how to implement Conditional Navigation in navigation architecture components

Question

In the new Navigation architecture component, how to implement conditional navigation?

Currently I have a single activity with LoginFragment and HomeFragment. Based on a

Answer 1

You can add navigation listener inside your activity, and from there navigate to LoginFragment based on your conditions, like this:

findNavController(nav_host_fragment).addOnNavigatedListener { controller, destination ->
        when(destination.id) {
            R.id.HomeFragment-> {
             if(someCondition) {
               //Navigate to LoginFragment
             }

        }
    }