PhysiGo/app/lib/main.dart

import 'package:flutter/material.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:physigo/firebase_options.dart';
import 'package:physigo/walking/walking_page.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );
  runApp(const PhysiGo());
}

class PhysiGo extends StatelessWidget {
  const PhysiGo({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'PhysiGo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: HomePage(),
    );
  }
}

class HomePage extends StatelessWidget {
  const HomePage({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: TextButton(
            onPressed: () {
              Navigator.push(
                context,
                MaterialPageRoute(
                  // Example on how to use NavigationPage
                  builder: (context) => WalkingPage(),
                ),
              );
            },
            child: const Text('Navigation')),
      ),
    );
  }
}