Android入门之单选按钮(RadioButton)

MainActivity.java

package com.jk.test;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.RadioButton;
import android.widget.RadioGroup;

public class MainActivity extends Activity {
	private RadioButton eatButton;
	private RadioButton sleepButton;
	private RadioButton dotaButton;
	private RadioGroup groupButton;

	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		eatButton = (RadioButton) findViewById(R.id.eatButtonid);
		sleepButton = (RadioButton) findViewById(R.id.sleepButtonid);
		dotaButton = (RadioButton) findViewById(R.id.dotaButtonid);
	
		RadioGroupListener listener1 = new RadioGroupListener();
		groupButton.setOnCheckedChangeListener(listener1);
		
		RadioButtonListener listener2 = new RadioButtonListener();
		eatButton.setOnCheckedChangeListener(listener2);
		sleepButton.setOnCheckedChangeListener(listener2);
		dotaButton.setOnCheckedChangeListener(listener2);
	}
	class RadioButtonListener implements OnCheckedChangeListener{
		public void onCheckedChanged(CompoundButton v, boolean isChecked) {
			System.out.println(v.getId()+"isChecked--->" + isChecked);			
		}		
	}
  class RadioGroupListener implements android.widget.RadioGroup.OnCheckedChangeListener{
		public void onCheckedChanged(RadioGroup v, int checkedId) {
			 if(checkedId == eatButton.getId())
				 System.out.println("选中了eatButton");
			 else if(checkedId == sleepButton.getId())
				 System.out.println("选中了sleepButton");
			 else if(checkedId == dotaButton.getId())
				 System.out.println("选中了dotaButton");
		}
	}
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
}

<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=".MainActivity" >
  <RadioGroup
       android:id="@+id/radioGroupId"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:orientation="horizontal">
	 <RadioButton
	    android:id="@+id/eatButtonid"
	    android:layout_width="wrap_content"
	    android:layout_height="wrap_content"
	    android:text="吃饭"
	    />
     <RadioButton
         	    android:id="@+id/sleepButtonid"
	    android:layout_width="wrap_content"
	    android:layout_height="wrap_content"
	    android:text="睡觉"
	    />
	 <RadioButton
	    android:id="@+id/dotaButtonid"
	    android:layout_width="wrap_content"
	    android:layout_height="wrap_content"
	    android:text="dota"
	    />
	 </RadioGroup>
</LinearLayout>