Падение при resume

[BishopGIS]

java.lang.RuntimeException: Unable to resume activity {com.nextgis.safeforest/com.nextgis.safeforest.activity.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.support.design.widget.TabLayout.getSelectedTabPosition()' on a null object reference
    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3527)
    at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3558)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2878)
    at android.app.ActivityThread.access$900(ActivityThread.java:181)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1482)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:145)
    at android.app.ActivityThread.main(ActivityThread.java:6145)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.support.design.widget.TabLayout.getSelectedTabPosition()' on a null object reference
    at com.nextgis.safeforest.activity.MainActivity.isMapShown(MainActivity.java:387)
    at com.nextgis.safeforest.fragment.MapFragment.onResume(MapFragment.java:325)
    at android.support.v4.app.Fragment.performResume(Fragment.java:2008)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1119)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1259)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1241)
    at android.support.v4.app.FragmentManagerImpl.dispatchResume(FragmentManager.java:2063)
    at android.support.v4.app.FragmentController.dispatchResume(FragmentController.java:187)
    at android.support.v4.app.FragmentActivity.onResumeFragments(FragmentActivity.java:462)
    at android.support.v4.app.FragmentActivity.onPostResume(FragmentActivity.java:451)
    at android.support.v7.app.AppCompatActivity.onPostResume(AppCompatActivity.java:141)
    at android.app.Activity.performResume(Activity.java:6513)
    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3516)
    ... 11 more