Android编程之控件ListView使用方法

package com.list; 
import java.util.ArrayList; 
import java.util.HashMap; 
import android.app.Activity; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.AdapterView.OnItemSelectedListener; 
import android.widget.ListView; 
import android.widget.SimpleAdapter; 
public class ListTest extends Activity 
{ 
 /** Called when the activity is first created. */ 
 @Override 
 public void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.main); 
  ArrayList<HashMap<String, Object>> users = new ArrayList<HashMap<String, Object>>(); 
  for (int i = 0; i < 20; i++) { 
   HashMap<String, Object> user = new HashMap<String, Object>(); 
   user.put("img", R.drawable.icon); 
   user.put("username", "姓名(" + i+")"); 
   user.put("age", (20 + i) + ""); 
   users.add(user); 
  } 
  SimpleAdapter saImageItems = new SimpleAdapter(this, 
    users,// 数据来源 
    //R.layout.user,//每一个user xml 相当ListView的一个组件 
    R.layout.user_layout,//每一个user xml 相当ListView的一个组件 
    new String[] { "img", "username", "age" }, 
    // 分别对应view 的id 
    new int[] { R.id.img, R.id.name, R.id.age }); 
  //获取适配器 
  ListView listView = (ListView) findViewById(R.id.users); 
  listView.setAdapter(saImageItems); 
  listView.setOnItemClickListener(new OnItemClickListener() 
  { 
   @Override 
   public void onItemClick(AdapterView<?> parent,View view,int position,long id) 
   { 
    ListView listView = (ListView) parent; 
    Log.v("Test", "id = " + id + "("+ listView.getItemAtPosition(position).toString() + ")"); 
   } 
  }); 
  /* 
  listView.setOnItemSelectedListener(new OnItemSelectedListener() { 
   @Override 
   public void onItemSelected(AdapterView<?> parent,View view,int position,long id) 
   { 
    ListView listView = (ListView) parent; 
    Log.v("Test", "id = " + id + "("+ listView.getItemAtPosition(position).toString() + ")"); 
   } 
   @Override 
   public void onNothingSelected(AdapterView<?> parent) 
   { 
    // TODO Auto-generated method stub 
   } 
  }); 
  */ 
 }  
}