title: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path
body: <p>when run app in genymotion. It show dialog "unfortunately has stopped". I don't understant logcat. Can you tell me about what happened?</p>
  
  <pre><code>    01-14 11:16:55.561 3229-3229/? E/AndroidRuntime: FATAL EXCEPTION: main
      java.lang.RuntimeException: Unable to get provider com.google.firebase.provider.FirebaseInitProvider: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.example.mypc.map1-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.mypc.map1-1, /system/lib]]
      at android.app.ActivityThread.installProvider(ActivityThread.java:4882)
      at android.app.ActivityThread.installContentProviders(ActivityThread.java:4485)
      at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4425)
      at android.app.ActivityThread.access$1300(ActivityThread.java:141)
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
      at android.os.Handler.dispatchMessage(Handler.java:99)
      at android.os.Looper.loop(Looper.java:137)
      at android.app.ActivityThread.main(ActivityThread.java:5103)
      at java.lang.reflect.Method.invokeNative(Native Method)
      at java.lang.reflect.Method.invoke(Method.java:525)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
      at dalvik.system.NativeStart.main(Native Method)
      Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.example.mypc.map1-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.mypc.map1-1, /system/lib]]
      at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
      at android.app.ActivityThread.installProvider(ActivityThread.java:4867)
      at android.app.ActivityThread.installContentProviders(ActivityThread.java:4485) 
      at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4425) 
      at android.app.ActivityThread.access$1300(ActivityThread.java:141) 
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316) 
      at android.os.Handler.dispatchMessage(Handler.java:99) 
      at android.os.Looper.loop(Looper.java:137) 
      at android.app.ActivityThread.main(ActivityThread.java:5103) 
      at java.lang.reflect.Method.invokeNative(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:525) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
      at dalvik.system.NativeStart.main(Native Method) 
  </code></pre>
  
  <p><strong>build.gradle</strong></p>
  
  <p><a href="https://i.stack.imgur.com/cvWBl.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cvWBl.png" alt="enter image description here"></a></p>