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Junior — Middle

Can you explain the differences between the architectural patterns MVVM, MVI, and MVP?

sobes.tech AI

Answer from AI

MVVM (Model-View-ViewModel), MVI (Model-View-Intent), and MVP (Model-View-Presenter) are architectural patterns that help organize code in applications by separating responsibilities among components.

  • MVP: The View handles display and user actions are passed to the Presenter. The Presenter contains logic and updates the View. The Model holds data and business logic. The View and Presenter are directly connected.

  • MVVM: The View binds to the ViewModel through two-way data binding. The ViewModel contains logic and state, and the Model contains data. The ViewModel does not directly know about the View, which facilitates testing.

  • MVI: Based on a unidirectional data flow. The View generates Intents (user intentions), which are processed in the Model, updating the state, which is then rendered in the View. This simplifies state management and makes data flow predictable.

Example in Android MVVM with LiveData:

class MyViewModel : ViewModel() {
    val data = MutableLiveData<String>()

    fun loadData() {
        // load data
        data.value = "Hello MVVM"
    }
}

// In Activity or Fragment
viewModel.data.observe(this) { value ->
    textView.text = value
}