Related
I have added AppBar in my flutter application. My screen already have a background image, where i don't want to set appBar color or don't want set separate background image to appBar.
I want show same screen background image to appBar also.
I already tried by setting appBar color as transparent but it shows color like gray.
Example code:
appBar: new AppBar(
centerTitle: true,
// backgroundColor: Color(0xFF0077ED),
elevation: 0.0,
title: new Text(
"DASHBOARD",
style: const TextStyle(
color: const Color(0xffffffff),
fontWeight: FontWeight.w500,
fontFamily: "Roboto",
fontStyle: FontStyle.normal,
fontSize: 19.0
)),
)
This is supported by Scaffold now (in stable - v1.12.13+hotfix.5).
Set Scaffold extendBodyBehindAppBar to true,
Set AppBar elevation to 0 to get rid of shadow,
Set AppBar backgroundColor transparency as needed.
#override
Widget build(BuildContext context) {
return Scaffold(
extendBodyBehindAppBar: true,
backgroundColor: Colors.red,
appBar: AppBar(
// backgroundColor: Colors.transparent,
backgroundColor: Color(0x44000000),
elevation: 0,
title: Text("Title"),
),
body: Center(child: Text("Content")),
);
}
you can use Stack widget to do so. Follow below example.
import 'package:flutter/material.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new MaterialApp(
home: new Home(),
);
}
}
class Home extends StatefulWidget {
#override
_HomeState createState() => _HomeState();
}
class _HomeState extends State<Home> {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: <Widget>[
Scaffold(
backgroundColor: Colors.transparent,
appBar: new AppBar(
title: new Text(
"Hello World",
style: TextStyle(color: Colors.amber),
),
backgroundColor: Colors.transparent,
elevation: 0.0,
),
body: new Container(
color: Colors.red,
),
),
],
),
);
}
}
You can use Scaffold's property "extendBodyBehindAppBar: true"
Don't forget to wrap child with SafeArea
#Override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(
widget.title,
style: TextStyle(color: Colors.black),
),
backgroundColor: Colors.transparent,
elevation: 0.0,
),
extendBodyBehindAppBar: true,
body: Container(
width: double.infinity,
height: double.infinity,
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage('assets/background/home.png'),
fit: BoxFit.cover,
),
),
child: SafeArea(
child: Center(
child: Container(
width: 300,
height: 300,
decoration: BoxDecoration(
color: Colors.green,
),
child: Center(child: Text('Test')),
),
)),
),
);
}
None of these seem to work for me, mine went something like this:
return Scaffold(
extendBodyBehindAppBar: true,
appBar: AppBar(
backgroundColor: Colors.transparent,
iconTheme: IconThemeData(color: Colors.white),
elevation: 0.0,
),
body: Stack(
children: <Widget>[
Container(
decoration: BoxDecoration(
image: DecorationImage(
image: NetworkImage(
'https://images.unsplash.com/photo-1517030330234-94c4fb948ebc?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1275&q=80'),
fit: BoxFit.cover,
),
),
child: Padding(
padding: const EdgeInsets.fromLTRB(0, 100, 0, 0),
child:
// Column of widgets here...
),
),
],
),
);
Output:
A lot of answers but nobody explains why extendBodyBehindAppBar works?
It works because when we assigned extendBodyBehindAppBar as true, then the body of the widget takes the height of AppBar, and we see an image covering the AppBar area.
Simple Example:
Size size = MediaQuery.of(context).size;
return Scaffold(
extendBodyBehindAppBar: true,
body: Container(
// height: size.height * 0.3,
child: Image.asset(
'shopping_assets/images/Fruits/pineapple.png',
fit: BoxFit.cover,
height: size.height * 0.4,
width: size.width,
),
),
);
There could be many cases, for example, do you want to keep the AppBar or not, whether or not you want to make the status bar visible, for that, you can wrap Scaffold.body in SafeArea and if you want AppBar to not have any shadow (unlike the red I provided in example 2), you can set its color to Colors.transparent:
Full image (without AppBar)
Scaffold(
extendBodyBehindAppBar: true,
body: SizedBox.expand(
child: Image.network(
'https://wallpaperaccess.com/full/3770388.jpg',
fit: BoxFit.cover,
),
),
)
Full image (with AppBar)
Scaffold(
extendBodyBehindAppBar: true,
appBar: AppBar(
backgroundColor: Colors.transparent,
shadowColor: Colors.red,
title: Text('MyApp'),
),
body: SizedBox.expand(
child: Image.network(
'https://wallpaperaccess.com/full/3770388.jpg',
fit: BoxFit.cover,
),
),
)
that's what I did and it's working
This is supported by Scaffold now (in stable - v1.12.13+hotfix.5).
