Navigation Component: pass safeArgs from activity to a fragment

Question

I have two graphs, so the first graph move from one fragment to an activity passing safeArgs to the activity.

val action = MyFragmentDirections.actionMyActiv         


        

Answer 1

I don't know if this is recommended, but it is working:

val args = MyActivity.fromBundle(intent.extras)
navController.navigate(R.id.myActivityFragment, args.toBundle())

Answer 2

Navigation 1.0.0-alpha07 fixed the feature request for passing arguments to the start destination of a graph.

To use this, you'd need to:

1. Remove the app:navGraph attribute from your NavHostFragment
2. Call findNavController(R.id.your_nav_host_fragment).setGraph(R.navigation.your_graph, intent.extras)

Using the R.id of your NavHostFragment and R.navigation that you previously had on your app:navGraph tag. By passing the arguments into the setGraph call, your starting destination will get the arguments directly, without calling navigate again (which would, by default, create a new instance of the destination on your back stack - not what you want).