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  • 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。

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  • 原文地址:https://www.cnblogs.com/mybkn/p/2512491.html
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