LaunchedEffectActivity.kt

class LaunchedEffectActivity  : ComponentActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            CurrentScreen()
        }
    }

    @Composable
    private fun CurrentScreen(
        vm : LaunchedEffectVm = LaunchedEffectVm()
    ){
        LaunchedEffect(key1 = true){
            vm.sharedFlow.collect{
                when(it){
                    is LaunchedEffectVm.LaunchedEffectEvents.DisplayErrorMessage -> TODO()
                    is LaunchedEffectVm.LaunchedEffectEvents.ShowNotification -> {
                        Toast.makeText(this@LaunchedEffectActivity,"Value->"+it.count,Toast.LENGTH_LONG).show()
                    }
                }
            }
        }
    }
}

LaunchedEffectVm.kt

class LaunchedEffectVm : ViewModel() {

    private val _sharedFlow = MutableSharedFlow<LaunchedEffectEvents>()
    val sharedFlow = _sharedFlow.asSharedFlow()

    init {
        viewModelScope.launch {
            _sharedFlow.emit(LaunchedEffectEvents.ShowNotification(1))
        }
    }

    sealed class LaunchedEffectEvents {
        data class DisplayErrorMessage(val message : String):LaunchedEffectEvents()
        data class ShowNotification(val count : Int):LaunchedEffectEvents()
    }

}