code: public void getHitSprites (List<Sprite> list, int x, int y)
      {
          for (int ii = _sprites.size() - 1; ii >= 0; ii--) {
              Sprite sprite = _sprites.get(ii);
              if (sprite.hitTest(x, y)) {
                  list.add(sprite);
              }
          }
      }
docs: When an animated view is determining what entity in its view is under the mouse pointer, it
  may require a list of sprites that are "hit" by a particular pixel. The sprites' bounds are
  first checked and sprites with bounds that contain the supplied point are further checked
  for a non-transparent at the specified location.
  
  @param list the list to fill with any intersecting sprites, the sprites with the highest
  render order provided first.
  @param x the x (screen) coordinate to be checked.
  @param y the y (screen) coordinate to be checked.