Gradle Build failed with ProGuard enabled, missing classes.jar

Question

I'm getting the following error when trying to build a signed APK with ProGuard enabled:

Error:Execution failed for task ':app:packageRelease'. Unable to compute hash of D:\\Work\\Android\\MyApp\\app\\build\\intermediates\\classes-proguard\\release\\classes.jar

I checked the path given, and there is no classes.jar file. Where can I get the .jar from?

Answer 1

Check this question or just add

-keep public class com.google.android.gms.**

to your proguard rules.

Answer 2

Add these to your proguard-project.txt If you are using support libraries.

-dontwarn android.support.v7.**
-keep class android.support.v7.** { *; }
-keep interface android.support.v7.** { *; }

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