LocalSpend-Tracker/lib/pages/home_page.dart

import 'package:flutter/material.dart';
import 'package:local_spend/pages/receipt_page_2.dart';
import 'package:local_spend/pages/more_page.dart';
import 'package:local_spend/pages/stats_page.dart';
import 'package:local_spend/pages/map_page.dart';

class HomePage extends StatelessWidget {
  static String _title = 'SpendTracker';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      home: HomePageWidget(),
    );
  }
}

class HomePageWidget extends StatefulWidget {
  HomePageWidget({Key key}) : super(key: key);

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

class _HomePageState extends State<HomePageWidget> {
  int _selectedIndex = 0;

  static const TextStyle optionStyle =
      TextStyle(fontSize: 30, fontWeight: FontWeight.bold);
  static List<Widget> _widgetOptions = <Widget>[
    ReceiptPage2(),
    StatsPage(),
    MapSample(),
    MorePage()
  ];

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

  @override
  Widget build(BuildContext context) {

    return Scaffold(
      body: Center(
        child: _widgetOptions.elementAt(_selectedIndex),
      ),
      bottomNavigationBar: BottomNavigationBar(
        items: const <BottomNavigationBarItem>[
          BottomNavigationBarItem(
            icon: Icon(Icons.receipt),
            title: Text('Submit Receipt'),
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.show_chart),
            title: Text('Statistics'),
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.map),
            title: Text('Locations'),
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.more_horiz),
            title: Text('More'),
          ),
        ],
        currentIndex: _selectedIndex,
        unselectedItemColor: Colors.grey[400],
        selectedItemColor: Colors.blue[400],
        onTap: _onItemTapped,
      ),
    );
  }
}