Navigate to Existing Fragment Using NavController

Question

I have a complicated structure where a number of Fragments link to each other, so using NavController I am trying to avoid creating multiple duplicates of the same Fragment in the BackStack.

I found this post How to check Navigation Destination is in the NavController back stack or not?, which I have implemented as below:

    private fun onSiteItemClicked(item: SiteObject) {
        Log.d(TAG, "onItemClicked() - ${item.siteReference}")
        item.siteID.let {
            businessViewModel.updateCurrentSiteVMLiveData(it)
            try {
                val backStackEntry : NavBackStackEntry = navController.getBackStackEntry(R.id.siteFragment)
                makeToast("backStackEntry = ${backStackEntry.destination.label.toString()}")
                // Navigate to existing Fragment!! HOW TO DO?
            } catch (ex: IllegalArgumentException) {
                navController.navigate(R.id.action_contactFragment_to_siteFragment)
                // Creates new Fragment as one doesn't existing in backstack. THIS WORKS!
            }
            
        }
    }

So I have a reference to the Fragment in the BackStack, but I can't see how to navigate to it..

Navigate to Existing Fragment Using NavController

0 Answers