How to share ViewModel between Parent fragment and fragment inside child fragment

Question

I have parent Fragment that contains child fragment. Inside child fragment I have ViewPager with fragments. My question is how can I share ViewModel between parent child and fragments in viewpager and makeing Viewmodel visible only on ParentFragment scope?

Answer 1

what do you mean when you say "visible only on ParentFragment scope"?

According Google's document, there is one way that you can share ViewModel. Check this document: https://developer.android.com/topic/libraries/architecture/viewmodel#sharing Shortly, your parent fragment and child fragment will use the same ViewModel. Your parent fragment will call the function of ViewModel to change the data, your child fragment just observer the LiveData of ViewModel.