android:ListView:convertView.setTag()來設置數據


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();
            }
 
            //獲取ViewHolder中所填入的數據
            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");
 
            //單個項目中的CheckBox的按鍵監聽函數
            holder.cb.setOnClickListener(new View.OnClickListener() {
                public void onClick(View v) {
                    setC(cc);//當被按下后調用函數改變狀態
                }
            });
            if (holder.ckd.equals("t"))
                holder.cb.setChecked(true);
            else
                holder.cb.setChecked(false);
            return convertView;
        }

設一個holder類

import android.widget.CheckBox;
import android.widget.ImageView;
import android.widget.TextView;
 
//ViewHolder類用以儲存每一條項目所需的數據
public class ViewHolder {
    public ImageView tagcolor;//單條項目中的圖片
    public TextView itemname;//單條項目中的文本
    public CheckBox cb;//單條項目中的CheckBox
    public String ckd;//單條項目中用以標識CheckBox狀態的字符串變量
}

即可。


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