Currently I've got a problem with the dark mode for iOS in Flutter. I'm using a CupertinoApp with a CupertinoTheme.
With CupertinoDynamicColor.withBrightness() it's possible to define colors for dark and light theme. This is working for example for the navigation bar (barBackgroundColor), but not for the textTheme.
Someone already ask a similar question in the flutter repository but I don't know how to do this with a theme. Maybe you can help me there.
Example code:
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return CupertinoApp(
title: 'Flutter Demo',
theme: CupertinoThemeData(
barBackgroundColor: const CupertinoDynamicColor.withBrightness(
color: Colors.blue,
darkColor: Colors.red,
),
textTheme: CupertinoTextThemeData(
textStyle: TextStyle(
color: const CupertinoDynamicColor.withBrightness(
color: Colors.blue,
darkColor: Colors.red,
),
),
),
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return CupertinoPageScaffold(
navigationBar: CupertinoNavigationBar(middle: Text('Test')),
child: Text('Test Text'),
);
}
}
Related
import 'package:flutter/material.dart';
void main() {
runApp(RecipeApp());
}
class RecipeApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
final ThemeData theme = ThemeData();
return MaterialApp(
title: 'Recipe Calculator',
theme: theme.copyWith(
colorScheme: theme.colorScheme.copyWith(
primary: Colors.grey,
secondary: Colors.black,
),
),
home: const MyHomePage(title: 'Recipe Calculator'),
);
}
}
This is the current code and above is the current output as per the code, the color remains blue and white instead of grey and black
running on my emulator using your code it works, try restarting your app completely.
import 'package:flutter/material.dart';
void main() {
runApp(RecipeApp());
}
class RecipeApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
final ThemeData theme = ThemeData();
return MaterialApp(
title: 'Recipe Calculator',
theme: theme.copyWith(
colorScheme: theme.colorScheme.copyWith(
primary: Colors.grey,
secondary: Colors.black,
),
),
home: const MyHomePage(title: 'Recipe Calculator'),
);
}
}
class MyHomePage extends StatelessWidget {
final title;
const MyHomePage({this.title});
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(title),
),
);
}
}
Try below code hope its helpful to you ,I think you can used Scaffold Widget refer AppBar class here and refer Scaffold class here
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.grey,//change color on your need
title: Text(
'BottomNavigationBar Sample',
),
),
body:Container(),//or your widget
);
Your result screen->
By using Customscrollview and Slivers widgets everything shows well on the screen but when I try to scroll up and down there is no silver effect or any animation, the screen does not even scroll up and down
I am using Flutter beta version with Android emulator 19~
link https://api.flutter.dev/flutter/widgets/CustomScrollView-class.html
these are the two .dart files I am using right now:
main.dart
import 'package:flutter/material.dart';
import 'package:p1/home.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter facebook UI',
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: HomeScreen(),
);
}
}
home.dart
import 'package:flutter/material.dart';
class HomeScreen extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: CustomScrollView(
slivers: [
SliverAppBar(
brightness: Brightness.light,
backgroundColor: Colors.white,
title: Text(
'welcome',
style: const TextStyle(
color: Colors.grey,
fontSize: 28.0,
fontWeight: FontWeight.bold,
letterSpacing: -1.2,
),
),
),
],
),
);
}
}
Everything shows well on the screen but when I try to scroll up and down there is no silver effect or any animation, the screen does not even scroll up and down, any help?
I am new in flutter and now i am stuck to change FAB animation.Actually i am trying to before i press FAB that time it hadd add Icon and after press FAB it change icon close insted of add icon.
i provide one animation gif file link to more understand if any one know the solution please suggest me to solve this problem.
Here is the link https://miro.medium.com/max/468/1*qGa6VU4grjqEwAOScRm9BA.gif
In this link provided animation is showing that before press it shows the menu option icon and after press it show close icon but i want add option instead of menu option.
like add_close not a menu_close animationIcon.
I hope you understand my problem and suggest me
I think this code fulfill your requirements.
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Flutter FAB Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
#override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.white,
appBar: AppBar(
title: Text("FAB"),
),
floatingActionButton: AnimatedIconButton(
size: 30,
onPressed: () {
},
duration: Duration(milliseconds: 200),
endIcon: Icon(
Icons.close,
color: Colors.white,
),
startIcon: Icon(
Icons.add,
color: Colors.white,
),
startBackgroundColor: Colors.blue,
endBackgroundColor: Colors.blue,
),
);
}
}
this is the namespace which i used:
import 'package:flutter/material.dart';
import 'package:animated_icon_button/animated_icon_button.dart';
This code will work for all your requirements such as animation,multiple fab buttons with on pressed and also support images as a fab icon.
