MediaSessionService

Artifact: androidx.media2:media2-session

Added in 1.0.0

Deprecated in 1.3.0

Kotlin |Java

public abstract class MediaSessionService extends Service

java.lang.Object
↳	android.content.Context
	↳	android.content.ContextWrapper
		↳	android.app.Service
			↳	androidx.media2.session.MediaSessionService

Known direct subclasses

MediaLibraryService

MediaLibraryService

This class is deprecated.

androidx.media2 is deprecated.

Base class for media session services, which is the service containing MediaSession.

It's highly recommended for an app to use this if it wants to keep media playback in the background.

Here are the benefits of using MediaSessionService.

Another app can know that your app supports MediaSession even when your app isn't running.
Another app can start playback of your app even when your app isn't running.

For example, user's voice command can start playback of your app even when it's not running.

To extend this class, adding followings directly to your AndroidManifest.xml.

<service android:name="component_name_of_your_implementation" >
  <intent-filter>
    <action android:name="androidx.media2.session.MediaSessionService" />
  </intent-filter>
</service>

You may also declare

android.media.browse.MediaBrowserService

for compatibility with android.support.v4.media.MediaBrowserCompat. This service can handle it automatically.

It's recommended for an app to have a single MediaSessionService declared in the manifest. Otherwise, your app might be shown twice in the list of the Auto/Wearable, or another app fails to pick the right session service when it wants to start the playback of this app. If you want to provide multiple sessions here, take a look at Supporting Multiple Sessions.

Topics covered here:

Service Lifecycle
Permissions
Supporting Multiple Sessions

Generally speaking, multiple sessions aren't necessary for most media apps. One exception is if your app can play multiple media content at the same time, but only for the playback of video-only media or remote playback, since recommends not playing multiple audio content at the same time. Also keep in mind that multiple media sessions would make Android Auto and Bluetooth device with display to show your apps multiple times, because they list up media sessions, not media apps.

Summary

Nested types
`public class MediaSessionService.MediaNotification` This class is deprecated. androidx.media2 is deprecated.

Nested types

public class MediaSessionService.MediaNotification

This class is deprecated.

androidx.media2 is deprecated.

Constants
`static final String`	`SERVICE_INTERFACE = "androidx.media2.session.MediaSessionService"` The `Intent` that must be declared as handled by the service.

Public constructors
`MediaSessionService()`

Public methods
`final void`	`addSession(@NonNull MediaSession session)` Adds a session to this service.
`final @NonNull List<MediaSession>`	`getSessions()` Gets the list of `MediaSession`s that you've added to this service via `addSession` or `onGetSession`.
`@Nullable IBinder`	`@CallSuper onBind(@NonNull Intent intent)` Default implementation for `MediaSessionService` to handle incoming binding request.
`void`	`@CallSuper onCreate()` Called by the system when the service is first created.
`void`	`@CallSuper onDestroy()` Called by the system to notify that it is no longer used and is being removed.
`abstract @Nullable MediaSession`	`onGetSession(@NonNull MediaSession.ControllerInfo controllerInfo)` Called when a `MediaController` is created with the this service's `SessionToken`.
`int`	`@CallSuper onStartCommand(Intent intent, int flags, int startId)`
`@Nullable MediaSessionService.MediaNotification`	`onUpdateNotification(@NonNull MediaSession session)` Called when notification UI needs update.
`final void`	`removeSession(@NonNull MediaSession session)` Removes a session from this service.

