gistfile1.txt

   override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        bottomNavigation = findViewById(R.id.nav_view)

        val appBarConfiguration = AppBarConfiguration(
            setOf(
                R.id.navigation_home, R.id.navigation_dashboard, R.id.navigation_notifications
            )
        )

        val navGraphIds = listOf(
            R.navigation.home_nav_graph,
            R.navigation.dashboard_nav_graph,
            R.navigation.notifications_nav_graph
        )

        val controller = bottomNavigation.setupWithNavController(
            navGraphIds = navGraphIds,
            fragmentManager = supportFragmentManager,
            containerId = R.id.nav_host_fragment,
            intent = intent
        )

        // Whenever the selected controller changes, setup the action bar.
        controller.observe(this, Observer { navController ->
            setupActionBarWithNavController(navController, appBarConfiguration)
        })
        currentNavController = controller
    }