android CheckBox控件的定义及事件监听

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android CheckBox控件的定义及事件监听，本例实现CheckBox控件的定义及点击事件的监听并显示结果，运行效果截图如下：

CheckBox控件的定义,main.xml内容如下：

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. <EditText 
8.     android:id="@+id/editText1"   
9.     android:layout_width="fill_parent"  
10.     android:layout_height="wrap_content"  
11.     android:text="请选择" 
12.     /> 
13. <CheckBox 
14.     android:id="@+id/beijing" 
15.     android:layout_width="wrap_content" 
16.     android:layout_height="wrap_content" 
17.     android:text="北京" 
18.     /> 
19. <CheckBox 
20.     android:id="@+id/shanghai" 
21.     android:layout_width="wrap_content" 
22.     android:layout_height="wrap_content" 
23.     android:text="上海" 
24.     /> 
25. <CheckBox 
26.     android:id="@+id/shenzhen" 
27.     android:layout_width="wrap_content" 
28.     android:layout_height="wrap_content" 
29.     android:text="深圳" 
30.     /> 
31. </LinearLayout> 

activity CheckBoxTest.java内容如下：

1. package checkbox.pack; 
2.  
3. import android.app.Activity; 
4. import android.os.Bundle; 
5. import android.widget.CheckBox; 
6. import android.widget.CompoundButton; 
7. import android.widget.EditText; 
8.  
9. public class CheckBoxTest extends Activity { 
10.      
11.     //对控件对象进行声明 
12.     CheckBox beijing=null; 
13.     CheckBox shanghai=null; 
14.     CheckBox shenzhen=null; 
15.     EditText editText1=null; 
16.     @Override 
17.     public void onCreate(Bundle savedInstanceState) { 
18.         super.onCreate(savedInstanceState); 
19.         setContentView(R.layout.main); 
20.         //通过控件的ID来得到代表控件的对象 
21.         beijing=(CheckBox)findViewById(R.id.beijing); 
22.         shanghai=(CheckBox)findViewById(R.id.shanghai); 
23.         shenzhen=(CheckBox)findViewById(R.id.shenzhen); 
24.         editText1=(EditText)findViewById(R.id.editText1); 
25.         //给CheckBox设置事件监听 
26.         beijing.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){ 
27.             @Override 
28.             public void onCheckedChanged(CompoundButton buttonView, 
29.                     boolean isChecked) { 
30.                 // TODO Auto-generated method stub 
31.                 if(isChecked){ 
32.                     editText1.setText(buttonView.getText()+"选中"); 
33.                 }else{ 
34.                     editText1.setText(buttonView.getText()+"取消选中"); 
35.                 } 
36.             } 
37.         }); 
38.         shanghai.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){ 
39.             @Override 
40.             public void onCheckedChanged(CompoundButton buttonView, 
41.                     boolean isChecked) { 
42.                 // TODO Auto-generated method stub 
43.                 if(isChecked){ 
44.                     editText1.setText(buttonView.getText()+"选中"); 
45.                 }else{ 
46.                     editText1.setText(buttonView.getText()+"取消选中"); 
47.                 } 
48.             } 
49.         }); 
50.         shenzhen.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){ 
51.             @Override 
52.             public void onCheckedChanged(CompoundButton buttonView, 
53.                     boolean isChecked) { 
54.                 // TODO Auto-generated method stub 
55.                 if(isChecked){ 
56.                     editText1.setText(buttonView.getText()+"选中"); 
57.                 }else{ 
58.                     editText1.setText(buttonView.getText()+"取消选中"); 
59.                 } 
60.             } 
61.         }); 
62.     } 
63. }