如何使网格视图滚动条在整个页面中占据一席之地？

Question

我在列表视图下面有一个网格视图，但是当我滚动网格视图时，我希望它占据整个页面。我在网格视图的顶部有一个listView，所以当我滚动时，列表视图并没有被隐藏，我只能滚动网格视图。我试图在堆栈中调用它们，但它覆盖了我的整个屏幕，一切都一片空白。 希望能达到类似的目的。
https://i.stack.imgur.com/JDQLS.jpg

class _GameScreenState extends State<GameScreen> {
  CategoryType categoryType = CategoryType.ui;
  Animation<double> topBarAnimation;
  @override
  Widget build(BuildContext context) {
    return Material(
      child: Container(
        color: DesignCourseAppTheme.nearlyWhite,
        child: PageView(
          physics: const BouncingScrollPhysics(),
          scrollDirection: Axis.vertical,
          children: [
            Scaffold(
              bottomNavigationBar: Container(
                  decoration: BoxDecoration(
                    gradient: LinearGradient(
                      colors: [
                        const Color(0xFFFEFEFE),
                        const Color(0xFFFEFEFE)
                      ],
                      begin: Alignment.centerLeft,
                      end: Alignment.centerRight,
                      // stops: [0.0, 0.1],
                    ),
                  ),
                  child: BottomBar()),
              backgroundColor: DesignCourseAppTheme.nearlyWhite,
              body: Container(
                child: Column(
                  children: <Widget>[
                    SizedBox(
                      height: MediaQuery.of(context).padding.top,
                    ),
                    getAppBarUI(),
                    Expanded(
                      child: Stack(
                        children: [
                          Container(
                            height: MediaQuery.of(context).size.height,
                            child: Column(
                              children: <Widget>[
                                getCategoryUI(),//**THIS CALLS MY LISTVIEW** 
                                Flexible(
                                  child: getPopularCourseUI(),//***THIS CALLS MY GRIDVIEW***
                                ),
                              ],
                            ),
                          ),
                        ],
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }