Flex load Image from Network

在Flex中需要加载网络图片时(jpg,png,gif等)可以使用URLLoader的相关方法，具体代码如下：

<?xml version="1.0" encoding="utf-8"?><s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"    xmlns:s="library://ns.adobe.com/flex/spark"    xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" creationComplete="application1_creationCompleteHandler(event)"><fx:Script><![CDATA[import mx.controls.Image;import mx.events.CloseEvent;import mx.events.FlexEvent;import mx.managers.PopUpManager;import spark.components.Scroller;import spark.components.TitleWindow;import spark.components.VGroup;import spark.layouts.HorizontalLayout;private var imgWin:TitleWindow;private var urlLoader:URLLoader = new URLLoader();protected function application1_creationCompleteHandler(event:FlexEvent):void{var urlReq:URLRequest = new URLRequest("http://www.baidu.com/img/bdlogo.gif");urlLoader.dataFormat = URLLoaderDataFormat.BINARY;urlLoader.load(urlReq);urlLoader.addEventListener(Event.COMPLETE, completeHandler);}private function completeHandler(event:Event):void {var fileName:String = "远程图片";imgWin = new TitleWindow();var layout:HorizontalLayout = new HorizontalLayout();layout.horizontalAlign = "center";layout.verticalAlign = "middle";imgWin.layout = layout;imgWin.addEventListener(CloseEvent.CLOSE,function():void{PopUpManager.removePopUp(imgWin);});imgWin.width = 800;imgWin.height = 480;imgWin.title = fileName;var img:Image = new Image();img.source = urlLoader.data;//这里使用 img.load(urlLoader.data);也可以img.name = fileName;img.addEventListener(Event.COMPLETE,onImageLoadComplete);var scroller:Scroller = new Scroller();scroller.percentHeight = 100;scroller.percentWidth = 100;var g:VGroup = new VGroup();g.horizontalAlign = "center";g.verticalAlign = "middle";g.addElement(img);scroller.viewport = g;imgWin.addElement(scroller);}private function onImageLoadComplete(e:Event):void{var img:Image = e.currentTarget as Image;//Alert.show('img width:'+img.width+',height:'+img.height+','+img.contentWidth+","+img.contentHeight);imgWin.width = img.contentWidth <= 750 ? 800 : (img.contentWidth+50);imgWin.height = img.contentHeight <= 430 ? 480 : (img.contentHeight+50);//imgWin.title = img.name;PopUpManager.addPopUp(imgWin, this, true);PopUpManager.centerPopUp(imgWin);}]]></fx:Script><fx:Declarations><!-- Place non-visual elements (e.g., services, value objects) here --></fx:Declarations></s:Application>