ViewHolder模式

来源：互联网发布：64位版本的windows 编辑：程序博客网时间：2024/06/05 10:09

@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
[mw_shl_code=java,true]@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;
}[/mw_shl_code]

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