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Flutter FAB Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: UniWidget(),
);
}
}
class UniWidget extends StatefulWidget {
#override
_UniWidgetState createState() => _UniWidgetState();
}
class _UniWidgetState extends State<UniWidget> {
#override
Widget build(BuildContext context) {
var childButtons = List<UnicornButton>();
childButtons.add(UnicornButton(
hasLabel: false,
currentButton: FloatingActionButton(
backgroundColor: Colors.blue,
mini: false,
child: Padding(
padding: const EdgeInsets.all(15),
child: Image.asset('assets/images/arrow.png'),
),
onPressed: () {
print('scanbar');
},
)));
childButtons.add(UnicornButton(
hasLabel: false,
currentButton: FloatingActionButton(
backgroundColor: Colors.blue,
mini: false,
child: Padding(
padding: const EdgeInsets.all(15),
child: Image.asset('assets/images/contact.png'),
),
onPressed: () {
print('Contact');
},
)));
return Scaffold(
floatingActionButton: UnicornDialer(
parentButtonBackground: Colors.blue,
orientation: UnicornOrientation.VERTICAL,
childPadding: 10.0,
parentButton: Icon(Icons.add),
childButtons: childButtons),
appBar: AppBar(
title: Text("Fab demo"),
),
body: Center());
}
}
here is the namespaces
import 'package:flutter/material.dart';
import 'package:unicorndial/unicorndial.dart';
I hope it will fulfill your all type of requirements and work well in your project.
I'm building a news app using flutter, the app has 2 theme modes already dark and light debends on phone settings and works really great, but I need on some screens on my app to be dark whatever such as videos section or video page ...etc
I googled this and all the results about the normal theming which I did already.
I don't think there's any code I can put here to help, but if there please let me know!
You can override the current theme at any time simply by placing the desired widget in a Theme class.
I don't know if you are using Scaffold or not, but let's say you are then all you would need to do is:
// declare theme data if you don't have it already
final ThemeData specialThemeData = ThemeData(
brightness: Brightness.dark,
primaryColor: Colors.yellow[700],
// and so on...
);
#override
Widget build(BuildContext context) {
// this the point of interest, return a Theme with desired Theme Data
return Theme(
data: specialThemeData,
child: Scaffold(
//...
It doesn't have to be Scaffold, it will work on any widegt.
Here is a fully functional example you can try out yourself:
import 'package:flutter/material.dart';
final ThemeData specialThemeData = ThemeData(
brightness: Brightness.dark,
primaryColor: Colors.yellow[700],
accentColor: Colors.orange[500],
textTheme: TextTheme(
headline1: TextStyle(fontSize: 48.0, fontWeight: FontWeight.bold),
headline6: TextStyle(fontSize: 24.0, fontStyle: FontStyle.italic),
bodyText2: TextStyle(fontSize: 18.0),
),
);
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Home Page default theme'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
void _goToSpecialPage() {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => MySpecialPage()
)
);
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text('Your homepage, using default theme.',),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _goToSpecialPage,
tooltip: 'Go to special page',
child: Icon(Icons.navigate_next),
),
);
}
}
class MySpecialPage extends StatefulWidget {
MySpecialPage({Key key}) : super(key: key);
#override
_MySpecialPageState createState() => _MySpecialPageState();
}
class _MySpecialPageState extends State<MySpecialPage> {
void _backToHomePage(){
Navigator.pop(context);
}
#override
Widget build(BuildContext context) {
// this the point of interest, return a Theme with desired Theme Data
return Theme(
data: specialThemeData,
child: Scaffold(
appBar: AppBar(
title: Text('Special theme page'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text('Your special page that uses a different theme.',),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _backToHomePage,
tooltip: 'Go back to home page',
child: Icon(Icons.navigate_before),
),
),
);
}
}
I'm trying to create a custom theme inside a flutter project.
I've created a separate file (mycolors.dart) where i defined some colors (const myPrimaryColor = const Color(0xFFFF3900); etc etc)
Then, in main.dart i'm referring to these colors and a custom font but inside the Widget build...
How can I isolate the theme data (colors and font/text styles), let's say "separately", and to refer to it inside the class?
