@Override
 public void start() {
   super.start();
   NativeBitmapFactory.loadLibs();
   if (mCacheManager == null) {
     mCacheManager = new CacheManager(mMaxCacheSize, MAX_CACHE_SCREEN_SIZE);
     mCacheManager.begin();
     mRenderer.setCacheManager(mCacheManager);
   } else {
     mCacheManager.resume();
   }
 }