Compose ViewModel LIfecycle

compose_viewmodel_lifecycle_observer.kt

@HiltViewModel
class CityViewModel @Inject constructor() : ViewModel() {

    fun onStart() {
        // start task - the composable has entered the composition
    }

    fun onStop() {
        // cancel task - the composable has left the composition
    }
}

@Composable
fun CityScreen(
    viewModel: CityViewModel,
    modifier: Modifier = Modifier,
) {
    val state = viewModel.state.collectAsState()

    DisposableEffect(key1 = viewModel) {
        viewModel.onStart()
        onDispose { viewModel.onStop() }
    }
  
    // screen content omitted for brevity
}