When using Navigation Component, how do I set an argument at runtime for a destination accessed via navigation view menu?

Question

I have a navigation drawer with a navigation view with menu items and I'm using navigation component. How do I specify an argument for a destination at runtime when a certain menu item in the navigation view is clicked?

I know I can set default arguments in the nav graph but this is not what I want to do because the argument passed needs to be decided at runtime. For toolbar menu items, I have no issue as I'm able to override onOptionsItemSelected. My issue is specifically with menu items in the navigation view.

I have tried the approach here: https://stackoverflow.com/a/54086631/10933532 but I am unable to create a NavArgument as described. The NavArgument class does not give me the public Builder() constructor.

I set up my navigation view with the navigation controller in mainactivity onCreate like this:

NavigationUI.setupWithNavController(navigationView,navController);

I also do this to set up my toolbar with the navigation controller:

NavigationUI.setupWithNavController(collapsingToolbarLayout,toolbar,navController,appBarConfiguration);

Can someone please point me in the right direction?

Answer 1

You can use a custom NavigationItemSelectedListener.

Pay attention because in this way you are removing the original listener. You have to call NavigationUI.onNavDestinationSelected() to trigger the default behavior.

navigationView.setNavigationItemSelectedListener {
        when (it.itemId) {
            R.id.xxxxx -> {
                // handle click
                true
            }
         }
         //Call the original listener
         NavigationUI.onNavDestinationSelected(it, navController)
         drawerLayout.closeDrawer(GravityCompat.START)
         true
    }