android studio 3.1 Warning: The rule `-keep public class *extends java.lang.annotation.Annotation {

Question

i recently upgraded android studio but im not able to find the source of the following issue reported in android studio 3.1:

Warning: The rule `-keep public clas         


        

Answer 1

In my case the warning appeared after changing Gradle version. Once I invalidated cache & restarted Android Studio the warning disappeared.

From the menu: File > Invalidate caches & restart

invalidate caches & restart