java.lang.NoClassDefFoundError: com.google.firebase.FirebaseOptions

[Sanket Berde via StackOverflow]

I was getting this weird error on my google developer console. So i used google Cloud Test Lab to See whats really happening. turns out my app is failing on almost all devices

FATAL EXCEPTION: main
 Process: com.blackcurrantapps.iamin, PID: 16706
 java.lang.NoClassDefFoundError: com.google.firebase.FirebaseOptions
    at com.google.firebase.FirebaseApp.zzbu(Unknown Source)
    at com.google.firebase.provider.FirebaseInitProvider.onCreate(Unknown Source)
    at android.content.ContentProvider.attachInfo(ContentProvider.java:1591)
    at android.content.ContentProvider.attachInfo(ContentProvider.java:1562)
    at com.google.firebase.provider.FirebaseInitProvider.attachInfo(Unknown Source)
    at android.app.ActivityThread.installProvider(ActivityThread.java:4871)
    at android.app.ActivityThread.installContentProviders(ActivityThread.java:4466)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4406)
    at android.app.ActivityThread.access$1500(ActivityThread.java:139)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1270)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5102)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
    at dalvik.system.NativeStart.main(Native Method)

Here is a screenshot of the Test.

Now Here's the funny part, I dont even use Firebase in my app at all. There is no reference to the word "Firebase" when i do a find in path on my entire application. I Do use google cloud services, login and Google app engine though.

Here's my build.gradle file:

buildscript {
    repositories {
        maven { url 'https://maven.fabric.io/public' }
    }

    dependencies {
        classpath 'io.fabric.tools:gradle:1.+'
    }
}
apply plugin: 'com.android.application'
apply plugin: 'io.fabric'
apply plugin: 'com.google.gms.google-services'

android {
    compileSdkVersion 23
    buildToolsVersion '23.0.2'

    defaultConfig {
        applicationId "com.blackcurrantapps.iamin"
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 11
        versionName "Fixed Check in Bug"
        multiDexEnabled = true
    }
    buildTypes {
        release {
            shrinkResources true
//            minifyEnabled true
//            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    packagingOptions {
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/NOTICE'
    }
    dexOptions {
        javaMaxHeapSize "4g"
    }
}
repositories {
    maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
    maven { url "https://oss.sonatype.org/content/groups/public/" }
    maven { url "https://jitpack.io" }
    maven { url 'https://maven.fabric.io/public' }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])

    compile('com.mikepenz:materialdrawer:4.5.8@aar') {
        transitive = true
    }

    compile 'com.mikepenz:google-material-typeface:1.2.0.1@aar' //Google Material Design Icons
    compile 'com.mikepenz:fontawesome-typeface:4.4.0.1@aar'

    compile('com.vincentbrison.openlibraries.android:dualcache:2.2.2@jar') {
        transitive = true;
    }

    compile project(':htmlDialog')
    compile('com.twitter.sdk.android:twitter:1.8.0@aar') {
        transitive = true;
    }
    compile 'com.android.support:palette-v7:23.4.0'
    compile 'com.android.support:multidex:1.0.1'
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'com.android.support:design:23.4.0'
    compile 'com.google.android.gms:play-services-maps:9.0.0'
    compile 'com.google.android.gms:play-services-gcm:9.0.0'
    compile 'com.google.android.gms:play-services-identity:9.0.0'
    compile 'com.google.android.gms:play-services-base:9.0.0'
    compile 'com.google.android.gms:play-services-plus:9.0.0'
    compile 'com.google.android.gms:play-services-analytics:9.0.0'
    compile 'com.google.android.gms:play-services-location:9.0.0'
    compile 'com.android.support:cardview-v7:23.4.0'
    compile 'com.rengwuxian.materialedittext:library:2.1.3'
    compile 'com.twotoasters.jazzylistview:library:1.2.1'
    compile 'com.twotoasters.jazzylistview:library-recyclerview:1.2.1'
    compile 'com.pnikosis:materialish-progress:1.7'
    compile 'com.getbase:floatingactionbutton:1.10.1'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.squareup.okhttp:okhttp:2.6.0'
    compile 'me.dm7.barcodescanner:zbar:1.8.3'
    compile 'net.glxn.qrgen:android:2.0'
    compile 'com.edmodo:cropper:1.0.1'
    compile 'com.github.PhilJay:MPAndroidChart:v2.1.6'
    compile 'de.greenrobot:eventbus:2.4.0'
    compile 'com.android.support:support-v4:23.4.0'
    compile 'com.pavelsikun:material-seekbar-preference:0.12.1+'

    compile project(path: ':backend', configuration: 'android-endpoints')
}

Can anyone help me out here ?

Please DO NOT REPLY directly to this email but go to StackOverflow:
http://stackoverflow.com/questions/37421203/java-lang-noclassdeffounderror-com-google-firebase-firebaseoptions

[Mauro Micó Ebro via StackOverflow]

You have to use the com.google.firebase:firebase-ads:9.0.2 AdMob on Android dependencies,

compile 'com.google.firebase:firebase-ads:9.0.2'

and remove your

play-services (com.google.android.gms: play-services:9.0.2)

It works for me!

Please DO NOT REPLY directly to this email but go to StackOverflow:

http://stackoverflow.com/questions/37421203/java-lang-noclassdeffounderror-com-google-firebase-firebaseoptions/38016859#38016859