tourdeflexmodules/src/spark/controls/RadioButtonExample.mxml

<?xml version="1.0" encoding="utf-8"?>
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  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
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      http://www.apache.org/licenses/LICENSE-2.0

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  distributed under the License is distributed on an "AS IS" BASIS,
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<s:Module xmlns:fx="http://ns.adobe.com/mxml/2009" 
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx">

	<fx:Script>
		<![CDATA[
			protected function scoreClickHandler(event:MouseEvent):void
			{
				var score:Number = 0.0;
				
				if (group1.selectedValue=="True")
					score=33.34;
				if (group2.selectedValue=="South Africa")
					score=score+33.34;
				if (group3.selectedValue=="False")
					score=score+33.34;
				scoreText.text = "You scored " + numberFormatter.format(score).toString()+"%";
			}
		]]>
	</fx:Script>
	<fx:Declarations>
		<s:RadioButtonGroup id="group1"/>
		<s:RadioButtonGroup id="group2"/>
		<s:RadioButtonGroup id="group3"/>
		<mx:NumberFormatter id="numberFormatter"
							precision="0"
							rounding="nearest"/>
	</fx:Declarations>
	<fx:Style>
		@namespace "library://ns.adobe.com/flex/spark";
		
		RadioButton{ 
			baseColor: #FFFFFF; 
		}
		
	</fx:Style>
	
	<s:Panel title="RadioButton Sample" width="100%" height="100%">
		
		<s:layout>
			<s:VerticalLayout paddingLeft="10" paddingRight="10" paddingTop="10" paddingBottom="10"/>
		</s:layout>
		
		<s:HGroup>
			<s:VGroup>
				<s:Label text="1) The sky is blue:"/>
				<s:RadioButton id="trueRadioBtn" label="True" groupName="group1"/>
				<s:RadioButton id="falseRadioBtn" label="False" groupName="group1"/>
			</s:VGroup>	
			<s:VGroup paddingLeft="20">
				<s:Label text="2) Which of the following is not a continent?"/>
				<s:RadioButton id="multiRadioBtnA" label="North America" groupName="group2"/>
				<s:RadioButton id="multiRadioBtnB" label="Europe" groupName="group2"/>
				<s:RadioButton id="multiRadioBtnC" label="Asia" groupName="group2"/>
				<s:RadioButton id="multiRadioBtnD" label="South Africa" groupName="group2"/>
			</s:VGroup>
			<s:VGroup paddingLeft="20">
				<s:Label text="3) Tallahasee is the capital of Alabama:"/>
				<s:RadioButton id="trueRadioBtn3" label="True" groupName="group3" />
				<s:RadioButton id="falseRadioBtn3" label="False" groupName="group3"/>
			</s:VGroup>
			<s:VGroup horizontalAlign="contentJustify">
				<s:Button id="scoreBtn" label="Score Me!" click="scoreClickHandler(event)"/>
				<s:Label id="scoreText"/>
			</s:VGroup>
		</s:HGroup>
		
		<s:Label width="100%" verticalAlign="justify"
				 text="The RadioButton control is a single choice in a set of mutually 
exclusive choices. A RadioButton group is composed of two or more RadioButton controls with
the same group name. Only one member of the group can be selected at any given time." />
	</s:Panel>
	
		
</s:Module>