使用RadioGroup与RadioButton实现多选一

package com.Thinker.checkbox;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;

public class MainActivity extends Activity implements OnCheckedChangeListener{
    private RadioGroup radioGroup;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        /**
         * 找到相应控件对象赋给这个引用
         */
        radioGroup = (RadioGroup) findViewById(R.id.radioGroup1);
        /**
         * 设置监听事件
         */
        radioGroup.setOnCheckedChangeListener(this);
    }
    @Override
    public void onCheckedChanged(RadioGroup arg0, int checkedId) {
        // TODO Auto-generated method stub
        //checkedId是所选所监控到的RadioGroup中的RadioButton的id
        switch(checkedId){
        case R.id.radio0:
            Log.i("tag", "你确定你是男生？");
            break;
        case R.id.radio1: 
            Log.i("tag", "你确定你是女生");
            break;
        case R.id.radio2: 
            Log.i("tag", "再想想你到底是男生还是女生");
            break;
            default:
                break;
        }
    }
    
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <!-- 注意checkbox选中之后还可以进行取消 -->

    <RadioGroup
        android:id="@+id/radioGroup1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="14dp" >

        <RadioButton
            android:id="@+id/radio0"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="男" />

        <RadioButton
            android:id="@+id/radio1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="女" />

        <RadioButton
            android:id="@+id/radio2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="其他" />
    </RadioGroup>

</RelativeLayout>