Inherited Constants

From android.content.ComponentCallbacks2

`static final int`	`TRIM_MEMORY_BACKGROUND = 40`
`static final int`	`TRIM_MEMORY_COMPLETE = 80`
`static final int`	`TRIM_MEMORY_MODERATE = 60`
`static final int`	`TRIM_MEMORY_RUNNING_CRITICAL = 15`
`static final int`	`TRIM_MEMORY_RUNNING_LOW = 10`
`static final int`	`TRIM_MEMORY_RUNNING_MODERATE = 5`
`static final int`	`TRIM_MEMORY_UI_HIDDEN = 20`

From android.content.Context

`static final String`	`ACCESSIBILITY_SERVICE = "accessibility"`
`static final String`	`ACCOUNT_SERVICE = "account"`
`static final String`	`ACTIVITY_SERVICE = "activity"`
`static final String`	`ALARM_SERVICE = "alarm"`
`static final String`	`APPWIDGET_SERVICE = "appwidget"`
`static final String`	`APP_OPS_SERVICE = "appops"`
`static final String`	`APP_SEARCH_SERVICE = "app_search"`
`static final String`	`AUDIO_SERVICE = "audio"`
`static final String`	`BATTERY_SERVICE = "batterymanager"`
`static final int`	`BIND_ABOVE_CLIENT = 8`
`static final int`	`BIND_ADJUST_WITH_ACTIVITY = 128`
`static final int`	`BIND_ALLOW_ACTIVITY_STARTS = 512`
`static final int`	`BIND_ALLOW_OOM_MANAGEMENT = 16`
`static final int`	`BIND_AUTO_CREATE = 1`
`static final int`	`BIND_DEBUG_UNBIND = 2`
`static final int`	`BIND_EXTERNAL_SERVICE = -2147483648`
`static final long`	`BIND_EXTERNAL_SERVICE_LONG = 4611686018427387904`
`static final int`	`BIND_IMPORTANT = 64`
`static final int`	`BIND_INCLUDE_CAPABILITIES = 4096`
`static final int`	`BIND_NOT_FOREGROUND = 4`
`static final int`	`BIND_NOT_PERCEPTIBLE = 256`
`static final int`	`BIND_SHARED_ISOLATED_PROCESS = 8192`
`static final int`	`BIND_WAIVE_PRIORITY = 32`
`static final String`	`BIOMETRIC_SERVICE = "biometric"`
`static final String`	`BLOB_STORE_SERVICE = "blob_store"`
`static final String`	`BLUETOOTH_SERVICE = "bluetooth"`
`static final String`	`BUGREPORT_SERVICE = "bugreport"`
`static final String`	`CAMERA_SERVICE = "camera"`
`static final String`	`CAPTIONING_SERVICE = "captioning"`
`static final String`	`CARRIER_CONFIG_SERVICE = "carrier_config"`
`static final String`	`CLIPBOARD_SERVICE = "clipboard"`
`static final String`	`COMPANION_DEVICE_SERVICE = "companiondevice"`
`static final String`	`CONNECTIVITY_DIAGNOSTICS_SERVICE = "connectivity_diagnostics"`
`static final String`	`CONNECTIVITY_SERVICE = "connectivity"`
`static final String`	`CONSUMER_IR_SERVICE = "consumer_ir"`
`static final int`	`CONTEXT_IGNORE_SECURITY = 2`
`static final int`	`CONTEXT_INCLUDE_CODE = 1`
`static final int`	`CONTEXT_RESTRICTED = 4`
`static final String`	`CREDENTIAL_SERVICE = "credential"`
`static final String`	`CROSS_PROFILE_APPS_SERVICE = "crossprofileapps"`
`static final int`	`DEVICE_ID_DEFAULT = 0`
`static final int`	`DEVICE_ID_INVALID = -1`
`static final String`	`DEVICE_LOCK_SERVICE = "device_lock"`
`static final String`	`DEVICE_POLICY_SERVICE = "device_policy"`
`static final String`	`DISPLAY_HASH_SERVICE = "display_hash"`
`static final String`	`DISPLAY_SERVICE = "display"`
`static final String`	`DOMAIN_VERIFICATION_SERVICE = "domain_verification"`
`static final String`	`DOWNLOAD_SERVICE = "download"`
`static final String`	`DROPBOX_SERVICE = "dropbox"`
`static final String`	`EUICC_SERVICE = "euicc"`
`static final String`	`FILE_INTEGRITY_SERVICE = "file_integrity"`
`static final String`	`FINGERPRINT_SERVICE = "fingerprint"`
`static final String`	`GAME_SERVICE = "game"`
`static final String`	`GRAMMATICAL_INFLECTION_SERVICE = "grammatical_inflection"`
`static final String`	`HARDWARE_PROPERTIES_SERVICE = "hardware_properties"`
`static final String`	`HEALTHCONNECT_SERVICE = "healthconnect"`
`static final String`	`INPUT_METHOD_SERVICE = "input_method"`
`static final String`	`INPUT_SERVICE = "input"`
