PinItems.kt

private fun createActualInput(lengthCount: Int) = EditText(context)
   .apply {
       inputType = InputType.TYPE_CLASS_NUMBER
       isClickable = false
       maxHeight = 0
       maxWidth = 0
       alpha = 0F
       addOrUpdateFilter(InputFilter.LengthFilter(lengthCount))
   }

private fun createPinItems(count: Int) {
   actualText = createActualInput(count)
   actualText.textChanges()
       .subscribe {
           updatePins(it.toString())
           pinChangesRelay.accept(it)
       }
   overlay.clicks().subscribe { focus() }
}