BottomAppBarr更改缺口形状的颜色

Question

如何更改此部分的颜色？

我的底部栏在这里：

bottomNavigationBar: BottomAppBar(
      shape: CircularNotchedRectangle(),
      elevation: 8,
      child: BottomNavigationBar(
        elevation: 0,
        backgroundColor: Colors.transparent,
        currentIndex: currentIndex,
        onTap: changePage,
        items: <BottomNavigationBarItem>[
        BottomNavigationBarItem(backgroundColor: Colors.orange, icon: Icon(Icons.view_day), activeIcon: Icon(Icons.view_day, color: Colors.orange,), title: Text("Home")),
        BottomNavigationBarItem(backgroundColor: Colors.orange, icon: Icon(Icons.settings), activeIcon: Icon(Icons.settings, color: Colors.orange,), title: Text("Settings"))],
      ),
    ),

Answer 1

问题是脚手架背景颜色