참고 한 Medium 글 How AndroidX changes the way we work with Activities and Fragments Over the last couple of months, many improvements to the Activity/Fragment APIs have been introduced via the AndroidX packages. medium.com 1. Fragment 에서 OnBackPressed 관리 class MyFragment : Fragment() { override fun onAttach(context: Context) { super.onAttach(context) val callback = object : OnBackPressedCallback(tr..