(
intent: Intent,
receiverPermission: String?,
receiverAppOp: String?,
resultReceiver: BroadcastReceiver?,
scheduler: Handler?,
initialCode: Int,
initialData: String?,
initialExtras: Bundle?
): Unit
Version of sendOrderedBroadcast(android.content.Intent,java.lang.String,android.content.BroadcastReceiver,android.os.Handler,int,java.lang.String,android.os.Bundle)
that allows you to specify the App Op to enforce restrictions on which receivers the broadcast will be sent to.
See BroadcastReceiver
for more information on Intent broadcasts.
Parameters | |
---|---|
intent |
Intent: This value cannot be null . |
receiverPermission |
String?: This value may be null . |
receiverAppOp |
String?: This value may be null . |
resultReceiver |
BroadcastReceiver?: This value may be null . |
scheduler |
Handler?: This value may be null . |
initialCode |
Int: An initial value for the result code. Often Activity.RESULT_OK. |
initialData |
String?: This value may be null . |
initialExtras |
Bundle?: This value may be null . |
sendOrderedBroadcast
open fun sendOrderedBroadcast(
intent: Intent,
initialCode: Int,
receiverPermission: String?,
receiverAppOp: String?,
resultReceiver: BroadcastReceiver?,
scheduler: Handler?,
initialData: String?,
initialExtras: Bundle?,
options: Bundle?
): Unit
Parameters | |
---|---|
intent |
Intent: This value cannot be null . |
receiverPermission |
String?: This value may be null . |
receiverAppOp |
String?: This value may be null . |
resultReceiver |
BroadcastReceiver?: This value may be null . |
scheduler |
Handler?: This value may be null . |
initialData |
String?: This value may be null . |
initialExtras |
Bundle?: This value may be null . |
options |
Bundle?: This value may be null . |
sendOrderedBroadcastAsUser
open fun sendOrderedBroadcastAsUser(
intent: Intent!,
user: UserHandle!,
receiverPermission: String?,
resultReceiver: BroadcastReceiver?,
scheduler: Handler?,
initialCode: Int,
initialData: String?,
initialExtras: Bundle?
): Unit
Version of sendOrderedBroadcast(android.content.Intent,java.lang.String,android.content.BroadcastReceiver,android.os.Handler,int,java.lang.String,android.os.Bundle)
that allows you to specify the user the broadcast will be sent to. This is not available to applications that are not pre-installed on the system image.
See BroadcastReceiver
for more information on Intent broadcasts.
Requires android.Manifest.permission.INTERACT_ACROSS_USERS
Parameters | |
---|---|
intent |
Intent!: The Intent to broadcast; all receivers matching this Intent will receive the broadcast. |
user |
UserHandle!: UserHandle to send the intent to. |
receiverPermission |
String?: This value may be null . |
resultReceiver |
BroadcastReceiver?: This value may be null . |
scheduler |
Handler?: This value may be null . |
initialCode |
Int: An initial value for the result code. Often Activity.RESULT_OK. |
initialData |
String?: This value may be null . |
initialExtras |
Bundle?: This value may be null . |
sendStickyBroadcast
open funsendStickyBroadcast(intent: Intent!): Unit
Deprecated: Deprecated in Java.
Parameters | |
---|---|
intent |
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. |
sendStickyBroadcast
open funsendStickyBroadcast(
intent: Intent,
options: Bundle?
): Unit
Deprecated: Sticky broadcasts should not be used. They provide no security (anyone can access them), no protection (anyone can modify them), and many other problems. The recommended pattern is to use a non-sticky broadcast to report that something has changed, with another mechanism for apps to retrieve the current value whenever desired.
Perform a sendBroadcast(android.content.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(android.content.BroadcastReceiver,android.content.IntentFilter)
. In all other ways, this behaves the same as sendBroadcast(android.content.Intent)
.
Parameters | |
---|---|
intent |
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. This value cannot be null . |
options |
Bundle?: (optional) Additional sending options, generated from a android.app.BroadcastOptions . This value may be null . |
sendStickyBroadcastAsUser
open funsendStickyBroadcastAsUser(
intent: Intent!,
user: UserHandle!
): Unit
Deprecated: Deprecated in Java.
