It uses the background image for whole application.
So My plan is use Stack including backgroundimage and Scaffold on it.
In this code, it shows Title.png but dosent show BackGround.png
Where should I fix??
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Stack(
children: <Widget>[
new Image.asset('images/BackGround.png',
fit: BoxFit.cover,
),
Scaffold(
body: Center(
child: Image.asset('images/Title.png')
),
),
],
),
);
}
I think it is showing your "BackGround.png" image. But, "Title.png" image is overlay above it. That's why you're not able to view it.
To check out if it is rendered or not just replace your code as following,
home: Stack(
children: <Widget>[
Scaffold(
body: Center(
child: Image.asset('images/Title.png')
),
),
new Image.asset('images/BackGround.png',
fit: BoxFit.cover,
),
],
),
Stack always renders his first child, then second and then so on. So, in your case, whichever background you want to upload above all, should be on top.
Place your Scaffold inside Container with a background image and use Colors.transparent for Scaffold's backgroundColor property like this:
Container(
//your image here
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage("assets/bg.jpg"),
fit: BoxFit.cover,
),
),
//your Scaffold goes here
child: Scaffold(
backgroundColor: Colors.transparent,
body: Container(),
),
);
Related
I want to remove the strange padding on top of the status bar. I am simply using an image and want to put that image on top of the screen that is behind the status bar. So that the status bar icons should be overlayed on the image.
Simply using Scaffold as a parent widget and then simple an Image. Screen shot is here!
The icons are not properly overlapping the image, and there is a white padding on top head!
I am using an Android Emulator right now, can somebody please figure out what I am missing.
class PreSignInScreen extends StatelessWidget {
final PreSignInController controller = Get.put(PreSignInController());
#override
Widget build(BuildContext context) {
return Scaffold(
body: SingleChildScrollView(
child: Column(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
const SizedBox(
height: 10,
),
getRedCarBox(context),
]
);
)
}
Thanks & Advance
Try below code, I have tried
- Scaffold
- Column
- Container
- Image
Your Widget:
Scaffold(
body: Column(
children: [
Container(
width: double.infinity,
height: 300,
decoration: BoxDecoration(
image: DecorationImage(
fit: BoxFit.fill,
image: NetworkImage(
'https://cdn.pixabay.com/photo/2022/03/27/11/23/cat-7094808__340.jpg',
),
),
),
),
//Add your other widgets here
],
),
),
Or Using SafeArea, top property false
SafeArea(
top: false,
child: Container(),
),
Result Screen->
Try this:
#override
Widget build(BuildContext context) {
return WillPopScope(
onWillPop: () async {
return false;
},
child: Scaffold(
body: SafeArea(
top: false,
bottom: false,
child: _buildBody(),
),
),
);
}
Scaffold(
body: SafeArea(
top: false,
bottom: false,
child: _yourBody(),
),
Why to use SafeArea :
SafeArea class Null safety. A widget that insets its child by sufficient padding to avoid intrusions by the operating system. For example, this will indent the child by enough to avoid the status bar at the top of the screen.
I need help. At the moment I'm trying to implement a background on my login page.
My problem is that I use a custom shape painter which shows my background.
To make my login page more dynamic I have added a function resizeToAvoidBottomInset: true, to move the textfield over the keyboard.
But now I have the problem that my background will be smaller if I click on my text field.
Here is my login page:
My code:
class _DebugPage extends State<DebugPage> {
#override
Widget build(BuildContext context) {
return Scaffold(
resizeToAvoidBottomInset: true,
appBar: customSubAppBar('Debug', context),
body: Stack(
children: [
//my custom shape painter
Expanded(
child: CustomeShapePainer(),
),
//my custom widgets
_body(context),
],
),
);
}
}
Is there a way to set the background on fix size?
I think you can try set widget CustomeShapePainer wrap Widget Stack. I don't remember exactly but in some projects I did
child: SingleChildScrollView(
child: Container(
color: AppConstants.bgColor,
height: MediaQuery.of(context).size.height,
width: MediaQuery.of(context).size.width,
child: CustomPaint(
painter: CurvePainter(),
child: Stack
I have a PageView with Stack children. those Stack widgets contain transparent containers that controlls the opacity level relative to the scroll position.
the expense is that now I am unable to scroll what's in the background. what is the best way to add that layer and keep my backround scroll active.
Updating the Listview widget seems expensive as the opacity transion changes that is why I tried to keep it separate
I have something like this
Stack(children: [
Scaffold(
body: SafeArea(
child: Container(
color: Colors.white,
child: ListView..., // the listView I am trying to scroll
),
),
),
currIndex == 1 ? MainCardTransitionContainer() : Container(), // the layer with opacity
]),
Try IgnorePointer:
Stack(children: [
Scaffold(
body: SafeArea(
child: Container(
color: Colors.white,
child: ListView..., // the listView I am trying to scroll
),
),
),
currIndex == 1 ? IgnorePointer(ignoring: true, child:MainCardTransitionContainer(),) : Container(), // the layer with opacity
]),
Try this
Stack(children: [
currIndex == 1 ? MainCardTransitionContainer() : Container(), // the layer with opacity
Scaffold(
body: SafeArea(
child: Container(
color: Colors.white,
child: ListView..., // the listView I am trying to scroll
),
),
),
]),
It's because the top widget of stack is kept at background and last widget is placed in foreground.
