I'm trying to make a screen layout with a transparent AppBar that has to scroll content under it.
The problem is that when content is scrolled, the AppBar shows a shadow, shadowColor, but it is set to transparent color.
EDIT: I noticed that the cause of this is having useMaterial3 set to true in my App Theme.
I'm using Flutter 3.0.2.
This is my code:
Stack(
fit: StackFit.expand,
children: [
//AuthBackground(),
Container(color: Colors.brown,),
Theme(
data: AppStyles.mainDarkTheme.copyWith(
textTheme: AppStyles.mainDarkTheme.textTheme.apply(
bodyColor: Colors.blue,
displayColor: Colors.blue,
)
),
child: Scaffold(
backgroundColor: Colors.transparent,
extendBodyBehindAppBar: true,
appBar: AppBar(
backgroundColor: Colors.transparent,
shadowColor: Colors.transparent,
elevation: 0.0,
bottomOpacity: 0.0,
),
body: _content(),
),
),
],
)
Here you have a pic where you can notice the shadow on AppBar when content is scrolled:
Thanks in advance!
Finally I got it.
I answered myself on this post:
I had same problem.
In my case i had an AppBar with transparent background and a Scaffold
with extendBodyBehindAppBar set to true.
I tried with shadowColor and surfaceTintColor with Colors.transparent
value, but the shadow was still visible.
Then I noticed the scrolledUnderElevation property of AppBar. Setting
it to 0.0 was the solution.
Set elevation = 0 works for me
appBar: AppBar(
elevation: 0,
backgroundColor: Colors.transparent,
shadowColor: Colors.transparent,
This is because the default elevation property is set to appbar. so the simple solution is to set the elevation property. like below
elevation: 0,
it's done.
How I can have a custom color for my StatusBar without the AppBar?
To customize the StatusBar color I used this code:
appBar: AppBar(
backgroundColor: Colors.teal
)
If I remove appbar I can't customize the StatusBar. How I can do this?
How can I remove the AppBar but keeping the StatusBar?
Add this in your main.dart's main method file after the runApp method
SystemChrome.setSystemUIOverlayStyle(
SystemUiOverlayStyle(statusBarColor: <YOUR STATUS BAR COLOR>));
Like this:
void main(){
runApp(MyApp());
SystemChrome.setSystemUIOverlayStyle(
SystemUiOverlayStyle(statusBarColor: <YOUR STATUS BAR COLOR>));
}
If you are using SafeArea then you need to set it's top property to false.
You can also use this
#override
Widget build(BuildContext context) {
return Container(
color: Your Color Here,
child: SafeArea(
bottom: false,
child: Scaffold(
),
),
);
}
you can use the following code for change the status bar color first step you have to import this package given below
"import 'package:flutter/services.dart';
and then add this code in your main.dart file
void main(){SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(statusBarColor:Colors.blue,));}
Simply we can implemet using AppBar, in below code backgroundColor: Colors.green is applied to statusbar.
Scaffold(
appBar: AppBar(
systemOverlayStyle: SystemUiOverlayStyle.dark,
backgroundColor: Colors.green,
elevation: 0,
toolbarHeight: 0,
),
backgroundColor: Colors.white38,
body: Container(),
)
Prview:
How to make a translucent appbar with flutter?
I need to create an app bar but I do not know where to start.
exemple:
Image
Here's how to make a scaffold layout with a translucent app bar:
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
class TranslucentExample extends StatelessWidget {
#override
Widget build(BuildContext context) {
return AnnotatedRegion<SystemUiOverlayStyle>(
value: SystemUiOverlayStyle(
// Overrides the standard translucent status bar.
statusBarColor: Colors.transparent,
),
child: Scaffold(
appBar: AppBar(
backgroundColor: Colors.black12,
// Remove any elevation to avoid seeing a shadow underneath the translucent material of the app bar.
elevation: 0.0,
title: Text('Photo frame'),
action: <Widget>[
IconButton(
icon: Icon(Icons.settings),
tooltip: 'Settings',
onPressed: () => print('something'),
),
],
),
// You might have to change the fit of the image to make it 'full screen'.
body: Image.network('url.to/image'),
),
);
}
}
Unfortunately it isn't possible to fully recreate the screenshot you provided since it currently isn't possible to have a transparent or translucent navigation bar on Android with Flutter apps.
