ScrollListener.kt

        recyclerview.addOnScrollListener(object : RecyclerView.OnScrollListener() {
            override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
                super.onScrollStateChanged(recyclerView, newState)
                when (newState) {
                    RecyclerView.SCROLL_STATE_DRAGGING -> {
                        Log.d(TAG, "dragging")
                    }
                    RecyclerView.SCROLL_STATE_IDLE -> {
                        Log.d(TAG, "idle")
                    }
                    RecyclerView.SCROLL_STATE_SETTLING -> {
                        Log.d(TAG, "settling")
                    }
                }
                if (!recyclerView.canScrollVertically(1) && newState == RecyclerView.SCROLL_STATE_IDLE) {
                    Log.d(TAG, "bottom")
                }
                if (!recyclerView.canScrollVertically(-1) && newState == RecyclerView.SCROLL_STATE_IDLE) {
                    Log.d(TAG, "top")
                }
            }

            override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
                super.onScrolled(recyclerView, dx, dy)
                when {
                    dx > 0 -> {
                        Log.d(TAG, "Scrolled Right")
                    }
                    dx < 0 -> {
                        Log.d(TAG, "Scrolled Left")
                    }
                    else -> {
                        Log.d(TAG, "No Horizontal Scrolled")
                    }
                }

                when {
                    dy > 0 -> {
                        Log.d(TAG, "Scrolled Downwards")
                    }
                    dy < 0 -> {
                        Log.d(TAG, "Scrolled Upwards")
                    }
                    else -> {
                        Log.d(TAG, "No Vertical Scrolled")
                    }
                }
            }
        })