bottom tab bar in flutter code example

Example 1: tab design in flutter

DefaultTabController(      length: 3,      child: Scaffold(        appBar: AppBar(          backgroundColor: Colors.white,          elevation: 0,          bottom: TabBar(              unselectedLabelColor: Colors.redAccent,              indicatorSize: TabBarIndicatorSize.label,              indicator: BoxDecoration(                  borderRadius: BorderRadius.circular(50),                  color: Colors.redAccent),              tabs: [                Tab(                  child: Container(                    decoration: BoxDecoration(                        borderRadius: BorderRadius.circular(50),                        border: Border.all(color: Colors.redAccent, width: 1)),                    child: Align(                      alignment: Alignment.center,                      child: Text("APPS"),                    ),                  ),                ),                Tab(                  child: Container(                    decoration: BoxDecoration(                        borderRadius: BorderRadius.circular(50),                        border: Border.all(color: Colors.redAccent, width: 1)),                    child: Align(                      alignment: Alignment.center,                      child: Text("MOVIES"),                    ),                  ),                ),                Tab(                  child: Container(                    decoration: BoxDecoration(                        borderRadius: BorderRadius.circular(50),                        border: Border.all(color: Colors.redAccent, width: 1)),                    child: Align(                      alignment: Alignment.center,                      child: Text("GAMES"),                    ),                  ),                ),              ]),        ),        body: TabBarView(children: [          Icon(Icons.apps),          Icon(Icons.movie),          Icon(Icons.games),        ]),      ))

Example 2: flutter tab bar bottom bar

int _selectedIndex = 0;
static const TextStyle optionStyle = TextStyle(fontSize: 30, fontWeight: FontWeight.bold);
static const List<Widget> _widgetOptions = <Widget>[
  Text(
    'Index 0: Home',
    style: optionStyle,
  ),
  Text(
     'Index 1: Business',
     style: optionStyle,
  ),
  Text(
     'Index 2: School',
     style: optionStyle,
  ),
];

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

@override
Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(
      title: const Text('BottomNavigationBar Sample'),
    ),
    body: Center(
      child: _widgetOptions.elementAt(_selectedIndex),
    ),
    bottomNavigationBar: BottomNavigationBar(
      items: const <BottomNavigationBarItem>[
        BottomNavigationBarItem(
          icon: Icon(Icons.home),
          label: 'Home',
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.business),
          label: 'Business',
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.school),
          label: 'School',
        ),
      ],
      currentIndex: _selectedIndex,
      selectedItemColor: Colors.amber[800],
      onTap: _onItemTapped,
    ),
  );
}

Example 3: flutter tab bar bottom bar

int _selectedIndex = 0;
static const TextStyle optionStyle = TextStyle(fontSize: 30, fontWeight: FontWeight.bold);
static const List<Widget> _widgetOptions = <Widget>[
  Text(
    'Index 0: Home',
    style: optionStyle,
  ),
  Text(
    'Index 1: Business',
    style: optionStyle,
  ),
  Text(
    'Index 2: School',
    style: optionStyle,
  ),
  Text(
    'Index 3: Settings',
    style: optionStyle,
  ),
];

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

@override
Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(
      title: const Text('BottomNavigationBar Sample'),
    ),
    body: Center(
      child: _widgetOptions.elementAt(_selectedIndex),
    ),
    bottomNavigationBar: BottomNavigationBar(
      items: const <BottomNavigationBarItem>[
        BottomNavigationBarItem(
          icon: Icon(Icons.home),
          label: 'Home',
          backgroundColor: Colors.red,
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.business),
          label: 'Business',
          backgroundColor: Colors.green,
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.school),
          label: 'School',
          backgroundColor: Colors.purple,
        ),
        BottomNavigationBarItem(
          icon: Icon(Icons.settings),
          label: 'Settings',
          backgroundColor: Colors.pink,
        ),
      ],
      currentIndex: _selectedIndex,
      selectedItemColor: Colors.amber[800],
      onTap: _onItemTapped,
    ),
  );
}

Example 4: tab design in flutter

DefaultTabController(        length: 3,        child: Scaffold(          appBar: AppBar(            backgroundColor: Colors.redAccent,            elevation: 0,            bottom: TabBar(                labelColor: Colors.redAccent,                unselectedLabelColor: Colors.white,                indicatorSize: TabBarIndicatorSize.label,                indicator: BoxDecoration(                    borderRadius: BorderRadius.only(                        topLeft: Radius.circular(10),                        topRight: Radius.circular(10)),                    color: Colors.white),                tabs: [                  Tab(                    child: Align(                      alignment: Alignment.center,                      child: Text("APPS"),                    ),                  ),                  Tab(                    child: Align(                      alignment: Alignment.center,                      child: Text("MOVIES"),                    ),                  ),                  Tab(                    child: Align(                      alignment: Alignment.center,                      child: Text("GAMES"),                    ),                  ),                ]            ),          ),          body: TabBarView(children: [            Icon(Icons.apps),            Icon(Icons.movie),            Icon(Icons.games),          ]),        )     )