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I am using Flutter 2.8, as many package dont yet have support for latest flutter version.
I am using stack instead of appBar. and I want to get the look as of below picture.
I dont want to use stack in the whole page, i think it will cause performance issues. Also, If i use stack only in lieu of appBar, I can copy paste this code to make that home button on top-left corner, for another app.
here is my full code of this page:
import 'package:flutter/material.dart';
class HomePage extends StatelessWidget {
const HomePage({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return SafeArea(
child : Scaffold(
//todo: 1. copy code from getx4 cool ui app
//todo: 1. make it as he made it
body: Column(
children: [
Expanded(
flex: 1,
child: Container(
color: Color(0xFFc5e5f3),
child: Stack(
children: [
Positioned(
top: 10,
left: 5,
child: IconButton(
onPressed: () {},
icon: Icon(Icons.home),
)),
],
),
),
),
Expanded(
flex: 10,
child: Padding(
padding: const EdgeInsets.all(15.0),
child: Row(
children: [
Expanded(child: Text('ShopX', style: TextStyle(fontSize: 30, fontWeight: FontWeight.bold) ,)),
Padding(
padding: const EdgeInsets.only(right: 8) ,
child: Icon(Icons.format_list_bulleted ),
),
Icon(Icons.grid_view_outlined ),
],
),
),
),
],
),
),
);
}
}
You need to use Align widget with a property like alignment: FractionalOffset.topCenter . Please see the sample code below:
Stack(
fit: StackFit.expand,
children: <Widget>[
Column(
children: [
Container(
padding: EdgeInsets.only(top: 8.0, bottom: 8.0),
color: Colors.black,
child: Image(image: AssetImage('assets/image.png'), width: MediaQuery.of(context).size.width, height: 50,)),
Expanded(
flex: 1,
child: Align(
alignment: FractionalOffset.topCenter,
child: Container(
decoration: BoxDecoration(
color: Colors.white,
),
child: Padding(
padding: const EdgeInsets.fromLTRB(35, 12, 0, 12),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: const [
Image(image: AssetImage('assets/image.png'), width: 120, alignment: Alignment.bottomLeft,),
Image(image: AssetImage('assets/image.png'), width: 100, alignment: Alignment.bottomLeft,),
Image(image: AssetImage('assets/image.png'), width: 100, height: 40, alignment: Alignment.bottomLeft,),
],
),
),),),
),
],
),
],
),
This sample code adds images 4 images on top center of the screen.
1 image on the top of the screen
3 images below the top image
Moreover, you can directly put your Stack widget into the body of Scaffold.
Use crossAxisAlignment: CrossAxisAlignment.start, on Row. Default is center.
Expanded(
flex: 10,
child: Padding(
padding: const EdgeInsets.all(15.0),
child: Row(
crossAxisAlignment: CrossAxisAlignment.start, //this
children: [
Expanded(
child: Text(
'ShopX',
style:
TextStyle(fontSize: 30, fontWeight: FontWeight.bold),
)),
I'm having issues with the layout because of the long text, I've tried using Expanded / Flexible with the text that is causing the issue to fill the space it needs but it's overflowing. I know the question is asked hundred times, but I don't understand where is the mistake. I tried applying to both Expanded / Flexible to all of the Row/Columns individually and too all at the same time (mostly I was trying out layouts to try to fix it), and I still have the issue... I even tried to use the FittedBox with fit: BoxFit.(all of them).
Container(
alignment: Alignment.centerLeft,
child: Column(
children: [
Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding: const EdgeInsets.only(right: 8.0),
child: Icon(Icons.directions_car),
),
Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text("Text 1"),
SizedBox(
height: 4,
),
Text('TEXT 2'),
],
),
SizedBox(
width: 27,
),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('1 World Way, Los Angeles, CA 90045, USA',
textAlign: TextAlign.left,
),
SizedBox(
height: 4,
),
Text('FLIGHT 3231'),
],
),
],
),
],
),
],
),
);
By my understanding, and do correct me if I'm wrong, applying Expanded / Flexible, Flexible takes only the needed space, and Expanded takes all available space, respecting the flex factor. So most of the time I use the Flexible widget, but this time it is not working.
Thanks in advance for the help!
Try using Expanded widget with flex value set as per the expectation of UI filling.
Sample Code:
Center(
child: Container(
height: 80,
color: Colors.yellow,
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Padding(
padding: const EdgeInsets.all(8.0),
child: Icon(Icons.bus_alert),
),
Expanded(
flex: 1,
child: Container(
width: 1,
color: Colors.green,
child: Column(
children: [Text("Text 1"), Text("Text 1")],
),
)),
Expanded(
flex: 3,
child: Container(
color: Colors.blue,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
Text("1 World Way, Los Angeles, CA 90045, USA"),
Text("FLIGHT 3231"),
],
),
))
],
),
))
Note: There is a limitation for the text content using. We need to make sure to set the height according to the expected text length.
