PhysiGo/app/lib/main.dart

import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'package:latlong2/latlong.dart';
import 'package:physigo/exercises/exercises_page.dart';
import 'package:physigo/friends/friends_page.dart';
import 'navigation/navigation_page.dart';

import 'firebase_options.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: const HomePage(),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Scaffold(
        body: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Center(
              child: TextButton(
                  onPressed: () {
                    Navigator.push(
                      context,
                      MaterialPageRoute(
                        // Example on how to use NavigationPage
                        builder: (context) => NavigationPage(
                          destination: LatLng(51.78036111980833, 19.451262207821234),
                        ),
                      ),
                    );
                  },
                  child: const Text('Navigation')),
            ),
            Center(
              child: TextButton(
                onPressed: () {
                  Navigator.push(
                    context,
                    MaterialPageRoute(
                      builder: (context) => const ExercisesPage(),
                    ),
                  );
                },
                child: const Text('Exercises'),
              ),
            ),
            Center(
              child: TextButton(
                onPressed: () {
                  Navigator.push(
                    context,
                    MaterialPageRoute(
                      builder: (context) => const FriendsPage(),
                    ),
                  );
                },
                child: const Text('Friends'),
              ),
            ),
          ],
        ),
      ),
    );
  }
}