Only add extendBodyBehindAppBar: true,
like:
return Scaffold(
appBar: AppBar(
title: Text("Photo"),
backgroundColor: Colors.black12,
),
extendBodyBehindAppBar: true,
body: Container(),
);
I'm trying to change the color of the system status bar to black.
The configuration seems to be overridden by the AppBar class. I can achieve what I want by assigning the theme: to ThemeData.dark() when creating the Material App, and then specifying an appBar attribute. But I don't want an AppBar, and also, doing it this way changes all the font colors.
A possible solution is to inherit ThemeData.bright() into a new class, then add something that only changes the system status bar through
setSystemUIOverlayStyle
And then I would need to specify AppBar and make it invisible somehow?
Documentation
main.dart
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:english_words/english_words.dart';
import 'layout_widgets.dart' as layout_widgets;
class RandomWords extends StatefulWidget {
#override
createState() => new RandomWordsState();
}
class RandomWordsState extends State<RandomWords> {
final _suggestions = <WordPair>[];
final _saved = new Set<WordPair>();
final _biggerFont = const TextStyle(fontSize: 18.0);
void _pushSaved() {
Navigator.of(context).push(
new MaterialPageRoute(
builder: (context) {
final tiles = _saved.map((pair) {
return new ListTile(
title: new Text(pair.asPascalCase,style:_biggerFont)
);
}
);
final divided = ListTile.divideTiles(
context:context,
tiles: tiles,).toList();
return new Scaffold(
appBar: new AppBar(
title: new Text('Saved Suggestions'),
),
body: new ListView(children:divided),
);
}
)
);
}
Widget _buildSuggestions() {
return new ListView.builder(
padding: const EdgeInsets.all(16.0),
// The item builder callback is called once per suggested word pairing,
// and places each suggestion into a ListTile row.
// For even rows, the function adds a ListTile row for the word pairing.
// For odd rows, the function adds a Divider widget to visually
// separate the entries. Note that the divider may be difficult
// to see on smaller devices.
itemBuilder: (context, i) {
// Add a one-pixel-high divider widget before each row in theListView.
if (i.isOdd) return new Divider();
// The syntax "i ~/ 2" divides i by 2 and returns an integer result.
// For example: 1, 2, 3, 4, 5 becomes 0, 1, 1, 2, 2.
// This calculates the actual number of word pairings in the ListView,
// minus the divider widgets.
final index = i ~/ 2;
// If you've reached the end of the available word pairings...
if (index >= _suggestions.length) {
// ...then generate 10 more and add them to the suggestions list.
_suggestions.addAll(generateWordPairs().take(10));
}
return _buildRow(_suggestions[index]);
}
);
}
Widget _buildRow(WordPair pair) {
final alreadySaved = _saved.contains(pair);
return new ListTile(
title: new Text(
pair.asPascalCase,
style: _biggerFont,
),
trailing: new Icon(
alreadySaved ? Icons.favorite : Icons.favorite_border,
color: alreadySaved ? Colors.red : null,
),
onTap: () {
setState(() {
if (alreadySaved) {
_saved.remove(pair);
} else {
_saved.add(pair);
}
});
},
);
}
#override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('Startup Name Generator'),
actions: <Widget>[
new IconButton(icon:new Icon(Icons.list), onPressed: _pushSaved),
],
),
body: _buildSuggestions(),
);
}
}
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
Column buildButtonColumn(IconData icon, String label) {
Color color = Theme.of(context).primaryColor;
return new Column(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Icon(icon, color: color),
new Container(
margin: const EdgeInsets.only(top:8.0),
child: new Text(
label,
style: new TextStyle(
fontSize: 12.0,
fontWeight: FontWeight.w400,
color: color,
)
),
)
],
);
}
Widget titleSection = layout_widgets.titleSection;
Widget buttonSection = new Container(
child: new Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
buildButtonColumn(Icons.contact_mail, "CONTACT"),
buildButtonColumn(Icons.folder_special, "PORTFOLIO"),
buildButtonColumn(Icons.picture_as_pdf, "BROCHURE"),
buildButtonColumn(Icons.share, "SHARE"),
],
)
);
Widget textSection = new Container(
padding: const EdgeInsets.all(32.0),
child: new Text(
'''
The most awesome apps done here.
