ViewHolder简洁写法,避免适配器中重复定义ViewHolder,减少代码量

import android.util.SparseArray;
import android.view.View;

@SuppressWarnings({ "unchecked" })
public class ViewFindUtils
{
/**
* ViewHolder简洁写法,避免适配器中重复定义ViewHolder,减少代码量 用法:
*
* <pre>
* if (convertView == null)
* {
*  convertView = View.inflate(context, R.layout.ad_demo, null);
* }
* TextView tv_demo = ViewHolderUtils.get(convertView, R.id.tv_demo);
* ImageView iv_demo = ViewHolderUtils.get(convertView, R.id.iv_demo);
* </pre>
*/
public static <T extends View> T hold(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;
}

/**
* 替代findviewById方法
*/
public static <T extends View> T find(View view, int id)
{
return (T) view.findViewById(id);
}
}