Fatal Exception: java.lang.RuntimeException: Unable to resume activity {com.mycompany.shop/com.mycompany.shop.activity.MainNavActivity}: java.lang.IndexOutOfBoundsException: Index: 3, Size: 3
       at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3645)
       at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3685)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1643)
       at android.os.Handler.dispatchMessage(Handler.java:105)
       at android.os.Looper.loop(Looper.java:164)
       at android.app.ActivityThread.main(ActivityThread.java:6541)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by java.lang.IndexOutOfBoundsException: Index: 3, Size: 3
       at java.util.ArrayList.get(ArrayList.java:437)
       at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1610)
       at android.app.FragmentManagerImpl.dispatchMoveToState(FragmentManager.java:3035)
       at android.app.FragmentManagerImpl.dispatchResume(FragmentManager.java:3001)
       at android.app.FragmentController.dispatchResume(FragmentController.java:200)
       at android.app.Activity.performResume(Activity.java:7100)
       at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3620)
       at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3685)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1643)
       at android.os.Handler.dispatchMessage(Handler.java:105)
       at android.os.Looper.loop(Looper.java:164)
       at android.app.ActivityThread.main(ActivityThread.java:6541)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)