doctor_app_flutter/lib/widgets/shared/bottom_nav_bar.dart

import 'package:doctor_app_flutter/icons_app/doctor_app_icons.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

import 'bottom_navigation_item.dart';

class BottomNavBar extends StatefulWidget {
  final ValueChanged<int> changeIndex;

  BottomNavBar({Key key, this.changeIndex}) : super(key: key);

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

class _BottomNavBarState extends State<BottomNavBar> {
  int _index = 0;

  _changeIndex(int index) {
    widget.changeIndex(index);
    setState(() {
      _index = index;
    });
  }

  @override
  Widget build(BuildContext context) {
    return BottomAppBar(
      elevation: 4,
      shape: CircularNotchedRectangle(),
      color: Colors.white,
      child: Padding(
        padding: EdgeInsets.symmetric(horizontal: 18),
        child: Row(
          mainAxisSize: MainAxisSize.max,
          mainAxisAlignment: MainAxisAlignment.spaceAround,
          children: [
            BottomNavigationItem(
              icon: DoctorApp.home_icon,
              activeIcon: DoctorApp.home_icon_active,
              changeIndex: _changeIndex,
              index: _index,
              currentIndex: 0,
              name: 'HOME',
            ),
            BottomNavigationItem(
              icon: DoctorApp.message_icon,
              activeIcon: DoctorApp.message_icon_active,
              changeIndex: _changeIndex,
              index: _index,
              currentIndex: 1,
              name: 'REPLAY',
            ),
            BottomNavigationItem(
              icon: DoctorApp.schedule_icon,
              activeIcon: DoctorApp.scdedule_icon_active,
              changeIndex: _changeIndex,
              index: _index,
              currentIndex: 2,
              name: 'SCHEDULE',
            ),
            BottomNavigationItem(
              icon: DoctorApp.menu_icon,
              activeIcon: DoctorApp.menu_icon_active,
              changeIndex: _changeIndex,
              index: _index,
              currentIndex: 3,
              name: 'SERVICES',
            )
          ],
        ),
      ),
    );
  }
}