NestedScrollView嵌套RecyclerView时没

LinearLayoutManager layoutManager = new LinearLayoutManager(this);

        layoutManager.setSmoothScrollbarEnabled(true);

        layoutManager.setAutoMeasureEnabled(true);

        recyclerView.setLayoutManager(layoutManager);

        recyclerView.setHasFixedSize(true);

        recyclerView.setNestedScrollingEnabled(false);   //嵌套滑动