Connect tabLayout to recycleView as ItemIndicator

ViewUtil.kt

fun TabLayout.asItemIndicator(recyclerView: RecyclerView) {
        //setup tab as dot indicator
        removeAllTabs()
        recyclerView.adapter?.itemCount?.downTo(1)?.forEach { _ ->
            addTab(newTab())
        }

        //make tabActiveIndex as/jump rvAdapterIndex
        addOnTabSelectedListener(object : TabLayout.OnTabSelectedListener {
            override fun onTabSelected(tab: TabLayout.Tab?) {
                try {
                    recyclerView.smoothScrollToPosition(tab!!.position)
                } catch (e: Exception) {
                }
            }

            override fun onTabUnselected(tab: TabLayout.Tab?) {
            }

            override fun onTabReselected(tab: TabLayout.Tab?) {
            }

        })

        //make rvScrollIndex sync witch tabActiveIndex
        recyclerView.clearOnScrollListeners()
        LinearSnapHelper().attachToRecyclerView(recyclerView)
        val rvScrollListener = object : RecyclerView.OnScrollListener() {
            override fun onScrollStateChanged(rv: RecyclerView, newState: Int) {
                try {
                    // find active page (which should be highlighted)
                    val activePosition = (rv.layoutManager as LinearLayoutManager)
                        .findFirstCompletelyVisibleItemPosition()
                    val tab = getTabAt(activePosition)
                    selectTab(tab, true)
                } catch (e: Exception) {
                }
            }

            override fun onScrolled(rv: RecyclerView, dx: Int, dy: Int) {
                try {
                    val lm = (rv.layoutManager as LinearLayoutManager)
                    val activePosition = lm.findFirstCompletelyVisibleItemPosition()
                    setScrollPosition(
                        activePosition,
                        0F,
                        false,
                        true
                    )
                } catch (e: Exception) {
                    e.printStackTrace()
                }
            }
        }
        recyclerView.addOnScrollListener(rvScrollListener)
    }