From the docs , I see you can nest navigation graphs like so:
NavHost(navController, startDestination = "home") {
...
// Navigating to the graph via its route ('login') automatically
// navigates to the graph's start destination - 'username'
// therefore encapsulating the graph's internal routing logic
navigation(startDestination = "username", route = "login") {
composable("username") { ... }
composable("password") { ... }
composable("registration") { ... }
}
...
}
I am wondering, how would one pass an argument in the route, and make that available to all composables inside the nav graph?
Here's my current nav graph:
navigation(
// I'd like to grab this parameter
route = "dashboard?classId={classId}",
startDestination = Route.ScreenOne.route) {
composable(Route.ScreenOne.route) {
// And then pass the parameter here, or to any composable below
ScreenOne(classId)
}
composable(Route.ScreenTwo.route) {
ScreenTwo()
}
composable(Route.ScreenThree.route) {
ScreenThree()
}
}
I am basically trying to avoid setting the classId navigation argument individually on each composable route. I didn't see a way to pass a list of arguments to navigation()
like you can in a composable()
.
It might be that what I am describing isn't possible, but looking forward to anyone's thoughts!
The can access the graph arguments from child composables:
navController.getBackStackEntry("dashboard?classId={classId}").arguments?.getString("classId")
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