Set Scaffold extendBodyBehindAppBar to true,
Set AppBar elevation to 0 to get rid of shadow,
Set AppBar backgroundColor transparency as needed.
Best regards
Scaffold(extendBodyBehindAppBar: true);
In my case I did it as follows:
Additional create an app bar with a custom back button (in this case with a FloatingActionButton). You can still add widgets inside the Stack.
class Home extends StatefulWidget {
#override
_EditProfilePageState createState() => _EditProfilePageState();
}
class _HomeState extends State< Home > {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: <Widget>[
this._backgroundImage(), // --> Background Image
Positioned( // --> App Bar
child: AppBar(
backgroundColor: Colors.transparent,
elevation: 0.0,
leading: Padding( // --> Custom Back Button
padding: const EdgeInsets.all(8.0),
child: FloatingActionButton(
backgroundColor: Colors.white,
mini: true,
onPressed: this._onBackPressed,
child: Icon(Icons.arrow_back, color: Colors.black),
),
),
),
),
// ------ Other Widgets ------
],
),
);
}
Widget _backgroundImage() {
return Container(
height: 272.0,
width: MediaQuery.of(context).size.width,
child: FadeInImage(
fit: BoxFit.cover,
image: NetworkImage(
'https://images.unsplash.com/photo-1527555197883-98e27ca0c1ea?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&w=1000&q=80'),
placeholder: AssetImage('assetName'),
),
);
}
void _onBackPressed() {
Navigator.of(context).pop();
}
}
In the following link you can find more information Link
You can Try this This code work for me
#override
Widget build(BuildContext context) {
_buildContext = context;
sw = MediaQuery.of(context).size.width;
sh = MediaQuery.of(context).size.height;
return new Container(
child: new Stack(
children: <Widget>[
new Container(
child: Stack(
children: <Widget>[
Container(
padding: EdgeInsets.all(20.0),
decoration: BoxDecoration(image: backgroundImage),
),
],
),
),
new Scaffold(
backgroundColor: Colors.transparent,
appBar: new AppBar(
title: new Text(Strings.page_register),
backgroundColor: Colors.transparent,
elevation: 0.0,
centerTitle: true,
),
body: SingleChildScrollView(
padding: EdgeInsets.all(20.0),
physics: BouncingScrollPhysics(),
scrollDirection: Axis.vertical,
child: new Form(
key: _formKey,
autovalidate: _autoValidate,
child: FormUI(),
),
),
)
],
),
);
}
backgroundImage
DecorationImage backgroundImage = new DecorationImage(
image: new ExactAssetImage('assets/images/welcome_background.png'),
fit: BoxFit.cover,
);
use stack
set background image
Another Scaffold()
set background color transperant
set custom appbar
use column with singleChildScrollView or ListView
#override Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: <Widget>[
backgroundBGContainer(),
Scaffold(
backgroundColor: Colors.transparent,
appBar: appBarWidgetCustomTitle(context: context, titleParam: ""),
body: SingleChildScrollView(
child: Column(
children: <Widget>[
_spaceWdgt(),
Center(
child: Stack(
children: <Widget>[
new Image.asset(
"assets/images/user_icon.png",
width: 117,
height: 97,
),
],
),
),
Widget backgroundBGContainer() {
return Container(
decoration: new BoxDecoration(
image: new DecorationImage(
image: new AssetImage("assets/images/ground_bg_image.png"),
fit: BoxFit.cover,
),
color: MyColor().groundBackColor),
);
}
don't forget to set foregroundColor attribite to the desired color in order to make the navigation icon and the title visible
Note that the foregroundColor default value is white.
