How to configure ProGuard to omit methods with SuppressWarnings("unused")

Question

I have methods that are used by Android framework ObjectAnimator instances. Hence they appear to be unused (they are used through reflection) and I add SuppressWarnings("unused") annotation, so IntelliJ don't show warnings for them. However, ProGuard still strips them and I need to explicitly tell him not to. This is tedious and seems redundant (violates DRY). Is it possible to configure ProGuard not to remove methods with SuppressWarnings("unused")?

Answer 1

Options that tell ProGuard to keep some classes and members (fields and methods) are described in the official documentation: http://proguard.sourceforge.net/manual/usage.html#keepoptions.

You can tell ProGuard to preserve class members using:

-keepclassmembers class_specification

Your class_specification will look like:

class * {
    @java.lang.SuppressWarnings <methods>;
}

So, in your proguard.cfg you should have something like this:

-keepclassmembers class * {
    @java.lang.SuppressWarnings <methods>;
}