hyzp_ybqx/lib/widget/app_bar.dart

import 'package:flutter/material.dart';

class SettingMenu extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return IconButton(
      // action button
      icon: Icon(Icons.settings),
      onPressed: () {
        debugPrint("Click Menu Setting");
      },
    );
  }
}

class PeakAppBar extends StatelessWidget implements PreferredSizeWidget {
  PeakAppBar({Key key, @required this.title, this.actions}) : super(key: key);

  final String title;
  final List<Widget> actions;

  PeakAppBar.defaultSetting({Key key, @required this.title}) : actions = null;
  // todo settings page
  //: actions=<Widget>[SettingMenu()];

  @override
  Widget build(BuildContext context) {
    return PreferredSize(
      child: AppBar(
        title: Text(this.title),
        actions: this.actions,
      ),
      preferredSize: preferredSize,
    );
  }

  @override
  Size get preferredSize => Size.fromHeight(45.0);
}