Android控件之Radiobutton与RadioGroup

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RadioButton 是一个单选控件，在一个RadioGroup中，各个RadioButton是互斥的

XML文件：

<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"    tools:context="${relativePackage}.${activityClass}" ><RadioGroup     android:id="@+id/RadioGroup1"    android:layout_width="fill_parent"    android:layout_height="match_parent"        >    <RadioButton        android:id="@+id/radioButton1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"                android:layout_marginTop="42dp"        android:text="RadioButton" />    <RadioButton        android:id="@+id/radioButton2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_below="@+id/radioButton1"        android:text="RadioButton" />    <RadioButton        android:id="@+id/radioButton3"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_below="@+id/radioButton2"        android:text="RadioButton" /></RadioGroup></RelativeLayout>

使用OnCheckedChangeListener监听：

package com.example.textview;import android.app.Activity;import android.os.Bundle;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.RadioGroup.OnCheckedChangeListener;public class MainActivity extends Activity {private RadioGroup RadioGroup1=null;private RadioButton RadioButton1=null;private RadioButton RadioButton2=null;private RadioButton RadioButton3=null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);RadioGroup1=(RadioGroup)findViewById(R.id.RadioGroup1);RadioButton1=(RadioButton)findViewById(R.id.radioButton1);RadioButton2=(RadioButton)findViewById(R.id.radioButton2);RadioButton3=(RadioButton)findViewById(R.id.radioButton3);RadioGroup1.setOnCheckedChangeListener(listener);}private OnCheckedChangeListener listener = new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(RadioGroup group, int checkedId) {if(checkedId==RadioButton1.getId()){System.out.println("button 1");}else if(checkedId==RadioButton2.getId()){System.out.println("button 2");}else if(checkedId==RadioButton3.getId()){System.out.println("button 3");}}};}

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