`static final String`	`IPSEC_SERVICE = "ipsec"`
`static final String`	`JOB_SCHEDULER_SERVICE = "jobscheduler"`
`static final String`	`KEYGUARD_SERVICE = "keyguard"`
`static final String`	`LAUNCHER_APPS_SERVICE = "launcherapps"`
`static final String`	`LAYOUT_INFLATER_SERVICE = "layout_inflater"`
`static final String`	`LOCALE_SERVICE = "locale"`
`static final String`	`LOCATION_SERVICE = "location"`
`static final String`	`MEDIA_COMMUNICATION_SERVICE = "media_communication"`
`static final String`	`MEDIA_METRICS_SERVICE = "media_metrics"`
`static final String`	`MEDIA_PROJECTION_SERVICE = "media_projection"`
`static final String`	`MEDIA_ROUTER_SERVICE = "media_router"`
`static final String`	`MEDIA_SESSION_SERVICE = "media_session"`
`static final String`	`MIDI_SERVICE = "midi"`
`static final int`	`MODE_APPEND = 32768`
`static final int`	`MODE_ENABLE_WRITE_AHEAD_LOGGING = 8`
`static final int`	`MODE_MULTI_PROCESS = 4` This field is deprecated.
`static final int`	`MODE_NO_LOCALIZED_COLLATORS = 16`
`static final int`	`MODE_PRIVATE = 0`
`static final int`	`MODE_WORLD_READABLE = 1` This field is deprecated.
`static final int`	`MODE_WORLD_WRITEABLE = 2` This field is deprecated.
`static final String`	`NETWORK_STATS_SERVICE = "netstats"`
`static final String`	`NFC_SERVICE = "nfc"`
`static final String`	`NOTIFICATION_SERVICE = "notification"`
`static final String`	`NSD_SERVICE = "servicediscovery"`
`static final String`	`OVERLAY_SERVICE = "overlay"`
`static final String`	`PEOPLE_SERVICE = "people"`
`static final String`	`PERFORMANCE_HINT_SERVICE = "performance_hint"`
`static final String`	`POWER_SERVICE = "power"`
`static final String`	`PRINT_SERVICE = "print"`
`static final int`	`RECEIVER_EXPORTED = 2`
`static final int`	`RECEIVER_NOT_EXPORTED = 4`
`static final int`	`RECEIVER_VISIBLE_TO_INSTANT_APPS = 1`
`static final String`	`RESTRICTIONS_SERVICE = "restrictions"`
`static final String`	`ROLE_SERVICE = "role"`
`static final String`	`SEARCH_SERVICE = "search"`
`static final String`	`SENSOR_SERVICE = "sensor"`
`static final String`	`SHORTCUT_SERVICE = "shortcut"`
`static final String`	`STATUS_BAR_SERVICE = "statusbar"`
`static final String`	`STORAGE_SERVICE = "storage"`
`static final String`	`STORAGE_STATS_SERVICE = "storagestats"`
`static final String`	`SYSTEM_HEALTH_SERVICE = "systemhealth"`
`static final String`	`TELECOM_SERVICE = "telecom"`
`static final String`	`TELEPHONY_IMS_SERVICE = "telephony_ims"`
`static final String`	`TELEPHONY_SERVICE = "phone"`
`static final String`	`TELEPHONY_SUBSCRIPTION_SERVICE = "telephony_subscription_service"`
`static final String`	`TEXT_CLASSIFICATION_SERVICE = "textclassification"`
`static final String`	`TEXT_SERVICES_MANAGER_SERVICE = "textservices"`
`static final String`	`TV_INPUT_SERVICE = "tv_input"`
`static final String`	`TV_INTERACTIVE_APP_SERVICE = "tv_interactive_app"`
`static final String`	`UI_MODE_SERVICE = "uimode"`
`static final String`	`USAGE_STATS_SERVICE = "usagestats"`
`static final String`	`USB_SERVICE = "usb"`
`static final String`	`USER_SERVICE = "user"`
`static final String`	`VIBRATOR_MANAGER_SERVICE = "vibrator_manager"`
`static final String`	`VIBRATOR_SERVICE = "vibrator"` This field is deprecated.
`static final String`	`VIRTUAL_DEVICE_SERVICE = "virtualdevice"`
`static final String`	`VPN_MANAGEMENT_SERVICE = "vpn_management"`
`static final String`	`WALLPAPER_SERVICE = "wallpaper"`
`static final String`	`WIFI_AWARE_SERVICE = "wifiaware"`
`static final String`	`WIFI_P2P_SERVICE = "wifip2p"`
`static final String`	`WIFI_RTT_RANGING_SERVICE = "wifirtt"`
`static final String`	`WIFI_SERVICE = "wifi"`
`static final String`	`WINDOW_SERVICE = "window"`

