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>