public class MyLibraryClass implements LifecycleObserver { private MyViewModel myViewModel; public MyLibraryClass(LifecycleOwner lifecycleOwner) { myViewModel = ViewModelProviders.of(lifecycleOwner).get(MyViewModel.class); lifecycleOwner.getLifecycle().addObserver(this); } @OnLifecycleEvent(Lifecycle.Event.ON_START) public void onStart() { } @OnLifecycleEvent(Lifecycle.Event.ON_STOP) public void onStop() { } }