@Override
        public void onScreenSwitched(final int screen) {
          // Check the appropriate button when the user swipes screens.
          switch (screen) {
            case 0:
              break;
            case 1:
              break;
          }

          if (allMedias.size() > 1) {
            handler.removeCallbacks(r);
            startTimer();
            pageIndicator.setSelectedPage(screen);
            MediaView prevMediaView = mediaViewList.get(prevPage);
            MediaView curMediaView = mediaViewList.get(screen);
            prevPage = screen;
            curMediaView.playVideo();
            prevMediaView.pauseVideo();
          }
        }