01_MainViewModel.kt

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

02_ScaleAlpha.kt

data class ScaleAlpha(toScale : Float, toAlpha : Float , fromScale : Float = 0f, fromAlpha : Float = 0f)

03_DatabindingUtils.kt

@BindingAdapter("scaleAndAlpha")
fun animateScaleAndAlpha(view : View, scaleAndAlpha : ScaleAlpha) {
  view.scaleX = scaleAndAlpha.fromScale
  view.scaleY = scaleAndAlpha.fromScale
  view.alpha = scaleAndAlpha.fromAlpha
  view.animate()
    .scaleX(scaleAndAlpha.toScale)
    .scaleY(scaleAndAlpha.toScale)
    .alpha(scaleAndAlpha.toAlpha)
    .setDuration(300)
    .start()
}

04_main.xml

<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"
            />

    </data>
<ImageView
    android:layout_width="50dp"
    android:layout_height="50dp"
    app:scaleAndAlpha="@{vm.scaleAndAlpha}"
    android:onClick="@{() -> vm.imageClick()}"
    />
/layout>