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In this screen on top I have button and a text, in second I have a list view.
I want to reduce the gap between first and second layout.
This is the image in which I marked red. That red marked space I want to reduce
I am calling widget's body Column like below.
Widget body = new Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
toplayout,
listScreen,
startButtonlayout
],
);
First layout as below
Widget toplayout = new Container(
width: 70,
height: 70,
color: Colors.red,
child: new Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Builder(builder: (context) => IconButton(
icon: Icon(Icons.arrow_back),
iconSize: 30,
onPressed: () {
// Here i want context
if (Navigator.canPop(context)) {
Navigator.pop(context);
} else {
SystemNavigator.pop();
}
},
),),
new Container(
margin: const EdgeInsets.fromLTRB(20, 0, 0, 0),
child: new Text("Day 1",
style: new TextStyle(
fontSize: 30,
color: Colors.black,
)))
],
),
);
Widget listScreen = new Expanded(
child: new Container(
child: new ListViewExample(),
),
);
class ListViewExample extends StatefulWidget {
#override
State<StatefulWidget> createState() {
SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
statusBarColor: Colors.transparent,
));
SystemChrome.setEnabledSystemUIOverlays(
[SystemUiOverlay.top, SystemUiOverlay.bottom]);
// TODO: implement createState
return ExerciseListPage();
}
}
This is the list
List<GestureDetector> _buildListItemsfromFlower() {
return flowers.map((flowers) {
var flatbutton = GestureDetector(
child: Card(
elevation: 10.0,
child: new Row(
textBaseline: TextBaseline.alphabetic,
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
new Container(
child: new Column(
children: <Widget>[
new Container(
width: MediaQuery.of(context).size.width * 0.5,
height: MediaQuery.of(context).size.height / 15,)))
As it is taking more gap between the widgets in column i want to reduce it. I have not mentioned any margins.
I have a Row widget on the bottom of the page that I can't center. I've tried all the mainAxisAlignment's and crossAxisAlignment's there are, as well as wrapping it in an Align widget and setting alignment to alignment.center and it's still on the left edge of the page. I've tried everything and am really stuck. Any help would be appreciated.
The Page (Updated)
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.lightBlue,
centerTitle: true,
elevation: 5,
title: Text("Pathomatic")),
body: Container(
decoration: new BoxDecoration(color: Colors.black),
child: SafeArea(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Expanded(
flex: 2,
child: new Stack(
children: <Widget>[
new Container(
alignment: Alignment.center,
child: _cameraPreviewWidget(context),
),
new Align(
alignment: Alignment.center,
child: GestureDetector(
child: Stack(children: <Widget>[
Positioned(
top: yPosition,
left: xPosition,
child: Container(
// padding: EdgeInsets.only(top: 200.0, left: 20.0),
height: MediaQuery.of(context).size.height / 3,
width: MediaQuery.of(context).size.width / 3,
child:
Image.asset('assets/images/crosshair.png'),
),
),
]),
onPanUpdate: (tapInfo) {
setState(() {
xPosition += tapInfo.delta.dx;
yPosition += tapInfo.delta.dy;
});
}),
),
],
),
),
SizedBox(height: 5),
Row(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.center,
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
_cameraTogglesRowWidget(),
_mlTextWidget(),
],
),
_captureControlRowWidget(context),
//SizedBox(width: 50),
],
),
SizedBox(height: 5),
],
),
),
),
);
}
This is usually because the widget you are trying to center is actually stretching its container. Since it's the size of the screen, it's contents stick to the left. You should use the Flutter Inspector with select widget mode to actually see how large your row is. Then everything will make much more sense.
In your code, your Row is stretching. Try
Row(mainAxisSize: MainAxisSize.min
This should make it not grow. Alternatively, you can keep the row large but make it center its children:
Row(mainAxisAlignment: MainAxisAlignment.Center
Of course, with this approach its children will get close to each other in the center. You can use a SizedBox between them, or use some other way of spacing them apart.
