16 ListView

package mars.listview;

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;
public class Activity01 extends ListActivity {

    /** Called when the activity is first created. */

    @Override

    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>();

        map1.put("user_name", "zhangsan");

        map1.put("user_ip", "192.168.0.1");

        map2.put("user_name", "zhangsan");

        map2.put("user_ip", "192.168.0.2");

        map3.put("user_name", "wangwu");

        map3.put("user_ip", "192.168.0.3");

        list.add(map1);

        list.add(map2);

        list.add(map3);

        MyAdapter listAdapter = new MyAdapter(this, list,

                R.layout.user1, new String[] { "user_name", "user_ip" },

                new int[] { R.id.user_name,R.id.user_ip});

        setListAdapter(listAdapter);

    }
@Override

    protected void onListItemClick(ListView l, View v, int position, long id) {

        // TODO Auto-generated method stub

        super.onListItemClick(l, v, position, id);

        System.out.println("id----------------" + id);

        System.out.println("position----------" + position);

    }
}

<?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" android:paddingLeft="10dip"

    android:paddingRight="10dip" android:paddingTop="1dip"

    android:paddingBottom="1dip">

    <TextView android:id="@+id/user_name" android:layout_width="180dip"

        android:layout_height="30dip" android:textSize="5pt"

        android:singleLine="true" />

    <TextView android:id="@+id/user_ip" android:layout_width="fill_parent"

        android:layout_height="fill_parent" android:gravity="right"

        android:textSize="5pt" />

</LinearLayout>

根据列表的适配器类型，列表分为三种，ArrayAdapter，SimpleAdapter和SimpleCursorAdapter
其中以ArrayAdapter最为简单，只能展示一行字。SimpleAdapter有最好的扩充性，可以自定义出各种效果。
SimpleCursorAdapter可以认为是SimpleAdapter对数据库的简单结合，可以方面的把数据库的内容以列表的形式展示出来。