android Listview2 笔记

ListView编程的一般步骤

1）在布局文件中声明ListView控件

2) 使用一维或多维动态数组保存ListView要显示的数据；

3) 构建适配器Adapter,将数据与显示数据的布局页面绑定；

4）通过setAdapter()方法把适配器设置给ListView

第一步：编写布局文件main.xml，添加三个Textview和listview实现整体布局。具体代码如下

View Code

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical"
 4     android:layout_width="fill_parent"
 5     android:layout_height="fill_parent"
 6     >
 7     <TextView android:layout_width="fill_parent"
 8             android:layout_height="wrap_content"
 9             android:text="@string/tv1"
10             android:background="#FFF"
11             android:textColor="#888"
12             android:gravity="center"/>
13     <ListView android:id="@+id/lvCheckedTextView"
14             android:layout_width="fill_parent"
15             android:layout_height="wrap_content"/>
16     
17     <TextView android:layout_width="fill_parent"
18             android:layout_height="wrap_content"
19             android:text="@string/tv2"
20             android:background="#FFF"
21             android:textColor="#888"
22             android:gravity="center"/>
23     <ListView android:id="@+id/lvRadioButton"
24             android:layout_width="fill_parent"
25             android:layout_height="wrap_content"/>
26             
27     <TextView android:layout_width="fill_parent"
28             android:layout_height="wrap_content"
29             android:text="@string/tv3"
30             android:background="#FFF"
31             android:textColor="#888"
32             android:gravity="center"/>
33     <ListView android:id="@+id/lvCheckedButton"
34             android:layout_width="fill_parent"
35             android:layout_height="wrap_content"/>
36         
37 </LinearLayout>

第二步：修改String.xml文件的内容，方便程序或者main.xml访问，具体代码如下

View Code

1 <?xml version="1.0" encoding="utf-8"?>
2 <resources>
3     <string name="hello">Hello World, Listview02Activity!</string>
4     <string name="app_name">Listview02</string>
5     <string name="tv1">单项打勾</string>
6     <string name="tv2">RadioButton</string>
7     <string name="tv3">CheckBox</string>
8 </resources>

第三步：修改ListView01.java，添加listview的相关操作，具体代码如下

View Code

 1 package cn.shaoyangjiang.com;
 2 
 3 import android.app.Activity;
 4 import android.os.Bundle;
 5 import android.widget.ArrayAdapter;
 6 import android.widget.ListView;
 7 
 8 public class Listview02Activity extends Activity {
 9     /** Called when the activity is first created. */
10     @Override
11     public void onCreate(Bundle savedInstanceState) {
12         super.onCreate(savedInstanceState);
13         setContentView(R.layout.main);
14         //得到三个listview
15         ListView listview1 = (ListView)findViewById(R.id.lvCheckedTextView);
16         ListView listview2 = (ListView)findViewById(R.id.lvRadioButton);
17         ListView listview3 = (ListView)findViewById(R.id.lvCheckedButton);
18         //用string来保存listview要显示的数据
19         String[] data = new String[]
20            {"邵洋江加油","你会成功的"};
21         //构建适配器Adapter,将数据与显示数据的布局页面绑定；
22         ArrayAdapter<String> lv1Adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_checked,data);
23         //通过setAdapter()方法把适配器设置给ListView
24         listview1.setAdapter(lv1Adapter);
25         //listview里的内容设置为单选
26         listview1.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
27         
28         ArrayAdapter<String> lv2Adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_single_choice,data);
29         listview2.setAdapter(lv2Adapter);
30         listview2.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
31         
32         ArrayAdapter<String> lv3Adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_multiple_choice,data);
33         listview3.setAdapter(lv3Adapter);
34         listview3.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
35         }
36 }