question 1:
how to add a notch to flutter bottom sheet around the floatingactionbutton, so that it looks like a bottomappbar (with shape of CircularNotchedRectangle()) but behave like bottomsheet (can drag to dismiss)
question 2:
how to make a bottomsheet non-dismissible yet still draggable. (similiar to android's bottomsheet)
question 3:
bottomsheet peek height, bottom sheet that dismissible, but also expandable (again, just like android bottomsheet)
is it possible to achieve what I've listed above? or i'm out of luck and have to use a 3rd party library? (if there's one?)
hope its help :)
Scaffold(
floatingActionButtonLocation: FloatingActionButtonLocation.startDocked, //specify the location of the FAB
floatingActionButton: FloatingActionButton(
backgroundColor: Colors.blue,
onPressed: () {
print('OK');
},
tooltip: "start FAB",
child: Container(
margin: EdgeInsets.all(15.0),
child: Icon(Icons.add),
),
elevation: 4.0,
),
bottomNavigationBar: BottomAppBar(
child: Container(
color: mycolor,
height: 35,
),
)
);
You can use this technique too
Scaffold(
backgroundColor: myBackgroundColor,
floatingActionButtonLocation: FloatingActionButtonLocation.startDocked, //specify the location of the FAB
floatingActionButton: CircleAvatar(
radius: 32,
backgroundColor: myBackgroundColor,
child: Padding(
padding: EdgeInsets.all(1),
child: FloatingActionButton(
backgroundColor: MyColor.textColor,
onPressed: () {
print('OK');
},
child: Container(
margin: EdgeInsets.all(15.0),
child: Icon(Icons.add),
),
elevation: 4.0,
),
),
),
bottomNavigationBar: BottomAppBar(
child: Container(
color: MyColor.textColor,
height: 35,
),
)
);
Below is my code which I expect to render a round-corner container with a transparent background.
return new Container(
//padding: const EdgeInsets.all(32.0),
height: 800.0,
//color: const Color(0xffDC1C17),
//color: const Color(0xffFFAB91),
decoration: new BoxDecoration(
color: Colors.green, //new Color.fromRGBO(255, 0, 0, 0.0),
borderRadius: new BorderRadius.only(
topLeft: const Radius.circular(40.0),
topRight: const Radius.circular(40.0))
),
child: new Container(
decoration: new BoxDecoration(
color: Colors.blue,
borderRadius: new BorderRadius.only(
topLeft: const Radius.circular(40.0),
topRight: const Radius.circular(40.0))
),
child: new Center(
child: new Text("Hi modal sheet"),
)
),
However this is what it renders, it renders a white container (expected transparent) with a round corner radius. Any help?
If you wrap your Container with rounded corners inside of a parent with the background color set to Colors.transparent I think that does what you're looking for. If you're using a Scaffold the default background color is white. Change that to Colors.transparent if that achieves what you want.
new Container(
height: 300.0,
color: Colors.transparent,
child: new Container(
decoration: new BoxDecoration(
color: Colors.green,
borderRadius: new BorderRadius.only(
topLeft: const Radius.circular(40.0),
topRight: const Radius.circular(40.0),
)
),
child: new Center(
child: new Text("Hi modal sheet"),
)
),
),
If you want to round corners with transparent background, the best approach is using ClipRRect.
return ClipRRect(
borderRadius: BorderRadius.circular(40.0),
child: Container(
height: 800.0,
width: double.infinity,
color: Colors.blue,
child: Center(
child: new Text("Hi modal sheet"),
),
),
);
As of May 1st 2019, use BottomSheetTheme.
MaterialApp(
theme: ThemeData(
// Draw all modals with a white background and top rounded corners
bottomSheetTheme: BottomSheetThemeData(
backgroundColor: Colors.white,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.vertical(top: Radius.circular(10))
)
)
),
Introduced recently, using a theme to control the sheets style should be the best route.