I am making layout for flutter application
What I want to do is
-----------------------
|[i] [text] |
| |
Icon should be the left (padding 5px)
And text should be the center of screen.
At first I should use the Column
However my layout is not the same proportion
It might be simple though , how can I make it??
Stack() is one of the many options that you can use. Something like this:
Stack(
children:<Widget>[
Padding(
padding: EdgeInsets.only(left: 5),
child: Icon(Icons.info),
),
Align(
alignment: Alignment.topCenter,
child: Text("I'm on the top and centered."),
),
],
),
One way you can do this is something like this..
Widget build(BuildContext context) {
return Column(
children: [
Padding(
padding: EdgeInsets.all(5),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Icon(Icons.info),
Text('text'),
Opacity(opacity: 0, child: Icon(Icons.info)),
],
),
),
Padding(
padding: EdgeInsets.all(5),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Icon(Icons.info),
Text('second text'),
Opacity(opacity: 0, child: Icon(Icons.info)),
],
),
),
],
);
}
Result:
I might be late, but I want this answer to be there, if some one would find it better for the development purposes in future time.
We can make a reusable widget, which we can use it inside the main widget. The widget will accept text, and icon to be passed when called
// IconData is the data type for the icons
Widget myWidget(String text, IconData icon) => Row(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.start,
children: [
// this will be used a left-padding param
SizedBox(width: 20.0),
// using it here
Icon(icon, size: 28.0, color: Colors.greenAccent),
SizedBox(width: 5.0),
// this will take the remaining space, and then center the child
Expanded(child: Center(child: Text(text)))
]
);
To use in the main Widget, just do like this:
Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
// calling our widget here
myWidget('FirstText', Icons.alarm),
SizedBox(height: 20.0), // this is used as a top margin
myWidget('SecondText', Icons.notifications)
]
)
If you wanna check out the sources which I used, please see:
Expanded class
SizedBox class
The result you will get is this:
This was an answer I gave a while ago for this same issue, but the other situation was vertical (a Column) instead of horizontal (a Row). Just swap the Row and Columns out for a Column and Rows in this example and you'll get the idea.
My code has grey added in order to show the difference between the two approaches.
A Stack will work, but it's overkill for this, this kind of problem is part of why we have Expandeds and Flexibles. The trick is to use three Flexibles (2 Expandeds and a Spacer). Put the Spacer on top. It and the bottom Expanded must have the same flex value in order to center the middle Expanded.
import 'package:flutter/material.dart';
class CenteringOneItemWithAnotherItemInTheColumn extends StatelessWidget {
const CenteringOneItemWithAnotherItemInTheColumn({
Key key,
}) : super(
key: key,
);
/// Adjust these values as needed
final int sameFlexValueTopAndBottom = 40; // 40%
final int middleFlexValue = 20; // 20%
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Column Alignment Question'),
),
body: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Spacer(),
const Text(
'Cent',
style: TextStyle(
fontSize: 64,
),
),
const Spacer(),
const Text(
'Bot',
style: TextStyle(
fontSize: 64,
),
),
],
),
Column(
children: <Widget>[
/// The key is to have the Spacer and the bottom Expanded
/// use the same value for flex. That will cause the middle
/// child of the Column to be centered vertically.
Expanded(
flex: sameFlexValueTopAndBottom,
child: Container(
width: 100,
color: Colors.grey[300],
),
),
Expanded(
flex: middleFlexValue,
child: const Align(
alignment: Alignment.center,
child: Text(
'Cent',
style: TextStyle(
fontSize: 64,
),
),
),
),
Expanded(
flex: sameFlexValueTopAndBottom,
child: Container(
color: Colors.grey[300],
child: const Align(
alignment: Alignment.bottomCenter,
child: Text(
'Bot',
style: TextStyle(
fontSize: 64,
),
),
),
),
),
],
),
],
),
);
}
}
I'm re-writing a simple app which calculates averages. However, I have a hard time with a TextField. I would like it to be exactly as on a first screenshot.
