自定义Tree组件图标(ICON)

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" fontSize="12" backgroundGradientAlphas="[1.0, 1.0]" backgroundGradientColors="[#FFFFFF, #FFFFFF]" width="270" height="420">
	<mx:Script>
		<![CDATA[
			[Embed(source="gif/ico_zp.gif")]
			[Bindable]
			public var ico_zp:Class;
			
			[Embed(source="gif/ico_rj.gif")]
			[Bindable]
			public var ico_rj:Class;
			
			[Embed(source="gif/ico_dtyx1.gif")]
			[Bindable]
			public var ico_dtyx1:Class;
			
			[Embed(source="gif/ico_test.gif")]
			[Bindable]
			public var ico_test:Class;
			
			[Embed(source="gif/icon_tx.gif")]
			[Bindable]
			public var icon_tx:Class;
			
			[Embed(source="gif/ico_park.gif")]
			[Bindable]
			public var ico_park:Class;
			
			[Embed(source="gif/ico_mm.gif")]
			[Bindable]
			public var ico_mm:Class;
			
			[Embed(source="gif/icon_yr.gif")]
			[Bindable]
			public var icon_yr:Class;
		
			[Embed(source="gif/ico_lw_bg.gif")]
			[Bindable]
			public var ico_lw_bg:Class;
			
			[Embed(source="gif/ico_city.gif")]
			[Bindable]
			public var ico_city:Class;
			
			[Embed(source="gif/ico_cg.gif")]
			[Bindable]
			public var ico_cg:Class;
			
			[Embed(source="gif/ico_music_bg.gif")]
			[Bindable]
			public var ico_music_bg:Class;
			
			[Embed(source="gif/icon_28.gif")]
			[Bindable]
			public var icon_28:Class;
		
			[Bindable]
			private var _data:XML = <data>
						<item name="照片" ico="ico_zp"/>
						<item name="日记" ico="ico_rj">
							<item name="礼物" ico="ico_lw_bg"/>
							<item name="足迹" ico="ico_city"/>
							<item name="模拟炒股" ico="ico_cg"/>
							<item name="音乐" ico="ico_music_bg"/>
							<item name="答题" ico="icon_28"/>
						</item>
						<item name="动他一下" ico="ico_dtyx1"/>
						<item name="测试" ico="ico_test"/>
						<item name="知我多少" ico="icon_tx"/>
						<item name="争车位" ico="ico_park"/>
						<item name="朋友买卖" ico="ico_mm"/>
						<item name="咬人" ico="icon_yr"/>
					</data>
		]]>
	</mx:Script>
	<mx:Tree x="10" y="10" width="250" height="400" labelField="@name" folderClosedIcon="{ico_rj}" folderOpenIcon="{ico_rj}" iconField="@ico" dataProvider="{_data.item}"></mx:Tree>
</mx:Application>