将图像保存在手机上的SD卡上？

Question

我想确定保存图像的路径 .. \ DCIM

    import flash.display.MovieClip;
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.*;
    save_mc.addEventListener (MouseEvent.CLICK, ImageSave);
    var transparent:Boolean = true;
    var fillColor:Number = 0x00FFFFFF;
    function ImageSave (image:MouseEvent):void
    {
        newwind.visible = true;
        newwind.play();
        var myBitmapData:BitmapData = new BitmapData(flashmo_pic.getChildAt(0).width,flashmo_pic.getChildAt(0).height,transparent, fillColor);
        myBitmapData.draw (flashmo_pic.getChildAt(0));
        var jpgEncoder:JPGEncoder = new JPGEncoder();
        var imgByteData:ByteArray = jpgEncoder.encode(myBitmapData);
        file = new FileReference();
        var fileReference:FileReference=new FileReference();
        file.save (imgByteData, "box.jpg");
    }