From android.app.Service

`static final int`	`START_CONTINUATION_MASK = 15`
`static final int`	`START_FLAG_REDELIVERY = 1`
`static final int`	`START_FLAG_RETRY = 2`
`static final int`	`START_NOT_STICKY = 2`
`static final int`	`START_REDELIVER_INTENT = 3`
`static final int`	`START_STICKY = 1`
`static final int`	`START_STICKY_COMPATIBILITY = 0`
`static final int`	`STOP_FOREGROUND_DETACH = 2`
`static final int`	`STOP_FOREGROUND_LEGACY = 0` This field is deprecated.
`static final int`	`STOP_FOREGROUND_REMOVE = 1`

Inherited methods

From android.content.Context

`final int`	`getColor(int id)`
`final ColorStateList`	`getColorStateList(int id)`
`final Drawable`	`getDrawable(int id)`
`final String`	`getString(int resId)`
`final T`	`<T> getSystemService(Class<T> serviceClass)`
`final CharSequence`	`getText(int resId)`
`final TypedArray`	`obtainStyledAttributes(int[] attrs)`
`void`	`revokeSelfPermissionOnKill(String permName)`
`void`	`sendBroadcastWithMultiplePermissions( Intent intent, String[] receiverPermissions )`

From android.content.ContextWrapper

`boolean`	`bindIsolatedService( Intent service, int flags, String instanceName, Executor executor, ServiceConnection conn )`
`boolean`	`bindService(Intent service, ServiceConnection conn, int flags)`
`boolean`	`bindServiceAsUser( Intent service, ServiceConnection conn, int flags, UserHandle user )`
`int`	`checkCallingOrSelfPermission(String permission)`
`int`	`checkCallingOrSelfUriPermission(Uri uri, int modeFlags)`
`int[]`	`checkCallingOrSelfUriPermissions(List<Uri> uris, int modeFlags)`
`int`	`checkCallingPermission(String permission)`
`int`	`checkCallingUriPermission(Uri uri, int modeFlags)`
`int[]`	`checkCallingUriPermissions(List<Uri> uris, int modeFlags)`
`int`	`checkPermission(String permission, int pid, int uid)`
`int`	`checkSelfPermission(String permission)`
`int`	`checkUriPermission(Uri uri, int pid, int uid, int modeFlags)`
`int[]`	`checkUriPermissions(List<Uri> uris, int pid, int uid, int modeFlags)`
`void`	`clearWallpaper()` This method is deprecated.
`Context`	`createAttributionContext(String attributionTag)`
`Context`	`createConfigurationContext(Configuration overrideConfiguration)`
`Context`	`createContext(ContextParams contextParams)`
`Context`	`createContextForSplit(String splitName)`
`Context`	`createDeviceContext(int deviceId)`
`Context`	`createDeviceProtectedStorageContext()`
`Context`	`createDisplayContext(Display display)`
`Context`	`createPackageContext(String packageName, int flags)`
`Context`	`createWindowContext(int type, Bundle options)`
`String[]`	`databaseList()`
`boolean`	`deleteDatabase(String name)`
`boolean`	`deleteFile(String name)`
`boolean`	`deleteSharedPreferences(String name)`
`void`	`enforceCallingOrSelfPermission(String permission, String message)`
`void`	`enforceCallingOrSelfUriPermission( Uri uri, int modeFlags, String message )`
`void`	`enforceCallingPermission(String permission, String message)`
`void`	`enforceCallingUriPermission(Uri uri, int modeFlags, String message)`
`void`	`enforcePermission(String permission, int pid, int uid, String message)`
`void`	`enforceUriPermission( Uri uri, int pid, int uid, int modeFlags, String message )`
`String[]`	`fileList()`
`Context`	`getApplicationContext()`
`ApplicationInfo`	`getApplicationInfo()`
`AssetManager`	`getAssets()`
`AttributionSource`	`getAttributionSource()`
`String`	`getAttributionTag()`
`Context`	`getBaseContext()`
`File`	`getCacheDir()`
`ClassLoader`	`getClassLoader()`
`File`	`getCodeCacheDir()`
`ContentResolver`	`getContentResolver()`
`File`	`getDataDir()`
`File`	`getDatabasePath(String name)`
`int`	`getDeviceId()`
`File`	`getDir(String name, int mode)`
`Display`	`getDisplay()`
`File`	`getExternalCacheDir()`
