Kotlin 如何在 Android 的 Fragment 中使用 setUserVisibleHint

在我的应用程序中，我有BottomNavBar，我想在点击这BottomNavBar的项目时显示fragments

我想对这fragment中的一个使用100方法，但是当显示这fragment时不调用100！

My Activity codes for set fragments to BottomNavBar items :

class HomeActivity : BaseActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    setupNavigation()

    }

        private fun setupNavigation() {
        val navController = Navigation.findNavController(this, R.id.homePage_fragmentNavHost)
        NavigationUI.setupWithNavController(homePage_bottomNavBar, navController)
    }

    override fun onSupportNavigateUp() = Navigation.findNavController(this, R.id.homePage_fragmentNavHost).navigateUp()
}

My Fragment codes :

class HomeDashboardFragment : Fragment(){

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_home_dashboard, container, false)
    }

    override fun setUserVisibleHint(isVisibleToUser: Boolean) {
        super.setUserVisibleHint(isVisibleToUser)
        if (isVisibleToUser) {
            Handler().postDelayed({ requireContext().toast("Show") }, 500)
        }
    }
}

Why not work setUserVisibleHint into fragment ?