''',
softWrap: true,
),
);
SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle.dark);
return new MaterialApp(
title: 'Startup Name Generator',
// theme: new ThemeData(
// brightness: Brightness.dark,
// primarySwatch: Colors.blue,
// ),
// theme: new ThemeData(),
debugShowCheckedModeBanner: false,
home: new Scaffold(
// appBar: new AppBar(
//// title: new Text('Top Lakes'),
//// brightness: Brightness.light,
// ),
// backgroundColor: Colors.white,
body: new ListView(
children: [
new Padding(
padding: new EdgeInsets.fromLTRB(0.0, 40.0, 0.0, 0.0),
child: new Image.asset(
'images/lacoder-logo.png',
width: 600.0,
height: 240.0,
fit: BoxFit.fitHeight,
),
),
titleSection,
buttonSection,
textSection,
],
),
),
);
}
}
layout_widgets.dart
import 'package:flutter/material.dart';
Widget titleSection = new Container(
padding: const EdgeInsets.all(32.0),
child: new Row(children: [
new Expanded(
child: new Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
new Container(
padding: const EdgeInsets.only(bottom: 8.0),
child: new Text(
"Some-Website.com",
style: new TextStyle(
fontWeight: FontWeight.bold,
),
)
),
new Text(
'Small details',
style: new TextStyle(
color: Colors.grey[500],
)
)
],
)),
new Icon(Icons.star,color: Colors.orange[700]),
new Text('100'),
]));
I tried the method SystemChrome.setSystemUIOverlayStyle(), as far as I tested (Flutter SDK v1.9.1+hotfix.2, running on iOS 12.1) it works perfect for Android. But for iOS, e.g. if your first screen FirstScreen() doesn't have an AppBar, but the second SecondScreen() does, then at launch the method does set the color in FirstScreen(). However, after navigating back to FirstScreen() from SecondScreen(), the status bar color becomes transparent.
I come up with a hacky workaround by setting an AppBar() with zero height, then status bar's color gets changed by the AppBar, but the AppBar itself is not visible. Hope it would be useful to someone.
// FirstScreen that doesn't need an AppBar
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: PreferredSize(
preferredSize: Size.fromHeight(0),
child: AppBar( // Here we create one to set status bar color
backgroundColor: Colors.black, // Set any color of status bar you want; or it defaults to your theme's primary color
)
)
);
}
// SecondScreen that does have an AppBar
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar()
}
}
Here is the screenshot of FirstScreen in iPhone Xs Max iOS 12.1:
UPDATE:
Scaffold(
appBar: AppBar(
systemOverlayStyle: SystemUiOverlayStyle(
systemNavigationBarColor: Colors.blue, // Navigation bar
statusBarColor: Colors.pink, // Status bar
),
),
)
Old solution (still works)
Both iOS and Android:
appBar: AppBar(
backgroundColor: Colors.red, // status bar and navigation bar color
brightness: Brightness.light, // status bar brightness
)
Only for Android (More flexibility)
You can use SystemChrome class to change Status bar and Navigation bar color.
