- ViewHolder holder = null;
- if(convertView == null){
- convertView = mInflater.inflate(R.layout.xxx null);
- holder = new ViewHolder();
- holder.tvXXX = (TextView)findViewById(R.id.xxx);
-
- }
- else{
- holder = (ViewHolder) convertView.getTag();
- }
-
-
-
- private static class ViewHolder{
- TextView tvXXX;
-
- }
这么写一次还行，但问题是总有很多很多的ViewAdapter要这么写，每次都repeat,repeat,repeat 累啊。 所以，有这么一种简洁的写法分享给大家，先声明，从国外网站上看的，不是自己原创的，但确实很喜欢这个简洁的设计。
ViewHolder这么写（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），代码很简单，看过就明白了
- public class ViewHolder {
-
- @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
- @Override
- public 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;
- }
android:ViewHolder模式
原文：http://www.cnblogs.com/zgqys1980/p/5110885.html
