Change thumb color when scrolled

[feliperce]

How to change fastScrollThumbColor when scrolled, I tried to set:

override fun onScrollStateChanged(recyclerView: RecyclerView?, newState: Int) {
                when (newState) {
                    RecyclerView.SCROLL_STATE_IDLE ->
                        categoryFilterRecyclerView.setThumbColor(Color.DKGRAY)
                    RecyclerView.SCROLL_STATE_DRAGGING ->
                        categoryFilterRecyclerView.setThumbColor(ResourcesCompat.getColor(
                                resources, R.color.colorPrimaryDark, null))
                    RecyclerView.SCROLL_STATE_SETTLING->
                        categoryFilterRecyclerView.setThumbColor(ResourcesCompat.getColor(
                                resources, R.color.colorPrimaryDark, null))

                }

            }
        })

It changes when scrolled, but not change when FAST scrolled

[timusus]

You can attach an OnFastScrollStateChangedListener to the FastScrollRecyclerView.

Alternatively, fork this library and find the code that detects when the fast scroll is touched, and change the colour there.