通过自定义控件实现：在Repeater 控件中使用RadioButton.

示例：

源文件：
comps/MyComp.as     ：

/**
 * http://blog.flexexamples.com/2008/05/28/displaying-radiobutton-controls-using-the-repeater-in-flex-redux/
 */
package comps {
    import flash.events.Event;

    import mx.containers.ApplicationControlBar;
    import mx.containers.Canvas;
    import mx.containers.Form;
    import mx.containers.FormItem;
    import mx.containers.HBox;
    import mx.controls.Alert;
    import mx.controls.Label;
    import mx.controls.RadioButton;
    import mx.controls.RadioButtonGroup;
    import mx.core.Application;
    import mx.core.Repeater;
    import mx.core.UIComponentDescriptor;
    import mx.styles.CSSStyleDeclaration;
    import mx.styles.StyleManager;

    public class MyComp extends Canvas {
        private var arr:Array;
        private var appControlBar:ApplicationControlBar;
        private var form:Form;
        private var formItem:FormItem;
        private var lbl:Label;
        private var hBox:HBox;
        private var radioGroup:RadioButtonGroup;
        private var radioRepeater:Repeater;

        public function MyComp() {
            super();
            init();
        }

        private function init():void {
            var alertCSS:CSSStyleDeclaration;
            alertCSS = StyleManager.getStyleDeclaration("Alert");
            alertCSS.setStyle("backgroundAlpha", 0.8);
            alertCSS.setStyle("backgroundColor", "black");
            alertCSS.setStyle("borderAlpha", 0.8);
            alertCSS.setStyle("borderColor", "black");

            arr = [];
            arr.push({label:"Red", data:"red"});
            arr.push({label:"Orange", data:"haloOrange"});
            arr.push({label:"Yellow", data:"yellow"});
            arr.push({label:"Green", data:"haloGreen"});
            arr.push({label:"Blue", data:"haloBlue"});

            radioGroup = new RadioButtonGroup();

            lbl = new Label();

            formItem = new FormItem();
            formItem.label = "selectedValue:";
            formItem.addChild(lbl);

            form = new Form();
            form.styleName = "plain";
            form.addChild(formItem);

            appControlBar = new ApplicationControlBar();
            appControlBar.dock = true;
            appControlBar.addChild(form);
            Application.application.addChildAt(appControlBar, 0);

            hBox = new HBox();
            hBox.setStyle("horizontalGap", 60);
            addChild(hBox);

            var descriptorProps:Object = {};
            descriptorProps.type = RadioButton;
            descriptorProps.document = this;
            descriptorProps.propertiesFactory = radioPropFac;
            descriptorProps.events = {change:"radioButton_change"};

            var radioDescriptor:UIComponentDescriptor = new UIComponentDescriptor(descriptorProps);

            radioRepeater = new Repeater();
            radioRepeater.dataProvider = arr;
            radioRepeater.childDescriptors = [radioDescriptor];
            radioRepeater.initializeRepeater(hBox, true);
        }

        private function radioPropFac():Object {
            var obj:Object = {};
            obj.label = radioRepeater.currentItem.label;
            obj.group = radioGroup;
            return obj;
        }

        public function radioButton_change(evt:Event):void {
            var radio:RadioButton = RadioButton(evt.currentTarget);
            var item:Object = radio.getRepeaterItem();
            var cssObj:CSSStyleDeclaration;
            cssObj = StyleManager.getStyleDeclaration("Alert");
            cssObj.setStyle("modalTransparencyColor", item.data);
            cssObj.setStyle("themeColor", item.data);
            Alert.show(item.label, "getRepeaterItem()");

            callLater(updateSelectedValue, [evt]);
        }

        private function updateSelectedValue(evt:Event):void {
            lbl.text = radioGroup.selectedValue.toString();
        }
    }
}

mxml文件：

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/05/28/displaying-radiobutton-controls-using-the-repeater-in-flex-redux/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        xmlns:comps="comps.*"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <comps:MyComp />

</mx:Application>