1-) Android RMOS - imageView to base64

public String getBase64() {
    try {
        BitmapDrawable drawable = (BitmapDrawable) imageView2.getDrawable();
        Bitmap bitmap = drawable.getBitmap();

        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 90, stream);
        byte[] image = stream.toByteArray();
        //System.out.println("byte array:" + image);
        String resimm = Base64.encodeToString(image, 0);
        return resimm;
    } catch (Exception ex) {
        return "";
    }
}