persistent_bottom_nav_bar 1.4.5

A DO ALL persistent/static bottom navigation bar for flutter. In addition to being optionally platform specific, it includes more than 10 styles including neumorphic design.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:persistent_bottom_nav_bar/persistent-tab-view.dart';
import 'custom-widget.dart';
import 'screens.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Persistent Bottom Navigation Bar example project',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

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

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

class _MyHomePageState extends State<MyHomePage> {
  PersistentTabController _controller;

  @override
  void initState() {
    super.initState();
    _controller = PersistentTabController(initialIndex: 0);
  }

  List<Widget> _buildScreens() {
    return [HomeScreen(), HomeScreen(), HomeScreen(), HomeScreen()];
  }

  List<PersistentBottomNavBarItem> _navBarsItems() {
    return [
      PersistentBottomNavBarItem(
        icon: Icon(Icons.home),
        title: ("Home"),
        activeColor: Colors.blue,
        inactiveColor: Colors.grey,
        isTranslucent: false,
      ),
      PersistentBottomNavBarItem(
        icon: Icon(Icons.search),
        title: ("Search"),
        activeColor: Colors.teal,
        inactiveColor: Colors.grey,
      ),
      PersistentBottomNavBarItem(
        icon: Icon(Icons.message),
        title: ("Chat"),
        activeColor: Colors.deepOrange,
        inactiveColor: Colors.grey,
      ),
      PersistentBottomNavBarItem(
        icon: Icon(Icons.settings),
        title: ("Settings"),
        activeColor: Colors.indigo,
        inactiveColor: Colors.grey,
      ),
    ];
  }

  @override
  Widget build(BuildContext context) {
    return PersistentTabView(
      controller: _controller,
      screens: _buildScreens(),
      items: _navBarsItems(), // Redundant here but defined to demonstrate for other than custom style
      confineInSafeArea: true,
      handleAndroidBackButtonPress: true,
      onItemSelected: (int) {
        setState(() {}); // This is required to update the nav bar if Android back button is pressed
      },
      customWidget: CustomNavBarWidget(
        items: _navBarsItems(),
        onItemSelected: (index) {
          setState(() {
            _controller.index = index; // THIS IS CRITICAL!! Don't miss it!
          });
        },
        selectedIndex: _controller.index,
      ),
      itemCount: 4,
      navBarStyle: NavBarStyle.custom, // Choose the nav bar style with this property
    );
  }
}