Android - How to hide menu option for current fragment

Question

I have an ActionBar activity with a FrameLayout and a menu. when the user clicks the menu item I replace the fragment with the relevant new fragment. However, I cannot see a

Answer 1

// create Boolean variable in the main activity
private var menuvisibile:  Boolean = true

// while navigating fragments set the menuvisibile value and use it 
// variable as part of the return statement
invalidateOptionsMenu()
menuvisibile = false

override fun onCreateOptionsMenu(menu: Menu?): Boolean 
    {
        val menuInflater  = menuInflater
        menuInflater.inflate(R.menu.notification,menu)
        return menuvisibile
    }

working well for me.