kotlins_simple_layout_trick_pt2_bind_implementation.kt

BindableLayout.kt

open class BindableLayout<T, V : ViewGroup>(layout: V) : Layout<V>(layout) {

    private val observers = Observers()

    fun bind(observer: Observer<T>) {
        observers.add(observer)
    }

    private inner class Observers : ArrayList<Observer<T>>(), Consumer<T> {

        override fun accept(value: T) =
                forEach { observer -> observer(value, value) }

    }
    
}