How to get other fragment's ViewModel

Question

I have an external event that changes several fragments state, As I am using Android architecture components I've created several ModelViews for every fragment.

What is the right way to send messages between ModelViews

Answer 1

I am assuming you are using viewModel to preserve state across activity and fragment recreations. You do realize that a viewModel is essentially your model class, right? So why would you want to send messages between viewModels?

If you have an external event that changes a fragment's state, you should propagate it to your activities who will then send those message to your fragments where you can update your view model's state.