android RadioGroup的使用

创建一个MainActivity.java的主类

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">
    <TextView
        android:id="@+id/radiobutton_textview"
        android:layout_width="fill_parent"
        android:layout_height="50dip"
        android:textSize="18dip"
        android:textStyle="bold"
        android:background="@android:drawable/title_bar"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:gravity="center_vertical"
        />
     <RadioGroup
        android:id="@+id/group"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <RadioButton
            android:id="@+id/button1"
            android:layout_width="fill_parent"
            android:layout_height="50dip"
            android:textSize="20dip"
            android:paddingLeft="30dip"
            android:text="Android新手"
            android:button="@null"                    
            android:drawableRight="@android:drawable/btn_radio"/>
        <View
            android:layout_width="fill_parent"
            android:layout_height="1px"
            android:background="?android:attr/listDivider"
            />
        <RadioButton
            android:id="@+id/button2"
            android:layout_width="fill_parent"
            android:layout_height="50dip"
            android:textSize="20dip"
            android:paddingLeft="30dip"
            android:text="Android高手"
            android:button="@null"
            android:drawableRight="@android:drawable/btn_radio"/>
       </RadioGroup> 
</LinearLayout>

package endual.radio;

import android.app.Activity;
import android.os.Bundle;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.TextView;

public class MainActivity extends Activity {  
    private TextView textView;  
    private RadioGroup group;  
    
    private RadioButton rb1 ;
    private RadioButton rb2 ;
   /** Called when the activity is first created. */  
      @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
            setContentView(R.layout.main);  
  
        textView = (TextView) findViewById(R.id.radiobutton_textview);  
        group = (RadioGroup) findViewById(R.id.group);  
        
        this.rb1 = (RadioButton) this.findViewById(R.id.button1) ;
        this.rb2 = (RadioButton) this.findViewById(R.id.button2) ;
        
  
        // 单选按钮组监听事件  
        group.setOnCheckedChangeListener(new OnCheckedChangeListener() {  
  
            @Override  
                public void onCheckedChanged(RadioGroup group, int checkedId) {  
                // 根据ID判断选择的按钮  
                    if (checkedId == R.id.button1) {  
                    	
                        textView.setText("Android新手");  
                        rb1.setText("我是1") ;
                        String msg = rb1.getText().toString() ; //获取单独的radioButton的按钮
                        rb2.setText(msg) ;
                        //System.out.println();
                    } else {  
                        textView.setText("Android高手");  
                        rb2.setText("我是2") ;
                    }  
                }  
          });  
        

        
        
    }  
}

RadioGroup注册监听事件OnCheckedChangeListener()，在onCheckedChanged实现业务逻辑。