طريقة عمل ال App Bar في  flutter

Widget build(BuildContext context) {
     return  Scaffold(
    appBar: AppBar(
      title: const Text('Book Shop'),
      elevation: 10, //ارتفاع
      foregroundColor: Colors.black,
      backgroundColor: Colors.red,
      leading: const Icon(Icons.menu),
      iconTheme: IconThemeData(color: Colors.white, size: 50, opacity: 1),
      actions: const [
        Padding(
          padding: EdgeInsets.all(4),
          child: CircleAvatar(
            backgroundColor: Colors.tealAccent,
            radius: 25,
          ),
        ),
      ],

    ),
  );
}