SeongUgJung

class MainViewModel(private val layoutCenterViewUsecase : LayoutCenterViewUsecase) {
  
  val centerY = ObservableInt()
  
  init {
    layoutCenterViewUsecase.observe()
      .subscribe { y : Int ->
        centerY.set(y)
      }
  }

SeongUgJung

@BindingAdapter({"bindUri", "bindImageLoader"}, requireAll = true)
fun loadImage(view: ImageView, uri : String, imageLoader : ImageLoader) {
  imageLoader.load(uri).into(view)
}

SeongUgJung

<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    >

    <data>

        <variable
            name="vm"
            type="MainViewModel"

SeongUgJung

class MainViewModelTest {
  private lateinit var vm : MainViewModel
  private lateinit var resourcesProvider : ResourcesProvider
  
  @Setup
  fun init() {
    resourcesProvider = mock(ResourcesProvider::class)
    vm = MainViewModelImpl(resourcesProvider)
  }
  

SeongUgJung

class MainViewModel(private val resourcesProvider: ResourcesProvider) {
  
  val name = ObservableField()
  
  
  fun click() {
    name.set(resourceProvider.getString(R.string.name_title))
  }
}

SeongUgJung

class MainViewModel {
  val visible = ObservableBoolean(false)
}

SeongUgJung

class RoundImageView : ImageView {
  
  private radious : Int
  
  fun setRadious(rad : Int) {
    this.radious = rad
  }
  // 이하 생략
}

SeongUgJung

class MainViewModel {
 
  val scaleAndAlpha = ObservableField<ScaleAlpha>()
  
  fun imageClick() {
    scaleAndAlpha.set(ScaleAlpha(1f,1f))
  }
}

SeongUgJung

class ItemAdapter : RecyclerView.Adapter() {
  var items : List<Item> = emptyList()
}

SeongUgJung

<?xml version="1.0" encoding="utf-8"?>
<layout
    xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- 데이터바인딩 정의 -->
    <data>
        <variable
            name="vm"
            type="MainViewModel" />
    </data>