Handle different actions on views interaction

Android
1

Hello,

I’m having a hard time finding an implementation that will allow me to provide different actions on a button click as an example.

Let’s say there are three types of users A, B and C. On a button click user A calls method A, user B calls method B and user C calls method A and B.

I am trying to use this with MVVM. So far I’ve got this idea:

Having defined an ActionState class, that is observed in the MainActivity. Should work like a ViewState.

 sealed class ActionState {
        object UserTypeAAcceptOrder : ActionState()
        object UserTypeBAcceptOrder : ActionState()
        object UserTypeCAcceptOrder : ActionState()
    }

viewModel.actionState.observe(this) { state ->
    when (state) {
        is MainActivityViewModel.ActionState.UserTypeAAcceptOrder -> methodA()
        is MainActivityViewModel.ActionState.UserTypeBAcceptOrder -> methodB()
        is MainActivityViewModel.ActionState.UserTypeCAcceptOrder -> {
            methodA()
            methodB()
        }
    }
}

I don’t know if this is a good approach, I find it ok, but I’m not happy with it. Happy to hear your opinion and your suggestions. Let me know if there are things that need clarification.

LE: I assume there are cases where the logic can be moved outside the Activity/Fragment.

2

I’m hardly an android expert, however from a Kotlin point of view ActionState could be an enum which would make the code slightly more readable.