Your First Kotlin Android App: Polishing the App

Aug 22 2023 · Kotlin 1.8.20, Android 13, Android Studio Flamingo | 2022.2.1

Part 3: Finish the App

20. Add Navigation to the App

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Navigation in Jetpack Compose refers to the interactions that lets you move across composables in your app. And this is possible using the Navigation components API which is bundled with cool features to make handling navigation easier.

implementation('androidx.navigation:navigation-compose:2.5.3')

@Composable
fun MainScreen() {

}

Surface(modifier = Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.background) {
  MainScreen() // Update Code
}

val navController = rememberNavController()

NavHost(navController = navController, startDestination = "gamescreen") {
  composable("gamescreen") { GameScreen() }
  composable("about") { AboutScreen() }
}

@Composable
fun GameDetail(
  //...
  onNavigateToAbout: () -> Unit // New Code
) {

onClick = { onNavigateToAbout() },

GameDetail(onStartOver = {}, onNavigateToAbout = {})

GameDetail(
  //...
  onNavigateToAbout = onNavigateToAbout,
  //...
)

fun GameScreen(
  onNavigateToAbout: () -> Unit
) {
  //...
}

GameScreen(onNavigateToAbout = {})

composable("gamescreen") {
  GameScreen(
    onNavigateToAbout = { navController.navigate("about") } // New Code
  )
}