I am working the project and there is requirement to not use fixed width and height. However, I am getting pixel overflowed error. I used Expanded and other widgets but still getting an error. Code look likes this.
#override
Widget build(BuildContext context) {
return Scaffold(
child: InteractiveViewer(
minScale: 1,
maxScale: 1,
child: Center(
child: SingleChildScrollView(
child: Column(
children: [w],
),
),
),
),
);
}
In Column children we can add multiple children and page height grows with it. However, using Expanded widget is not solving the issue and getting pixel overflowed error. Using Container and MediaQuery is not required. Any solution will be appreciated. Thanks.
you can try this:
Container(height:MediaQuery.of(context).size.height,
width:MediaQuery.of(context).size.width,
child: SingleChildScrollView(
child: Column(
children: [w],
),),)
Related
Unfortunately the Keyboard hides the TextField if it gets opened.
I also tried resizeToAvoidBottomInset: true, but it remains causing Render OverFlow error.
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: getPrimaryDarkColor(),
resizeToAvoidBottomInset: true,
body: Stack(
children: [
Positioned(
bottom: -10,
child: Image.asset(
"assets/login_path_background.png",
width: 350,
color: getPrimaryColor().withOpacity(0.4),
),
),
Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
How can I fix this?
wrap the body in a SingleChildScrollView
Wrap the Column in a SizedBox with device height as it’s height and the device width as it’s width. Then, inside that SizedBox, wrap the Column with a SingleChildScrollView. I had this same exact issue and just using a SingleChildScrollView does not work because the Stack item has no specific size or position. When you wrap the whole SingleChildScrollView in a SizedBox with the device size it works. Hope this helps!
Code
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
appBar: AppBar(
title: Text('Search Families'),
centerTitle: true,
),
backgroundColor: StaticEntry.backColor,
body: Center(
child: FractionallySizedBox(
widthFactor: 0.8,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
SearchInput(onSubmitHandler: onSubmit),
SizedBox(
height: 300,
),
resultList.isNotEmpty
? Container( // <---------------- Container that I am using to wrap the list view widget
height: 400, // <---------------- fixed height I am setting on the container that is wrapped around the ListView widget
child: ListView.builder( // <---------------- ListView widget
itemCount: 20,
itemBuilder: (context, index) {
return Text('Heyyyy!');
},
),
)
: SizedBox()
],
),
),
),
),
);
}
Problem
In the above code, as I have pointed using arrows, I am wrapping a ListView widget in a Container and assigning a fixed height to that Container since ListView widgets has an infinite height by default.
The problem with this approach is, since that height I am providing to the container is a fixed height, the layout breaks on devices with small viewport heights, while it works fine with devices that has a large viewport height.
So what I am trying to figure out is, how can I set a height to that Container that works on all devices without breaking the layout? (I am trying to make that height as maximum as possible without making the app break on smaller devices.)
(While researching about this, I came across this stack overflow link and according to that link, I tried wrapping the ListView widget with a Flexible widget and set the shrinkWrap property of the ListView widget to true. This did not work and it caused my ListView widget and the other widget to gain as much space as possible between them and pushed my ListView widget to the bottom of the screen.)
I have this SingleChildScrollView Widget to make Column scrollable. However, I get the overflow error. I looked up on Flutter site to find necessary input but the example is not even showing up on my screen. How can I make this widget scrollable?
Widget build(BuildContext context) {
return SingleChildScrollView(
child: AnimatedContainer(
duration: Duration(seconds: 2),
margin: EdgeInsets.only(top: 10),
curve: Curves.fastOutSlowIn,
width: 300,
height: 500,
color: Colors.lightBlue,
child: Center(
child: Column(
children: [
aa(),
bb(),
cc(),
dd(),
],
),
),
),
);
}
It would be helpful to know constraints/sizes of these widgets aa(), bb(), cc(), dd() and also see build() method to better suggest you a solution.
But i think the issue is that you explicitly set height of AnimatedContainer to be 500 pixels, and children of these parent are taller than 500px and that's why you get overflow error. Try to not to set static heights like that. If you delete the height field i think AnimatedContainer will adjust to take such space that you won't get overflow error.
I have two widgets in a row. The first widget is a black line with width 5.0, the second widget is a text widget whose size may vary according to the content. I want the first container to have the same height as of the second widget
One way is to make both widget child of an IntrinsicHeight widget and then declare the height of the first container as double.infinity. This should solve your problem. Example code is given below:
IntrinsicHeight(
child: Row(
children: <Widget>[
Container( //this is the first container
height: double.infinity
),
secondWidget(
)
],
)
Let me know if you have further query. Happy coding!
You can use Expanded widget. It divides siblings to the same height or width.
here is the code:
Row(
children: <Widget>[
Expanded(
child: Container(
color: Colors.red,
),
),
Expanded(
child: Container(
color: Colors.green,
),
)
And here is the result:
That is so easy. I wish it could help.
child:Column(
children: <Widget>[
Container(
height: double.infinity,
width: 100.0,
color: Colors.red,
child: Text('hello'),
),)
in this,when i make height:double.infinity,it gives error in run saying **BoxConstraints forces an infinite height.**but when i give height manually it work fine.
can anyone explain me why this happening.
How about this one.
class _MyHomePageState extends State<MyHomePage> {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
children: <Widget>[
Expanded(
child: Container(
// height: double.infinity,
width: 100.0,
color: Colors.red,
child: Text('hello'),
),
),
],
),
),
);
}
}
This means that you can't offer inifite height to the container. It's obvious behaviour if you don't provide the contraints to height.
You have to specify limited height to the container so that flutter can render it, if you offer it infinite it how can flutter render that and up to which constraints it would do that !
Rather you can set double.infinity to width and flutter will successfully render that because by default flutter has constraints for width it will set width to width of screen.
Considering that you have to provide height as that of screen you can use MediaQuery for that
Widget yourMethod(or build)(BuildContext context){
final screenHeight = MediaQuery.of(context).size.height;
return Column(
children:<Widget>[
Container(
height:screenHeight,//but this will be height of whole screen. You need to substract screen default paddings and height of appbar if you have one
width:100.0,
....
)
]);
}
Hope this helps !
Happy coding..
BoxConstraints forces an infinite height
Why This Happens
You're asking to render an infinite height object without a height constraint... Flutter can't do that.
Column lays out children in two phases:
Phase 1: non-Flex items (anything not Expanded, Flexible or Spacer)
done in unconstrained space
Phase 2: Flex items (Expanded,Flexible, Spacer only)
done with remaining space
Phase 1
Column's phase 1 vertical layout is done in unbounded space. That means:
no vertical constraint → no height limit
any widget with infinite height will throw the above error
you can't render an infinite height object in an infinite height constraint... that's goes on forever
Phase 2
after Phase 1 widgets have taken as much space as they intrinsically need, phase 2 Flex items share the remaining/leftover space
the remaining space is calculated from incoming constraints minus Phase 1 widgets dimensions
double.infinity height will expand to use up the remaining space
Infinite Height is OK
Here's an example of using infinite height on a Container inside a Column, which is fine:
class ColumnInfiniteChildPage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Column(
children: [
Flexible(
child: Container(
height: double.infinity, // ← perfectly fine
child: Text('Column > Container > Text')),
),
Text('Column > Text')
],
),
),
);
}
}
Remove the Flexible and the error will be thrown.