How to set title in app bar with Navigation Architecture Component

Question

I was trying out Navigation architecture component and is now having difficulties in setting the title. How do I set the title programmatically and also how it works?

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Answer 1

NavigationUI.setupActionBarWithNavController(this, navController)

Don't forget to specify android:label for your fragments in your nav graphs.

To navigate back:

override fun onSupportNavigateUp(): Boolean {
    return NavigationUI.navigateUp(navController, null)
}