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I'm trying to create a return Material with an Image as a background.
This is my code:
return Material(
//I tried add this code
child: Container(
decoration: BoxDecoration(
image: DecorationImage(
fit: BoxFit.fill,
image: AssetImage('assets/img1.png'))
),
color: Colors.white,
//======================
child: Stack(
children: <Widget>[
Container(
....
text("Some text");)
]
)
How can I set background for return Material?
You can use a container and show the image in Decoration
Material(
//I tried add this code
child: Container(
decoration: BoxDecoration(
image: DecorationImage(
fit: BoxFit.fill,
image: AssetImage('assets/img1.png'))),
color: Colors.white,
))
From this question I am using Flutter's SVG package (flutter_svg) to render a SVG image.
I want to use the SVG as a Container background with Text in the middle.
This is the code I have so far:
Container(
decoration: BoxDecoration(
image: DecorationImage(image: SvgPicture.asset(
'assets/example.svg',
),),
),
children: <Widget>[
Text('Welcome to my Flutter App',
style: Theme.of(context).textTheme.display1.copyWith(
color: Colors.white,
fontWeight: FontWeight.bold
)
),
],
)
The problem I am finding is that SvgPicture is not an ImageProvider so I can't add the BoxDecoration to get a background image.
Is there a way to then use SvgPicture as a Container's box decoration or background?
The exact way to use an SvgPicture is like this:
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: <Widget>[
SvgPicture.asset(
'assets/images/splash/background.svg',
alignment: Alignment.center,
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
),
Container(
child: Column(
children: <Widget>[Expanded(child: _createLogo())],
),
),
],
),
);
}
how about using a stack() and build everything on top of that. That is how I have done it with just an image as a background for the full viewport.
You can also use flutter_svg_provider
Like this :
import 'package:flutter_svg_provider/flutter_svg_provider.dart';
Container(
decoration: BoxDecoration(
image: DecorationImage(image: Svg(
'assets/example.svg',
),),
),
)
I would like to have a background image with text inputs but I don't know which widget I should use to avoid the background image to shrink when my keyboard is active.
Here you can find two screen shots of the problem and my code:
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
var backgroundImage = new BoxDecoration(
image: new DecorationImage(
image: new AssetImage('assets/forest.jpg'), fit: BoxFit.cover));
return new MaterialApp(
home: new Scaffold(
body: new Stack(
children: <Widget>[
new Container(
decoration: backgroundImage,
),
new TextField()
],
)));
}
}
closed keyboard
active keyboard
Put Container outside of Scaffold, and make Scaffold as a child of Container with the background image.
return Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage('assets/bg.png'),
fit: BoxFit.cover,
),
),
child: Scaffold(
backgroundColor: Colors.transparent,
body: ListView(
children: <Widget>[
TextFormField(
decoration: InputDecoration(
hintText: "Email",
),
),
],
),
),
);
You can use the property resizeToAvoidBottomPadding from Scaffold :
Scaffold(
resizeToAvoidBottomPadding: false,
...
It's the default functionality of the flutter to keep UI above the keyboard so if you set resizeToAvoidBottomInset : false then you will lose the functionality of keeping your UI components above the keyboard
To have a background image in your application, and not to shrink it
better way is to do it like this
Container(
decoration: BoxDecoration(
color: primaryColor, // background color
image: DecorationImage(image: AssetImage(AppImages.appBg)),// background image above color
),
child: SafeArea(
child: Scaffold(
backgroundColor: Colors.transparent, //**IMPORTANT**
body: //All Ui code here//),
),
It is necessary to set Scaffold backgroundColor: Colors.transparent
otherwise, you won't be able to see your background image
I'm creating a login screen, and i have this background image,
the problem is when the user clicks one of the TextFields and the keyboard pops, the background image changes its size to fit the new screen size (excluding the keyboard).
I want the background to stay persistent and the same size, i would use BoxFit.none, but i'm afraid it will hurt the responsiveness of the app.
Here's the code:
new Container(
decoration: new BoxDecoration(
color: Colors.red,
image: new DecorationImage(
fit: BoxFit.cover,
image: new AssetImage(
'assets/images/splash_screen/background.png'))),
child: new Center(
child: new ListView(
physics: new PageScrollPhysics(),
children: <Widget>[ //Login screen content ],
),
),
);
I also tried to define BoxConstraints with minHeight of the device screen but it doesn't help, and used Stack as well but with not luck.
Here's what i mean by changing dimensions:
No Keyboard / With Keyboard
Put your Scaffold as a child of a Container and make it transparent
final emailField = TextFormField(
decoration: InputDecoration(
hintText: "Email",
),
);
return Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage('assets/bg.png'),
fit: BoxFit.cover,
),
),
child: Scaffold(
backgroundColor: Colors.transparent,
body: ListView(
children: <Widget>[
emailField,
],
),
),
);
Try using a Stack, with your image in a Positioned, with a BoxFit of fill. Then, set top: 0.0. This way, its height shouldn't be influenced by the height of the bottom of the screen (i.e. it shouldn't change when the keyboard comes up), and its size should remain the same.
