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?
Related
I'm using the webview plugin to show a graph in my app. The sample code works fine and it displays the website with the graph I want to show. I want it to be automatically zoomed in for me to be able to read it better, and also because I'm adding multiple graphs in one page. The website only has one component (the graph) and nothing else (no headers or anything else) so I figured I can't use javascript methods where I can program my app not to show specific parts of the webpage.
Here is my current code:
import 'package:flutter/material.dart';
import 'package:webview_flutter/platform_interface.dart';
import 'package:webview_flutter/webview_flutter.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
#override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
#override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Color(0xFFFCFCFC),
appBar: AppBar(
centerTitle: true,
title: const Text('test',
style: TextStyle(
fontSize: 28.0,
fontWeight: FontWeight.bold,
letterSpacing: 2.5,
),
),
),
body: Center(
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
/*Container(
height: 90,
width: 90,
color: Colors.red,
),*/
Container(
height: 150,
child: WebView(
initialUrl: 'https://thingspeak.com/channels/1864145/charts/1?bgcolor=%23ffffff&color=%23d62020&dynamic=true&results=60&title=Carbon+Dioxide+Concentrations&type=line',
javascriptMode: JavascriptMode.unrestricted,),
color: Colors.blue,
),
],
),
),
);
}
}
I was wondering if there's a method where I can automatically zoom the website. If not, are there other plugins that support this?
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->
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),
),
),
);
}
}
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'),
);
}
}