pages/products.dart

如此gif

  Widget build(BuildContext context) {
    return Scaffold(
      drawer: Drawer(
        //增加收合式選單
        child: Column(
          children: <Widget>[
            AppBar(
              automaticallyImplyLeading: false,
              //有bar但是不要有漢堡圖示
              title: Text('Choose'),
            ),
            ListTile(
              title: Text('Manage Products'),
              //列表
              onTap: () {},
            )
          ],
        ),
      ),
      appBar: AppBar(
        title: Text('EasyList'),
      ),
      body: ProductManager(),
    );
  }

主題來源：
Learn Flutter & Dart to Build iOS & Android Apps