Fabric Crashlytics reports display some letters instead of classes names of my Android App

Question

In Fabric Crashlytics reports I see some letters instead of classes names. for example when I see "MainActivity" I understand that a crash occured in MainActivity.java, but now I see letter "a" , "e" or "w" instead of class name and I can't understand in which class that crash occured!

How can I solve this problem?

Shylashylock

In your gradle file do you use proguard obfuscation ?? – Hoopla

@Fakher: Yes, I do. I'm checking out MadScientist's Answer. I think I got it. – Shylashylock

Answer 1

Possibly you're using proguard or dexguard to obfuscate your code, hence when crashlytics reports it, it reports it with symbols instead of actual method and class names.

1. if you wish to use proguard with crashlytics, follow this doc here to add the necessary proguard rules or simple exclude proguard on crashlytics by adding the following to your proguard-rules file:

   -keep class com.crashlytics.** { *; }
   -dontwarn com.crashlytics.**
   

would recommend adding all the rules mentioned there for better stability.

2. if you do not know what proguard is or wish not to use it, go to your build.gradle file for app and change the line to:

   minifyEnabled false
   

Happy coding!

Resplendent

Yes I'm using proguard to obfuscate my code. Your first soloution solved my problem. – Shylashylock

Have you followed this link ? It has some more useful info – Whoever

@RenatoAlmeida: Mr. MadScientist's Answer contains this link, too. It was useful. – Shylashylock

minifyEnabled false perfect you just digged a whole and buried decades worth effort of making an app secure – Otero

Anyone looking for firebase docs, it is here (not the fabric docs, which are now deprecated) – Grous

Answer 2

You must upload your mapping file for your obfuscatated code. In that way the stack trace will be de obfiscated. This is the official documentation

Hoopla

Crashlytics automatically does that, you can see it in this link – Whoever

@Hoopla you're linking to the documentation of Google Play. The question is about Fabric's Crashlytics. – Disciplinant