Your First Kotlin Android App: Polishing the App

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

Part 1: Build Out the App

08. Restart the Game

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For the next item on our nice to haves from our programming todo list, you’ll add the ability for the player to restart the game. To do this, we’re going to need a new function we can call to restart the game.

fun startNewGame() {

}

//...
totalScore = 0
currentRound = 1
sliderValue = 0.5f
targetValue = Random.nextInt(1, 100)
//...

fun newTargetValue() = Random.nextInt(1, 100)

fun startNewGame() {
  //...
  targetValue = newTargetValue() // Updated Code
}

onRoundIncrement = {
  currentRound += 1
  targetValue = newTargetValue() // Updated Code
}

var targetValue by rememberSaveable { mutableStateOf(newTargetValue()) }

@Composable
fun GameDetail(
  //...
  onStartOver: () -> Unit, // New Code
) {
  //...
}

Button(onClick = { onStartOver() }) { // Updated Code
  Text(stringResource(R.string.start_over))
}

GameDetail(onStartOver = {})

GameDetail(
  //...
  onStartOver = { startNewGame() },
  //...
)