id is missing in my R.java file when working with arcgis project

Question

I was developing arcgis project application by Android and everything was working properly until yesterday.whenever I create a new Android application project and check the R.java file id is there but when I create a new arcgis project for android the R.java is missing id.I don't think it's my adb b/c this happens for the arcgis project only.so can anyone help me

Answer 1

1. Check if you have it import
   2.Synchronized file R.class
   3.Run android studio as administrator

   Or R cannot be resolved - Android error