Parameters | |
---|---|
intent |
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. |
user |
UserHandle!: UserHandle to send the intent to. |
sendStickyOrderedBroadcast
open funsendStickyOrderedBroadcast(
intent: Intent!,
resultReceiver: BroadcastReceiver?,
scheduler: Handler?,
initialCode: Int,
initialData: String?,
initialExtras: Bundle?
): Unit
Deprecated: Deprecated in Java.
Version of #sendStickyBroadcast 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
method will be called with the result values collected from the other receivers. The broadcast will be serialized in the same way as calling sendOrderedBroadcast(android.content.Intent,java.lang.String)
.
Like sendBroadcast(android.content.Intent)
, this method is asynchronous; it will return before resultReceiver.onReceive() is called. Note that the sticky data stored is only the data you initially supply to the broadcast, not the result of any changes made by the receivers.
See BroadcastReceiver
for more information on Intent broadcasts.
Requires android.Manifest.permission#BROADCAST_STICKY
Parameters | |
---|---|
intent |
Intent!: The Intent to broadcast; all receivers matching this Intent will receive the broadcast. |
resultReceiver |
BroadcastReceiver?: This value may be null . |
scheduler |
Handler?: This value may be null . |
initialCode |
Int: An initial value for the result code. Often Activity.RESULT_OK. |
initialData |
String?: This value may be null . |
initialExtras |
Bundle?: This value may be null . |
sendStickyOrderedBroadcastAsUser
open funsendStickyOrderedBroadcastAsUser(
intent: Intent!,
user: UserHandle!,
resultReceiver: BroadcastReceiver?,
scheduler: Handler?,
initialCode: Int,
initialData: String?,
initialExtras: Bundle?
): Unit
Deprecated: Deprecated in Java.
Version of sendStickyOrderedBroadcast(android.content.Intent,android.content.BroadcastReceiver,android.os.Handler,int,java.lang.String,android.os.Bundle)
that allows you to specify the user the broadcast will be sent to. This is not available to applications that are not pre-installed on the system image.
See BroadcastReceiver
for more information on Intent broadcasts.
Requires android.Manifest.permission.INTERACT_ACROSS_USERS and android.Manifest.permission#BROADCAST_STICKY
Parameters | |
---|---|
intent |
Intent!: The Intent to broadcast; all receivers matching this Intent will receive the broadcast. |
user |
UserHandle!: UserHandle to send the intent to. |
resultReceiver |
BroadcastReceiver?: This value may be null . |
scheduler |
Handler?: This value may be null . |
initialCode |
Int: An initial value for the result code. Often Activity.RESULT_OK. |
initialData |
String?: This value may be null . |
initialExtras |
Bundle?: This value may be null . |
setTheme
open fun setTheme(resid: Int): Unit
Parameters | |
---|---|
resid |
Int: The style resource describing the theme. |
setWallpaper
open funsetWallpaper(bitmap: Bitmap!): Unit
Deprecated: Deprecated in Java.
setWallpaper
open funsetWallpaper(data: InputStream!): Unit
Deprecated: Deprecated in Java.
startActivities
open fun startActivities(intents: Array<Intent!>!): Unit
Parameters | |
---|---|
intents |
Array<Intent!>!: An array of Intents to be started. |
Exceptions | |
---|---|
android.content.ActivityNotFoundException |
startActivities
open fun startActivities(
intents: Array<Intent!>!,
options: Bundle?
): Unit
Launch multiple new activities. This is generally the same as calling startActivity(android.content.Intent)
for the first Intent in the array, that activity during its creation calling startActivity(android.content.Intent)
for the second entry, etc. Note that unlike that approach, generally none of the activities except the last in the array will be created at this point, but rather will be created when the user first visits them (due to pressing back from the activity on top).
This method throws ActivityNotFoundException
if there was no Activity found for any given Intent. In this case the state of the activity stack is undefined (some Intents in the list may be on it, some not), so you probably want to avoid such situations.
Parameters | |
---|---|
intents |
Array<Intent!>!: An array of Intents to be started. |
options |
Bundle?: This value may be null . |
Exceptions | |
---|---|
android.content.ActivityNotFoundException |
startActivity
open fun startActivity(intent: Intent!): Unit
Parameters | |
---|---|
intent |
Intent!: The description of the activity to start. |
Exceptions | |
---|---|
android.content.ActivityNotFoundException |
` |
startActivity
open fun startActivity(
intent: Intent!,
options: Bundle?
