Why can meta information be lost in a bitmap?

Question

Java

New to android.
The task is this: take an image by uri, resize it to reasonable sections, and send it to the server.
I came across such a moment that meta information is lost during resizing (well, or somewhere around). look pliz more experienced comrades, what's the jamb?

is = cr.openInputStream(uri);
                Bitmap bm = BitmapFactory.decodeStream(is);
                bm = scaleImage(bm, 2000, false);
                ByteArrayOutputStream stream = new ByteArrayOutputStream();
                bm.compress(Bitmap.CompressFormat.PNG, 100, stream);
                byteArray = stream.toByteArray();
                // Потом прикрепляю этот массив к AsyncHttpClient
                params.put("image", new ByteArrayInputStream(byteArray));

Next is a function from the open spaces, it should resize the image

public static Bitmap scaleImage(Bitmap realImage, float maxImageSize,
                                   boolean filter) {
        float ratio = Math.min(
                (float) maxImageSize / realImage.getWidth(),
                (float) maxImageSize / realImage.getHeight());

        int width = Math.round((float) ratio * realImage.getWidth());
        int height = Math.round((float) ratio * realImage.getHeight());

        Bitmap newBitmap = Bitmap.createScaledBitmap(realImage, width,
                height, filter);

        return newBitmap;
    }

But the server receives a file without meta information. Google provides no information. Poke your nose pliz, where is the meta information lost?

Answer 1

Because this is not a resize of an existing image, but the creation of a new one, based on the old one. Those. the meta-information remained in the original image, and no one copied it into the new bitmap.