Android Proguard using getting signin apk Errors

Question

Why this error comming,how to solve this,,anyone give default proguard rules have send me..

Note: there were 3 references to unknown classes. You should check your configuration for typos. ( http://proguard.sourceforge.net/manual/troubleshooting.html#unknownclass ) Note: there were 22 unkept descriptor classes in kept class members. You should consider explicitly keeping the mentioned classes (using '-keep'). ( http://proguard.sourceforge.net/manual/troubleshooting.html#descriptorclass ) Warning: there were 2 unresolved references to program class members. Your input classes appear to be inconsistent. You may need to recompile the code. ( http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedprogramclassmember ) Warning: Exception while processing task java.io.IOException: Please correct the above warnings first. Thread(Tasks limiter_1): destruction :app:transformClassesAndResourcesWithProguardForRelease FAILED

FAILURE: Build failed with an exception.

• What went wrong: Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'.

  Job failed, see logs for details

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 57s 23 actionable tasks: 22 executed, 1 up-to-date

Answer 1

If you see details in your error log you will get the missing library. I have added below line in progourd.cfg for my project for a similar type of error while generating signed apk.

-dontwarn com.google.**