Question

在我的AIR应用程序中，用户可以拍摄照片（来自CameraRoll或CameraUI）并将其保存到服务器。

有没有办法自动调整图像大小（800x600）以获得更轻的文件？

这是我的代码：

    var now:Date = new Date();
    var saveDirectory:String= "MyApp/PhotoUploads";
    var fileName:String = "MyPhoto" + now.fullYear + now.month + now.day + now.hours + now.minutes + now.seconds + ".jpg";
    var photoFile:File=File.documentsDirectory.resolvePath(saveDirectory+"/"+ fileName);

 function imageSelected( event:MediaEvent ):void{
    var mp:MediaPromise = event.data;

dataSource = mp.open();
 readMediaData();
}


function readMediaData():void{

    var imageBytes:ByteArray = new ByteArray();
     dataSource.readBytes( imageBytes );
    var stream:FileStream = new FileStream();
    stream.addEventListener( Event.CLOSE,photoFileSaved);
    stream.openAsync( photoFile,FileMode.WRITE); 
    stream.writeBytes( imageBytes );
    stream.close();
    }    

 function photoFileSaved(evt:Event):void{
     photoUpload();
 }

 function photoUpload():void{
     photoFile.upload( req );
     photoFile.addEventListener( ProgressEvent.PROGRESS, progress_func );
     photoFile.addEventListener( IOErrorEvent.IO_ERROR, ioErrorMedia );
     photoFile.addEventListener( Event.COMPLETE, complete_func );
 }

显然我无法做到：

mp.width = 200;
mp.height= 200;

那我怎么能这样做？

如何在上传之前调整图像大小？

1 个答案: