how to reduce height of Tab Bar in flutter - flutter

I am using Scaffold to show my bottom tab navigator, but it shows too high, is there a way to reduce size of height in my Tab Bar. here is the code
Scaffold(
bottomNavigationBar: Material(
child: new TabBar(
tabs: <Widget>[
Tab(icon: Icon(Icons.home),text: 'Home'),
Tab(icon: Icon(Icons.settings),text: 'Settings')
],
labelColor: Colors.blue,
unselectedLabelColor: Colors.grey,
),
),
body: TabBarView(
children: [
MainScreen(),
FirstPage(),
],
),
)


You can wrap the child: new TabBar() in a container. And also change height of icon and text.
import 'package:flutter/material.dart';
class MyButtomTabBar extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: DefaultTabController(
length: 2,
child: Scaffold(
bottomNavigationBar: Material(
child: Container(
height: 40,
child: new TabBar(
tabs: <Widget>[
Tab(
icon: Icon(
Icons.home,
size: 15,
),
child: Text(
'Home',
style: TextStyle(fontSize: 10),
),
),
Tab(
icon: Icon(
Icons.settings,
size: 15,
),
child: Text(
'Settings',
style: TextStyle(fontSize: 10),
),
),
],
labelColor: Colors.blue,
unselectedLabelColor: Colors.grey,
),
),
),
),
),
);
}
}

Related

Go to specific section when button clicked in flutter

I am trying to navigate the section on the same page when the button is clicked but I can not do it using PageView and Scroll, Does anyone know how to do it?
This is the navigation bar on the top of the page and I want it to go to specific section on the same page when the button is clicked.
this is my code:
Row(
children: [
NavItem(
title: 'Home',
onPreesed: () {},
color: KprimaryColor,
fontWeight: FontWeight.w900,
),
NavItem(
title: 'About',
onPreesed: () {},
color: Colors.black,
fontWeight: FontWeight.normal,
),
NavItem(
title: 'Projects',
onPreesed: () {},
color: Colors.black,
fontWeight: FontWeight.normal,
),
NavItem(
title: 'Contact',
onPreesed: () {},
color: Colors.black,
fontWeight: FontWeight.normal,
),

Please, try this!
class MyAppTabView extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: DefaultTabController(
length: 4,
child: Scaffold(
appBar: AppBar(
backgroundColor: Colors.white,
title: Text('Flutter Tabs', style: TextStyle(color: Colors.black)),
bottom: const PreferredSize(
preferredSize: Size.fromHeight(40),
child: Align(
alignment: Alignment.centerRight,
child: TabBar(
isScrollable: true,
unselectedLabelStyle: TextStyle(fontWeight: FontWeight.normal),
unselectedLabelColor: Colors.black,
indicatorSize: TabBarIndicatorSize.label,
indicatorColor: Colors.transparent,
labelColor: Colors.red,
labelStyle: TextStyle(fontWeight: FontWeight.bold),
tabs: [
Tab(
child: Padding(
padding: EdgeInsets.symmetric(horizontal: 20),
child: Center(
child: Text("Home"),
),
),
),
Tab(
child: Padding(
padding: EdgeInsets.symmetric(horizontal: 20),
child: Center(
child: Text("About"),
),
),
),
Tab(
child: Padding(
padding: EdgeInsets.symmetric(horizontal: 20),
child: Center(
child: Text("Projects"),
),
),
),
Tab(
child: Padding(
padding: EdgeInsets.symmetric(horizontal: 20),
child: Center(
child: Text("Contact"),
),
),
),
]),
),
),
),
body: TabBarView(
children: [
Center(child: Text("Home")),
Center(child: Text("About")),
Center(child: Text("Projects")),
Center(child: Text("Contact")),
],
),
),
),
);
}
}
Enjoy Coding!!

How to change tab bar highlighted color

Note:
Solution from stackoverflow about this question not solved my issue
My full code
import 'package:flutter/material.dart';
class BookingHistory extends StatefulWidget {
BookingHistory({Key key}) : super(key: key);
#override
_BookingHistoryState createState() => _BookingHistoryState();
}
class _BookingHistoryState extends State<BookingHistory> {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: DefaultTabController(
length: 3,
child: Scaffold(
// backgroundColor: Colors.white,
appBar: AppBar(
flexibleSpace: Container(
color: Colors.green,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
TabBar(indicatorColor: Colors.blue,
labelColor: Colors.red,
unselectedLabelColor: Colors.green,
tabs: [
Tab(
child: Text(
"Completed",
style: TextStyle(color: Colors.white),
),
),
Tab(
child: Text(
"Requested",
style: TextStyle(color: Colors.white),
),
),
Tab(
child: Text(
"Accepted",
style: TextStyle(color: Colors.white),
),
)
])
],
),
),
),
body: TabBarView(children: [
Container(
child: Center(
child: Text("i am tab 1"),
),
),
Container(
child: Center(
child: Text("i am tab 2"),
),
),
Container(
child: Center(
child: Text("i am tab 3"),
),
)
]),
)),
);
}
}
Answer
To make effecting indicatorColor,labelColor or unselectedLabelColor we need wrap Widget with Material Widget(Solution suggested by Ravinder Kumar) or if we need only to change indicatorColor color then use indicatorColor: Colors.blueAccent color with ending with name Accent (Solution suggested by Amazing Aidan)

Bizarrely, changing the code to
indicatorColor: Colors.blueAccent
works but not Colors.blue

Wrap your TabBar inside Material widget,
Material(
color: Colors.green,
child:
TabBar(
indicatorColor: Colors.red,
labelColor: Colors.red,
unselectedLabelColor: Colors.green,
.....
Output:
Complete Code
class BookingHistory extends StatefulWidget {
BookingHistory({Key key}) : super(key: key);
#override
_BookingHistoryState createState() => _BookingHistoryState();
}
class _BookingHistoryState extends State<BookingHistory> {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: DefaultTabController(
length: 3,
child: Scaffold(
// backgroundColor: Colors.white,
appBar: AppBar(
flexibleSpace: Container(
color: Colors.green,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
Material(
color: Colors.green,
child:
TabBar(
indicatorColor: Colors.red,
labelColor: Colors.red,
unselectedLabelColor: Colors.green,
tabs: [
Tab(
child: Text(
"Completed",
style: TextStyle(color: Colors.white),
),
),
Tab(
child: Text(
"Requested",
style: TextStyle(color: Colors.white),
),
),
Tab(
child: Text(
"Accepted",
style: TextStyle(color: Colors.white),
),
)
]))
],
),
),
),
body: TabBarView(children: [
Container(
child: Center(
child: Text("i am tab 1"),
),
),
Container(
child: Center(
child: Text("i am tab 2"),
),
),
Container(
child: Center(
child: Text("i am tab 3"),
),
)
]),
)),
);
}
}
UPDATE: strangely any colors other than seems to work, for example use indicatorColor: Colors.black,

The Container in the AppBar is unncessary, instead directly set backgroundColor: Colors.green in AppBar.
And in the TabBar set indicatorColor, labelColor, unselectedLabelColor properly.
In each Tab you don't need to specify TextStyle. It will override labelColor and unselectedLabelColor from the TabBar.
AppBar(
backgroundColor: Colors.green,
flexibleSpace: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
TabBar(
indicatorColor: Colors.white,
labelColor: Colors.white,
unselectedLabelColor: Colors.white70,
tabs: [
Tab(child: Text("Completed")),
Tab(child: Text("Requested")),
Tab(child: Text("Accepted"))
])
],
),
)

How to implement fragment transaction in Flutter?

I'm having a Tab Layout at top of the screen and Bottom Navigation view at bottom of the screen.
I need to have a container in the middle and swap the views which is similar to fragment transactions in Android.
How to acheive this in Flutter ?
home: DefaultTabController(
length: prefList.length,
child: Scaffold(
appBar: AppBar(
backgroundColor: const Color(0xff00234a),
bottom: TabBar(
tabs: tabList,
isScrollable: true,
indicatorColor: const Color(0xffffffff),
),
title: Text('Test Demo'),
centerTitle: true,
),
body: Container(
child: TabBarView(
children: tabList,
controller: controller,
),
),
// Set the bottom navigation bar
bottomNavigationBar: Material(
// set the color of the bottom navigation bar
color: const Color(0xff00234a),
// set the tab bar as the child of bottom navigation bar
child: TabBar(
tabs: <Tab>[
Tab(
icon: Icon(Icons.favorite),
),
Tab(
icon: Icon(Icons.adb),
),
Tab(
icon: Icon(Icons.airplay),
),
Tab(
icon: Icon(Icons.gamepad),
),
Tab(
icon: Icon(Icons.videogame_asset),
),
],
// setup the controller
controller: controller,
),
),
),
),
);
}
I need to replace the TabView widget with something like Container layout in Android which is used to replace different fragments !

