```class AppViewModel : ViewModel(), LifecycleObserver { val myCoreModel = MyCoreViewModel() ...

# android

[Daniele B]

class AppViewModel : ViewModel(), LifecycleObserver {

    val myCoreModel = MyCoreViewModel()

    @OnLifecycleEvent(Lifecycle.Event.ON_START)
    fun onStart() {
        myCoreModel.appEnteredForeground()
    }

    override fun onCleared() {
        super.onCleared()
        myCoreModel.appWillClose()
    }

}

How can I capture, from within the Android’s ViewModel, the event of the app entering the foreground? I tried this way, but my function appEnteredForeground doesn’t get fired.

[florent]

That's half of the implementation, you also need to register the lifecycleObserver in the activity/fragment