问AS3 - ByteArray转到位图

EN

        import mx.events.FlexEvent;

        public var _file:File;
        public var _stream:FileStream;
        public var _load:Loader;

        protected function init(event:FlexEvent):void {
            _file = File.desktopDirectory;
            _file.addEventListener( Event.SELECT, selectComplete);
            _file.browseForOpen( 'Image' );
        }
        private function selectComplete( event:Event ):void {
            _stream = new FileStream();
            _stream.addEventListener( Event.COMPLETE, loadComplete );
            _stream.openAsync( _file, FileMode.READ );
        }
        private function loadComplete( event:Event ):void {
            var ba:ByteArray = new ByteArray();
            _stream.readBytes( ba );
            _load = new Loader();
            _load.contentLoaderInfo.addEventListener( Event.COMPLETE, loadbytesComplete );
            _load.loadBytes( ba );
        }
        private function loadbytesComplete( event:Event ):void {
            var bit:Bitmap = _load.content as Bitmap;
            img.source = bit;
        }

import flash.display.Loader;
import flash.display.LoaderInfo;
import flash.events.Event;
import flash.display.BitmapData;
 
private function startLoad():void
{
  var loader:Loader = new Loader();
  loader.loadBytes(byteArray);
  loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loaderComplete);
}     

private function loaderComplete(event:Event):void
{
    var loaderInfo:LoaderInfo = LoaderInfo(event.target);
    var bitmapData:BitmapData = new BitmapData(loaderInfo.width, loaderInfo.height, false, 0xFFFFFF);
    bitmapData.draw(loaderInfo.loader);
    // result: bitmapData
}