): Unit
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 android.app.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 |
Intent!: The description of the activity to start. |
options |
Bundle?: This value may be null . |
Exceptions | |
---|---|
android.content.ActivityNotFoundException |
startForegroundService
open fun startForegroundService(service: Intent!): ComponentName?
Similar to startService(android.content.Intent)
, but with an implicit promise that the Service will call startForeground(int, android.app.Notification)
once it begins running. The service is given an amount of time comparable to the ANR interval to do this, otherwise the system will automatically crash the process, in which case an internal exception ForegroundServiceDidNotStartInTimeException
is logged on logcat on devices running SDK Version android.os.Build.VERSION_CODES#S
or later. On older Android versions, an internal exception RemoteServiceException
is logged instead, with a corresponding message.
Unlike the ordinary startService(android.content.Intent)
, this method can be used at any time, regardless of whether the app hosting the service is in a foreground state.
Note: Beginning with SDK Version android.os.Build.VERSION_CODES#S
, apps targeting SDK Version android.os.Build.VERSION_CODES#S
or higher are not allowed to start foreground services from the background. See Behavior changes: Apps targeting Android 12 for more details.
Parameters | |
---|---|
service |
Intent!: Identifies the service to be started. The Intent must be fully explicit (supplying a component name). Additional values may be included in the Intent extras to supply arguments along with this specific start call. |
Return | |
---|---|
ComponentName? |
This value may be null . |
Exceptions | |
---|---|
java.lang.SecurityException |
If the caller does not have permission to access the service or the service can not be found. |
android.app.ForegroundServiceStartNotAllowedException |
If the caller app's targeting API is android.os.Build.VERSION_CODES#S or later, and the foreground service is restricted from start due to background restriction. |
startInstrumentation
open fun startInstrumentation(
className: ComponentName,
profileFile: String?,
arguments: Bundle?
): Boolean
Start executing an android.app.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 |
ComponentName: Name of the Instrumentation component to be run. This value cannot be null . |
profileFile |
String?: This value may be null . |
arguments |
Bundle?: This value may be null . |
Return | |
---|---|
Boolean |
true if the instrumentation was successfully started, else false if it could not be found. |
startIntentSender
open fun startIntentSender(
intent: IntentSender!,
fillInIntent: Intent?,
flagsMask: Int,
flagsValues: Int,
extraFlags: Int
): Unit
Same as startIntentSender(android.content.IntentSender,android.content.Intent,int,int,int,android.os.Bundle)
with no options specified.
startIntentSender
open fun startIntentSender(
intent: IntentSender!,
fillInIntent: Intent?,
flagsMask: Int,
flagsValues: Int,
extraFlags: Int,
options: Bundle?
): Unit
Like startActivity(android.content.Intent,android.os.Bundle)
, but taking a IntentSender to start. If the IntentSender is for an activity, that activity will be started as if you had called the regular startActivity(android.content.Intent)
here; otherwise, its associated action will be executed (such as sending a broadcast) as if you had called android.content.IntentSender#sendIntent on it.
startService
open fun startService(service: Intent!): ComponentName?
Request that a given application service be started. The Intent should either contain the complete class name of a specific service implementation to start, or a specific package name to target. If the Intent is less specified, it logs a warning about this. In this case any of the multiple matching services may be used. 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 android.app.Service#onStartCommand
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: it requires the service to remain running until stopService
is called, regardless of whether any clients are connected to it. Note that calls to startService() do not nest: no matter how many times you call startService(), a single call to stopService
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.
Note: Each call to startService() results in significant work done by the system to manage service lifecycle surrounding the processing of the intent, which can take multiple milliseconds of CPU time. Due to this cost, startService() should not be used for frequent intent delivery to a service, and only for scheduling significant work. Use #bindService for high frequency calls.
Beginning with SDK Versionandroid.os.Build.VERSION_CODES#O
, apps targeting SDK Version android.os.Build.VERSION_CODES#O
or higher are not allowed to start background services from the background. See Background Execution Limits for more details.
Note: Beginning with SDK Version android.os.Build.VERSION_CODES#S
, apps targeting SDK Version android.os.Build.VERSION_CODES#S
or higher are not allowed to start foreground services from the background. See Behavior changes: Apps targeting Android 12 for more details.
