ListView通过SimpleAdapter实现数据显示

package com.sqlite;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;


import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

public class DBActivity extends Activity {
    /** Called when the activity is first created. */
	private ListView listView;
	private PersonService personService;
	private List<Person> persons;
	private List<HashMap<String, Object>> data;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        personService = new PersonService(this);
        
        listView = (ListView)findViewById(R.id.listView);
        listView.setOnItemClickListener(new ItemClickListener());
        
        show();
    }
    
    private class ItemClickListener implements  OnItemClickListener{

		public void onItemClick(AdapterView<?> parent, View view, int position,
				long id) {
			// TODO Auto-generated method stub
			String name = (String)data.get(position).get("name");
			Toast.makeText(DBActivity.this, name, 1).show();
		}
    	
    }
    
    
	private void show() {
		
		//从数据库获得前10条数据
		
		
		data = new ArrayList<HashMap<String,Object>>();
		persons = personService.getScrollData(0, 10);
		for(Person person : persons){
			HashMap<String, Object> item= new HashMap<String, Object>();
			item.put("name", person.getName());
			item.put("phone", person.getPhone());
			item.put("amount", person.getAmount());
			item.put("id", person.getId());
			
			data.add(item);
			
		}
		//创建适配器对象
	     SimpleAdapter adapter = new SimpleAdapter(this, data, R.layout.item,
	    		 new String[]{"name","phone","amount"}, new int[]{R.id.name,R.id.phone,R.id.amount});
	
		listView.setAdapter(adapter);
			
		
	}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ListView 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:id="@+id/listView"
        />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="horizontal" >

    <TextView
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:id="@+id/name"/>
     <TextView
        android:layout_width="150dp"
        android:layout_height="100dp"
        android:id="@+id/phone"/>
     <TextView
        android:layout_width="fill_parent"
        android:layout_height="100dp"
        android:id="@+id/amount"/>

</LinearLayout>