package Ġcom . example . android _ study . jet pack . demos . navigation _ view model Ċ Ċ import Ġandroid . os . Bundle Ċ import Ġcom . example . android _ study . R Ċ import Ġcom . example . android _ study ._ base . Base Activity Ċ Ċ class ĠNavigation ViewModel Ay Ġ: ĠBase Activity () Ġ{ ĊĊĠĠĠ Ġoverride Ġfun Ġget Layout Id () Ġ= ĠR . layout . activity _ navigation _ view _ model _ ay ĊĊĠĠĠ Ġoverride Ġfun Ġinit View And Data ( savedInstanceState : ĠBundle ?) Ġ{ ĊĠĠĠ Ġ} Ċ }