Audio File Field is empty (null) on drupalgap app
The problem was that the url of the source audio file was wrong. It happened after i deleted originalsong.mp3 and reuploaded it. So, system gave it new name originalsong_0.mp3 (Note the _0 at the end of the filename). Probably drupal keeps track of files uploaded even when they are deleted so when i upload same mp3 with same filename it gets _0, _1 etc.
Null object appears at www.example.com/mobile-application but when project is compiled and run in real Android device it works out of the box. Play button works but not Download button(minor problem for me).