from flutter documentation you can achieve a bottom nav using this
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),
title: Text('Home'),
),
BottomNavigationBarItem(
icon: Icon(Icons.business),
title: Text('Business'),
),
BottomNavigationBarItem(
icon: Icon(Icons.school),
title: Text('School'),
),
],
currentIndex: _selectedIndex,
selectedItemColor: Colors.amber[800],
onTap: _onItemTapped,
),
);
}
for tabbed screen
//lifted from a project im doing
#override
Widget build(BuildContext context) {
return DefaultTabController(
length: 4,
child: Scaffold(
appBar: AppBar(centerTitle: true,
title: Text("tabs", style: TextStyle(fontWeight: FontWeight.bold, color: Colors.white)),
bottom: TabBar(
indicatorColor: Colors.white,
tabs: <Widget>[
Tab(
icon: Image.asset(
"assets/icons/tools.png",
height: 38,
),
child: Text("s1",style: TextStyle(fontSize: 10),),
),
Tab(
icon: Image.asset(
"assets/icons/il.png",
height: 38,
),
child: Text("s2",style: TextStyle(fontSize: 10)),
),
Tab(
icon: Icon(Icons.lock),
child: Text("s3"),
),
Tab(
icon: Icon(Icons.lock),
child: Text("s4"),
),
],
),
),
body: TabBarView(children: <Widget>[
Screen1(),
Screen2(),
Screen3(),
Screen4()
],),
),
);

Horizontally scrollable tabs focus on center with snap in flutter

Here I want to ask or can I make a tutorial like tabs, focusing center but the left and right tabs are 30% transparent like this, thank you!

Same can be achieved using - unselectedLabelColor: & indicatorColor: of TabBar widget.
Example Code:
#override
Widget build(BuildContext context) {
return DefaultTabController(
length: 6,
child: Scaffold(
appBar: AppBar(
centerTitle: true,
leading: Icon(Icons.person_outline),
title: Text('DASHBOARD',style: TextStyle(fontSize: 16.0),),
bottom: PreferredSize(
child: TabBar(
isScrollable: true,
unselectedLabelColor: Colors.white.withOpacity(0.3),
indicatorColor: Colors.white,
tabs: [
Tab(
child: Text('Tab 1'),
),
Tab(
child: Text('Investment'),
),
Tab(
child: Text('Your Earning'),
),
Tab(
child: Text('Current Balance'),
),
Tab(
child: Text('Tab 5'),
),
Tab(
child: Text('Tab 6'),
)
]),
preferredSize: Size.fromHeight(30.0)),
actions: <Widget>[
Padding(
padding: const EdgeInsets.only(right: 16.0),
child: Icon(Icons.add_alert),
),
],
),
body: TabBarView(
children: <Widget>[
Container(
child: Center(
child: Text('Tab 1'),
),
),
Container(
child: Center(
child: Text('Tab 2'),
),
),
Container(
child: Center(
child: Text('Tab 3'),
),
),
Container(
child: Center(
child: Text('Tab 4'),
),
),
Container(
child: Center(
child: Text('Tab 5'),
),
),
Container(
child: Center(
child: Text('Tab 6'),
),
),
],
)),
);
}
Output:

add isScrollable: true, inside TabBar
like
TabBar(
isScrollable: true,
.
.
.
)

Screenshot:
Code:
TabBar(
isScrollable: true, // Required
unselectedLabelColor: Colors.white30, // Other tabs color
labelPadding: EdgeInsets.symmetric(horizontal: 30), // Space between tabs
indicator: UnderlineTabIndicator(
borderSide: BorderSide(color: Colors.white, width: 2), // Indicator height
insets: EdgeInsets.symmetric(horizontal: 48), // Indicator width
),
tabs: [
Tab(text: 'Total Investment'),
Tab(text: 'Your Earnings'),
Tab(text: 'Current Balance'),
],
)

