Android Jetpack Navigation, BottomNavigationView with Youtube or Instagram like proper back navigation (fragment back stack)?

Question

Android Jetpack Navigation, BottomNavigationView with auto fragment back stack on back button click?

What I wanted, after choosing multiple tabs one after another by

Answer 1

I didn't find any official solutions, but I use my own way

First, I create Stack for handle fragments

    needToAddToBackStack : Boolen = true


    private lateinit var fragmentBackStack: Stack
    fragmentBackStack = Stack()

and in

navController.addOnDestinationChangedListener { _, destination, _ ->
        if (needToAddToBackStack) {
            fragmentBackStack.add(destination.id)
        }


        needToAddToBackStack = true

    }

and handle the back button

override fun onBackPressed() {
    if (::fragmentBackStack.isInitialized && fragmentBackStack.size > 1) {
        fragmentBackStack.pop()
        val fragmentId = fragmentBackStack.lastElement()
        needToAddToBackStack = false
        navController.navigate(fragmentId)

    } else {
        if (::fragmentBackStack.isInitialized && fragmentBackStack.size == 1) {
            finish()
        } else {
            super.onBackPressed()
        }
    }