`File[]`	`getExternalCacheDirs()`
`File`	`getExternalFilesDir(String type)`
`File[]`	`getExternalFilesDirs(String type)`
`File[]`	`getExternalMediaDirs()` This method is deprecated.
`File`	`getFileStreamPath(String name)`
`File`	`getFilesDir()`
`Executor`	`getMainExecutor()`
`Looper`	`getMainLooper()`
`File`	`getNoBackupFilesDir()`
`File`	`getObbDir()`
`File[]`	`getObbDirs()`
`String`	`getOpPackageName()`
`String`	`getPackageCodePath()`
`PackageManager`	`getPackageManager()`
`String`	`getPackageName()`
`String`	`getPackageResourcePath()`
`ContextParams`	`getParams()`
`Resources`	`getResources()`
`SharedPreferences`	`getSharedPreferences(String name, int mode)`
`Object`	`getSystemService(String name)`
`String`	`getSystemServiceName(Class<Object> serviceClass)`
`Resources.Theme`	`getTheme()`
`Drawable`	`getWallpaper()` This method is deprecated.
`int`	`getWallpaperDesiredMinimumHeight()` This method is deprecated.
`int`	`getWallpaperDesiredMinimumWidth()` This method is deprecated.
`void`	`grantUriPermission(String toPackage, Uri uri, int modeFlags)`
`boolean`	`isDeviceProtectedStorage()`
`boolean`	`isRestricted()`
`boolean`	`isUiContext()`
`boolean`	`moveDatabaseFrom(Context sourceContext, String name)`
`boolean`	`moveSharedPreferencesFrom(Context sourceContext, String name)`
`FileInputStream`	`openFileInput(String name)`
`FileOutputStream`	`openFileOutput(String name, int mode)`
`SQLiteDatabase`	`openOrCreateDatabase( String name, int mode, SQLiteDatabase.CursorFactory factory )`
`Drawable`	`peekWallpaper()` This method is deprecated.
`void`	`registerComponentCallbacks(ComponentCallbacks callback)`
`void`	`registerDeviceIdChangeListener(Executor executor, IntConsumer listener)`
`Intent`	`registerReceiver(BroadcastReceiver receiver, IntentFilter filter)`
`void`	`removeStickyBroadcast(Intent intent)` This method is deprecated.
`void`	`removeStickyBroadcastAsUser(Intent intent, UserHandle user)` This method is deprecated.
`void`	`revokeSelfPermissionsOnKill(Collection<String> permissions)`
`void`	`revokeUriPermission(Uri uri, int modeFlags)`
`void`	`sendBroadcast(Intent intent)`
`void`	`sendBroadcastAsUser(Intent intent, UserHandle user)`
`void`	`sendOrderedBroadcast(Intent intent, String receiverPermission)`
`void`	`sendOrderedBroadcastAsUser( Intent intent, UserHandle user, String receiverPermission, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras )`
`void`	`sendStickyBroadcast(Intent intent)` This method is deprecated.
`void`	`sendStickyBroadcastAsUser(Intent intent, UserHandle user)` This method is deprecated.
`void`	`sendStickyOrderedBroadcast( Intent intent, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras )` This method is deprecated.
`void`	`sendStickyOrderedBroadcastAsUser( Intent intent, UserHandle user, BroadcastReceiver resultReceiver, Handler scheduler, int initialCode, String initialData, Bundle initialExtras )` This method is deprecated.
`void`	`setTheme(int resid)`
`void`	`setWallpaper(Bitmap bitmap)` This method is deprecated.
`void`	`startActivities(Intent[] intents)`
`void`	`startActivity(Intent intent)`
`ComponentName`	`startForegroundService(Intent service)`
`boolean`	`startInstrumentation( ComponentName className, String profileFile, Bundle arguments )`
`void`	`startIntentSender( IntentSender intent, Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags )`
`ComponentName`	`startService(Intent service)`
`boolean`	`stopService(Intent name)`
`void`	`unbindService(ServiceConnection conn)`
`void`	`unregisterComponentCallbacks(ComponentCallbacks callback)`
`void`	`unregisterDeviceIdChangeListener(IntConsumer listener)`
`void`	`unregisterReceiver(BroadcastReceiver receiver)`
`void`	`updateServiceGroup(ServiceConnection conn, int group, int importance)`