Placing isScrollable: true, in the TabBar worked for me.
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
#override
Widget build(BuildContext context) {
final _kTabPages = <Widget>[
Center(child: Icon(Icons.cloud, size: 64.0, color: Colors.teal)),
Center(child: Icon(Icons.alarm, size: 64.0, color: Colors.cyan)),
Center(child: Icon(Icons.forum, size: 64.0, color: Colors.blue)),
Center(child: Icon(Icons.forum, size: 64.0, color: Colors.blue)),
Center(child: Icon(Icons.forum, size: 64.0, color: Colors.blue)),
Center(child: Icon(Icons.forum, size: 64.0, color: Colors.blue)),
Center(child: Icon(Icons.forum, size: 64.0, color: Colors.blue)),
Center(child: Icon(Icons.forum, size: 64.0, color: Colors.blue)),
];
final _kTabs = <Tab>[
Tab(text: 'NK'),
Tab(text:'ActiveTools'),
Tab(text:'Coxmate'),
Tab(text:'Concept2'),
Tab(text:'Croker'),
Tab(text:'Hudson'),
Tab(text:'Swift'),
Tab(text:'Rowshop'),
];
return DefaultTabController(
length: _kTabs.length,
child: Scaffold(
appBar: AppBar(
leading:Image.asset("assets/Macarbi Logo.jpg"),//TODO image or icon here
title: Text(widget.title),
actions: <Widget>[
IconButton(
icon: Icon(Icons.search),
onPressed: () {},//TODO do something
),
IconButton(
icon: Icon(Icons.account_circle),
onPressed: () {},//TODO do something
),
],
bottom: TabBar(
isScrollable: true,
tabs: _kTabs,
),
),
body: TabBarView(
children: _kTabPages,
),
),
);
}

TabBar on bottom of app with Column

I am trying to put the TabBar on the bottom of the app.
It worked so far, yet I can't get the pages to work (TabBarView). It just looks black and unresponsive. The TabBar is unresponsive too. Have I taken the wrong approach?
Currently, it looks like that:
And the code looks like this:
import 'package:flutter/material.dart';
void main() => runApp(Bookkeeper());
class Bookkeeper extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: DefaultTabController(
length: 4,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
verticalDirection: VerticalDirection.up,
mainAxisSize: MainAxisSize.min,
children: [
AppBar(
backgroundColor: Color(0xFF3F5AA6),
title: Container(
padding: EdgeInsets.only(top: 8.0),
child: menu(),
),
),
TabBarView(
children: [
Icon(Icons.directions_car),
Icon(Icons.directions_transit),
Icon(Icons.directions_bike),
Icon(Icons.directions_bike),
],
),
],
),
),
);
}
Widget menu() {
return TabBar(
tabs: [
Tab(
child: Container(
height: 45.0,
child: Column(
children:
[
Icon(Icons.euro_symbol),
Text(
"Transactions",
style: new TextStyle(
height: 1.5,
fontSize: 9.8,
color: Colors.white,
),
),
],
),
),
),
Tab(
child: Container(
height: 45.0,
child: Column(
children:
[
Icon(Icons.assignment),
Text(
"Bills",
style: new TextStyle(
height: 1.5,
fontSize: 9.5,
color: Colors.white,
),
),
],
),
),
),
Tab(
child: Container(
height: 45.0,
child: Column(
children:
[
Icon(Icons.account_balance_wallet),
Text(
"Balance",
style: new TextStyle(
height: 1.5,
fontSize: 9.5,
color: Colors.white,
),
),
],
),
),
),
Tab(
child: Container(
height: 45.0,
child: Column(
children:
[
Icon(Icons.settings),
Text(
"Options",
style: new TextStyle(
height: 1.5,
fontSize: 9.5,
color: Colors.white,
),
),
],
),
),
),
],
);
}
}

Use bottomNavigationBar to position the Tabs at the bottom of the screen
class Bookkeeper extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: DefaultTabController(
length: 4,
child: Scaffold(
appBar: AppBar(
backgroundColor: Color(0xFF3F5AA6),
title: Text("Title text"),
),
bottomNavigationBar: menu(),
body: TabBarView(
children: [
Container(child: Icon(Icons.directions_car)),
Container(child: Icon(Icons.directions_transit)),
Container(child: Icon(Icons.directions_bike)),
Container(child: Icon(Icons.directions_bike)),
],
),
),
),
);
}
Widget menu() {
return Container(
color: Color(0xFF3F5AA6),
child: TabBar(
labelColor: Colors.white,
unselectedLabelColor: Colors.white70,
indicatorSize: TabBarIndicatorSize.tab,
indicatorPadding: EdgeInsets.all(5.0),
indicatorColor: Colors.blue,
tabs: [
Tab(
text: "Transactions",
icon: Icon(Icons.euro_symbol),
),
Tab(
text: "Bills",
icon: Icon(Icons.assignment),
),
Tab(
text: "Balance",
icon: Icon(Icons.account_balance_wallet),
),
Tab(
text: "Options",
icon: Icon(Icons.settings),
),
],
),
);
}
}