A single file abstraction for compose navigation with the help of reflection .

AppNavigation.kt

package com.prasanth.sampleapp.navigation

import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.navigation.NamedNavArgument
import androidx.navigation.NavController
import androidx.navigation.compose.NavHost
import androidx.navigation.compose.composable
import androidx.navigation.compose.rememberNavController
import com.prasanth.sampleapp.view.DetailScreen
import com.prasanth.sampleapp.view.HomeScreen

@Composable
fun AppNavigation(modifier: Modifier = Modifier) {
    val navController = rememberNavController()
    val navigator = AppNavigation(navController)
    NavHost(
        navController = navController,
        startDestination = NavigationRoute.HOME.toString(),
        modifier = modifier,
    ) {
        NavigationRoute::class.nestedClasses.forEach {
            val datObj = it.objectInstance
            if (datObj is NavigationRoute) {
                composable(route = datObj.name, arguments = datObj.args) {
                    datObj.screen?.invoke(navigator)
                }
            }
        }
    }
}

sealed class NavigationRoute(
    val name: String = "",
    val args: List<NamedNavArgument> = listOf(),
    val screen: @Composable ((navController: AppNavigation) -> Unit)? = null,
) {
    data object HOME : NavigationRoute(name = "home", screen = { HomeScreen(it) })
    data object DETAILSCREEN : NavigationRoute(name = "detail", screen = { DetailScreen(it) })
}

class AppNavigation(private val navController: NavController) {
    fun navigate(destination: NavigationRoute) {
        navController.navigate(destination.name)
    }

    fun navigateUp() {
        navController.navigateUp()
    }

    fun setResult(key: String = "ACTION_RESULT", value: Any?) {
        navController.previousBackStackEntry?.savedStateHandle?.set(key, value)
    }

    fun <T> getResult(key: String = "ACTION_RESULT"): T? {
        return navController.currentBackStackEntry?.savedStateHandle?.get<T>(key)
    }
}