How to use

removeOnActiveSessionsChangedListener

method

in

android.media.session.MediaSessionManager

public synchronized void setRemoteControlListener(Listener listener) throws RemoteException {
  if (Log.isLoggable("NowPlayCardListener", 3)) {
    Log.d("NowPlayCardListener", "setRemoteControlListener: " + listener);
  }
  MediaSessionManager manager = (MediaSessionManager) this.mContext.getApplicationContext().getSystemService("media_session");
  if (listener != null) {
    manager.addOnActiveSessionsChangedListener(this, null);
    this.mNowPlayCardListener = listener;
    checkForMediaSession();
  } else {
    manager.removeOnActiveSessionsChangedListener(this);
    this.mNowPlayCardListener = null;
    updateMediaSessionCallback(null);
  }
}

/**
 * Disables RemoteController.
 */
public void setRemoteControllerDisabled() {
  Log.d(TAG, "setRemoteControllerDisabled");
  if (Build.VERSION.SDK_INT == Build.VERSION_CODES.KITKAT) {
    Object service = TomahawkApp.getContext().getSystemService(Context.AUDIO_SERVICE);
    if (service instanceof AudioManager
        && ((AudioManager) service).registerRemoteController(mRemoteController)) {
      ((AudioManager) service).unregisterRemoteController(mRemoteController);
    }
  } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    Object service =
        TomahawkApp.getContext().getSystemService(Context.MEDIA_SESSION_SERVICE);
    if (service instanceof MediaSessionManager) {
      MediaSessionManager manager = (MediaSessionManager) service;
      if (mSessionsChangedListener != null) {
        manager.removeOnActiveSessionsChangedListener(mSessionsChangedListener);
      }
      synchronized (this) {
        unregisterSessionCallbacks();
        mActiveSessions = new ArrayList<>();
      }
    }
  }
}