平滑滚动recyclerview android

Question

我有一个Recyclerview，ratingbar

中包含list_items.xml

完成Recyclerview中某个项目的评分后，我会自动滚动到Recyclerview的另一个项目

滚动非常快，用户无法知道它已滚动。

我实现了平滑滚动，但工作不正常， 第2个项目的第一个滚动顺畅（第1个已经显示），但其他项目滚动很快

LinearLayoutSmoothScroll.java

public class LinearLayoutSmoothScroll extends LinearLayoutManager {
        private static final float MILLISECONDS_PER_INCH = 100f;
        private Context mContext;

        public LinearLayoutSmoothScroll(Context context) {
                super(context);
                mContext=context;
        }

        public LinearLayoutSmoothScroll(Context context, int orientation, boolean reverseLayout) {
                super(context, orientation, reverseLayout);
                mContext=context;
        }

        public LinearLayoutSmoothScroll(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
                super(context, attrs, defStyleAttr, defStyleRes);
                mContext=context;
        }
        @Override
        public void smoothScrollToPosition(RecyclerView recyclerView,
                                           RecyclerView.State state, final int position) {

                LinearSmoothScroller smoothScroller =
                        new LinearSmoothScroller(mContext) {

                                //This controls the direction in which smoothScroll looks
                                //for your view
                                @Override
                                public PointF computeScrollVectorForPosition
                                (int targetPosition) {
                                        return LinearLayoutSmoothScroll.this
                                                .computeScrollVectorForPosition(targetPosition);
                                }

                                //This returns the milliseconds it takes to
                                //scroll one pixel.
                                @Override
                                protected float calculateSpeedPerPixel
                                (DisplayMetrics displayMetrics) {
                                        return MILLISECONDS_PER_INCH/displayMetrics.densityDpi;
                                }
                        };

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

用法：

layoutManager.smoothScrollToPosition(rvSurvey,new RecyclerView.State(),new_position);