Unity and Gradle build fails, after upgrading Firebase Analytics and Crashlytics to 6.16.0 (Program type already present: com.google.firebase.unity.BuildConfig )

[roointan]

[REQUIRED] Please fill in the following fields:

• Unity editor version: 2018.4.22f1
• Firebase Unity SDK version: 6.16.0
• Source you installed the SDK: .unitypackage (.unitypackage or Unity Package Manager)
• Problematic Firebase Component: build for android fails (Auth, Database, etc.)
• Other Firebase Components in use: Analytics, Crashlytics, Dynamic Links (Auth, Database, etc.)
• Additional SDKs you are using: Admob, Facebook, Onesignal (Facebook, AdMob, etc.)
• Platform you are using the Unity editor on: Mac (Mac, Windows, or Linux)
• Platform you are targeting: Android (iOS, Android, and/or desktop)
• Scripting Runtime: IL2CPP (Mono, and/or IL2CPP)

[REQUIRED] Please describe the issue here:

I tried upgrading old crashlytics from 6.13 to 6.16, then android build started to fail, with this message: Program type already present: com.google.firebase.unity.BuildConfig on something related to multidex

Solution:

I changed AndroidManifest.xml files for FirebaseApp.androidlib and FirebaseCrashlytics.androidlib
they both had package="com.google.firebase.unity"
I changed one to package="com.google.firebaseapp.unity" and the other to package="com.google.firebasecrashlytics.unity"

This solved the problem for me.
I shared it here so that maybe it helps somebody, or the developers to prevent this bug, and also to be sure this solution is not having a side effect.
Thanks.

[melih-veloxia]

We had the same issue on Unity 2019.4.10f1 right after upgrading Firebase Components to 6.16.0 from 6.15.2. Solution given has solved the problem.

Differently from the @roointan, we've installed and upgraded the SDK from Package Manager.

[roointan]

@melih-veloxia Happy this solved your problem, and happy it solved someone's problem so fast. I just posted this yesterday ;)

[simontgs]

thanks for fix, same, installed via packagemanager, multi-dex...trying the workaround otherwise we have to revert back

[a-maurice]

Thanks for raising this issue, along side the workaround. We will look into it on our end, and see if we can get a proper fix in.

[unadamlar]

Thanks for the fix, happened to me in 2019.3.0f3 when I upgraded Firebase from 6.8 to 6.16. Previous version was installed with .unitypackage, and I had migrated it to the Package Manager version

[chkuang-g]

Thanks for reporting this. And truly sorry this slipped through our release test.

This seems to plague any Unity version from 2019 and below, if you turn on Minify.

I have fixed this issue internally and will update this post when the release is available.