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

I got same issue because of "multiDexEnabled true" setting in gradle defaultConfig.

I resolved this issue by adding multidex dependency "implementation 'com.android.support:multidex:1.0.3'"

android {
defaultConfig {
    ...
    multiDexEnabled true
}
...
}

dependencies {
  implementation 'com.android.support:multidex:1.0.3'
}

Reference : https://developer.android.com/studio/build/multidex