Toolbar menu onOptionsItemSelected does not work from fragment

Question

I'm trying to change current fragment when user clicks the menu in toolbar using navigation components, however I can't get the menu to work from fragment at all! I'm using bottom navigation bar with 2 fragments and each fragment has different toolbar menu items, I'm not using navigation drawer. Here's a little snippet from HomeFragment.kt:

override​ ​fun​ ​onCreateView​(
    inflater​:​ ​LayoutInflater​, ​container​:​ ​ViewGroup?​,
    savedInstanceState​:​ ​Bundle?​
)​:​ ​View?​ {
    activity?.title ​=​ getString(​R​.string.title_home)
    setHasOptionsMenu(​true​)

    return​ inflater.inflate(​R​.layout.fragment_home, container, ​false​)
}

override​ ​fun​ ​onCreateOptionsMenu​(​menu​:​ ​Menu​, ​inflater​:​ ​MenuInflater​) {
    inflater.inflate(​R​.menu.toolbar_menu, menu)
    super​ .onCreateOptionsMenu(menu, inflater)
}

override​ ​fun​ ​onOptionsItemSelected​(​item​:​ ​MenuItem​)​:​ ​Boolean​ {
    when​ (item.itemId) {
         R​.id.toolbar_about ​-​>​ {
            activity?.findNavController(​R​.id.bottom_nav_host)?.navigate(​R​.id.toAboutFragment)
             Toast​.makeText(context, ​"​You clicked on About menu​"​, ​Toast​.​LENGTH_SHORT​).show()
        }
        else​ ​-​>​ ​super​.onOptionsItemSelected(item)
    }
    return​ ​true​
}

It doesn't even display the Toast that I specified. Could anyone help me? Thanks in advance!

Answer 1

I managed to fix this by calling onOptionsItemSelected directly from activity instead of fragment. So my final code looks like this:
HomeFragment.kt:

//We set menu from fragment
override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) { 
    inflater.inflate(R.menu.toolbar_menu, menu)
    super .onCreateOptionsMenu(menu, inflater) 
}

MainActivity.kt:

override fun onOptionsItemSelected(item: MenuItem): Boolean { 
    val navHost = findNavController(R.id.bottom_nav_host) 
    when (item.itemId) { 
        android.R.id.home -> { 
            onBackPressed() 
            return true 
        }
        //This one is for our fragment toolbar menu
        R.id.toolbar_about -> { 
            navHost.navigate(R.id.toAboutFragment) 
            return true 
        }
    }
    return false
}