Dynamic ActionBar title from a Fragment using AndroidX Navigation

Question

I am using the new Navigation component from Android Jetpack.

The root Activity setup is quite simple:

override fun onCreate(savedInstanceState: Bund         


        

Answer 1

Taking consideration that your host activity is MainActivity, just add the following code to your MainActivity's onCreate fun

val navController = Navigation.findNavController(this, R.id.nav_host_fragment)

// setting title according to fragment
navController.addOnDestinationChangedListener { 
    controller, destination, arguments ->
        toolbar.title = navController.currentDestination?.label
}