In short keep background element at top of stack
I am trying to create something like CircleAvatar, but with a Stacked widget having a CircularProgressIndicator and a FadeInImage.memoryNetwork as children so that I get a nice loading animation (bonus: placeholder image) when I fetch the image on slow Internet.
Everything else is working fine but I am not being able to figure out how to crop the fetched image into a circular form. I read here that I can use a ClipOval, but I couldn't find any tutorial on how to use it.
Stack(children: <Widget>[
Center(child: CircularProgressIndicator(valueColor: new AlwaysStoppedAnimation<Color>(Colors.lightBlue))),
Center(
child: FadeInImage.memoryNetwork(
placeholder: kTransparentImage,
image:
'https://s3-media2.fl.yelpcdn.com/bphoto/7BlRoSOG3AsAWHMPOaG7ng/ls.jpg',
),
),
],
),
));
Note: I am using transparent_image library for the placeholder to get a transparent placeholder while displaying the loading animation.
This is what I am using in one of my projects, I guess you can create something similar, then instead of using FadeInImage directly use the custom widget.
class AvatarFadeImage extends StatelessWidget {
final String imageUrl;
AvatarFadeImage(this.imageUrl);
#override
Widget build(BuildContext context) {
return ClipOval(
child: FadeInImage.memoryNetwork(
placeholder: kTransparentImage,
image: imageUrl,
fit: BoxFit.contain,
),
);
}
}
Use it like this:
Stack(children: <Widget>[
Center(child: CircularProgressIndicator(valueColor: new AlwaysStoppedAnimation<Color>(Colors.lightBlue))),
Center(
child: AvatarFadeImage("https://s3-media2.fl.yelpcdn.com/bphoto/7BlRoSOG3AsAWHMPOaG7ng/ls.jpg"),
),
],
),
));
PS: You may also look at https://pub.dartlang.org/packages/cached_network_image and https://flutter.io/cookbook/images/cached-images/
Plugin might just do the trick for you.
Just in case this helps anyone, the modified code which worked for me:
Stack(
fit: StackFit.passthrough,
children: <Widget>[
Center(
child: CircularProgressIndicator(
valueColor: AlwaysStoppedAnimation<Color>(Colors.lightBlue))),
Center(
child: ClipOval(
child: FadeInImage.memoryNetwork(
fit: BoxFit.contain,
placeholder: kTransparentImage,
image: 'https://s3-media2.fl.yelpcdn.com/bphoto/7BlRoSOG3AsAWHMPOaG7ng/ls.jpg',
),
),
),
],
),
));
How can I replace the AppBar title with image logo in Flutter?
The title property takes a Widget, so you can pass any widget to it.
For example, an image added to assets
Scaffold(
appBar: AppBar(
title: Image.asset('assets/title.png', fit: BoxFit.cover),
),
body: ...
)
More info
appBar: AppBar(
title: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Image.asset(
'assets/logo.png',
fit: BoxFit.contain,
height: 32,
),
Container(
padding: const EdgeInsets.all(8.0), child: Text('YourAppTitle'))
],
),
)
App themes are probably best long term. (Make sure you've properly added the logo image to your assets folder and updated 'pubspec.yaml' file too).
Create a folder (e.g. 'themes') in your /lib path.
Create a "style" file (e.g. 'style.dart') in that folder. (Use this file also to implement different themes for your app: colors, fonts, etc.)
Create an image widget in your 'style' file, e.g. (height, weight, path, alignment up to you):
Image appLogo = new Image(
image: new ExactAssetImage("assets/images/AppLogo.png"),
height: 28.0,
width: 20.0,
alignment: FractionalOffset.center);
In the title field of your AppBar, add 'appLogo' (or whatever you
named the widget), like this (don't forget to import your 'style' file):
child: Scaffold(
appBar: AppBar(
title: appLogo,
),
Now, if ever you need to change this logo, you simply need to edit your style.dart file with the new image path and that's it. And if you have different themes and name your widgets the same way in each style file, you'll also be able to rapidly implement different styles (e.g. 'style1', 'style2', etc.) on the fly just by importing the respective file in just a couple places.
The problem is that the AppBar does not fit it Height with the image size. To solve this problem, i've set the image and the AppBar Height (including the padding)
Here's my code:
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Image.asset(
"assets/images/logo_light.png",
fit: BoxFit.contain,
height: 72,
),
toolbarHeight: 88,
actions: [
IconButton(onPressed: () => {}, icon: Icon(Icons.search)),
],
),
);
AppBar(
centerTitle: true,
title: Image.asset('assets/your_logo.png', height: 32),
backgroundColor: Theme.of(context).primaryColor,
)
the above didn't quite work for me, this adds the picture background I want to the entire app bar and leaves the option to keep a title. updated for flutter/dart 2.0 null safety
Scaffold(
backgroundColor: Colors.black,
appBar: AppBar(
title: Text('App Bar!'),
flexibleSpace: Image(
image: AssetImage('images/bar1.jpg'),
fit: BoxFit.cover,
),
backgroundColor: Colors.transparent,
),
body: Container()
)