Remove up button from action bar when navigating using BottomNavigationView with Android Navigation UI library

Question

I\'ve created a small app that has three fragments for top-level navigation through a BottomNavigationView. If you launch the app and click on a navigation button on the bottom

Answer 1

You could set the navigation icon to null, or change the icon only for some destinations eg:

1) In Kotlin:

navController.addOnDestinationChangedListener { _, destination, _ ->
            toolbar.title = destination.label
            toolbar.navigationIcon = null
}

2) In Java:

hostFragment.getNavController().addOnDestinationChangedListener(new OnDestinationChangedListener() {
    public final void onDestinationChanged(@NotNull NavController controller, @NotNull NavDestination destination, @Nullable Bundle arguments) {
        toolbar.setTitle(destination.getLabel());
        toolbar.setNavigationIcon(null);
    }
});