Tag: onNavDestinationSelected

Create a menu resource file in the res/menu folder:

<?xml version="1.0" encoding="utf-8"?>

<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/aboutFragment"
        android:title="@string/about" />

</menu>

In the relevant Activity/Fragment:

import ...

class TitleFragment : Fragment() {
    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                              savedInstanceState: Bundle?): View? {
        val binding: FragmentTitleBinding = DataBindingUtil.inflate(
                inflater, R.layout.fragment_title, container, false)
        setHasOptionsMenu(true) // State that we want an overflow menu
        return binding.root
    }

    override fun onCreateOptionsMenu(menu: Menu?, inflater: MenuInflater?) { // Override onCreateOptionsMenu
        super.onCreateOptionsMenu(menu, inflater)
        inflater?.inflate(R.menu.overflow_menu, menu) // Feed in the xml resource you created
    }

    override fun onOptionsItemSelected(item: MenuItem?): Boolean { // Override onOptionsItemSelected 
        return NavigationUI.onNavDestinationSelected(item!!, view!!.findNavController()) // Use the NavigationUI class to determine if you clicked an item in your list
                || super.onOptionsItemSelected(item) // If not, defer to super
    }
}