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    <p>I recommend you to refer to the <a href="http://blog.flexexamples.com/2008/05/28/displaying-radiobutton-controls-using-the-repeater-in-flex/" rel="nofollow">following sample</a> and add <code>RadioButtonGroup</code> to your repeater groups and listen to <code>change</code> events instead of <code>click</code>. You can listen <code>change</code> event right in <code>RadioButtonGroup</code> and check <code>if (radioGroup.selectedValue.correct)</code> for correctness of new selection. See <a href="http://www.igorcosta.com/flex3/doc/mx/controls/RadioButtonGroup.html" rel="nofollow">corresponding documentation</a>.</p> <p>To have possibility to assign radiogroups unique name you have to extract inner repeater with answers into separate component. Breaking your application into smaller components can make your application more clear and readable. You can treat every MXML file as a class (as in OOP) but in declarative form. And to tell the true every MXML component is a class which inherited from root-node-class.</p> <p>Lets look at the code.</p> <p>First, our inner component which serves answers:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;mx:VBox xmlns:mx="http://www.adobe.com/2006/mxml"&gt; &lt;mx:Metadata&gt; [Event(name="rightAnswerEvent", type="AnswerEvent")] &lt;/mx:Metadata&gt; &lt;mx:Script&gt; &lt;![CDATA[ import mx.collections.ArrayCollection; [Bindable] public var answers:ArrayCollection; protected function answerGroup_changeHandler(event:Event):void { if (answerGroup.selectedValue.correct) dispatchEvent(new AnswerEvent(AnswerEvent.RIGHT_ANSWER_EVENT)); } ]]&gt; &lt;/mx:Script&gt; &lt;mx:RadioButtonGroup change="answerGroup_changeHandler(event)" id="answerGroup" /&gt; &lt;mx:Repeater dataProvider="{answers}" id="answersRepeater"&gt; &lt;mx:RadioButton group="{answerGroup}" label="{answersRepeater.currentItem.text}" value="{answersRepeater.currentItem}" /&gt; &lt;/mx:Repeater&gt; &lt;/mx:VBox&gt; </code></pre> <p>It gets <code>answers</code> collection as input and fires our custom event to inform some components about right answer (see <code>Metadata</code> tag).</p> <p>Our custom event is pretty simple an looks like the following:</p> <pre><code>package { import flash.events.Event; public class AnswerEvent extends Event { public static const RIGHT_ANSWER_EVENT:String = "rightAnswerEvent"; public function AnswerEvent(type:String) { super(type); } } } </code></pre> <p>So now our top level component:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;mx:Application layout="vertical" xmlns:local="*" xmlns:mx="http://www.adobe.com/2006/mxml"&gt; &lt;mx:Script&gt; &lt;![CDATA[ import mx.collections.ArrayCollection; [Bindable] private var questions:ArrayCollection = new ArrayCollection(); [Bindable] private var scoreCounter:int; ]]&gt; &lt;/mx:Script&gt; &lt;mx:Label text="{'Score ' + scoreCounter}" /&gt; &lt;mx:Repeater dataProvider="{questions}" id="questionRepeater"&gt; &lt;mx:Label text="{questionRepeater.currentItem.question}" /&gt; &lt;local:AnswerGroup answers="{questionRepeater.currentItem.answers}" rightAnswerEvent="scoreCounter++" /&gt; &lt;/mx:Repeater&gt; &lt;/mx:Application&gt; </code></pre> <p>I omitted initialization code to populate our <code>Question</code> and <code>Answer</code> domain objects with data from XML (see previous thread).</p> <p>So now we have compact modularized code where every part solves its own task.</p> <p>Hope this helps!</p>
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    1. POHow to check the state of a Radio Button in Flex 3?
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    1. CO@Constantiner hmm but how can I create as many groups as questions? cause if I create a RadioButtonGroup outside of my outer repeater, I get only one group. if I try to create it already within the first repeater, I get an error: "Unable to generate initialization code within Repeater, due to id or data binding on a component that is not a visual child." To be able to access each of the groups, I would have to give each a different id. But is it even possible to do it when using a Repeater?
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    2. CO@Cela I suggest you to extract inner repeater group in a separate MXML component.
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    3. CO@Constantin I'm really just a beginner... could you explain it more? how should my separate component look like and how would I reference it? I tried to do it, but i just get tons of errors. could you please give the answer according to my mxml code I showed in my question? thanks..
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