If you want to theme different bottom sheets differently, include a new Theme object in the appropriate subtree to override the bottom sheet theme just for that area.
If for some reason you'd still like to override the theme manually when launching a bottom sheet, showBottomSheet and showModalBottomSheet now have a backgroundColor parameter. Use it like this:
showModalBottomSheet(
backgroundColor: Colors.transparent,
context: context,
builder: (c) {return NavSheet();},
);
/// Create the bottom sheet UI
Widget bottomSheetBuilder(){
return Container(
color: Color(0xFF737373), // This line set the transparent background
child: Container(
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.only(
topLeft: Radius.circular(16.0),
topRight: Radius.circular( 16.0)
)
),
child: Center( child: Text("Hi everyone!"),)
),
);
}
Call this to show the BotoomSheet with corners:
/// Show the bottomSheet when called
Future _onMenuPressed() async {
showModalBottomSheet(
context: context,
builder: (widgetBuilder) => bottomSheetBuilder()
);
}
It's an old question. But for those who come across this question...
The white background behind the rounded corners is not actually the container. That is the canvas color of the app.
TO FIX: Change the canvas color of your app to Colors.transparent
Example:
return new MaterialApp(
title: 'My App',
theme: new ThemeData(
primarySwatch: Colors.green,
canvasColor: Colors.transparent, //----Change to this------------
accentColor: Colors.blue,
),
home: new HomeScreen(),
);
Scaffold(
appBar: AppBar(
title: Text('BMI CALCULATOR'),
),
body: Container(
height: 200,
width: 170,
margin: EdgeInsets.all(15),
decoration: BoxDecoration(
color: Color(
0xFF1D1E33,
),
borderRadius: BorderRadius.circular(5),
),
),
);
Use transparent background color for the modalbottomsheet and give separate color for box decoration
showModalBottomSheet(
backgroundColor: Colors.transparent,
context: context, builder: (context) {
return Container(
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.only(
topLeft:Radius.circular(40) ,
topRight: Radius.circular(40)
),
),
padding: EdgeInsets.symmetric(vertical: 20,horizontal: 60),
child: Settings_Form(),
);
});
showModalBottomSheet(
context: context,
builder: (context) => Container(
color: Color(0xff757575), //background color
child: new Container(
decoration: new BoxDecoration(
color: Colors.blue,
borderRadius: new BorderRadius.only(
topLeft: const Radius.circular(40.0),
topRight: const Radius.circular(40.0))
),
child: new Center(
child: new Text("Hi modal sheet"),
)
),
)
This is will make your container color the same as the background color. And there will be a child container of the same height-width with blue color.
This will make the corner with the same color as the background color.
Three related packages for covering this issue with many advanced options are:
sliding_up_panel
modal_bottom_sheet
sliding_panel
class MyApp2 extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
theme: ThemeData(
appBarTheme: AppBarTheme(
elevation: 0,
color: Colors.blueAccent,
)
),
title: 'Welcome to flutter ',
home: HomePage()
);
}
}
class HomePage extends StatefulWidget {
#override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
int number = 0;
void _increment(){
setState(() {
number ++;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.blueAccent,
appBar: AppBar(
title: Text('MyApp2'),
leading: Icon(Icons.menu),
// backgroundColor: Colors.blueAccent,
),
body: Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.only(
topLeft: Radius.circular(200.0),
topRight: Radius.circular(200)
),
color: Colors.white,
),
)
);
}
}
If both containers are siblings and the bottom container has rounded corners
and the top container is dynamic then you will have to use the stack widget
Stack(
children: [
/*your_widget_1*/,
/*your_widget_2*/,
],
);
I have not been able to locate any documentation for creating footer nav bars with Flutter/Dart. I know that "crossAxisAlignment: CrossAxisAlignment.end" can be used to pull content to the bottom of a column. However, I'm not sure how to render a site footer that sticks to the bottom of the screen. There are various solutions in flex and css grid, but not clear on what implementation would look like in this platform.