From android.app.Service

`void`	`attachBaseContext(Context newBase)`
`void`	`dump(FileDescriptor fd, PrintWriter writer, String[] args)`
`final Application`	`getApplication()`
`final int`	`getForegroundServiceType()`
`void`	`onConfigurationChanged(Configuration newConfig)`
`void`	`onLowMemory()`
`void`	`onRebind(Intent intent)`
`void`	`onStart(Intent intent, int startId)` This method is deprecated.
`void`	`onTaskRemoved(Intent rootIntent)`
`void`	`onTimeout(int startId)`
`void`	`onTrimMemory(int level)`
`boolean`	`onUnbind(Intent intent)`
`final void`	`startForeground(int id, Notification notification)`
`final void`	`stopForeground(boolean removeNotification)` This method is deprecated.
`final void`	`stopSelf()`
`final boolean`	`stopSelfResult(int startId)`

Constants

SERVICE_INTERFACE

Added in 1.0.0

Deprecated in 1.3.0

public static final String SERVICE_INTERFACE = "androidx.media2.session.MediaSessionService"

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

Public constructors

MediaSessionService

Added in 1.0.0

Deprecated in 1.3.0

public MediaSessionService()

Public methods

addSession

Added in 1.0.0

Deprecated in 1.3.0

public final void addSession(@NonNull MediaSession session)

Adds a session to this service. This is not necessary for most media apps. See Supporting Multiple Sessions for detail.

