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【Android基础篇】重写SimpleAdapter的getView以实现旋钮点击响应

热度:62   发布时间:2016-04-28 01:54:09.0
【Android基础篇】重写SimpleAdapter的getView以实现按钮点击响应

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);
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