NavController Usage Activity and Fragment Basics -- Ref. Code Snippet

NavigationCodeSnippet.kt

// Code Snippet

// Activity ActionBar with NavController 

lateinit var binding: ActivityHomeBinding
lateinit var navController: NavController
lateinit var appBarConfig: AppBarConfiguration

private fun initialize() {
        setSupportActionBar(binding.toolbar)

        // While Using FragmentContainerView
        navController =
            (supportFragmentManager.findFragmentById(R.id.navigation_fragment_view) as NavHostFragment).navController

        // While Using Fragment
        //navController = findNavController(R.id.navigation_fragment_view)

        // Add Appbar config and navigation controller to the ActionBar
        appBarConfig = AppBarConfiguration(navController.graph)
        setupActionBarWithNavController(navController, appBarConfig)
}

override fun onSupportNavigateUp(): Boolean {
    return navController.navigateUp(appBarConfig) || super.onSupportNavigateUp()
}

// In Fragment

//Param values through Bundle
findNavController().navigate(R.id.action_consumer_to_detail_fragment, bundleData)

// Safe-args as Primitive values
val action = ConsumerFragmentDirections.actionConsumerToDetailFragment(consumerName, consumerYoB)
findNavController().navigate(action)

//Parcelize Data Object 
val action = ConsumerFragmentDirections.actionConsumerToDetailFragment(ConsumerData(consumerName, consumerYoB))
findNavController().navigate(action)