Android - 可以使RecyclerViews顺利滚动吗？

Question

我有两个箭头按钮，用于滚动左右3个项目（或分别滚动到列表的开头或结尾）。向左滚动 - 目标位置小于当前位置 - 仅起作用。向右滚动时，甚至不会调用smoothScrollToPosition()。有没有人碰到这个？我是否必须以某种方式撤销列表？

我对LinearLayoutManager的扩展：

public class SmoothScrollLayoutManager extends LinearLayoutManager {

private static final float MILLISECONDS_PER_INCH =  50f;
private Context context;

public SmoothScrollLayoutManager(Context context, int orientation, boolean reverseLayout) {
    super(context, orientation, reverseLayout);
    this.context = context;
}

@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, final int position) {

    LinearSmoothScroller smoothScroller = new LinearSmoothScroller(context) {

        @Override
        public PointF computeScrollVectorForPosition(int targetPosition) {
            return SmoothScrollLayoutManager.this.computeScrollVectorForPosition(targetPosition);
        }

        @Override
        protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
            return MILLISECONDS_PER_INCH / displayMetrics.densityDpi;
        }


    };

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

来自LinearLayoutManager的

computeScrollVectorForPosition（int targetPosition）

   public PointF computeScrollVectorForPosition(int targetPosition) {
    if (getChildCount() == 0) {
        return null;
    }
    final int firstChildPos = getPosition(getChildAt(0));
    final int direction = targetPosition < firstChildPos != mShouldReverseLayout ? -1 : 1;
    if (mOrientation == HORIZONTAL) {
        return new PointF(direction, 0);
    } else {
        return new PointF(0, direction);
    }
}

我通过调用recyclerView.smoothScrollToPosition(position);

滚动

非常感谢任何帮助。我大部分时间都被困在这上面。