public static void overrideTransitionToFade(final Activity activity) {
        activity.overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
    }
should be used after calling {@link Activity#startActivity(Intent)} when coming from or going to a BottomNavigationActivity
main/src/main/java/cgeo/geocaching/activity/ActivityMixin.java