package{        import flash.display.Bitmap;        import flash.display.Sprite;        import flash.events.Event;        import flash.external.ExternalInterface;        import flash.geom.Rectangle;        import flash.system.MessageChannel;        import flash.system.Worker;        import flash.system.WorkerDomain;        import flash.utils.ByteArray;public class WorkerTest extends Sprite       {               protected var mainToWorker:MessageChannel;               protected var workerToMain:MessageChannel;                             protected var worker:Worker;                            [ Embed(source= "1.jpg")]               public var Image1:Class;                             public function WorkerTest()              {                      /**                      * Start Main thread                      **/                      if(Worker.current.isPrimordial){                            //Create worker from our own loaderInfo.bytes                           worker = WorkerDomain.current.createWorker(this.loaderInfo.bytes);                                                       //Create messaging channels for 2-way messaging                           mainToWorker = Worker.current.createMessageChannel(worker);                           workerToMain = worker.createMessageChannel(Worker.current);                                                       var byteArray:ByteArray = Bitmap(new Image1()).bitmapData.getPixels(new Rectangle(0,0,300,300));                           byteArray. shareable = true;        //使bytearray可以在两个线程中使用                                                       //Inject messaging channels as a shared property                           worker.setSharedProperty( "data", byteArray);                                                       //Listen to the response from our worker                           workerToMain.addEventListener(Event.CHANNEL_MESSAGE, onWorkerToMain);                                                       //Start worker (re-run document class)                           worker.start();                                                }                      /**                      * Start Worker thread                      **/                      else {                                                       //Inside of our worker, we can use static methods to                            //access the shared messgaeChannel‘s                            var data:ByteArray = Worker.current.getSharedProperty( "data");                           workerToMain = Worker.current.getSharedProperty( "workerToMain" );                           
　　　　　　　　　　　　　　　　//这里可以做一些压缩的工作
　　　　　　　　　　　　　　　　data.compress();                           workerToMain.send(data);　　//只要byteArray是shareable的，可以直接send                                                }              }              //Messages to the worker thread               protected function onWorkerToMain(event:Event): void {                      //Trace out whatever message the worker has sent us.                      var a:* = workerToMain.receive();                      trace("[Worker] " + a);                     ExternalInterface.call( "alert", a);     //debug版Flashbuilder4.6运行会收不到消息，但release版或断开debug连接就没问题              }       }}