I've stumbled on a style I do not know how to achieve in flutter.
Basically, I have a settings page where users can see their profile picture.
As seen in the picture below, I'd like to achieve a shade around the image in the same colors as the image. I guess you could call it a bleed?
Add 2 Images in a Stack
Increase the size of the first image
Then Wrap second image BackdropFilter then add some Blur effect
you can play around with the values to get the result that you want
class MyApp extends StatelessWidget {
String NetworkImage =
'https://www.jamsadr.com/images/neutrals/person-donald-900x1080.jpg';
#override
Widget build(BuildContext context) {
return new MaterialApp(
home: Scaffold(
body: new Container(
child: new Center(
child: Stack(clipBehavior: Clip.hardEdge, children: [
Image(
image: Image.network(NetworkImage).image,
width: 360,
height: 360,
),
BackdropFilter(
filter: new ImageFilter.blur(sigmaX: 15.0, sigmaY: 15.0),
child: Image(
image: Image.network(NetworkImage).image,
width: 350,
height: 350,
),
),
]),
),
),
),
);
}
}
sample code
Container(
height: 80,
width: 80,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(30),
boxShadow: [
BoxShadow(
color: Colors.grey.withOpacity(0.5),
spreadRadius: 1,
blurRadius: 7,
offset: Offset(0, 3), // changes position of shadow
),
],
),
child: CircleAvatar(
backgroundImage: AssetImage("assets/images/cook.png"),
),
)
I want a achieve a design like the one in the second screenshot with a faded background. So the upper half of the blurred background image is already fine, just the bottom half is missing a gradient into a fixed color (like black or white).
For clarification: I want only the background to fade into black without affecting the top layer (in this case the untouched image). I tried quite long now to get a suitable solution but unfortunately I did not find any.
Current state:
Goal:
Current code (first screenshot):
Container(
color: Colors.white,
child: Container(
decoration: BoxDecoration(
image: DecorationImage(
image: CachedNetworkImageProvider(widget.storyData.coverURL),
fit: BoxFit.cover,
),
),
child: BackdropFilter(
filter: ImageFilter.blur(sigmaX: 30, sigmaY: 30),
child: Container(
child: Padding(
padding: const EdgeInsets.all(80.0),
child: Hero(
tag: widget.heroTagID,
child: CachedNetworkImage(
imageUrl: widget.storyData.coverURL,
placeholder: (context, url) => Padding(
padding: EdgeInsets.all(25),
child: Icon(Ionicons.image_outline),
),
),
),
),
),
)),
);
You can achieve that using Stack and LinearGradient.
I've replaced CachedNetworkImageProvider with simple NetworkImage so that the code can work on https://dartpad.dev/. The principle remains the same:
import 'dart:ui';
import 'package:flutter/material.dart';
final Color darkBlue = Color.fromARGB(255, 18, 32, 47);
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
debugShowCheckedModeBanner: false,
home: Scaffold(
body: Center(
child: MyWidget(),
),
),
);
}
}
class MyWidget extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Stack(
children: <Widget>[
Container(
decoration: BoxDecoration(
image: DecorationImage(
image: NetworkImage(
'https://picsum.photos/id/255/1440/3200',
),
fit: BoxFit.cover,
),
),
),
Container(
constraints: BoxConstraints.expand(),
decoration: BoxDecoration(
color: Colors.white,
gradient: LinearGradient(
begin: FractionalOffset.topCenter,
end: FractionalOffset.bottomCenter,
colors: [Colors.black.withOpacity(0.0), Colors.black],
stops: [0.0, 1.0]
)
),
),
BackdropFilter(
filter: ImageFilter.blur(sigmaX: 5, sigmaY: 5),
child: Center(
child: Padding(
padding: const EdgeInsets.all(80.0),
child: Hero(
tag: 'heroTag',
child: Image.network(
'https://picsum.photos/id/255/1440/3200',
)
),
),
)
),
],
);
}
}
You can tweak the colors and stops to get it exactly how you want it.
End result:
I am new in flutter. I want to make the transparent Circle in side the semi transparent rectangle. Look like below,
I have not idea about that. So please help me to make this type of widget in flutter.
Using ColorFiltered and Stack you can achieve this.
