如何使RecyclerView水平居中？

LinearLayoutManager layoutManager = new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false);
recyclerView.setLayoutManager(layoutManager);

public class CenterItemDecoration extends RecyclerView.ItemDecoration {
    @Override
    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
        int parentWidth = parent.getWidth();
        int itemWidth = view.getWidth();
        int margin = (parentWidth - itemWidth) / 2;
        outRect.set(margin, 0, margin, 0);
    }
}

recyclerView.addItemDecoration(new CenterItemDecoration());