java.lang.IllegalStateException: Must Initialize Fabric before using singleton()

Question

I have found glitch in crashlytics/fabric initialization. As Mike from crashlytics suggests here: how to initialize new fabric we should use:

Fabric.with(this, CrashlyticsCore.getInstance());

But when i switched to androidX it started crashing with:

Must Initialize Fabric before using singleton()

Some of my main settings is:

compileSdkVersion 29
targetSdkVersion 29
io.fabric.tools:gradle:1.28.1
gradle: 5.5.1
com.crashlytics.sdk.android:crashlytics:2.10.0@aar

In onCreate in my Application class:

@Override
public void onCreate() {
    super.onCreate();
    Fabric.with(this, CrashlyticsCore.getInstance());
}

Of course i have metadata in manifest:

<meta-data
    android:name="io.fabric.ApiKey"
    android:value="myKey"/>

Your application is added in Manifest? – Cătălin Florescu Jul 18 '19 at 10:43 — Cătălin Florescu, Jul 18 '19 at 10:43
@FlorescuCătălin yes. – Kebab Krabby Jul 18 '19 at 11:52 — Kebab Krabby, Jul 18 '19 at 11:52

Kebab Krabby · Answer 1 · 2019-07-18T12:23:30.603

1

This initialization works like a charm without any problems.

Fabric.with(this, new CrashlyticsCore(), new Crashlytics());

But i dont understand why the newer fails.

edited Jul 18 '19 at 12:23

answered Jul 18 '19 at 10:37

Kebab Krabby

1,574
13
21

Birju Vachhani · Answer 2 · 2019-07-21T15:52:40.733

1

In case you haven't register your app in manifest file, Try this:

In your AndroidManifest.xml:

<application
    android:name=".MyApplication"
    ...
    />

And try initializing like this:

public class MyApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        val core = CrashlyticsCore.Builder().disabled(false).build()
        Fabric.with(this, Crashlytics.Builder().core(core).build())
    }
}

This is what I use in my projects and it works perfectly!

edited Jul 21 '19 at 15:52

answered Jul 21 '19 at 14:57

Birju Vachhani

6,072
4
21
43

My application class is added in manifest. Glitch is that one implementation works and second one does not. – Kebab Krabby Jul 21 '19 at 15:36
Maybe you should try initializing like this: Check my updated answer. @KebabKrabby – Birju Vachhani Jul 21 '19 at 15:40
Thats outdated initialization according to link in the description. – Kebab Krabby Jul 21 '19 at 15:43

score 1 · Answer 3 · answered Jul 24 '19 at 18:41

Mike's answer is incorrect from that link. When you use below initialisation

Fabric.with(this, CrashlyticsCore.getInstance());

CrashlyticsCore.getInstance() this getInstance method is trying to access Fabric class object which hasn't been created. Fabric object is created in with method which will be called once CrashlyticsCore.getInstance()is executed

Solution :

You can use any of below lines for initialisation since they're creating all objects using new keyword

Fabric.with(this, new Crashlytics());
Fabric.with(this, new CrashlyticsCore());
Fabric.with(this, new CrashlyticsCore(), new Crashlytics())

java.lang.IllegalStateException: Must Initialize Fabric before using singleton()

3 Answers3