"Unable to get provider com.google.firebase.provider.FirebaseInitProvider" Error path Android
<p>I have an Application which is connected to firebase.The problem is when install the app in device(working on several devices).I read a lot of forums and no one works.I read <a href="https://stackoverflow.com/questions/37328890/android-firebase-dynamitemodule-failed-to-load-module-descriptor">here</a> and <a href="https://stackoverflow.com/questions/37790190/google-map-implementation-in-viewpager-error-unable-to-get-provider-com-google">this</a> and so on.Thanks!!</p>

<p>The error is here.</p>

<pre><code>E/AndroidRuntime: FATAL EXCEPTION: main
              Process: com.dev.ptruck, PID: 8833
              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.dev.ptruck-17.apk"],nativeLibraryDirectories=[/data/app-lib/com.dev.ptruck-17, /vendor/lib, /system/lib]]
                  at android.app.ActivityThread.installProvider(ActivityThread.java:5196)
                  at android.app.ActivityThread.installContentProviders(ActivityThread.java:4788)
                  at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4728)
                  at android.app.ActivityThread.access$1500(ActivityThread.java:166)
                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1343)
                  at android.os.Handler.dispatchMessage(Handler.java:102)
                  at android.os.Looper.loop(Looper.java:136)
                  at android.app.ActivityThread.main(ActivityThread.java:5584)
                  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:1268)
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
                  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.dev.ptruck-17.apk"],nativeLibraryDirectories=[/data/app-lib/com.dev.ptruck-17, /vendor/lib, /system/lib]]
                  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
                  at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
                  at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
                  at android.app.ActivityThread.installProvider(ActivityThread.java:5181)
                  at android.app.ActivityThread.installContentProviders(ActivityThread.java:4788) 
                  at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4728) 
                  at android.app.ActivityThread.access$1500(ActivityThread.java:166) 
                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1343) 
                  at android.os.Handler.dispatchMessage(Handler.java:102) 
                  at android.os.Looper.loop(Looper.java:136) 
                  at android.app.ActivityThread.main(ActivityThread.java:5584) 
                  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:1268) 
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084) 
                  at dalvik.system.NativeStart.main(Native Method) 
</code></pre>

<p>Here is the start Class</p>

<pre><code>public class StartActivity extends Activity {
private static final String FIREBASE_URL = "https://database.firebaseio.com/";
private Firebase myFirebaseRef = null;
View rootView;
String uid;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_start);

    Firebase.setAndroidContext(this);
    final ProgressBar p = (ProgressBar) findViewById(R.id.start_progress_bar);

}
private void checkUserLogin() {
                    myFirebaseRef.addAuthStateListener(new Firebase.AuthStateListener() {
                        @Override
                        public void onAuthStateChanged(AuthData authData) {
                            if (authData != null) {

                                System.out.println(myFirebaseRef.getKey());
                                Intent toMainActivity = new Intent(getApplicationContext(), MenuActivity.class);
                                uid = myFirebaseRef.getAuth().getUid();
                                toMainActivity.putExtra("user_id", uid);
                                finish();
                                startActivity(toMainActivity);

                            } else if (authData == null) {

                                Intent toMainActivity = new Intent(getApplicationContext(), LoginActivity.class);
                                startActivity(toMainActivity);
                                // user is not logged in
                            }
                        }
                    });
}
private Runnable task = new Runnable() {
    public void run() {

        checkUserLogin();
    }
};
@Override
protected void onStart() {
    super.onStart();
    if(myFirebaseRef == null) {
        myFirebaseRef = new Firebase(FIREBASE_URL);
    }
    Handler handler = new Handler();
    handler.postDelayed(task, 3000);

}
@Override
protected void onDestroy() {
    super.onDestroy();

    unbindDrawables(rootView);
    rootView = null;
    System.gc();

}
protected void unbindDrawables(View view) {
    if (view != null) {
        if (view.getBackground() != null) {
            view.getBackground().setCallback(null);
        }
        if (view instanceof ViewGroup &amp;&amp; !(view instanceof AdapterView)) {
            for (int i = 0; i &lt; ((ViewGroup) view).getChildCount(); i++) {
                unbindDrawables(((ViewGroup) view).getChildAt(i));
            }
            ((ViewGroup) view).removeAllViews();
        }

    }

}
</code></pre>

<p>}</p>