Convery byte array to Image and back issue

[shop.servic...@gmail.com]

If you are experiencing an issue please mention the full platform your issue applies to:
IDE: NetBeans/Eclipse/IDEA Netbeans 8.2
Desktop OS Windows 10 Pro
Simulator Latest

Device PC, Android, IOS

I am strugling to convert Image to bytes and back in my Mobile app.

General question is the approach to convert bytes to com.codename1.ui.Image and back

Currently I use:

custPhotoBytes.length = 26489

Image CustomerPicture = Image.createImage(custPhotoBytes, 0, custPhotoBytes.length);

inc.getBytesFromImage(CustomerPicture).length = 26471

byte[] imgBytes = inc.getBytesFromImage(A3CustomerPhotoImageViewer.getImage());

imgBytes .length = 26471

conversion dif of 18 bytes. Why?

    public byte[] getBytesFromImage(com.codename1.ui.Image image) {
        EncodedImage img = null;

        try {
            img = createFromImage(image, true);
        } catch (Exception e) {
        }
        return img != null ? img.getImageData() : new byte[0];
    }

Is there a better approach?

Thanks in advance.

Regards

[Shai Almog]

You are re-encoding the image. Different image encoders will produce different results, since we use the native facility for image encoding you'll get different results on iOS, Android, simulator etc.

If the image is an EncodedImage just use getData() to get the encoded bytes.

[shop.servic...@gmail.com]

I am using getImageData(), I don't see a getData() method.

Your thoughts on the best approach to read in bytes into an Image that I can display

Then when the user bails from this module we convert back to bytes and compare against original bytes (If different then we savechanged data)

Thoughts?

Regards

[Shai Almog]

That's a method of EncodedImage, check how you create/load the image.

[shop.servic...@gmail.com]

Good point.

I am using ImageViewer to Display pics. ImageViewer only accepts Image objects.

Converting Image to bytes and back are not reliable.

However EncodedImage in place of Image does work.

EncodedImage.createFromImage(viewer.getImage(),false)

Thanks.

Regards