Android - FirebaseApp / Firebase-Initialization is not starting

Question

I want to implement the Firebase-Messaging plugin into my Android-App. I've started with the "quickstart-android-master/messaging"-example from github: https://github.com/firebase/quickstart-android/tree/master/messaging

This works for me! Log-Output:

D/FirebaseApp﹕ com.google.firebase.auth.FirebaseAuth is not linked. Skipping initialization.
D/FirebaseApp﹕ Initialized class com.google.firebase.iid.FirebaseInstanceId.
D/FirebaseApp﹕ com.google.firebase.crash.FirebaseCrash is not linked. Skipping initialization
D/FirebaseApp﹕ Initialized class com.google.android.gms.measurement.AppMeasurement.
I/FirebaseInitProvider﹕ FirebaseApp initialization successful

But if I want to implement the Plugin "com.google.firebase:firebase-messaging:9.0.2" into my app, the FirebaseApp isn't initialized! So the FirebaseApp plugin isn't starting! - No Log or token received!

I've also added apply plugin to build.gradle file in "app"-directory:

    apply plugin: 'com.android.application'

android {
  // ...
}

dependencies {
  // ...
  compile 'com.google.firebase:firebase-messaging:9.0.2'
}

// ADD THIS AT THE BOTTOM
apply plugin: 'com.google.gms.google-services'

And the google-services plugin to build.gradle in the "root" directory:

buildscript {
    // ...
    dependencies {
        // ...
        classpath 'com.google.gms:google-services:3.0.0'
    }
}

Problems could be:

• AndroidAnnotations, Proguard, Product flavors...

Answer 1

My problem was the "Manifest Merger". If I use the

xmlns:tools="http://schemas.android.com/tools"

and

tools:node="replace"

in the Application Tag of the Manifest, the FirebaseApp will not be initialized!

If you use replace attr on tools:node it will replace your lower priority declaration with the annotated one (see more here). You should use merge or merge only attributes instead.

So what I've exactly done:

This doesn't work:

<application
            android:name="xxx"
            android:icon="@mipmap/ic_launcher"
            android:label="@string/application_name"
            android:theme="@style/Theme.TemplateStyle"
            tools:node="replace">

this works:

<application
            android:name="xxx"
            android:icon="@mipmap/ic_launcher"
            android:label="@string/application_name"
            android:theme="@style/Theme.TemplateStyle">
            <!-- tools:node="replace"-->

If you want to overwrite or replace some attributes, use tools:replace instead!