Question

View里面的settag方法放的是Viewholder里面的属性吗

Answer 1

android：ListView：convertView.setTag()来设置数据

void android.view.View.setTag(Object tag)

public void setTag (Object tag)

Since: API Level 1

Sets the tag associated with this view. A tag can be used to mark a view in
its hierarchy and does not have to be unique within the hierarchy. Tags can also
be used to store data within a view without resorting to another data
structure.

Parameters

an Object to tag the view
with

also see

getTag()

setTag(int, Object)

public View getView(int position, View convertView, ViewGroup parent) {
final int cc = position;
ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.itemrow, null);
holder.tagcolor = (ImageView) convertView.findViewById(R.id.itemrowiamge);
holder.itemname = (TextView) convertView.findViewById(R.id.itemrowtext);
holder.cb = (CheckBox) convertView.findViewById(R.id.itemrowcb);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}

//获取ViewHolder中所填入的数据
holder.tagcolor.setBackgroundResource((Integer) itemList.get(position).get("IMG"));
holder.itemname.setText((String) itemList.get(position).get("ITEMNAME"));
holder.ckd = (String) itemList.get(position).get("CHECKED");

//单个项目中的CheckBox的按键监听函数
holder.cb.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
setC(cc);//当被按下后调用函数改变状态
}
});
if (holder.ckd.equals("t"))
holder.cb.setChecked(true);
else
holder.cb.setChecked(false);
return convertView;
}

设一个holder类

import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;

//ViewHolder类用以储存每一条项目所需的数据
public class ViewHolder {
public ImageView tagcolor;//单条项目中的图片
public TextView itemname;//单条项目中的文本
public CheckBox cb;//单条项目中的CheckBox
public String ckd;//单条项目中用以标识CheckBox状态的字符串变量
}

即可。