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重写SimpleAdapter的getView以实现按钮点击响应

时间:2024-3-2 17:41     作者:韩俊     分类: Android


SimpleAdapter是四个适配器里最重要的适配器,它不仅实现了数据的绑定,而且可以自定义控件。
在自定义控件时,如果使用了按钮、复选框、单选框等需要点击监听器的控件,就得重写SimpleAdapter的getView函数来实现。
getView是用来刷新ListView的函数,每次在ListView里新增(新显示)一条记录时,getView就会被调用一次(在这次调用里,getView里就会对这条记录里的按钮设置监听器)。
下面是示例:
这是重写的类:MySimpleAdapter,里面的context变量是为了调用Toast类的makeText函数。

package com.plan;

import java.util.List;
import java.util.Map;

import android.content.Context;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.SimpleAdapter;
import android.widget.Toast;

import com.example.plan.R;

public class MySimpleAdapter extends SimpleAdapter{

    Context context;

    public MySimpleAdapter(Context context, List<? extends Map<String, ?>> data,
     int resource, String[] from, int[] to) {
        super(context, data, resource, from, to);
        this.context = context;
        // TODO Auto-generated constructor stub
    }

     public View getView(int position, View convertView, ViewGroup parent) {
            // TODO Auto-generated method stub
            View v = super.getView(position, convertView, parent);

            Button btn=(Button) v.findViewById(R.id.button1);
            final int p = position;
            Log.d("Position", Integer.toString(position));
            btn.setOnClickListener(new OnClickListener() {   
                @Override
                public void onClick(View v) {
                   // TODO Auto-generated method stub
                   Toast.makeText(context, "删除"+Integer.toString(p),2000).show();
                }
          });
          return v;
        }

}

使用上述类的代码:

plan_list = (ListView)findViewById(R.id.listView_today_plan);//找到控件
        ListAdapter adapter = null;//绑定适配器
        String[] time={"11:09","11:09","11:09"};
,"HelloWorld"};
        boolean[] check = {true,false,false};
        List<Map<String,Object>> listItems = 
                new ArrayList<Map<String,Object>>();
        for(int i = 0; i < time.length;i++){
            Map<String,Object> map = new HashMap<String,Object>();
            map.put("time", time[i]);
            map.put("item", item[i]);
            map.put("check", check[i]);
            listItems.add(map);
        }

        adapter = new MySimpleAdapter(this,listItems,
                R.layout.plan_item,
                new String[]{"time","item","check"},
                new int[]{R.id.textView_time,R.id.textView_item,R.id.checkBox_complish});

        plan_list.setAdapter(adapter);

标签: android

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