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
Widget siteLogo = new Container(
padding: const EdgeInsets.only(top: 100.0),
child: new Image.asset(
'images/logo.png',
width: 180.0,
height: 180.0,
),
);
Widget titleTextSection = new Container(
padding: const EdgeInsets.only(left: 80.0, right: 80.0, top: 30.0, bottom: 20.0),
child: new Text(
''' Welcome to The Site''',
textAlign: TextAlign.center,
style: new TextStyle(
fontSize: 35.0,
fontWeight: FontWeight.w500,
),
),
);
Widget subtitleTextSection = new Container(
padding: const EdgeInsets.only(left: 40.0, right: 40.0, bottom: 40.0),
child: new Text(
'''Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec imperdiet Donec imperdiet.''',
textAlign: TextAlign.center,
style: new TextStyle(
fontSize: 15.0,
fontWeight: FontWeight.w400
),
),
);
// footer
Column signInLink(String label) {
return new Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
new Container(
child: new Text(
label,
style: new TextStyle(
fontSize: 16.0,
fontWeight: FontWeight.w400,
color: const Color(0xFFf735e9)
),
),
),
],
);
}
Column existingAccountLink(String label) {
return new Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
new Container(
child: new Text(
label,
style: new TextStyle(
fontSize: 16.0,
fontWeight: FontWeight.w400,
color: const Color(0xFFeceff1)
),
),
),
],
);
}
Widget footer = new Container(
height: 50.0,
decoration: new BoxDecoration(color: Colors.black),
child: new Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
existingAccountLink('Already have an account?'),
signInLink('SIGN IN'),
],
),
);
return new MaterialApp(
title: 'Flutter Demo',
home: new Scaffold(
body: new Container(
decoration: new BoxDecoration(
image: new DecorationImage(
image: new AssetImage('images/backgroundimg.jpg'),
fit: BoxFit.cover,
),
),
child: new ListView(
children: [
siteLogo,
titleTextSection,
subtitleTextSection,
footer,
],
),
)
),
);
}
}
As you can see, I am currently using ListView to layout the widgets. The only thing I can think of right now is to put the whole ListView in a single column, crossAxisAlign to End so everything gets pulled down, and then style each widget relative to the footer. There must be a better way though?
Since you are using Scaffold, you can use bottomNavigationBar to have a 'sticky' bottom widget. (And potentially use BottomNavigationBar if you want to)
new Scaffold(
appBar: new AppBar(title: new Text("Title")),
body: new ListView.builder(
itemBuilder: (context, index) {
return new ListTile(
title: new Text("title $index"),
);
},
),
bottomNavigationBar: new Container(
height: 40.0,
color: Colors.red,
),
);
Alternatively your
The only thing I can think of right now is to put the whole ListView in a single column
is not a bad idea at all. That's how things works in flutter.
Although MainAxisAlignement.end is not the right way to do it.
You could achieve the same layout as with bottomNavigationBar without a Scaffold, using a Column this way :
new Column(
children: <Widget>[
new Expanded(
child: new ListView.builder(
itemBuilder: (context, index) {
return new ListTile(
title: new Text("title $index"),
);
},
),
),
new Container(
height: 40.0,
color: Colors.red,
),
],
),
The use of a listview is an excellent choice when you have a list of items that need a listview. Sometimes the other items in the layout might be fixed and do not need a listview. e.g using a column.
Example on how to achieve fixed bottom footer using stack.
#override
Widget build(BuildContext context) {
return new Material(
child: Scaffold(
body: Stack(
children : <Widget> [
Text("Top positioned text"),
Column(
children : <Widget> [
Text("Column:Top positioned text"),
Text("Column:Top positioned text")
]
),
Positioned(
bottom : 0,
child: Text("Bottom positioned text")
)
]
)
}
you can use Footer from flutter_layouts
sticky footer can be hard to implement. since you have to know the height of footer, it is not possible to perform this in build() function.
try out below flutter package.
