效果见图

初始化界面

输入“设置”,进行搜索、匹配后界面

下面是代码 <![CDATA[ import mx.events.FlexEvent; import mx.utils.StringUtil; import spark.events.TextOperationEvent;

		public var rawList:XML = 
			<apps name="应用程序" >
			  <item name="关于"
			  		icon="plugins/about_002/assets/icons/about_48.png" 
			  		iconSmall="plugins/about_002/assets/icons/about_24.png" 
			  		moduleUrl="plugins/about_002/Ahout_002.swf"
			  		version="1.0"  date="2013-5-13"  author="way" type="plugin"
			  		description="关于能源管理中心的一个说明" />

			 <item name="程序管理" 
			  		icon="plugins/appManager_001/assets/icons/apps_48.png" 
			  		iconSmall="plugins/appManager_001/assets/icons/apps_24.png"
			  		moduleUrl="plugins/appManager_001/AppManager_001.swf"
			  		version="1.0"  date="2013-3-5"  author="way" type="plugin"  resizable="false"
			  		description="对系统应用,及用户自定义应用进行管理"
			  		shortCutCreated="true"/>

			  <item name="导航设置" 
			  		icon="plugins/navigatorSetting_001/assets/icons/gears_48.png" 
			  		iconSmall="plugins/navigatorSetting_001/assets/icons/gears_24.png" 
			  		moduleUrl="plugins/navigatorSetting_001/NavigatorSetting_001.swf"
			  		version="1.0"  date="2013-3-13" author="way" type="plugin" resizable="false"
					description="对导航进行设置"/>
			  <item name="主题设置" 
			  		icon="plugins/themeSetting_001/assets/icons/icon_48.png" 
			  		iconSmall="plugins/themeSetting_001/assets/icons/icon_24.png" 
			  		moduleUrl="plugins/themeSetting_001/ThemeSetting_001.swf"
			  		version="1.0"  date="2013-3-5" author="way" type="plugin" resizable="false"
			  		description="对系统的主题、样式进行设置"/>
		    </apps>
			;     

		[Bindable]
		public var rawListShow:XML = null;  //搜索过滤后的数据

		protected function init(event:FlexEvent):void
		{
			getData();
		}

		protected function textinput1_changeHandler(event:TextOperationEvent):void
		{
			getData();
		}

		//初始化数据
		private function getData():void{
			if(StringUtil.trim(textInput.text) == ""){
				rawListShow = rawList ;

			}else{
				createNewXml(textInput.text,rawList);
			}

			/* 打开或关闭指定项目下的所有树项目。如果设置 dataProvider 之后立即调用 expandChildrenOf(),
			则您可能看不到正确的行为。您应该等待对组件进行验证或调用 validateNow() 方法 */
			tree1.validateNow();

			expandtree();
		}

		//搜索过滤后,生产新的xml
		private function createNewXml(searchString:String, xml:XML):void{
			rawListShow =<apps  name="应用程序" />;

			for(var i:int = 0; i<xml.children().length(); i++)
			{
				var itemXml:XML = xml.child("item")[i];
				if(isInStr(searchString,[email protected]())){   
					rawListShow.appendChild(itemXml);
				}
			}
		}

		//判断search_str是否在str内 
		public function isInStr(search_str:String , str:String):Boolean{    
			var num:int= str.indexOf(search_str);
			if(num>-1){
				return true;
			}else{
				return false;
			}
		}

		//展开树
		private function expandtree():void {
			for each(var item:XML in this.tree1.dataProvider)
			this.tree1.expandChildrenOf(item,true);
		}

	]]>
</fx:Script>
<fx:Declarations>
	<!-- 该例子由waylau.com提供-->
</fx:Declarations>
<s:TextInput prompt="请输入要搜索的字段"  x="10" y="10" 
			 change="textinput1_changeHandler(event)" id="textInput"/>
<mx:Tree id="tree1" dataProvider="{rawListShow}" 
		 labelField="@name" width="200" height="300" x="10" y="40">
</mx:Tree>

<s:Label text="更多例子 请关注  waylau.com" x="10" y="360"/>
</s:Application>