Error Proguard Unsupported class version number

Question

I get always this erroe when I try to obfuscate an App with proguard

Error:ProGuard: [MyApp] java.io.IOException: Can\'t read [C:\\Program Files\\Java\\jdk1.         


        

Answer 1

Seems that Proguard doesn't support Java 8 actually. You have to use JDK version 7.

EDIT-1

I have recompiled Proguard to support JDK 8 classes, doesn't support Java 8 new features but if your code doesn't use Java 8 new syntax(e.g. Lambda Expression) should works without problems. Tested with some android projects.

To use replace the file proguard.jar in

android-sdk\tools\proguard\ 

with the content of THIS ARCHIVE

EDIT-2

Recently has been released the official Proguard 5 that should address the issue. You can download this from HERE