【Android】smoothScrollToPositionの移動速度を変えたい

アイテムを移動させる時に移動速度も変えたい

SpeedyGridLayoutManager.kt

class SpeedyGridLayoutManager : GridLayoutManager {
    var MILLIS = 155f

    constructor(context: Context, spanCount: Int, orientation: Int, reverseLayout: Boolean) : super(context, spanCount, orientation, reverseLayout) {}

    override fun smoothScrollToPosition(recyclerView: RecyclerView, state: RecyclerView.State?, position: Int) {

        val linearSmoothScroller = object: LinearSmoothScroller(recyclerView.context) {

            override fun computeScrollVectorForPosition(targetPosition: Int): PointF? {
                return [e-mail]sition(targetPosition)
            }

            override fun calculateSpeedPerPixel(displayMetrics: DisplayMetrics): Float {
                return MILLIS / displayMetrics.densityDpi
            }
        }

        linearSmoothScroller.targetPosition = position
        startSmoothScroll(linearSmoothScroller)
    }
}

MILLSを変えれば移動速度も変わります。
あとは、#setLayoutManagerしてあげれば使えます。