Keep specific Annotation with proguard

问题

I have two types of annotation in my project: Annotation1 and Annotation2. Both are runtime annotations. So, my question is how to keep only Annotation1 and strip Annotation2 ? I can not find is it possible. If not, I can not get - why ?

Example:

class Test {
    @Annotation1
    @Annotation2
    String name;
}

I want Annotation2 being removed from all fields and Annotation1 being kept everywhere.

回答1:

ProGuard automatically removes annotations from the classes/fields/methods if the corresponding annotation classes are not used (retrieved, cast, invoked,...) elsewhere. You can't force ProGuard to remove annotations, but you can tell it to keep seemingly unused annotations:

-keep @interface com.example.MyAnnotation

回答2:

Obfuscation is compile-time process, Ideally I would suggest not to obfuscate any annotation, but still if you want to this should solve your problem.

-keep class Annotation1

in case you want to retain members you can use below code

 -keep class Annotation1{*;}

来源：https://stackoverflow.com/questions/47515093/keep-specific-annotation-with-proguard