MvRx (pronounced mavericks) is the Android framework from Airbnb that we use for nearly all product development at Airbnb.

When we began creating MvRx, our goal was not to create yet another architecture pattern for Airbnb, it was to make building products easier, faster, and more fun. All of our decisions have built on that. We believe that for MvRx to be successful, it must be effective for building everything from the simplest of screens to the most complex in our app.

This is what it looks like:

data class HelloWorldState(val title: String = "Hello World") : MvRxState

class HelloWorldViewModel(initialState: HelloWorldState) : MvRxViewModel<HelloWorldState>(initialState) {
    fun getMoreExcited() = setState { copy(title = "$title!") }
}

class HelloWorldFragment : BaseFragment() {
    private val viewModel: HelloWorldViewModel by fragmentViewModel()

    override fun EpoxyController.buildModels() = withState(viewModel) { state ->
        header {
            title(state.title)
        }
        basicRow { 
            onClick { viewModel.getMoreExcited() }
        }
    }
}

Gradle is the only supported build configuration, so just add the dependency to your project build.gradle file:

dependencies {
  implementation 'com.airbnb.android:mvrx:0.5.0'
}

The latest version of mvrx is