Android studio warning - InnerClass annotations are missing corresponding EnclosingMember annotations

Question

I recently upgraded to Android Studio 3.1 and upon building my Kotlin with Java project I got the following warning.

InnerClass annotations are missing c

Answer 1

To fix the issue temporarily, I am adding this:

buildTypes {
    release {
        lintOptions {
            checkReleaseBuilds false
            abortOnError false
        }
    }
}

Will update if I find a permanent fix. This page for configuring JUnit 5 may also help

Answer 2

It may because some annotations be confused, so just add proguard rule:

-keepattributes *Annotation*
-keep @**annotation** class * {*;}

it worked fine to me.