Envelope/mobile/lib/views/main/home.dart

import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import '/views/main/conversation_list.dart';
import '/views/main/friend_list.dart';
import '/views/main/profile.dart';

class Home extends StatefulWidget {
    const Home({Key? key}) : super(key: key);

    @override
    State<Home> createState() => _HomeState();
}

class _HomeState extends State<Home> {
    @override
    void initState() {
        checkLogin();
        super.initState();
    }

    Future checkLogin() async {
        SharedPreferences preferences = await SharedPreferences.getInstance();
        if (preferences.getBool('islogin') != true) {
            Navigator.pushNamedAndRemoveUntil(context, '/landing', ModalRoute.withName('/landing'));
        }
    }

    int _selectedIndex = 0;
    static const List<Widget> _widgetOptions = <Widget>[
        ConversationList(),
        FriendList(),
        Profile(),
    ];

    void _onItemTapped(int index) {
        setState(() {
            _selectedIndex = index;
        });
    }

    @override
    Widget build(BuildContext context) {
        return WillPopScope(
                onWillPop: () async => false,
                child: Scaffold(
                        body: _widgetOptions.elementAt(_selectedIndex),
                        bottomNavigationBar: BottomNavigationBar(
                                currentIndex: _selectedIndex,
                                onTap: _onItemTapped,
                                selectedItemColor: Colors.red,
                                unselectedItemColor: Colors.grey.shade600,
                                selectedLabelStyle: const TextStyle(fontWeight: FontWeight.w600),
                                unselectedLabelStyle: const TextStyle(fontWeight: FontWeight.w600),
                                type: BottomNavigationBarType.fixed,
                                items: const [
                                    BottomNavigationBarItem(
                                            icon: Icon(Icons.message),
                                            label: "Chats",
                                    ),
                                    BottomNavigationBarItem(
                                            icon: Icon(Icons.group_work),
                                            label: "Friends",
                                    ),
                                    BottomNavigationBarItem(
                                            icon: Icon(Icons.account_box),
                                            label: "Profile",
                                    ),
                                ],
                        ),
                ),
        );
    }
}