(I took the answer mentioned in the comment and edited to your needs)
#override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
fit: StackFit.expand,
children: [
Image.network(
'https://lh3.googleusercontent.com/proxy/_wrP_GRGOkGw0FLMiR3qeMzlyC-qN8Dd4sND89_xxLZMDIZh204g8PCccS-o9WaL1RKyiVOLGVS9QpodSkMMhOh8kbNh1CY492197-im-4vlFRRdsVqT2g4QbRlNgljDIg',
fit: BoxFit.cover,
), //Give your Image here
ColorFiltered(
colorFilter: ColorFilter.mode(
Colors.black.withOpacity(0.5),
BlendMode.srcOut,
), // This one will create the magic
child: Stack(
fit: StackFit.expand,
children: [
Container(
decoration: BoxDecoration(
color: Colors.black,
backgroundBlendMode: BlendMode.dstOut,
), // This one will handle background + difference out
),
Align(
alignment: Alignment.center,
child: Container(
height: MediaQuery.of(context).size.width,
width: MediaQuery.of(context).size.width,
decoration: BoxDecoration(
color: Colors.red,
borderRadius: BorderRadius.circular(
MediaQuery.of(context).size.width / 2,
),
),
),
),
],
),
),
],
),
);
}
I'm new to flutter and recently I tried to design a page where I have to put an image on the top of a card with half of it on the card and half of it outside the card, I tried Stack but couldn't design what I wanted!
here is an example of what I'm trying to design.
here is the code that isn't giving the desired result like the image below:
class ContainerWithCircle extends StatelessWidget {
final double circleRadius = 100.0;
final double circleBorderWidth = 8.0;
#override
Widget build(BuildContext context) {
return Stack(
alignment: Alignment.topCenter,
children: <Widget>[
Container(
width: circleRadius,
height: circleRadius,
decoration:
ShapeDecoration(shape: CircleBorder(), color: Colors.white),
child: Padding(
padding: EdgeInsets.all(circleBorderWidth),
child: DecoratedBox(
decoration: ShapeDecoration(
shape: CircleBorder(),
image: DecorationImage(
fit: BoxFit.cover,
image: NetworkImage(
'https://upload.wikimedia.org/wikipedia/commons/a/a0/Bill_Gates_2018.jpg',
))),
),
),
),
Padding(
padding: EdgeInsets.only(top: circleRadius / 2.0),
child: Container(
// Some content
),
),
],
);
}
}
In order to create a layout like the one you specified, you can simply use a Stack and place the card with a padding to the top. Resources for you to look up: Stack, DecoratedBox & CircleBOrder. The following code shows an example implementation:
class ContainerWithCircle extends StatelessWidget {
final double circleRadius = 100.0;
final double circleBorderWidth = 8.0;
#override
Widget build(BuildContext context) {
return Stack(
alignment: Alignment.topCenter,
children: <Widget>[
Padding(
padding: EdgeInsets.only(top: circleRadius / 2.0),
child: Container(
//replace this Container with your Card
color: Colors.white,
height: 200.0,
),
),
Container(
width: circleRadius,
height: circleRadius,
decoration:
ShapeDecoration(shape: CircleBorder(), color: Colors.white),
child: Padding(
padding: EdgeInsets.all(circleBorderWidth),
child: DecoratedBox(
decoration: ShapeDecoration(
shape: CircleBorder(),
image: DecorationImage(
fit: BoxFit.cover,
image: NetworkImage(
'https://upload.wikimedia.org/wikipedia/commons/a/a0/Bill_Gates_2018.jpg',
))),
),
),
)
],
);
}
}
I am trying to set a background image for the home page. I am getting the image place from start of the screen and filling the width but not the height.
Am I missing something in my code? Are there image standards for flutter? Do images scale based on each phone's screen resolution?
class BaseLayout extends StatelessWidget{
#override
Widget build(BuildContext context){
return Scaffold(
body: Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Image.asset("assets/images/bulb.jpg")
]
)
)
);
}
}
I'm not sure I understand your question, but if you want the image to fill the entire screen you can use a DecorationImage with a fit of BoxFit.cover.
class BaseLayout extends StatelessWidget{
#override
Widget build(BuildContext context){
return Scaffold(
body: Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage("assets/images/bulb.jpg"),
fit: BoxFit.cover,
),
),
child: null /* add child content here */,
),
);
}
}
For your second question, here is a link to the documentation on how to embed resolution-dependent asset images into your app.
If you use a Container as the body of the Scaffold, its size will be accordingly the size of its child, and usually that is not what you want when you try to add a background image to your app.
Looking at this other question, #collin-jackson was also suggesting to use Stack instead of Container as the body of the Scaffold and it definitely does what you want to achieve.
This is how my code looks like
#override
Widget build(BuildContext context) {
return new Scaffold(
body: new Stack(
children: <Widget>[
new Container(
decoration: new BoxDecoration(
image: new DecorationImage(image: new AssetImage("images/background.jpg"), fit: BoxFit.cover,),
),
),
new Center(
child: new Text("Hello background"),
)
],
)
);
}
Screenshot:
Code:
#override
Widget build(BuildContext context) {
return DecoratedBox(
decoration: BoxDecoration(
image: DecorationImage(image: AssetImage("your_asset"), fit: BoxFit.cover),
),
child: Center(child: FlutterLogo(size: 300)),
);
}
You can use Stack to make the image stretch to the full screen.