Added session will be removed automatically when it's closed, or removed when removeSession is called.

Parameters
`@NonNull MediaSession session`	a session to be added.

See also
`removeSession`

getSessions

Added in 1.0.0

Deprecated in 1.3.0

public final @NonNull List<MediaSession> getSessions()

Gets the list of MediaSessions that you've added to this service via addSession or onGetSession.

Returns
`@NonNull List<MediaSession>`	sessions

onBind

Added in 1.0.0

Deprecated in 1.3.0

@CallSuper
public @Nullable IBinder onBind(@NonNull Intent intent)

Default implementation for MediaSessionService to handle incoming binding request. If the request is for getting the session, the intent will have action SERVICE_INTERFACE.

Override this method if this service also needs to handle binder requests other than SERVICE_INTERFACE. Derived classes MUST call through to the super class's implementation of this method.

Parameters
`@NonNull Intent intent`

Returns
`@Nullable IBinder`	Binder

onCreate

@CallSuper
public void onCreate()

Called by the system when the service is first created. Do not call this method directly.

Override this method if you need your own initialization. Derived classes MUST call through to the super class's implementation of this method.

onDestroy

@CallSuper
public void onDestroy()

Called by the system to notify that it is no longer used and is being removed. Do not call this method directly.

Override this method if you need your own clean up. Derived classes MUST call through to the super class's implementation of this method.

onGetSession

Added in 1.0.0

Deprecated in 1.3.0

public abstract @Nullable MediaSession onGetSession(@NonNull MediaSession.ControllerInfo controllerInfo)

Called when a MediaController is created with the this service's SessionToken. Return the session for telling the controller which session to connect. Return null to reject the connection from this controller.

Session service automatically maintains the returned session. In other words, session returned here will be added here and removed when the session is closed. You don't need to manually call addSession nor removeSession.

There are two special cases where the getPackageName returns non-existent package name:

When the service is being started through the media button intent, the method will return ACTION_MEDIA_BUTTON. If you want to allow the service being started by the media button events, do not return null.
When the legacy android.media.browse.MediaBrowser or android.support.v4.media.MediaBrowserCompat tries to connect, the method will return SERVICE_INTERFACE. If you want to allow the service being bound by the legacy media browsers, do not return null.

For those special cases, the values returned by getUid and getConnectionHints have no meaning.

This method is always called on the main thread.

Parameters
`@NonNull MediaSession.ControllerInfo controllerInfo`	information of the controller which is trying to connect

Returns
`@Nullable MediaSession`	a `MediaSession` instance for the controller to connect to, or `null` to reject connection

See also
`MediaSession.Builder`
`getSessions`

onStartCommand

@CallSuper
public int onStartCommand(Intent intent, int flags, int startId)

onUpdateNotification

Added in 1.0.0

Deprecated in 1.3.0

public @Nullable MediaSessionService.MediaNotification onUpdateNotification(@NonNull MediaSession session)

Called when notification UI needs update. Override this method to show or cancel your own notification UI.

This would be called on MediaSession's callback executor when player state is changed, or when the current media item of the session is changed.

With the notification returned here, the service becomes foreground service when the playback is started. Apps targeting API P or later must request the permission FOREGROUND_SERVICE in order to use this API. It becomes background service after the playback is stopped.

Parameters
`@NonNull MediaSession session`	a session that needs notification update

Returns
`@Nullable MediaSessionService.MediaNotification`	a `MediaNotification`. Can be `null`

removeSession

Added in 1.0.0

Deprecated in 1.3.0

public final void removeSession(@NonNull MediaSession session)

Removes a session from this service. This is not necessary for most media apps. See Supporting Multiple Sessions for detail.

Parameters
`@NonNull MediaSession session`	a session to be removed.

See also
`addSession`