The TextField's width is stretched, I don't want that. I want it to be exactly as it is on the screenshot.
Desired look:
What I have:
Code:
import 'package:flutter/material.dart';
import 'package:easy_localization/easy_localization.dart';
class ArithmeticAverageScreen extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('arithmetic_average_title').tr(),
),
body: Container(
padding: EdgeInsets.all(16.0),
child: Column(
children: <Widget>[
Card(
child: Container(
padding: EdgeInsets.symmetric(vertical: 20.0),
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
ListTile(
leading: Icon(Icons.help),
title: Text('arithmetic_average_help').tr(),
subtitle: Text('arithmetic_average_help_content').tr(),
)
],
),
)
),
SizedBox(height: 16.0),
Card(
child: Container(
padding: EdgeInsets.symmetric(vertical: 20.0, horizontal: 20.0),
child: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
Text('arithmetic_average_your_grades', style: Theme.of(context).textTheme.headline5).tr(),
SizedBox(height: 16.0),
Text('arithmetic_average_grades_one_at_a_time', style: Theme.of(context).textTheme.headline6,).tr(),
SizedBox(height: 16.0),
Text('arithmetic_average_grade', style: Theme.of(context).textTheme.subtitle2).tr(),
TextField()
],
),
),
)
],
),
)
);
}
}
This will help you make generic width on all devices, so here width * 0.3 means it will take 30% of the screen width
Container(
width: MediaQuery.of(context).size.width * 0.3,
child: TextField(),
)
Use Row Widget, and put Expanded Widget as child Widget and inside that put your widgets, as Expanded will take up equal space.
return Row(
children: [
Expanded(
child: TextField();
),
Expanded(
child: Button();
)
],
);
When ever you want to play with height and width you can use the widget Container.If you want to play with a property which cannot found in the widget you are using wrap it with a widget with that property will help you.
Container(
margin: const EdgeInsets.only(right: 150),
child: new TextField(
decoration: new InputDecoration(
hintText: 'Grade',
)
)
)
You can try to wrap your TextField and Button with two Flexible widgets and apply desired proportions, e.g. 1:2 which would give you following result:
Row(
children: [
Flexible(
flex: 1,
child: TextField(),
),
Flexible(
flex: 2,
child: RaisedButton(
child: Text('Hello'), onPressed: () {}),
)
],
)
],
You can also replace the first Flexible with SizedBox and set an exact value, e.g:
Row(
children: [
SizedBox(
width: 100.0,
child: TextField(),
),
Flexible(
flex: 2,
child: RaisedButton(
child: Text('Hello'), onPressed: () {}),
)
],
)
],
TextField doesn't have an intrinsic size (width) constraint so it will always try to occupy all horizontal space. Flexible allows to constraint it to desired width in a Row.
Full example on DartPad.
I'm new to Flutter and I'm attempting to create a Card that has a bottom row and a center Icon or Text. I'm sure this is pretty easy, but I'm struggling . I'm not sure of the best way to do this. Should I create a column with two nested columns?
import 'package:flutter/material.dart';
class Test extends StatelessWidget {
#override
Widget build(BuildContext context) {
return SafeArea(
child: Card(
elevation: 5,
margin: EdgeInsets.fromLTRB(16, 16, 16, 0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Icon(
Icons.ac_unit,
color: Colors.blue,
),
Row(
children: <Widget>[
Expanded(
child: Container(
height: 50,
color: Colors.blue,
),
)
],
)
],
),
),
);
}
}
Try out this code.
Column(
children: <Widget>[
Expanded(
child: Center(
child: Text('\$250'),
),
),
Text('\$ Total'),
],
)
I'm using Expanded to use entire space of container (Column) which will push text to the bottom. And using Center to put a widget (Text in this code) in the middle of the container.