When you press back on any tab it will exit the app

[SyedAsimAliSE]

Hi, thanks for this most wanted solution , but when you press back on any tab it will exit the app. !

thanks

[SyedAsimAliSE]

Here is how i solved it after wasting an hour to just figure out how to access the selected graph stack in parent activity:

leaving this here to save others time :)

1 Create an Interface

interface NavBackListener {

    fun onNavigateBack(from: String?)
}

2 Implement it in MainActivity

override fun onNavigateBack(from: String?) {

//update the bottom nav bar manually  & navigate back to home**      
        bottomNavBar.selectedItemId = R.id.main_nav_home
        navController.navigate(R.id.main_nav_home)

    }

3 Implement OnBackPressedCallback in the fragments

override fun onActivityCreated(savedInstanceState: Bundle?) {
        activity?.addOnBackPressedCallback(viewLifecycleOwner, this)
        super.onActivityCreated(savedInstanceState)
    }

override fun handleOnBackPressed(): Boolean {
        navBackListener?.onNavigateBack(getString(R.string.tab_cats_lbl))
        return true
    }

override fun onDestroyView() {
        super.onDestroyView()
        activity?.removeOnBackPressedCallback(this)
    }

4 Attach NavBackListener in the fragments

override fun onAttach(context: Context) {
        super.onAttach(context)

        navBackListener = getListenerOrThrowException(NavBackListener::class.java)

    }

    override fun onDetach() {
        super.onDetach()
        navBackListener = null
    }

[STAR-ZERO]

I created sample for back stack. See this commit. https://github.com/STAR-ZERO/navigation-keep-fragment-sample/commit/cc9c0e36de1568a7e4ddd5dc0d72405bb1c0eb6a

[STAR-ZERO]

Official sample here. Please see it.