jpeg - Android Create Custom Exif attributes for an image file

Question

currently i am trying to add custom exif tag/data to an image file that is in photo album.

I am able to modify the existing tags defined in ExifInterface class

However, i want to store custom data, such as user id of my app user, but it seems there is no way i can create a custom exif attribute

the closest solution I found is here, but does not work,

Answer 1

Try saving the Exif data with the tag:

"UserComment"

Code:

String mString = "Your message here";     
ExifInterface exif = new ExifInterface(path_of_your_jpeg_file);
exif.setAttribute("UserComment", mString);
exif.saveAttributes();

You can put anything you want in there (as String) and simply parse the string. I wish we could create and name our own exif tags, but the reality is that we can't. So this is the best solution I came up with.