You can use Flexible or Expanded Widget You should try to below code :
Card(
shape: RoundedRectangleBorder(
side: BorderSide(
color: Colors.blue,
),
borderRadius: BorderRadius.circular(15.0),
),
margin: EdgeInsets.all(16.0),
child: Container(
padding: EdgeInsets.all(8.0),
alignment: Alignment.centerLeft,
child: Column(
children: [
Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Icon(Icons.directions_car),
SizedBox(
width: 10,
),
Flexible(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text("Text 1"),
SizedBox(
height: 4,
),
Text('TEXT 2'),
],
),
),
SizedBox(
width: 27,
),
Flexible(
child: Container(
child: Column(
children: [
Text(
'1 World Way, Los Angeles, CA 90045, USA',
textAlign: TextAlign.left,
),
SizedBox(
height: 4,
),
Text(
'FLIGHT 3231',
textAlign: TextAlign.left,
),
],
),
),
),
],
),
],
),
),
),
Your screen like this :
wrap it by a container with fixed width and then use auto_sized_text. Or you can wrap your Text widget by FittedBox by fixed width. it would do the same approach. Feel free to add maxLine, minFontSize and maxFontSize' in auto_sized_text. Using ExpandedorFlexible` only affects the size of the container when your text length is lower than the given width, and It does not help you in this situation.
If the text is really long, then using Expanded will wrap the text according to the parent widget, thus leading to change in the font size. You might consider using ellipsis.
return Container(
width:300 //give a width of your choice
child: Text('Any long text',
overflow:TextOverflow.ellipsis,
),
);
I'm getting the problem when I add Scrolling functionality in Scaffold, here I have tried SingleChildScrollView, CustomerScrollView, and ListView but it freezes the UI but when I replaced ti Scaffold to LayoutBuilder it works but all the background my UI got black.
I just want to add scrolling functionally to Scaffold.
Widget build(BuildContext context) {
return WillPopScope(
onWillPop: () {
...Some Code...
},
child: Scaffold(
body: Column(
children: <Widget>[
Expanded(
flex: 3,
child: Container(
padding: EdgeInsets.all(15.0),
alignment: Alignment.bottomLeft,
child: Text(
mydata[0][i.toString()],
style: TextStyle(fontSize: 16.0, fontFamily: "Quando"),
),
)),
Expanded(
flex: 6,
child: Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
choiceButton('a'),
choiceButton('b'),
choiceButton('c'),
choiceButton('d'),
],
),
)),
Expanded(
flex: 1,
child: Container(
alignment: Alignment.topCenter,
child: Text(showtimer,
style: TextStyle(
fontSize: 35.0,
fontFamily: "Times New Roman",
fontWeight: FontWeight.w700)),
))
],
),
) // Scaffold
);// WillPopScope
}
Try This
return Scaffold(
resizeToAvoidBottomInset: false,
extendBodyBehindAppBar: false,
backgroundColor: Colors.white,
body: Column(
children: <Widget>[
Expanded(
child: SingleChildScrollView(
child: Container(
height: MediaQuery.of(context).size.height,
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
],
),
),
),
),
]
Don't use Expanded inside any scrolling container unless you wrap it in a fixed bound on its main axis.
Like in your case main axis is vertical and you are using expanded in it, since expanded needs a bound to limit its expansion, you should've remove that expanded thing or just wrap the container in a SizedBox for a specific height.
Than you can wrap the sized box in any scroll container which suits you.
Hope it helps!
In your code, change Column to ListView, and remove the expanded widget. you can use fixed height or MediaQuery.of(context).size.height * (any ratio) to the containers, or just don't specify any container height so it'll take its children's height.
here's the code will look like:
body: ListView(
shrinkWrap: true,
children: <Widget>[
Container(
// height: MediaQuery.of(context).size.height * (any ratio) / fixed height
child: Text(
mydata[0][i.toString()],
style: TextStyle(fontSize: 16.0, fontFamily: "Quando"),
),
),
Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
choiceButton('a'),
choiceButton('b'),
choiceButton('c'),
choiceButton('d'),
],
),
),
Container(
alignment: Alignment.topCenter,
child: Text(showtimer,
style: TextStyle(
fontSize: 35.0,
fontFamily: "Times New Roman",
fontWeight: FontWeight.w700)),
)
],
),
I've been toying with lists in flutter, and everything is fine. I'm starting to understand the logic of the whole thing.
