Android手机开发：ListView的使用

1. 简单的列表

import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class ActivityList1 extends Activity {
	ListView listView;
	private String[] data = { "Android应用专业开发社区:eoeAndroid.com", "eoeAndroid出品软件如下:",
			"eoeInstaller", "eoeDouban", "eoeWhere",
			"eoeInfoAssistant", "eoeDakarGame","eoeTrack" };
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        listView = new ListView(this);
	listView.setAdapter(new ArrayAdapter<String>(this,
		android.R.layout.simple_list_item_1, data));	
        listView.setItemsCanFocus(true);
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
	setContentView(listView);
    }
}

setAdapter函数将listView和ArrayAdapter进行绑定，listView会把ArrayAdapter中的数据显示出来。

2. 每一项可以包含多个View的列表

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

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

public class ActivityList2 extends Activity {

	private List<Map<String, Object>> data;
	private ListView listView = null;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		PrepareData();
		listView = new ListView(this);
		// 利用系统的layout显示一项
//		 SimpleAdapter adapter = new SimpleAdapter(this, data,
//		 android.R.layout.simple_list_item_1, new String[] { "姓名" },
//		 new int[] { android.R.id.text1 });
		// 利用系统的layout显示两项
//		 SimpleAdapter adapter = new SimpleAdapter(this, data,
//		 android.R.layout.simple_list_item_2, new String[] { "姓名","性别" },
//		 new int[] { android.R.id.text1 , android.R.id.text2});
		// 利用自己的layout来进行显示两项
		SimpleAdapter adapter = new SimpleAdapter(this, data,
				R.layout.list_item, new String[] { "姓名", "性别" }, new int[] {
						R.id.mview1, R.id.mview2 });
		listView.setAdapter(adapter);
		setContentView(listView);	
		
		OnItemClickListener listener = new OnItemClickListener() {
			public void onItemClick(AdapterView<?> parent, View view, int position,
					long id) {
				setTitle(parent.getItemAtPosition(position).toString());
			}
		};
		listView.setOnItemClickListener(listener);
	}

	private void PrepareData() {
		data = new ArrayList<Map<String, Object>>();
		Map<String, Object> item;
		item = new HashMap<String, Object>();
		item.put("姓名", "张三小朋友");
		item.put("性别", "男");
		data.add(item);
		item = new HashMap<String, Object>();
		item.put("姓名", "王五同学");
		item.put("性别", "男");
		data.add(item);
		item = new HashMap<String, Object>();
		item.put("姓名", "小李师傅");
		item.put("性别", "女");
		data.add(item);
	}
}

R.layout.list_item文件内容如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="wrap_content">
	<TextView android:id="@+id/mview1" android:layout_width="100px"
		android:layout_height="wrap_content" />

	<TextView android:id="@+id/mview2"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content" />

</LinearLayout>

3. 直接继承ListActivity类的列表

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


public class ActivityList3 extends ListActivity {
      
	private String[] data ={};
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.list3);
		setListAdapter(new ArrayAdapter<String>(this,
				android.R.layout.simple_list_item_1, data));
		
	}

	 protected void onListItemClick(ListView listView, View v, int position, long id) {
	    	super.onListItemClick(listView, v, position, id);
	    	setTitle(listView.getItemAtPosition(position).toString());
	 }	
}

上面的data数组，存放要显示的数据。

R.layout.list3内容如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="wrap_content"
    android:layout_height="wrap_content">
	<ListView android:id="@id/android:list"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"/>
  	<TextView android:id="@id/android:empty"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="对不起，没有数据显示"/>      
</LinearLayout>