How ViewModel communicate with other ViewModel that in the same Activity?

[Guang1234567]

Helllo dev:

How ViewModel communicate with other ViewModel that in the same Activity?

Could you provide some suggest or sample? Thanks.

Because i have a similar "Master/Detail Fragment" that has "MasterViewModel and DetailViewModel", so i want to reuse them when the device switches between portrait and landscape orientation.

Issue below not my love: https://github.com/googlesamples/android-architecture-components/issues/109

[elvedinelvis]

Use a shared ViewModel which provides data for both the MasterFragment and DetailFragment. Initialize the ViewModel in both fragments with activity?.run { ViewModelProvider.of (this, ...)}

[pratz9999]

@elvedinelvis I get ViewModel has no zero argument constructor. Could you share the same fragment?