How are the album thumbnails names made?

I am making a program that shows the album artworks of songs on my device. To do this, I get the folder that contains those album thumbnails (/storage/emulated/0/Android/data/com.android.providers.media/albumthumbs) but the name of the thumbnails contained in that folder make no sens to me. For example, the name of all album thumbnails have this format: 1354042503656. The names of the files have no extension, are made with 13 numbers and all starts with 1354.

Does someone know what it means? I would like to associate the names of the album thumbnails with the appropriate album in my application.

Thanks!

Solution

After looking into the source code of android, I found the method that is setting the names of those thumbnails. source code at line 3575. the thumbnails names are made like so String name = String.valueOf(System.currentTimeMillis());

So it is impossible to match albums in my application and the names in the folder :(.

hope it helps!