@Override
 public void onBackPressed() {
   if (JCVideoPlayer.backPress()) {
     return;
   }
   super.onBackPressed();
 }
 @Override
 protected void onPause() {
   super.onPause();
   JCVideoPlayer.releaseAllVideos();
 }
 @Override
 public void onScroll(
     AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
   JCVideoPlayer.onScroll();
 }