Can I also define 2 different themes and use them later in the project?
Many thanks.
import 'package:flutter/material.dart';
import 'package:my_repository/mycolors.dart';
import 'package:flutter_statusbarcolor/flutter_statusbarcolor.dart';
void main() {
runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
FlutterStatusbarcolor.setStatusBarColor(myPrimaryColor);
return MaterialApp(
theme: ThemeData(
fontFamily: 'Raleway',
primaryColor: myPrimaryColor,
accentColor: myAccentColor,
scaffoldBackgroundColor: myBackgroundColor,
cardColor: mySurfaceColor,
textSelectionColor: myPrimaryColor,
errorColor: myErrorColor,
),
home: Scaffold( ....
You can define your themes in a class and then call ThemeName().theme.
here is how I have a theme file in my app:
class MuskTheme {
...
ThemeData get theme => ThemeData(
brightness: Brightness.dark,
primarySwatch: musk,
accentColor: accentColor,
fontFamily: fontFamily,
backgroundColor: musk,
canvasColor:canvasColor,
textTheme: _textTheme,
iconTheme: _iconTheme,
cardColor: Color(0xff313A49),
appBarTheme: AppBarTheme(color: canvasColor,elevation: 0),
dialogBackgroundColor: canvasColor,
snackBarTheme: SnackBarThemeData(
backgroundColor: musk[800],
actionTextColor: accentColor,
),
);
...
}
for changing your theme during runtime you need to rebuild the MaterialApp widget by implementing a stateful widget that is higher than MaterialApp and can rebuild it upon request.
example implementation:
class ThemeChanger extends StatefulWidget {
final ThemeData initialTheme;
final MaterialApp Function(BuildContext context, ThemeData theme)
materialAppBuilder;
const ThemeChanger({Key key, this.initialTheme, this.materialAppBuilder})
: super(key: key);
#override
_ThemeChangerState createState() => _ThemeChangerState();
static void setTheme(BuildContext context, ThemeData theme) {
var state = context.ancestorStateOfType(TypeMatcher<_ThemeChangerState>())
as _ThemeChangerState;
state.setState(() {
state.theme = theme;
});
}
}
class _ThemeChangerState extends State<ThemeChanger> {
ThemeData theme;
#override
void initState() {
super.initState();
theme = widget.initialTheme;
}
#override
Widget build(BuildContext context) {
return widget.materialAppBuilder(context, theme);
}
}
then you'll need to build your MaterialApp with it:
class ThemeChangingApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return ThemeChanger(
initialTheme: ThemeData(
primarySwatch: Colors.blue,
),
materialAppBuilder: (context, theme) {
return MaterialApp(
theme: theme,
home: StartingPage(),
);
},
);
}
}
and in your app you can change the theme like this:
class StartingPage extends StatefulWidget {
#override
_StartingPageState createState() => _StartingPageState();
}
class _StartingPageState extends State<StartingPage> {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Container(
child: Center(
child: FlatButton(
child: Text('change theme to orange'),
onPressed: () {
ThemeChanger.setTheme(
context,
ThemeData(
primarySwatch: Colors.orange,
));
},
),
),
),
);
}
}
this package does a similar thing.
You can build a scaffold with a different theme just by warpping it with a Theme widget:
class StartingPage extends StatefulWidget {
#override
_StartingPageState createState() => _StartingPageState();
}
class _StartingPageState extends State<StartingPage> {
#override
Widget build(BuildContext context) {
return Theme(
data: ThemeData.dark(),
child: Scaffold(
appBar: AppBar(),
body: Container(
child: Center(
child: Text('test'),
),
),
),
);
}
}
final ThemeData customTheme = _buildcustomTheme();
ThemeData _buildcustomTheme() {
return customThemeFoundation;
}
ThemeData customThemeFoundation =ThemeData(
brightness: Brightness.dark,
primaryColor: Color.fromRGBO(40, 204, 86, 1),
accentColor: Colors.cyan[600],
fontFamily: 'Georgia',
textTheme: TextTheme(
headline1: TextStyle(fontSize: 72.0, fontWeight: FontWeight.bold),
headline6: TextStyle(fontSize: 36.0, fontStyle: FontStyle.italic),
bodyText2: TextStyle(fontSize: 14.0, fontFamily: 'Hind'),
),
and in main.dart just call it by
import 'theme.dart';
and just relpace theme:{.....} with theme: customTheme,