Question 128341 in Android Studio Question posted in
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Android Studio – BottonNavigationView Icon not changing on back press

I am using navigation component for bottom navigation component.

bottomNavbar.setupWithNavController(navController)

now this is working fine but when I hit the back button, it is returning to the home page but the icon is not changing, it is stuck in the previous selected fragment. I have three fragments and I have implemented navbar separately in all those fragments, here’s the code for those three fragments.

settings fragment

val bottomNavbar = view.findViewById<BottomNavigationView>(R.id.bottomNavbar)
bottomNavbar.setupWithNavController(navController)

search fragment

    val bottomNavbar = view.findViewById<BottomNavigationView>(R.id.bottomNavbarSearch)
    bottomNavbar.setupWithNavController(navController)

chat fragment

val bottomNavbar = view.findViewById<BottomNavigationView>(R.id.bottomNavbar)
    bottomNavbar.setupWithNavController(navController)

here search fragment is my home fragment.

Is there a mistake in my implementation or should I just switch to the old way of implementing bottom navigation view.

any help is appreciated. Thanks

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2

Answers


  1. 0

    Make sure to have the same ids in the bottomNavView menu that matches
    the corresponding ones in the navGraph of the bottomNavView fragments.

    check this answer

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  2. 0

    It seems you have added BottomNavigationView on all three fragments which should ideally be on Activity’s view below your fragment/FragmentContainerView where you have defined your navGraph.

    To fix it you need to remove BottomNavigationView from all 3 fragments and add it on Activity using the following basic structure.

    Activity XML structure:

    <constriantLayout>
    <fragment/> //with navGraph
    <bottomNavigationView/>
</constraintLayout>

    and onCreate of Activity use the code setting up BottomNavigationView

    val bottomNavbar = findViewById<BottomNavigationView>(R.id.bottomNavbar)
bottomNavbar.setupWithNavController(navController)
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