RecyclerView滚动速度可控

重写recylerView对应的layoutManager的smoothScrollToPosition方法，定义滚动速度：

@Override
    public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
        if (linearSmoothScroller == null) {
            linearSmoothScroller =
                    new LinearSmoothScroller(recyclerView.getContext()) {

                        /**
                         * 计算滚动的速度
                         *
                         * @param displayMetrics 屏幕分辨率
                         * @return 1px滑过的时间(ms)
                         */
                        @Override
                        protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
                            //densityDpi 360dpi/480dpi...
                            return 200F / (float) displayMetrics.densityDpi;
                        }

                    };
        }
        linearSmoothScroller.setTargetPosition(position);
        startSmoothScroll(linearSmoothScroller);
    }

不管是GridLayoutManager还是LinearLayoutManager，都管用