Android中ListView如何使用，求源码？

[size=large]Android中ListView如何使用，求源码？
请详细点，最好能够直接运行的，谢谢[/size]

[color=red]user.xml
<?xml version="1.0" encoding="utf-8"?>
android:orientation="horizontal" android:layout_width="fill_parent"
android:layout_height="fill_parent">

<!-- 用户名文本 -->
<TextView android:id="@+id/userNameId" android:layout_width="wrap_content"
    android:layout_height="wrap_content" android:textSize="10pt"
    android:gravity="left" />

<!-- IP文本 -->
<TextView android:id="@+id/ipId" android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:textSize="10pt"
    android:gravity="right" />

main.xml
<?xml version="1.0" encoding="utf-8"?>
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">

<LinearLayout android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:orientation="vertical"
    android:paddingLeft="10px" android:paddingRight="10px"
    android:paddingTop="10px" android:paddingBottom="10px">

    <ListView android:id="@id/android:list" android:layout_width="fill_parent"
        android:layout_height="wrap_content" android:scrollbars="vertical"
        android:drawSelectorOnTop="true" />

</LinearLayout>

ListViewActivity.java
package com.duoguo.android;

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

import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleAdapter;

/**

• ListView的使用
• @author shyboy(897948924@qq.com)

• */
  public class ListViewActivity extends ListActivity {

  @Override
  public void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  
  ArrayList<HashMap<String, String>> list = new ArrayList<HashMap<String, String>>();// 实例化ArrayList链表，用来存放HashMap对象
  
  // 实例化HashMap对象，用来存放用户名和IP
  HashMap<String, String> map1 = new HashMap<String, String>();
  map1.put("user_name", "shyboy");
  map1.put("user_ip", "192.168.0.1");
  HashMap<String, String> map2 = new HashMap<String, String>();
  map2.put("user_name", "playboy");
  map2.put("user_ip", "192.168.0.2");
  HashMap<String, String> map3 = new HashMap<String, String>();
  map3.put("user_name", "simplyboy");
  map3.put("user_ip", "192.168.0.3");
  
  // 添加HashMap集合到ArrayList链表中
  list.add(map1);
  list.add(map2);
  list.add(map3);
  
  SimpleAdapter listSimpleAdapter = new SimpleAdapter(this, list,
          R.layout.user, new String[] { "user_name", "user_ip" },
          new int[] { R.id.userNameId, R.id.ipId });// 实例化适配器
  this.setListAdapter(listSimpleAdapter);
  

  }

  // 当点击ListView内容时触发该事件
  @Override
  protected void onListItemClick(ListView l, View v, int position, long id) {

  super.onListItemClick(l, v, position, id);
  System.out.println("id is:" + id);
  System.out.println("position is:" + position);
  

  }

}

希望对你有所帮助！！！[/color]