Stack(
children: <Widget>
[
Positioned.fill( //
child: Image(
image: AssetImage('assets/placeholder.png'),
fit : BoxFit.fill,
),
),
...... // other children widgets of Stack
..........
.............
]
);
Note: Optionally if are using a Scaffold, you can put the Stack inside the Scaffold with or without AppBar according to your needs.
I was able to apply a background below the Scaffold (and even it's AppBar) by putting the Scaffold under a Stack and setting a Container in the first "layer" with the background image set and fit: BoxFit.cover property.
Both the Scaffold and AppBar has to have the backgroundColor set as Color.transparent and the elevation of AppBar has to be 0 (zero).
Voilà! Now you have a nice background below the whole Scaffold and AppBar! :)
import 'package:flutter/material.dart';
import 'package:mynamespace/ui/shared/colors.dart';
import 'package:mynamespace/ui/shared/textstyle.dart';
import 'package:mynamespace/ui/shared/ui_helpers.dart';
import 'package:mynamespace/ui/widgets/custom_text_form_field_widget.dart';
class SignUpView extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Stack( // <-- STACK AS THE SCAFFOLD PARENT
children: [
Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage("assets/images/bg.png"), // <-- BACKGROUND IMAGE
fit: BoxFit.cover,
),
),
),
Scaffold(
backgroundColor: Colors.transparent, // <-- SCAFFOLD WITH TRANSPARENT BG
appBar: AppBar(
title: Text('NEW USER'),
backgroundColor: Colors.transparent, // <-- APPBAR WITH TRANSPARENT BG
elevation: 0, // <-- ELEVATION ZEROED
),
body: Padding(
padding: EdgeInsets.all(spaceXS),
child: Column(
children: [
CustomTextFormFieldWidget(labelText: 'Email', hintText: 'Type your Email'),
UIHelper.verticalSpaceSM,
SizedBox(
width: double.maxFinite,
child: RaisedButton(
color: regularCyan,
child: Text('Finish Registration', style: TextStyle(color: white)),
onPressed: () => {},
),
),
],
),
),
),
],
);
}
}
We can use Container and mark its height as infinity
body: Container(
height: double.infinity,
width: double.infinity,
child: FittedBox(
fit: BoxFit.cover,
child: Image.network(
'https://cdn.pixabay.com/photo/2016/10/02/22/17/red-t-shirt-1710578_1280.jpg',
),
),
));
Output:
body: Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage('images/background.png'),fit:BoxFit.cover
)
),
);
decoration: BoxDecoration(
image: DecorationImage(
image: ExactAssetImage("images/background.png"),
fit: BoxFit.cover
),
),
this also works inside a container.
Other answers are great. This is another way it can be done.
Here I use SizedBox.expand() to fill available space and for passing tight constraints for its children (Container).
BoxFit.cover enum to Zoom the image and cover whole screen
Widget build(BuildContext context) {
return Scaffold(
body: SizedBox.expand( // -> 01
child: Container(
decoration: BoxDecoration(
image: DecorationImage(
image: NetworkImage('https://flutter.github.io/assets-for-api-docs/assets/widgets/owl-2.jpg'),
fit: BoxFit.cover, // -> 02
),
),
),
),
);
}
To set a background image without shrinking after adding the child, use this code.
body: Container(
constraints: BoxConstraints.expand(),
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage("assets/aaa.jpg"),
fit: BoxFit.cover,
)
),
//You can use any widget
child: Column(
children: <Widget>[],
),
),
You can use the following code to set a background image to your app:
class HomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage("images/background.jpg"),
fit: BoxFit.cover,
),
),
// use any child here
child: null
),
);
}
If your Container's child is a Column widget, you can use the crossAxisAlignment: CrossAxisAlignment.stretch to make your background image fill the screen.
