Android proguard, keep inner class

Question

My android program has a class A, which has two static inner class. They are found to be stripped from .dex after applying proguard.

Answer 1

Most of the top answers does the job but they are using wildcard (*;) for adding everything which is not the accurate answer. Below configuration only adds the fields and method properties to preserve inner class methods.

-keepattributes Exceptions,InnerClasses,Signature, ...

# preserve class and nested classes' fields and methods
-keep class com.abc.package.clazzes.** {
    ;
    ;
}