How to use

sendControlRequest

method

in

android.support.v7.media.MediaRouter$RouteInfo

@Override
public void updateStatistics() {
  // clear stats info first
  mStatsInfo = "";
  Intent intent = new Intent(SampleMediaRouteProvider.ACTION_GET_STATISTICS);
  intent.addCategory(SampleMediaRouteProvider.CATEGORY_SAMPLE_ROUTE);
  if (mRoute != null && mRoute.supportsControlRequest(intent)) {
    ControlRequestCallback callback = new ControlRequestCallback() {
      @Override
      public void onResult(Bundle data) {
        if (DEBUG) {
          Log.d(TAG, "getStatistics: succeeded: data=" + data);
        }
        if (data != null) {
          int playbackCount = data.getInt(
              SampleMediaRouteProvider.DATA_PLAYBACK_COUNT, -1);
          mStatsInfo = "Total playback count: " + playbackCount;
        }
      }
      @Override
      public void onError(String error, Bundle data) {
        Log.d(TAG, "getStatistics: failed: error=" + error + ", data=" + data);
      }
    };
    mRoute.sendControlRequest(intent, callback);
  }
}

private void sendControlIntent(final Intent intent, final ResultBundleHandler bundleHandler) {
  Log.d(TAG, "Sending intent to %s %s", getCurrentRoute().getName(),
      getCurrentRoute().getId());
  logIntent("sendControlIntent ", intent);
  if (getCurrentRoute().isDefault()) {
    Log.d(TAG, "Route is default, not sending");
    return;
  }
  getCurrentRoute().sendControlRequest(intent, new MediaRouter.ControlRequestCallback() {
    @Override
    public void onResult(Bundle data) {
      if (data != null && bundleHandler != null) bundleHandler.onResult(data);
    }
    @Override
    public void onError(String message, Bundle data) {
      logControlRequestError(intent, message, data);
      int errorCode = 0;
      if (data != null) {
        errorCode = data.getInt(CastMediaControlIntent.EXTRA_ERROR_CODE);
      }
      sendErrorToListeners(errorCode);
      if (bundleHandler != null) bundleHandler.onError(message, data);
    }
  });
}