RadioGroup和RadioButton

Activity_main.xml

<LinearLayout 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="com.example.radiobuttondemo.MainActivity" >

<RadioGroup

android:id="@+id/radioGroup1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:orientation="horizontal">

<RadioButton

android:id="@+id/radio0"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:checked="true"

android:text="游泳" />

<RadioButton

android:id="@+id/radio1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="球类" />

<RadioButton

android:id="@+id/radio2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="编程" />

</RadioGroup>

</LinearLayout>

MainActivity.java

package com.example.radiobuttondemo;

import android.os.Bundle;

import android.support.v7.app.ActionBarActivity;

import android.util.Log;

import android.widget.CompoundButton;

import android.widget.RadioGroup;

import android.widget.RadioGroup.OnCheckedChangeListener;

public class MainActivity extends ActionBarActivity implements OnCheckedChangeListener{

RadioGroup rg;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

rg=(RadioGroup) findViewById(R.id.radioGroup1);

rg.setOnCheckedChangeListener(this);

}

@Override

public void onCheckedChanged(RadioGroup group, int checkedId) {

switch(checkedId){

case R.id.radio0:

Log.i("msg","游泳");

break;

case R.id.radio1:

Log.i("msg","球类");

break;

case R.id.radio2:

Log.i("msg","编程");

break;

}

}

}