I am using Proguard and in my app I use this code
System.out.println("ACTIVITY NAME IS " + activity.getLocalClassName());
It prints out the Activity name out, Iin release mode. I thought it is suppose to obfuscate all class names?
Is this behavior normal?
Yes this is a normal behaviour. Activity names are never obfuscated because these are referenced in manifest.xml. and android access these activities via reflection so their names cannot be changed. check this link https://stackoverflow.com/a/20620108/1320616