ViewHolder最简洁写法，AbViewHolder

AbViewHolder源码：

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public class AbViewHolder {           /**      * ImageView view = AbViewHolder.get(convertView, R.id.imageView);      * @param view      * @param id      * @return      */     @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;     } }

在适配器中的应用，可以减少holder类的繁琐的定义，可以参照demo中的ImageListAdapter，

同时ImageGridAdapter的写法是原始的，可以比较使用：

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@Override public View getView(int position, View convertView, ViewGroup parent){       if(convertView == null){          //使用自定义的list_items作为Layout          convertView = mInflater.inflate(mResource, parent, false);       }               ImageView itemsIcon = AbViewHolder.get(convertView, mTo[0]);       TextView itemsTitle = AbViewHolder.get(convertView, mTo[1]);       TextView itemsText = AbViewHolder.get(convertView, mTo[2]);               //获取该行的数据       final Map<String, Object>  obj = (Map<String, Object>)mData.get(position);       String imageUrl = (String)obj.get("itemsIcon");       itemsTitle.setText((String)obj.get("itemsTitle"));       itemsText.setText((String)obj.get("itemsText"));       //设置加载中的View       mAbImageDownloader.setLoadingView(convertView.findViewById(R.id.progressBar));       //图片的下载       mAbImageDownloader.display(itemsIcon,imageUrl);       return convertView; }