Parameters | |
---|---|
service |
Intent!: Identifies the service to be started. The Intent must be fully explicit (supplying a component name). Additional values may be included in the Intent extras to supply arguments along with this specific start call. |
Return | |
---|---|
ComponentName? |
This value may be null . |
Exceptions | |
---|---|
java.lang.SecurityException |
If the caller does not have permission to access the service or the service can not be found. |
java.lang.IllegalStateException |
Before Android android.os.Build.VERSION_CODES#S , if the application is in a state where the service can not be started (such as not in the foreground in a state when services are allowed), IllegalStateException was thrown. |
android.app.BackgroundServiceStartNotAllowedException |
On Android android.os.Build.VERSION_CODES#S and later, if the application is in a state where the service can not be started (such as not in the foreground in a state when services are allowed), android.app.BackgroundServiceStartNotAllowedException is thrown. This exception extends IllegalStateException , so apps can use catch (IllegalStateException) to catch both. |
stopService
open fun stopService(name: Intent!): Boolean
Parameters | |
---|---|
service |
Description of the service to be stopped. The Intent must be either fully explicit (supplying a component name) or specify a specific package name it is targeted to. |
Return | |
---|---|
Boolean |
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. |
Exceptions | |
---|---|
java.lang.SecurityException |
If the caller does not have permission to access the service or the service can not be found. |
java.lang.IllegalStateException |
If the application is in a state where the service can not be started (such as not in the foreground in a state when services are allowed). |
unbindService
open fun unbindService(conn: ServiceConnection): Unit
Parameters | |
---|---|
conn |
ServiceConnection: The connection interface previously supplied to bindService(). This parameter must not be null. |
unregisterComponentCallbacks
open fun unregisterComponentCallbacks(callback: ComponentCallbacks!): Unit
Remove a ComponentCallbacks
object that was previously registered with registerComponentCallbacks(android.content.ComponentCallbacks)
.
After Build.VERSION_CODES#TIRAMISU
, the ComponentCallbacks
will be unregistered to the base Context
, and can be only used after attachBaseContext(android.content.Context)
Parameters | |
---|---|
callback |
ComponentCallbacks!: The interface to call. This can be either a ComponentCallbacks or ComponentCallbacks2 interface. |
Exceptions | |
---|---|
java.lang.IllegalStateException |
if this method calls before attachBaseContext(android.content.Context) |
unregisterDeviceIdChangeListener
open fun unregisterDeviceIdChangeListener(listener: IntConsumer): Unit
Removes a device ID changed listener from the Context. It's a no-op if the listener is not already registered.
Parameters | |
---|---|
listener |
IntConsumer: This value cannot be null . |
unregisterReceiver
open fun unregisterReceiver(receiver: BroadcastReceiver!): Unit
Parameters | |
---|---|
receiver |
BroadcastReceiver!: The BroadcastReceiver to unregister. |
Exceptions | |
---|---|
java.lang.IllegalArgumentException |
if the receiver was not previously registered or already unregistered. |
updateServiceGroup
open fun updateServiceGroup(
conn: ServiceConnection,
group: Int,
importance: Int
): Unit
Parameters | |
---|---|
conn |
ServiceConnection: The connection interface previously supplied to bindService(). This parameter must not be null. |
group |
Int: A group to put this connection's process in. Upon calling here, this will override any previous group that was set for that process. The group tells the system about processes that are logically grouped together, so should be managed as one unit of importance (such as when being considered a recently used app). All processes in the same app with the same group are considered to be related. Supplying 0 reverts to the default behavior of not grouping. |
importance |
Int: Additional importance of the processes within a group. Upon calling here, this will override any previous importance that was set for that process. The most important process is 0, and higher values are successively less important. You can view this as describing how to order the processes in an array, with the processes at the end of the array being the least important. This value has no meaning besides indicating how processes should be ordered in that array one after the other. This provides a way to fine-tune the system's process killing, guiding it to kill processes at the end of the array first. |
Protected methods
attachBaseContext
protected open fun attachBaseContext(base: Context!): Unit
Set the base context for this ContextWrapper. All calls will then be delegated to the base context. Throws IllegalStateException if a base context has already been set.
Parameters | |
---|---|
base |
Context!: The new base context for this wrapper. |