RUSwipeShare/lib/main.dart

import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_ui_auth/firebase_ui_auth.dart';
import 'package:flutter/material.dart';
import 'package:ruswipeshare/home.dart';
import 'package:ruswipeshare/sell.dart';

import 'firebase_options.dart';
import 'auth_gate.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform);

  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const HomeScreen(),
    );
  }
}

class MyNavBar extends StatefulWidget {
  MyNavBar({super.key});

  @override
  State<MyNavBar> createState() => MyNavBarState();
}

class MyNavBarState extends State<MyNavBar> {
  final pages = [
    const SellScreen(),
    const SellScreen(),
  ];

  int _selectedIndex = 0;

  void _onItemTapped(int index) {
    if (runtimeType == pages.elementAt(index).runtimeType) return;

    setState(() {
      _selectedIndex = index;
    });

    Navigator.push(
      context,
      MaterialPageRoute(builder: (context) => pages.elementAt(index)),
    );
  }

  @override
  Widget build(BuildContext context) {
    return BottomNavigationBar(
      type: BottomNavigationBarType.fixed,
      backgroundColor: Colors.red,
      selectedItemColor: Colors.black,
      unselectedItemColor: Colors.black54,
      items: const <BottomNavigationBarItem>[
        BottomNavigationBarItem(
          icon: Icon(Icons.shopping_cart),
          label: 'Buy',
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.attach_money),
          label: 'Sell',
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.person),
          label: 'Profile',
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.settings),
          label: 'Settings',
        ),
      ],
      currentIndex: _selectedIndex,
      onTap: _onItemTapped,
    );
  }
}