I know there is a lot of answers to this question already, but this solution comes with a color gradient around the background image, I think you would like it
import 'package:flutter/material.dart';
class BackgroundImageExample extends StatelessWidget {
const BackgroundImageExample({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return Stack(
children: [
backgroudImage(),
Scaffold(
backgroundColor: Colors.transparent,
body: SafeArea(
child: Column(
children: [
// your body content here
],
),
),
),
],
);
}
Widget backgroudImage() {
return ShaderMask(
shaderCallback: (bounds) => LinearGradient(
colors: [Colors.black, Colors.black12],
begin: Alignment.bottomCenter,
end: Alignment.center,
).createShader(bounds),
blendMode: BlendMode.darken,
child: Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage('your image here'), /// change this to your image directory
fit: BoxFit.cover,
colorFilter: ColorFilter.mode(Colors.black45, BlendMode.darken),
),
),
),
);
}
}
Stack(
children: [
SizedBox.expand(
child: FittedBox(
fit: BoxFit.cover,
child: Image.asset(
Images.splashBackground,
),
)
),
your widgets
])
This Helped me
import 'package:flutter/material.dart';
void main() => runApp(DestiniApp());
class DestiniApp extends StatefulWidget {
#override
_DestiniAppState createState() => _DestiniAppState();
}
class _DestiniAppState extends State<DestiniApp> {
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: SafeArea(
child: Scaffold(
appBar: AppBar(
backgroundColor: Color.fromRGBO(245, 0, 87, 1),
title: Text(
"Landing Page Bankground Image",
),
),
body: Container(
decoration: BoxDecoration(
image: DecorationImage(
image: ExactAssetImage("images/appBack.jpg"),
fit: BoxFit.cover
),
),
),
),
),
);
}
}
Output:
#override
Widget build(BuildContext context) {
return Scaffold(
body: SingleChildScrollView(
child: Container(
decoration: const BoxDecoration(
image: DecorationImage(
image: AssetImage('assets/bgmain.jpg'),
//fit: BoxFit.cover
fit: BoxFit.fill),
),
child: Column(
children:
[
//
],
),
)));
}
Image.asset(
"assets/images/background.png",
fit: BoxFit.cover,
height: double.infinity,
width: double.infinity,
alignment: Alignment.center,
),
if still there is a problèm, it' seem like your image is not perfection in the heigth and width
Here is how you can achieve this. First example is with assets image and the second one is with network image.
Local image:
Container(
height: 200,
width: double.infinity,
decoration: const BoxDecoration(
image: DecorationImage(
image: AssetImage("assets/images/cat2.jpg"),
fit: BoxFit.cover),
),
child:
)
Network image:
Container(
height: 200,
width: double.infinity,
decoration: const BoxDecoration(
image: DecorationImage(
image: NetworkImage("https://picsum.photos/id/237/200/300"),
fit: BoxFit.cover),
),
child:
)
You can use FractionallySizedBox
Sometimes decoratedBox doesn't cover the full-screen size.
We can fix it by wrapping it with FractionallySizedBox Widget.
In this widget we give widthfactor and heightfactor.
The widthfactor shows the [FractionallySizedBox]widget should take _____ percentage of the app's width.
The heightfactor shows the [FractionallySizedBox]widget should take _____ percentage of the app's height.
Example : heightfactor = 0.3 means 30% of app's height. widthfactor = 0.4 means 40% of app's width.
Hence, for full screen set heightfactor = 1.0 and widthfactor = 1.0
Tip: FractionallySizedBox goes well with the stack widget. So that you can easily add buttons, avatars, texts over your background image in the stack widget whereas in rows and columns you cannot do that.
For more info check out this project's repository github repository link for this project
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: SafeArea(
child: Stack(
children: <Widget>[
Container(
child: FractionallySizedBox(
heightFactor: 1.0,
widthFactor: 1.0,
//for full screen set heightFactor: 1.0,widthFactor: 1.0,
child: DecoratedBox(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage("images/1.jpg"),
fit: BoxFit.fill,
),
),
),
),
),
],
),
),
),
);
}
}
OutPut:
It can be done either of the following ways, based on your requirement:
Background image spanning accross the app Bar
Scaffold(
extendBodyBehindAppBar: true,
appBar: AppBar(
elevation: 0,
title: const Text(
"Home Page",
style: TextStyle(color: Colors.white),
),
backgroundColor: Colors.transparent,
),
body: Container(
height: double.infinity,
width: double.infinity,
decoration: const BoxDecoration(
image: DecorationImage(
fit: BoxFit.fill,
image: NetworkImage(
'https://wallpaperaccess.com/full/2440003.jpg'))
child: < Your Widgets go here >
),
));
Background image not spanning accross the app Bar
Scaffold(
appBar: AppBar(
elevation: 0,
title: const Text(
"Home Page",
style: TextStyle(color: Colors.black),
),
backgroundColor: Colors.transparent,
),
body: Container(
height: double.infinity,
width: double.infinity,
decoration: const BoxDecoration(
image: DecorationImage(
fit: BoxFit.fill,
image: NetworkImage(
'https://wallpaperaccess.com/full/2440003.jpg'))
child: < Your Widgets go here >
),
));
Extra :
To add background image only to the appBar refer this answer