Example:
return Stack(
children: <Widget>[
Positioned(
top: 0.0,
child: Image.asset(
'assets/images/splash_screen/background.png',
fit: BoxFit.fill,
),
),
Center(
child: ListView(
physics: PageScrollPhysics(),
children: <Widget>[
//Login screen content
],
),
),
],
);
Try going to to your Scaffold (or use one) and set
resizeToAvoidBottomPadding = false
You can try this, It works well
import 'package:flutter/material.dart';
class SignUpView extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Stack(children: [
Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage("assets/images/background.png"),
fit: BoxFit.cover,
))),
Scaffold(
resizeToAvoidBottomInset: false,
backgroundColor: Colors.transparent,
appBar: AppBar(
title: Text('NEW USER'),
backgroundColor: Colors.transparent,
elevation: 0,
),
body: Padding(
padding: EdgeInsets.all(10),
child: ListView(children: <Widget>[])))
]);
}
}
I have the background of my app set like so:
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new MaterialApp(
home: new Container(
decoration: new BoxDecoration(
image: new DecorationImage(
image: new ExactAssetImage('assets/lol/aatrox.jpg'),
fit: BoxFit.cover,
),
),
child: new BackdropFilter(filter: new ImageFilter.blur(sigmaX: 600.0, sigmaY: 1000.0)),
width: 400.0,
),
);
}
}
I'm wanting to blur the DecorationImage, so I added a BackdropFilter to the Container, but I don't see any change. What am I doing wrong?
You could do something like this, by blurring the container child instead.
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new MaterialApp(
home: new Container(
decoration: new BoxDecoration(
image: new DecorationImage(
image: new ExactAssetImage('assets/dog.png'),
fit: BoxFit.cover,
),
),
child: new BackdropFilter(
filter: new ImageFilter.blur(sigmaX: 10.0, sigmaY: 10.0),
child: new Container(
decoration: new BoxDecoration(color: Colors.white.withOpacity(0.0)),
),
),
),
);
}
}
Screenshot:
Using Stack:
SizedBox(
height: 200,
child: Stack(
fit: StackFit.expand,
children: [
Image.asset('chocolate_image', fit: BoxFit.cover),
ClipRRect( // Clip it cleanly.
child: BackdropFilter(
filter: ImageFilter.blur(sigmaX: 10, sigmaY: 10),
child: Container(
color: Colors.grey.withOpacity(0.1),
alignment: Alignment.center,
child: Text('CHOCOLATE'),
),
),
),
],
),
)
Without using Stack:
Container(
height: 200,
width: double.maxFinite,
decoration: BoxDecoration(
image: DecorationImage(
image: ExactAssetImage("your_chocolage_image"),
fit: BoxFit.cover,
),
),
child: ClipRRect( // make sure we apply clip it properly
child: BackdropFilter(
filter: ImageFilter.blur(sigmaX: 10, sigmaY: 10),
child: Container(
alignment: Alignment.center,
color: Colors.grey.withOpacity(0.1),
child: Text(
"CHOCOLATE",
style: TextStyle(fontSize: 28, fontWeight: FontWeight.bold),
),
),
),
),
)
As I mentioned here, you should wrap your ImageFiltered widget in a ClipRRect to prevent it from flowing out the widget boundaries. Here's the code:
ClipRRect(
child: ImageFiltered(
imageFilter: ImageFilter.blur(sigmaX: 3, sigmaY: 3),
child: Image.asset('assets/flutter_image.png'),
),
),
This is the output:
ImageFiltered is the perfect widget for that . It creates a widget that applies an ImageFilter to its child.
ImageFilter is an easy way to blur or transform pixels in your app . You can import it from dart:ui
Code :
ImageFiltered(
imageFilter: ImageFilter.blur(sigmaY:5,sigmaX:5), //SigmaX and Y are just for X and Y directions
child: Image.asset('assets/image.png') //here you can use any widget you'd like to blur .
)
ImageFilter.blur() make anything blurry and
ImageFilter.matrix() lets you use any matrix for
transformation ,scaling , translating , skewing and rotating
Output :
A similar widget to ImageFiltered is BackdropFilter .
BackdropFilter lets you apply filter to everything that's painted
beneath a widget , instead of applying the filter to the widget
itself.
It's also less performant . If you can do your effect with
ImageFiltered , Use it instead of BackdropFilter.
You can learn more about ImageFiltered by watching this official video or by visiting flutter.dev
It's better if you put in ClipRRect, like this :
Container(
child: ClipRRect(
child: Stack(
children: <Widget>[
FadeInImage.assetNetwork(
placeholder: placeholder,
image: thumbnail,
fit: BoxFit.cover,
),
BackdropFilter(
child: Container(
color: Colors.black12,
),
filter: ImageFilter.blur(sigmaY: 10, sigmaX: 10),
)
],
),
),
width: double.infinity,
),
This case apply for Image (Thumbnail) list items correctly.
All the above answers are correct, I'll reply to #user123456 here since I can't comment yet.
can i make the BoxDecoration image clickeble – user123456
Just wrap the whole Container with a GestureDetector
GestureDetector(
onTap: () {...},
child: Container(
...
decoration: BoxDecoration(...),
),
);
You can use Image widget. It's very simple.
Image(
image: AssetImage("assets/images/news-media.png"),
color: Colors.black,
colorBlendMode: BlendMode.softLight,
fit: BoxFit.fill,
),