title: java.lang.NoClassDefFoundError: com.google.firebase.FirebaseOptions
body: <p>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</p>
  
  <pre><code>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)
  </code></pre>
  
  <p>Here is a screenshot of the Test.
  <a href="https://i.stack.imgur.com/xJYOo.png"><img src="https://i.stack.imgur.com/xJYOo.png" alt="enter image description here"></a></p>
  
  <p>Now Here's the funny part, <strong>I dont even use Firebase in my app at all</strong>. 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.</p>
  
  <p>Here's my build.gradle file:</p>
  
  <pre><code>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')
  }
  </code></pre>
  
  <p>Can anyone help me out here ?</p>