Flex中本地图片上传前的预览
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" fontSize="12" creationComplete="init()">
??? <mx:Script>
??????? <![CDATA[
??????????? import mx.utils.*;
??????????? import flash.net.*;
????????????
??????????? private var fileReference:FileReference=new FileReference();
??????????? private var byteArray:ByteArray;
??????????? private var bitmapData:BitmapData;
??????????? private var loader:Loader=new Loader();
??????????? private function init():void
??????????? {???????????????
??????????????? fileReference.addEventListener(Event.COMPLETE,fileReferenceCompleteHandler);
??????????? }
??????????? private function fileReferenceCompleteHandler(e:Event):void
??????????? {
??????????????? byteArray = fileReference.data;
??????????????? loader.contentLoaderInfo.addEventListener(Event.COMPLETE,loaderCompleteHandler);
??????????????? loader.loadBytes(byteArray);
??????????? }
??????????? private function loaderCompleteHandler(e:Event):void
??????????? {
??????????????? var bitmap:Bitmap = Bitmap(loader.content);
??????????????? bitmapData = bitmap.bitmapData;
??????????????? img.source = bitmap;
??????????? }
??????????? private function fileReferenceSelectHandler(e:Event):void
??????????? {
??????????????? fileReference.load();
??????????? }
??????????? private function btnClick():void
??????????? {
??????????????? fileReference.browse();
??????????????? fileReference.addEventListener(Event.SELECT,fileReferenceSelectHandler);
??????????? }
??????? ]]>
??? </mx:Script>
??? <mx:Panel width="456" height="345" horizontalCenter="0" verticalGap="0" horizontalAlign="center" verticalAlign="middle">
??????? <mx:Image id="img" width="263" height="234"/>
??????? <mx:Button label="选择..." click="btnClick()"/>
??? </mx:Panel>
</mx:Application>
