Android中ViewHolder模式超简洁写法（一劳永逸）

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只提供一个静态方法，其实可以加一个私有构造函数防止外部实例化

import android.util.SparseArray;import android.view.View;/** * File_name com.dy.logs.mp.utill.ViewHolder *  * @author linglongxin24 <br/> * @date create at 2014-6-11下午6:03:15 <br/> * @time update at 2014-6-11下午6:03:15 */public class ViewHolder {// I added a generic return type to reduce the casting noise in client code@SuppressWarnings("unchecked")public static <T extends View> T get(View view, int id) {SparseArray<View> viewHolder = (SparseArray<View>) view.getTag();if (viewHolder == null) {viewHolder = new SparseArray<View>();view.setTag(viewHolder);}View childView = viewHolder.get(id);if (childView == null) {childView = view.findViewById(id);viewHolder.put(id, childView);}return (T) childView;}}

在getView里这样

@Overridepublic View getView(int position, View convertView, ViewGroup parent) {    if (convertView == null) {        convertView = LayoutInflater.from(context)          .inflate(R.layout.banana_phone, parent, false);    }    ImageView bananaView = ViewHolder.get(convertView, R.id.banana);    TextView phoneView = ViewHolder.get(convertView, R.id.phone);    BananaPhone bananaPhone = getItem(position);    phoneView.setText(bananaPhone.getPhone());    bananaView.setImageResource(bananaPhone.getBanana());    return convertView;

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