title: How to programmatically read the date when my Android apk was built?
body: <p>Is it possible to programmatially read the date when my Android apk was built? I could not find anything in the PackageInfo class.</p>
  
  <p>I want to expire beta versions of my app and the easiest way would be to read out such a date and expire it after a fix preiode of days, so I don't have to update the code for that eavery time I build and deploy a beta version.</p>