List控件的使用1

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        ArrayList<HashMap<String,String>> list=new ArrayList<HashMap<String,String>>();
        HashMap<String,String> map1=new HashMap<String,String>();
        HashMap<String,String> map2=new HashMap<String,String>();
        HashMap<String,String> map3=new HashMap<String,String>();
        HashMap<String,String> map4=new HashMap<String,String>();
        map1.put("user_name", "cheng");
        map1.put("user_ip", "127.0.0.1");
        map2.put("user_name", "chengqing");
        map2.put("user_ip", "127.0.0.2");
        map3.put("user_name", "chengh");
        map3.put("user_ip", "127.0.0.3");
        map4.put("user_name", "chengf");
        map4.put("user_ip", "127.0.0.4");
        list.add(map1);
        list.add(map2);
        list.add(map3);
        list.add(map4);
        SimpleAdapter listAdapter=new SimpleAdapter(this,list,R.layout.user,new String[]{"user_name","user_ip"},new int[]{R.id.user_name,R.id.user_ip});
        setListAdapter(listAdapter);
    }