MainActivity.Kt

private fun hideSubtitle() {
  val subtitleHeight = tvSubtitle.height
  val heightAnimator = ValueAnimator.ofInt(subtitleHeight, 0)
  
  heightAnimator.addUpdateListener {
    tvsubtitle.updateHeight(it.animatedValue as Int)
  }
  heightAnimator.doonEnd {
    tvSubtitle.isVisible = false
  }
  heightAnimator.start()
}