Nested Tab Bar In Flutter

Nested Tab Bar In Flutter :

Screenshot :

nestedTabBarView.dart

import 'package:flutter/material.dart';

class NestedTabBar extends StatefulWidget {

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

class _NestedTabBarState extends State<NestedTabBar>
    with TickerProviderStateMixin {
  TabController _nestedTabController;

  @override
  void initState() {
    super.initState();

    _nestedTabController = new TabController(length: 5, vsync: this);
  }

  @override
  void dispose() {
    super.dispose();
    _nestedTabController.dispose();
  }

  @override
  Widget build(BuildContext context) {
    double screenHeight = MediaQuery.of(context).size.height;
    return Column(
      mainAxisAlignment: MainAxisAlignment.spaceAround,
      children: <Widget>[
        TabBar(
          controller: _nestedTabController,
          indicatorColor: Colors.teal,
          labelColor: Colors.teal,
          unselectedLabelColor: Colors.black54,
          isScrollable: true,
          tabs: <Widget>[
            Tab(
              text: "One",
            ),
            Tab(
              text: "Two",
            ),
            Tab(
              text: "Three",
            ),
            Tab(
              text: "Four",
            ),
            Tab(
              text: "Five",
            ),
          ],
        ),
        Container(
          height: screenHeight * 0.70,
          margin: EdgeInsets.only(left: 16.0, right: 16.0),
          child: TabBarView(
            controller: _nestedTabController,
            children: <Widget>[
              Container(
                decoration: BoxDecoration(
                  borderRadius: BorderRadius.circular(8.0),
                  color: Colors.blueAccent,
                ),
              ),
              Container(
                decoration: BoxDecoration(
                  borderRadius: BorderRadius.circular(8.0),
                  color: Colors.orangeAccent,
                ),
              ),
              Container(
                decoration: BoxDecoration(
                  borderRadius: BorderRadius.circular(8.0),
                  color: Colors.greenAccent,
                ),
              ),
              Container(
                decoration: BoxDecoration(
                  borderRadius: BorderRadius.circular(8.0),
                  color: Colors.indigoAccent,
                ),
              ),
              Container(
                decoration: BoxDecoration(
                  borderRadius: BorderRadius.circular(8.0),
                  color: Colors.redAccent,
                ),
              ),
            ],
          ),
        )
      ],
    );
  }
}

main.dart

import 'package:flutter/material.dart';

import 'nestedTabBarView.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Nested Tab Bar',
      theme: ThemeData(
        primarySwatch: Colors.teal,
      ),
      home: MyHomePage(title: 'Nested Tab Bar'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

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

class _MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
  TabController _tabController;

  @override
  void initState() {
    super.initState();

    _tabController = new TabController(length: 3, vsync: this);
  }

  @override
  void dispose() {
    super.dispose();
    _tabController.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      bottomNavigationBar: Material(
        color: Colors.white,
        child: TabBar(
            controller: _tabController,
            indicatorColor: Colors.teal,
            labelColor: Colors.teal,
            unselectedLabelColor: Colors.black54,
            tabs: <Widget>[
              Tab(
                icon: Icon(Icons.home),
              ),
              Tab(
                icon: Icon(Icons.email),
              ),
              Tab(
                icon: Icon(Icons.settings),
              ),
            ]),
      ),
      body: TabBarView(
        children: <Widget>[
          NestedTabBar(),

          Center(
            child: Text("Email"),
          ),
          Center(
            child: Text("Settings"),
          )
        ],
        controller: _tabController,
      ),
    );
  }
}

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