RadioGroup简单应用

 

 

 

 

 

 

<?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="fill_parent"
    >
    <TextView
    	android:layout_width="fill_parent"
    	android:layout_height="wrap_content"
    	android:text="@string/title"
    />
 <RadioGroup 
 	android:layout_width="wrap_content"
 	android:layout_height="wrap_content"
 	android:id="@+id/radioGroup"
 	>
 	<RadioButton 
 		android:text="@string/red"
 		android:id="@+id/radioButton_1"
 		android:layout_width="wrap_content"
 		android:layout_height="wrap_content"
 	/>
 	
 	<RadioButton 
 		android:text="@string/green"
 		android:id="@+id/radioButton_2"
 		android:layout_width="wrap_content"
 		android:layout_height="wrap_content"
 	/>
 	
 	<RadioButton 
 		android:text="@string/blue"
 		android:id="@+id/radioButton_3"
 		android:layout_width="wrap_content"
 		android:layout_height="wrap_content"
 	/>
 
 </RadioGroup>
    
    <TextView
    	android:layout_width="fill_parent"
    	android:layout_height="wrap_content"
    	android:text=""
    	android:id="@+id/textTip"
    />
    
   
</LinearLayout>

 

 

 

 

public class RadioButtonActivity extends Activity {
    /** Called when the activity is first created. */
	
	private RadioGroup radioGroup;
	private RadioButton radioButton_1;
	private RadioButton radioButton_2;
	private RadioButton radioButton_3;
	private TextView textTip;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
        radioButton_1 = (RadioButton) findViewById(R.id.radioButton_1);
        radioButton_2 = (RadioButton) findViewById(R.id.radioButton_2);
        radioButton_3 = (RadioButton) findViewById(R.id.radioButton_3);
        textTip = (TextView) findViewById(R.id.textTip);
        
        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {			
			@Override
			public void onCheckedChanged(RadioGroup group, int checkedId) {
				textTip.setText("选择ID："+checkedId);
			}
		});
    }
}