MediaButtonReceiver

Kotlin |Java

open class MediaButtonReceiver : BroadcastReceiver

kotlin.Any
↳	android.content.BroadcastReceiver
	↳	androidx.media.session.MediaButtonReceiver

A media button receiver receives and helps translate hardware media playback buttons, such as those found on wired and wireless headsets, into the appropriate callbacks in your app.

You can add this MediaButtonReceiver to your app by adding it directly to your AndroidManifest.xml:

<receiver android:name="androidx.media.session.MediaButtonReceiver" >
    <intent-filter>
      <action android:name="android.intent.action.MEDIA_BUTTON" />
    </intent-filter>
  </receiver>

This class assumes you have a Service in your app that controls media playback via a MediaSessionCompat. Once a key event is received by MediaButtonReceiver, this class tries to find a Service that can handle Intent#ACTION_MEDIA_BUTTON, and a MediaBrowserServiceCompat in turn. If an appropriate service is found, this class forwards the key event to the service. If neither is available or more than one valid service/media browser service is found, an IllegalStateException will be thrown. Thus, your app should have one of the following services to get a key event properly.

Service Handling ACTION_MEDIA_BUTTON

A service can receive a key event by including an intent filter that handles Intent#ACTION_MEDIA_BUTTON:

<service android:name="com.example.android.MediaPlaybackService" >
    <intent-filter>
      <action android:name="android.intent.action.MEDIA_BUTTON" />
    </intent-filter>
  </service>

Events can then be handled in Service#onStartCommand(Intent, int, int) by calling MediaButtonReceiver#handleIntent(MediaSessionCompat, Intent), passing in your current MediaSessionCompat:

private MediaSessionCompat mMediaSessionCompat = ...;
 
  public int onStartCommand(Intent intent, int flags, int startId) {
    MediaButtonReceiver.handleIntent(mMediaSessionCompat, intent);
    return super.onStartCommand(intent, flags, startId);
  }

This ensures that the correct callbacks to MediaSessionCompat.Callback will be triggered based on the incoming KeyEvent.

Note: Once the service is started, it must start to run in the foreground.

MediaBrowserService

If you already have a MediaBrowserServiceCompat in your app, MediaButtonReceiver will deliver the received key events to the MediaBrowserServiceCompat by default. You can handle them in your MediaSessionCompat.Callback.

Summary

Public constructors
`<init>()` A media button receiver receives and helps translate hardware media playback buttons, such as those found on wired and wireless headsets, into the appropriate callbacks in your app.

Public methods
open static PendingIntent!	`buildMediaButtonPendingIntent(context: Context!, action: Long)` Creates a broadcast pending intent that will send a media button event.
open static PendingIntent!	`buildMediaButtonPendingIntent(context: Context!, mbrComponent: ComponentName!, action: Long)` Creates a broadcast pending intent that will send a media button event.
open static KeyEvent!	`handleIntent(mediaSessionCompat: MediaSessionCompat!, intent: Intent!)` Extracts any available `KeyEvent` from an `Intent#ACTION_MEDIA_BUTTON` intent, passing it onto the `MediaSessionCompat` using `MediaControllerCompat#dispatchMediaButtonEvent(KeyEvent)`, which in turn will trigger callbacks to the `MediaSessionCompat.Callback` registered via `MediaSessionCompat#setCallback(MediaSessionCompat.Callback)`.
open Unit	`onReceive(context: Context!, intent: Intent!)`

Public constructors

<init>

MediaButtonReceiver()