스크롤 상단 이동 private fun scrollEvent() { val btnUp = binding.btnUp val fadeIn = AlphaAnimation(0f,1f).apply { duration = 300 } //[1] val fadeOut = AlphaAnimation(1f,0f).apply { duration = 300 } //[2] //스크롤 이벤트 감지 binding.recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() { //[3] override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) { //[4] super.onScrol..
