How to do `NestedNavigation` (jetpack navigation) ...

# compose

[Clament John]

How to do NestedNavigation (jetpack navigation) with arguments?

How would I pass id to the login nav graph?

fun NavGraphBuilder.loginGraph(navController: NavController) {
    navigation(
        startDestination = "username", 
        route = "login/{id}", 
        arguments = listOf(navArgument("id") { type = NavType.StringType }),
    ) {
        composable("username") { ... }
        composable("password") { ... }
        composable("registration") { ... }
    }
}

[Johan Reitan]

You’re doing it correctly. Just navigate to the graph: navController.navigate("login/123"). You can get the argument either from the `startDestination`’s arguments, or from the graph’s arguments:

navController.getBackStackEntry("login/{id}").arguments.getString("id")

[Clament John]

But arguments is not a valid parameter for navigation . This is why I was confused how to do it

[Clament John]

There is a similar question asking how to add deeplink to nested navigation graph
https://stackoverflow.com/questions/69906721/jetpack-compose-deep-link-into-nested-navigation

[Johan Reitan]

Oh, are you using the navigation function from Accompanist? It’s missing these arguments, but the function from androidx.navigation.compose has them

[Clament John]

Yes from accompanist. Does the regular function from jetpack navigation have arguments param?

[Johan Reitan]

It works fine with transition animations, just make sure you use the composable functions from com.google.accompanist.navigation.animation

[Johan Reitan]

Yes, the regular one has it:

public fun NavGraphBuilder.navigation(
    startDestination: String,
    route: String,
    arguments: List<NamedNavArgument> = emptyList(),
    deepLinks: List<NavDeepLink> = emptyList(),
    builder: NavGraphBuilder.() -> Unit
)

[Clament John]

Ok. Will check it out. Thanks

[Ian Lake]

Note you don't need them as parameters at all - that is pure convenience. The lambda parameter is the scope that lets you set all of those extra parameters:

fun NavGraphBuilder.loginGraph(navController: NavController) {
     navigation(
         startDestination = "username", 
         route = "login/{id}"
     ) {
         // Inside the lambda, any of the
         // NavGraphBuilder extensions can
         // be called directly
         navArgument("id") { type = NavType.StringType })
         composable("username") { ... }
         composable("password") { ... }
         composable("registration") { ... }
     }
 }