Adding Firebase Crashlytics either crash in runtime or fail unit test build

Question

I'm trying to add Firebase Crashlytics to a new Android app (single module, no flavors). Since Crashlytics is missing from the IDE assistant plugin, I'm using setup steps from https://firebase.google.com/docs/crashlytics/get-started:

• add gradle dependencies
• download google-services.json and put it in the /app root

Crashlytics is initialized for release builds only like this:

class MyApplication: Application() {

  fun onCreate() {
    super.onCreate()
    Fabric.with(
        this,
        Crashlytics.Builder()
            .core(CrashlyticsCore.Builder().disabled(BuildConfig.DEBUG).build())
            .build()
    )
  }
}

The problem #1: app crashes during initialization with

java.lang.RuntimeException: Unable to get provider com.crashlytics.android.CrashlyticsInitProvider: io.fabric.sdk.android.services.concurrency.UnmetDependencyException: The Crashlytics build ID is missing. This occurs when Crashlytics tooling is absent from your app's build configuration. Please review Crashlytics onboarding instructions and ensure you have a valid Crashlytics account.

Adding

<meta-data
  android:name="io.fabric.ApiKey"
  android:value="{blah-blah-key}" />

to AndroidManifest.xml fixes the issue (I'm seeing crashes in firebase console), but now I'm getting

Problem #2: running unit tests (gradle test) fails with

> Task :app:fabricGenerateResourcesRelease FAILED
ERROR - Crashlytics Developer Tools error.
java.lang.IllegalArgumentException: Crashlytics found an invalid API key: blah-blah-key

TL;DR - gradle fails to run unit tests if Fabric api key is present in manifest, app crashes in runtime if it's not present. I suspect that I'm doing something wrong, but not sure what exactly :(

Answer 1

I had a similar problem.

java.lang.RuntimeException: Unable to get provider com.crashlytics.android.CrashlyticsInitProvider: io.fabric.sdk.android.services.concurrency.UnmetDependencyException: The Crashlytics build ID is missing. This occurs when Crashlytics tooling is absent from your app's build configuration. Please review Crashlytics onboarding instructions and ensure you have a valid Crashlytics account.
        at android.app.ActivityThread.installProvider(ActivityThread.java:6288)

In my case it was because I forgot to add apply plugin: 'io.fabric' in /app/build.gradle

I did everything exactly according to the instructions and my application was able to send reports to Crashlytics. And I didn't add a io.fabric.ApiKey.

Answer 2

Well in my case:

classpath 'com.google.firebase:firebase-crashlytics-gradle:2.0.0-beta01'

was missing in project level build.gradle and

apply plugin: 'com.google.firebase.crashlytics'

was missing in the app-level build.gradle file