InitializationException in Unity Firebase

Question

I have a problem with Firebase in my Unity project. Firebase SDK was imported in the project, builded, no errors during this process.

SHA-1 key was generated with a keytool and added to Firebase project in the console.

google-services.json was also added to the Assets folder.

Simple script to initialize Firebase:

DependencyStatus dependencyStatus = DependencyStatus.UnavailableOther;
// Use this for initialization
void Start () 
{
    Debug.Log ("Start FireBase");
    dependencyStatus = FirebaseApp.CheckDependencies();

    if (dependencyStatus != DependencyStatus.Available) 
    {
        FirebaseApp.FixDependenciesAsync().ContinueWith(task => 
        {
            dependencyStatus = FirebaseApp.CheckDependencies();
            if (dependencyStatus == DependencyStatus.Available) 
            {
                InitializeFirebase();
            } 
            else 
            {
                Debug.LogError("Could not resolve all Firebase dependencies: " + dependencyStatus);
            }
        });
    } 
    else 
    {
        InitializeFirebase();
    }
}

void InitializeFirebase() 
{
    FirebaseAnalytic.Instance().setAnalyticsCollectionEnabled(true);
    FirebaseAnalytic.Instance().setUserProperty(FirebaseAnalytics.UserPropertySignUpMethod, "Google");
    FirebaseAnalytic.Instance().setUserId(SystemInfo.deviceUniqueIdentifier);
    FirebaseAnalytic.Instance().logEvent("LogIn", FirebaseAnalytics.EventLogin);
    Debug.Log ("FirebaseAnalytics Logined");
}

So app builds and runs without crashes. But through adb logcat -s Unity I can see the following:

I/Unity   (27030): Start FireBase

I/Unity   (27030): (Filename: ./artifacts/generated/common/runtime/UnityEngineDebugBindings.gen.cpp Line: 42)
I/Unity   (27030):

I/Unity   (27030): Firebase App initializing app com.boldstatementproductions.mcpro (default 1).

I/Unity   (27030): (Filename: ./artifacts/generated/common/runtime/UnityEngineDebugBindings.gen.cpp Line: 42)
I/Unity   (27030):

W/Unity   (27030): Callback module already shut down

W/Unity   (27030): (Filename: ./artifacts/generated/common/runtime/UnityEngineDebugBindings.gen.cpp Line: 42)

E/Unity   (27030): java_app

E/Unity   (27030): (Filename: ./artifacts/generated/common/runtime/UnityEngineDebugBindings.gen.cpp Line: 42)

I/Unity   (27030): Firebase App initializing app com.boldstatementproductions.mcpro (default 1).

I/Unity   (27030): (Filename: ./artifacts/generated/common/runtime/UnityEngineDebugBindings.gen.cpp Line: 42)

W/Unity   (27030): Callback module already shut down

W/Unity   (27030): (Filename: ./artifacts/generated/common/runtime/UnityEngineDebugBindings.gen.cpp Line: 42)

E/Unity   (27030): java_app

E/Unity   (27030): (Filename: ./artifacts/generated/common/runtime/UnityEngineDebugBindings.gen.cpp Line: 42)

I/Unity   (27030): InitializationException: Failed to initialize the default Firebase App.

I/Unity   (27030):   at Firebase.FirebaseApp.CreateAndTrack (Firebase.CreateDelegate createDelegate) [0x00000] in <filename unknown>:0

I/Unity   (27030):   at Firebase.FirebaseApp.Create () [0x00000] in <filename unknown>:0

I/Unity   (27030):   at Firebase.FirebaseApp.get_DefaultInstance () [0x00000] in <filename unknown>:0

I/Unity   (27030):   at Firebase.Analytics.FirebaseAnalytics..cctor () [0x00000] in <filename unknown>:0

I/Unity   (27030): Rethrow as TypeInitializationException: An exception was thrown by the type initializer for Firebase.Analytics.FirebaseAnalytics

I/Unity   (27030):   at FirebaseDependencyResolver.InitializeFirebase () [0x00000] in <filename unknown>:0

I/Unity   (27030):   at FirebaseDependencyResolver.Start () [0x00000] in <filename unknown>:0

I/Unity   (27030): (Filename:  Line: -1)

Googling any of those messages didn't help very much. What am I missing? I followed Firebase setup tutorial for Unity step-by-step. This error terrorised me for a week already!

Answer 1

So, after 1245321653214th attempt to reimport Firebase and to resolve this issue anyhow we discovered that previously the other plugin, Admob, overwrote some libraries that Firebase uses.

We removed all aars and jars both Firebase and Admob may use and firstly reimported Firebase and then, selectively, Admob. The main rule is not to allow Admob overwrite any files Firebase uses, for example "play-services-blah-blah.aar".

Main piece of advice in this post is not to hurry with importing plugins: import one, configure, build, check if it works (10 times), commit, import the seconds one and so on.. This way you'll clearly see if 3rd parties have confilcts between them.

If you are already in the mess, you should better delete all 3rd parties and start from scratch.

So, be VEEERY careful with files similar to those on the image below.

Hope this helps people to prevent problems we had.