https://github.com/softmarshmallow/flutter-layouts/tree/master/lib/src/footer
https://github.com/softmarshmallow/flutter-layouts/
by this, you can use footer with scaffold bottom nav. example
import 'package:flutter_layouts/flutter_layouts.dart';
class _FooterScreenState extends State<FooterScreen> {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("footer demo"),
),
body: buildBody(),
bottomNavigationBar: BottomNavigationBar(items: [
BottomNavigationBarItem(icon: Icon(Icons.add), title: Text("first")),
BottomNavigationBarItem(icon: Icon(Icons.remove), title: Text("second"))
]),
);
}
Widget buildBody() {
return Footer(
body: buildContent(),
footer: buildFooter(),
);
}
Widget buildContent() {
return ListView.builder(
itemBuilder: (c, i) {
return Card(
margin: EdgeInsets.all(16),
child: Container(
padding: EdgeInsets.all(24),
child: Text("contents"),
),
);
},
itemCount: 20,
);
}
Widget buildFooter() {
return Container(
padding: EdgeInsets.all(24),
decoration: BoxDecoration(color: Theme.of(context).primaryColor),
child: FlatButton(
onPressed: () {},
child: Text("Lean more", style: Theme.of(context).textTheme.button.copyWith(
color: Theme.of(context).colorScheme.onBackground
),),
),
);
}
}
I'm trying to make a simple AppBar widget with some icons in Flutter, but I keep getting this assertion:
The following assertion was thrown building IconButton(Icon(IconData(U+0E5D2)); disabled; tooltip:
I pretty much just mimiced the documentation, but here is my code:
import 'package:flutter/material.dart';
void main() {
runApp(new MaterialApp(
title: "Stateless Widget Example",
home: new AppBar(title: new Text("App Bar"))
));
}
class AppBar extends StatelessWidget {
AppBar({this.title});
final Widget title;
#override
Widget build(BuildContext context) {
return new Container(
height: 56.0,
padding: const EdgeInsets.symmetric(horizontal: 8.0),
decoration: new BoxDecoration(
color: Colors.cyan,
border: new Border(
bottom: new BorderSide(
width: 1.0,
color: Colors.black
)
)
),
child: new Row (
children: <Widget> [
new IconButton(
icon: new Icon(Icons.menu),
tooltip: 'Navigation menu',
onPressed: null, // null disables the button
),
new Expanded(child: title)
]
)
);
}
}
I feel like I'm missing an import or something. But I'm not completely sure. Perhaps my computer was just acting up, because Flutter run has been buggy for me. I'm new to Dart and Flutter, so perhaps I'm just not seeing an obvious error.
IconButton is a Material Widget, so you need to use it inside a Material parent, for example something like this:
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(title: new Text(widget.title), actions: <Widget>[
new IconButton(
icon: new Icon(Icons.favorite),
tooltip: 'Favorite',
onPressed: () {},
),
new IconButton(
icon: new Icon(Icons.more_vert),
tooltip: 'Navigation menu',
onPressed: () {},
),
]),
body: new Center(
child: new Text('This is the body of the page.'),
),
);
}
Check to ensure that your pubspec.yaml contains the following:
flutter:
uses-material-design: true
That will ensure that the Material Icons font is included with your application, so that you can use the icons in the Icons class.
addButton() {
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Padding(
padding: const EdgeInsets.symmetric(vertical: 10.0),
child: SizedBox(
height: 45,
width: 200,
child: ElevatedButton.icon(
onPressed: () async {},
style: ButtonStyle(
shape: MaterialStateProperty.all<RoundedRectangleBorder>(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(30.0),
)),
elevation: MaterialStateProperty.all(1),
backgroundColor: MaterialStateProperty.all(Colors.blue),
),
icon: Icon(Icons.add, size: 18),
label: Text("Add question"),
),
),
),
],
);
}
you lost meterial widget
IconButton needs Material
return new Material(
child: new Container(
height: 56.0,
padding: const EdgeInsets.symmetric(horizontal: 8.0),
decoration: new BoxDecoration(
color: Colors.cyan,
border: new Border(
bottom: new BorderSide(
width: 1.0,
color: Colors.black
)
)
),
child: new Row (
children: <Widget> [
new IconButton(
icon: new Icon(Icons.menu),
tooltip: 'Navigation menu',
onPressed: null, // null disables the button
),
new Expanded(child: title)
]
)
);