Now I wanted to do a simple layout like that :
My problem is that I can't find a way to make the first row. I tried to tell Row to let its two children take half and no less no more, but I didn't really find a way. (The inside thing will eventually be buttons.)I tried several things to no avail. Here is the layout I started from :
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Column(children: <Widget>[
Padding(
padding: EdgeInsets.only(top: 50.0),
),
Row(
children: <Widget>[
Padding(
padding: EdgeInsets.only(
top: buttonPaddingTop,
left: buttonPaddingSide,
right: buttonPaddingSide),
child: ButtonTheme(
child: FlatButton(
onPressed: () {},
color: Colors.grey,
child: const Text('LARGE TEXT',
overflow: TextOverflow.ellipsis,
style: TextStyle(fontSize: buttonFontSize)),
),
),
),
Padding(
padding: EdgeInsets.only(
top: buttonPaddingTop,
left: buttonPaddingSide,
right: buttonPaddingSide),
child: ButtonTheme(
child: FlatButton(
onPressed: () {},
color: Colors.grey,
child: const Text('LARGE TEXT',
overflow: TextOverflow.ellipsis,
style: TextStyle(fontSize: buttonFontSize)),
),
),
),
],
),
]),
),
);
}
Should I continue trying like this, or should I try another object than Row to arrange the layout ?
Expanded takes as much space as available in this case horizontally. That means if you would use 2 Expanded widgets inside your Row, the space will be divided by half.
Try this:
Column(
children: <Widget>[
Row(
children: <Widget>[
Expanded(
child: Text('first half'),
),
Expanded(
child: Text('second half'),
),
],
),
Row(
children: <Widget>[
Expanded(
child: Text('first half'),
),
Expanded(
child: Text('second half'),
),
],
),
Row(
children: <Widget>[
Expanded(
child: Text('full width'),
)
],
),
],
)
Make sure you read more about Flutter widgets, for example watch this video (and other ones in this series):
https://www.youtube.com/watch?v=_rnZaagadyo
I'm trying to bottom-center a widget at the bottom of a Column, but it keeps aligning to the left.
return new Column(
new Stack(
new Positioned(
bottom: 0.0,
new Center(
new Container(),
),
),
),
);
The existence of the Positioned forces the Container to the left, instead of centering. Removing the Positioned, however, puts the Container in the middle-center.
Align is the way to go if you have only one child.
If you have more, consider doing something like this:
return new Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
// Your elements here
],
);
The easiest and the correct way to do it - use Spacer()
Example:
Column(
children: [
SomeWidgetOnTheTop(),
Spacer(),
SomeCenterredBottomWidget(),
],
);
Expanded(
child: Align(
alignment: FractionalOffset.bottomCenter,
child: Padding(
padding: EdgeInsets.only(bottom: 10.0),
child: //Your widget here,
),
),
),
I have used this approach,
What i want is, A layout always in bottom but whenever Keyboard pops-up that layout also comes over it
body: Container(
color: Colors.amber,
height: double.maxFinite,
child: new Stack(
//alignment:new Alignment(x, y)
children: <Widget>[
new Positioned(
child: myWidget(context, data.iconName, Colors.red),
),
new Positioned(
child: new Align(
alignment: FractionalOffset.bottomCenter,
child: myWidget(context, data.iconName, Colors.green)
),
)
],
),
),
1) You can use an Align widget, with FractionalOffset.bottomCenter.
2) You can also set left: 0.0 and right: 0.0 in the Positioned.
Just expanding the answers:
Spacer is an option no one mentioned yet; it is used in case you prefer not to use Positioned / Align.
Align works if you want to specify the alignment of a child inside a parent. Use it anywhere but directly inside Stack
Positioned is similar to Align, but works only under Stack directly.
Design everything using Expanded() is one of the easiest way to do this
Column(
children: [
Expanded(
child: Placeholder(),
flex: 1,
),
Expanded(
child: Placeholder(),
flex: 10,
),
Expanded(
flex: 2,
child: Placeholder(),
)
],
),
If you wish to leave content as it, can wrap it with scrollable.
Useful if you have inputs in the children:
return Stack(
children: <Widget>[
Positioned(
child: SingleChildScrollView(
child: Column(
children: children
..add(Container(
height: 56, // button heigh, so could scroll underlapping area
)))),
),
Positioned(
child: Align(
alignment: Alignment.bottomCenter,
child: button,
),
)
],
);
Widget _bottom() {
return Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
Expanded(
child: Container(
color: Colors.amberAccent,
width: double.infinity,
child: SingleChildScrollView(
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: new List<int>.generate(50, (index) => index + 1)
.map((item) {
return Text(
item.toString(),
style: TextStyle(fontSize: 20),
);
}).toList(),
),
),
),
),
Container(
color: Colors.blue,
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
'BoTToM',
textAlign: TextAlign.center,
style: TextStyle(fontSize: 33),
),
],
),
),
],
);
}
Wrap your Container in SingleChildScrollView() widget. Then it will not come above when keyboard pops up.
In addition of Stack:
to avoid floating container on keyboard, use this
return Scaffold(
appBar: getAppBar(title),
resizeToAvoidBottomInset: false,
body: