Android Academy · Lesson

Navigation Across Modules

Connect features without coupling.

The Navigation Challenge

Once features live in separate modules, a new question appears: how does :feature:home open a screen in :feature:profile without depending on it? If features import each other directly, you get coupling and risk cycles.

In this lesson you will connect features through navigation while keeping them independent.

Where the NavHost Lives

The single NavHost lives in the :app module, the one place that is allowed to know about every feature. Each feature contributes its destinations, and :app assembles them into one graph.

// app/AppNavHost.kt
@Composable
fun AppNavHost(navController: NavHostController = rememberNavController()) {
    NavHost(navController, startDestination = HomeRoute) {
        homeScreen(onProfileClick = { navController.navigate(ProfileRoute) })
        profileScreen(onBack = { navController.popBackStack() })
    }
}

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