android - App crashes on production but not in development

Question

I just launched my brand new app on Google Play but its crashing when i try to open it. The thing is, it used to work just fine in development.

I have ProGuard enabled and i tried disabling it, generating the signed apk and manually installing it on a device.. but my app still won't open.

Since i have Crittercism enabled, after a few tries, i finally got a crash to be reported to the website, and it says:

Unable to start activity ComponentInfo{com.pizzapp.android/com.pizzapp.android.login.PAWelcomeActivity}: java.lang.RuntimeException: java.lang.NoSuchMethodException: a(Activity,int)

PAWelcomeActivity is my main activity!

my proguard-project.txt is like:

-keepattributes SourceFile, LineNumberTable, Exceptions, Signature, InnerClasses

-keep class com.newrelic.** { *; }
-keep class com.facebook.** { *; }
-keep class com.parse.** { *; }

-dontwarn com.newrelic.**

Does anybody have an idea what this crash is?

Thanks, Newton

Update 1:

Here you can see how my package is organised:

Answer 1

You are probably obfuscating the Activity lifecycle method names. Make sure not to do that.