test_appbar_buttons.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      drawer: Drawer(),
      appBar: AppBar(
        title: Text("Shop name"),
        actions: <Widget>[
          IconButton(
            icon: Icon(Icons.search),
            onPressed: () {},
          ),
          IconButton(
            icon: Icon(Icons.favorite),
            onPressed: () {
              Navigator.of(context).push(
                PageRouteBuilder(
                  pageBuilder: (BuildContext context, _, __) {
                    return Scaffold(
                      appBar: AppBar(
                        title: Text("Route 1"),
                      ),
                    );
                  },
                ),
              );
            },
          ),
          IconButton(
            icon: Icon(Icons.person),
            onPressed: () {
              Navigator.of(context).push(
                PageRouteBuilder(
                  pageBuilder: (BuildContext context, _, __) {
                    return Scaffold(
                      appBar: AppBar(
                        title: Text("Route 2"),
                      ),
                    );
                  },
                ),
              );
            },
          ),
        ],
      ),
    );
  }
}