flex 21 list 다중선택 test

listTest.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
 <mx:Panel width="250" height="200" layout="absolute" horizontalCenter="0" verticalCenter="0">
 <mx:List horizontalCenter="0" verticalCenter="-20" dataProvider="{fruit}" id="li" allowMultipleSelection="true" height="100"></mx:List>
 <mx:Button x="82" y="128" label="click me" click="choice()"/>
 </mx:Panel> 
 <mx:Script>
  <![CDATA[
   import mx.collections.ArrayCollection;
   [Bindable]
   public var fruit:ArrayCollection = new ArrayCollection([
   {label:"banana", data:0}, {label:"peach", data:1},
   {label:"strawberry", data:2}, {label:"orange", data:3}]);
     
   private function choice():void{
    var str:String="";
    for(var i:int=li.selectedItems.length-1;i>-1;i--){
     str+=li.selectedItems[i].label+"\n";
    }
    mx.controls.Alert.show(str);
   }
  ]]>
 </mx:Script>
</mx:Application>