First import
import 'package:flutter/services.dart';
After this, you need to add following lines (better place to put these lines is in your main() method)
void main() {
SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
systemNavigationBarColor: Colors.blue,
statusBarColor: Colors.pink,
));
}
If you don't want AppBar at all, then you can just call setSystemUIOverlayStyle in the main function:
void main() async {
SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle.light);
runApp(new MaterialApp(
home: new Scaffold(),
));
}
It's more tricky if you have an app bar in one scaffold, and none in another. In that case I had to call setSystemUIOverlayStyle after pushing new route with a scaffold that does not have an appbar:
#override
Widget build(BuildContext context) {
final page = ModalRoute.of(context);
page.didPush().then((x) {
SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle.light);
});
return new Scaffold();
}
TLDR; you need to use Scaffold, it manages the colors even if you navigate back and forth.
Scaffold(
appBar: AppBar(brightness: Brightness.dark), \\ dark content -> white app bar
body: ...
);
If your screen does not have an app bar, then you need to use AnnotatedRegion with scaffold in order to achieve the same effect.
AnnotatedRegion(
value: SystemUiOverlayStyle.light, // this will make the app bar white
child: Scaffold(
body:
),
);
Instead of SystemUiOverlayStyle.light, you can customize it:
SystemUiOverlayStyle(
statusBarBrightness: Brightness.light,
systemNavigationBarDividerColor: Colors.blue,
...
);
I'm quite new to StackOverflow & I've never used Flutter however I have found this package that seems to make things relatively easy.
Method 1: Using the package
Once this is imported all you need to do is add this code fragment:
try {
await FlutterStatusbarcolor.setStatusBarColor(Colors.black);
} on PlatformException catch (e) {
print(e);
}
Replacing the parameter for the setStatusBarColor() should give you the desired result, a full list of colours can be found here.
Method 2: Using default functions
If this doesn't work / you don't want to add extra packages or libraries then perhaps this StackOverflow answer may help.
It involves using a similar function to the above method: getWindow().setStatusBarColor() or getActivity().getWindow().setStatusBarColor()
Replacing the parameter with the desired hex code from the same list as earlier may also result in a solution.
Hope it works/helps!
i have achieved that way
#override
void initState() {
super.initState();
// Transparent status bar
SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(statusBarColor: Colors.transparent,));
}
you can also see different properties after comma
SystemUiOverlayStyle(statusBarColor: Colors.transparent,)
just use combination of ctrl + space after comma and you will get what you can use.
Please read this flutter package. To set status bar text as black, you can set FlutterStatusbarcolor.setStatusBarWhiteForeground(false). you need to have this line of code in didChangeAppLifecycleState method with resume state so that when you go to other application and come back, the status bar text color are set to your initial setup.
Also, you need to set the your AppBar's TextTheme. like following.
Widget build(BuildContext context) {
FlutterStatusbarcolor.setStatusBarWhiteForeground(false);
return MaterialApp(
title:// title goes here
theme:// your theme goes here
home: Scaffold(
appBar: AppBar(
backgroundColor: Colors.white,
title: _loadAppBarTitle(),
textTheme: Theme.of(context).textTheme),
body: //body's goes here
);
);
Hopefully, this one can help somebody who has the similar problem with me.
Flutter 2.5.1
'brightness' is deprecated and shouldn't be used. This property is no longer used, please use systemOverlayStyle instead. This feature was deprecated after v2.4.0-0.0.pre.. Try replacing the use of the deprecated member with the replacement.
Old code
brightness: Brightness.dark,
New code
systemOverlayStyle: SystemUiOverlayStyle(
systemNavigationBarColor: Colors.blue, // Navigation bar
statusBarColor: Colors.red, // Status bar
),
Just write this code inside the AppBar
Scaffold(
drawer: const SideBar(),
appBar: AppBar(
title: const Text("SomeThing"),
systemOverlayStyle: SystemUiOverlayStyle.dark,//this is what you wanted
),
body: YourWidget()
For some reason, it didn't work for me when I put my AppBar directly in my Scaffold, so I added it like this :
Scaffold(
extendBodyBehindAppBar: true,
body: Stack (
children: [
AppBar(
automaticallyImplyLeading: false,
backgroundColor: Colors.transparent,
systemOverlayStyle: SystemUiOverlayStyle.light,
),
// ... other widgets
],
),
)
And it changed the color of both my status bar and navigation bar (background of home indicator in Android)