flex添加 播放 gif图片

初学flex遇到加载gif问题，翻遍网络（由于google被封）找不到解决方法。总结整理后得到如下方法解决：

Flex里Image控件插入gif动画的图片默认只显示一帧，也就是说是不会动的，我们可以借助GifPlayer类包来实现Flex里插入动画的Gif图片。

GifPlayer下载:http://download.csdn.net/detail/d294083434/9432178，如图，提取org文件夹并放在程序目录src下面就可以了。

实例一：简单添加gif

 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">
     <fx:Script>

         import org.bytearray.gif.player.GIFPlayer;

         private var gifPlay:GIFPlayer=new GIFPlayer();
         private function init():void{
         var req:URLRequest=new URLRequest("../flex_src/images/复件-雨量图标.gif");
         gifPlay.load(req);
         gifImg.addChild(gifPlay);
         }
         ]]>
     fx:Script>
     <mx:TitleWindow title="abc" id="ADwindow" width="1000" height="800" >
         <mx:Image id="gifImg" width="221" height="92" creationComplete="init()"/>
      mx:TitleWindow>
 s:Application>

实例二：演示了几个常用的功能:播放、停止、到第几帧播放、到第几帧停止。

 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="init()">
     <fx:Script>

             import flash.net.URLRequest;
             import org.bytearray.gif.player.GIFPlayer;
             import org.bytearray.gif.events.FileTypeEvent;
             import org.bytearray.gif.events.GIFPlayerEvent;
             import org.bytearray.gif.events.FrameEvent;
             import org.bytearray.gif.events.TimeoutEvent;
             private var _myGIFPlayer:GIFPlayer = new GIFPlayer();//实例化GIFPlayer实例
             private var _totalFrame:Number;//总帧数
             //private var _currentFrame:Number;

             private function init():void
             {
                 var request:URLRequest = new URLRequest("../flex_src/images/复件-雨量图标.gif");//同级目录下得md.gif图片
                 _myGIFPlayer.load(request);
                 img.addChild(_myGIFPlayer);//img控件添加播放
                 _myGIFPlayer.addEventListener(GIFPlayerEvent.COMPLETE, onCompleteGIF);//载入gif图片完毕时的回调函数
                 _myGIFPlayer.addEventListener(FrameEvent.FRAME_RENDERED, onFrameRendered);//读取帧的回调函数
                 //_myGIFPlayer.addEventListener(TimeoutEvent.TIME_OUT, onTimeOut);
             }

             private function onCompleteGIF(event:GIFPlayerEvent):void
             {
                 _totalFrame = _myGIFPlayer.totalFrames;//总帧数
                 totalframe.text = String(_totalFrame);
             }

             private function onFrameRendered(event:FrameEvent):void
             {
                 currentframe.text = String(_myGIFPlayer.currentFrame);//当前播放的帧数
             }

             private function onTimeOut(event:TimeoutEvent):void
             {
                 trace ("gif is error!");
             }

             private function play():void
             {
                 _myGIFPlayer.play();
             }

             private function stop():void
             {
                 _myGIFPlayer.stop();
             }

             private function gotoandplay():void
             {
                 var numFrame:Number = Math.floor(Math.random() * _totalFrame ) + 1;
                 _myGIFPlayer.gotoAndPlay(numFrame);
                 gotoplaybtn.label = "gotoPlay(" + numFrame + ")";
             }

             private function gotoandstop():void
             {
                 var numFrame:Number = Math.floor(Math.random() * _totalFrame ) + 1;
                 _myGIFPlayer.gotoAndStop(numFrame);
                 gotostopbtn.label = "gotoStop(" + numFrame + ")";
             }

         ]]>
     fx:Script>
     <s:layout>
         <s:BasicLayout/>
     s:layout>
     <fx:Declarations>

     fx:Declarations>
     <mx:Image id="img" width="217" height="300" top="30" left="240"/>

     <mx:ApplicationControlBar width="80%" bottom="20" horizontalCenter="0">
         <mx:Button label="Play" height="22" click="play();" styleName="primaryButton" />
         <mx:Button label="Stop" height="22" click="stop();" />
         <mx:Button id="gotoplaybtn" height="22" label="gotoPlay(rand)" click="gotoandplay();" />
         <mx:Button id="gotostopbtn" height="22" label="gotoStop(rand)" click="gotoandstop();" />
         <mx:Label text="TotalFrame:" />
         <mx:Label id="totalframe" />
         <mx:Label text="CurrentFrame:" />
         <mx:Label id="currentframe" />
     mx:ApplicationControlBar>
 s:Application>