How to use

supportsControlRequest

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);
  }
}

/**
 * Send the given intent to the current route. The result will be returned in the given
 * ResultBundleHandler. This function will also check to see if the current route can handle the
 * intent before sending it.
 *
 * @param intent the intent to send to the current route.
 * @param bundleHandler contains the result of sending the intent
 */
private void sendIntentToRoute(final Intent intent, final ResultBundleHandler bundleHandler) {
  if (getCurrentRoute() == null) {
    logIntent("sendIntentToRoute ", intent);
    Log.d(TAG, "The current route is null.");
    if (bundleHandler != null) bundleHandler.onError(null, null);
    return;
  }
  if (!getCurrentRoute().supportsControlRequest(intent)) {
    logIntent("sendIntentToRoute ", intent);
    Log.d(TAG, "The intent is not supported by the route: %s", getCurrentRoute());
    if (bundleHandler != null) bundleHandler.onError(null, null);
    return;
  }
  sendControlIntent(intent, bundleHandler);
}