It is possible that the apk file is infected with a virus?

Possible but highly improbable if you coded the app and created the apk.

More likely:

  • a coding issue regarding an endless loop or timing
  • app using too many device resources.
  • very large app with lots of arrangements, files, images etc.
  • something related to a Screen1.Initialize Block

or lots of other issues that can not be determined based on the information you provided.

You can check your apk here: