/**

	 * 用法： ImageView bananaView = ViewHolder.get(convertView, R.id.banana);

	 *

	 * @param convertView

	 * @param id

	 * @return

	 */

	@SuppressWarnings("unchecked")

	public static <T extends View> T getView(View convertView, int id) {

		SparseArray<View> viewHolder = (SparseArray<View>) convertView.getTag();

		if (viewHolder == null) {

			viewHolder = new SparseArray<View>();

			convertView.setTag(viewHolder);

		}

		View childView = viewHolder.get(id);

		if (childView == null) {

			childView = convertView.findViewById(id);

			viewHolder.put(id, childView);

		}

		return (T) childView;

	}