Develop Reference

SinglePageScrollView is not working in flutter

I am learning flutter right now and my SinglePageScrollView is not working, Please help me out, I am trying to solve it since 10 hours, I am just brewww right now.
This is my code btw
SingleChildScrollView(
child: Container(
child: Column(
children: [
Column(
children: [
Column(
children: [
Container(
width: MediaQuery.of(context).size.width,
child: Image.asset("assets/images/img.jpg"),
),
Container(
margin: const EdgeInsets.only(top: 5),
alignment: Alignment.center,
width: MediaQuery.of(context).size.width,
child: const Text(
"Hii, This is what i probably uploaded",
style: TextStyle(
fontSize: 20,
fontWeight: FontWeight.bold,
),
),
),
Divider(color: Colors.black)
],
)
],
),
Column(
children: [
Column(
children: [
Container(
width: MediaQuery.of(context).size.width,
child: Image.asset("assets/images/img.jpg"),
),
Container(
margin: const EdgeInsets.only(top: 5),
alignment: Alignment.center,
width: MediaQuery.of(context).size.width,
child: const Text(
"Hii, This is what i probably uploaded",
style: TextStyle(
fontSize: 20,
fontWeight: FontWeight.bold,
),
),
),
Divider(color: Colors.black)
],
)
],
),
],
),
),
)
Btw, SingleChildScrollView is the child of Row widget

Your code is working perfectly, it has only one small mistake,
SingleChildScrollview always need some height means in how much area we want scroll our child widgets.
You’ve 2 widgets in your Column
Row
SingleChildScrollview
You want to scroll your child widgets in Column except Row area, so wrap it within Expanded
Expanded(
child: SingleChildScrollView(
….

Row must have children or you have an unclosed parenthesis in the container.
return Scaffold(
appBar: AppBar(),
body: Column(
children: [
Row(
children: [
SingleChildScrollView(
child: Container(),
)
],
)
],
),
);
return Scaffold(
appBar: AppBar(),
body: Column(
children: [
Row(),
SingleChildScrollView(
child: Container(),
),
],
),
);

I am trying to wrap my Column widget in a SingleChildScrollView but not able to

I am trying to wrap my column widget in a single child scroll view since I am getting overflow. But when I am trying to wrap it, I am receiving errors such as
RenderFlex children have non-zero flex but incoming height constraints are unbounded.
RenderBox was not laid out: RenderFlex#dc736 relayoutBoundary=up12 NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
'package:flutter/src/rendering/box.dart':
Failed assertion: line 1930 pos 12: 'hasSize'
What can I do to prevent overflow of pixels in my app ? Here is my code:
return Scaffold(
appBar: AppBar(
title: Text('Edit your pet`s details'),
backgroundColor: Color.fromRGBO(101, 69, 112, 1.0),
),
body: Container(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
children: <Widget> [
Row(
children: <Widget>[
Expanded(
child: TextFieldWidget(
controller: _petNameController,
helperText: "Pet's Name",
)),
],
),
Padding(
padding: const EdgeInsets.only(left: 50.0, right: 50.0),
child: Divider(
color: Colors.grey,
thickness: 0.5,
),
),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
SizedBox(height: 60.0,),
Text(
"$_petName is a $_petGender. Update gender",
style: TextStyle(
fontSize: 20.0,
fontWeight: FontWeight.w400,
),
)
],
),
Expanded(
child: GridView.count(
crossAxisCount: 2,
primary: false,
scrollDirection: Axis.vertical,
children: List.generate(petGenders.length, (index) {
return GestureDetector(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Card(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(12.0)),
color:
selectedIndex == index ? primaryColor : null,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
petGenders[petKeys[index]],
SizedBox(
height: 15.0,
),
Text(
petKeys[index],
style: TextStyle(
color: selectedIndex == index
? Colors.white
: null,
fontSize: 18.0,
fontWeight: FontWeight.w600),
),
],
),
),
),
onTap: () {
setState(() {
widget.pet.gender = petKeys[index];
selectedIndex = index;
});
});
}),
),
),

The error comes from the fact that your Column contains an Extended widget, which forces to use the maximum vertical space.
The SingleScrollChildView has no limit to vertical space it can use.
The result is that you have a widget that try to take an infinite vertical space.
How can you fix that ?
Either, remove the Extended widget, or the SingleScrollChildView widget.
Or, you can also wrap your Extended widget with another widget with a defined size or constraints like a Container with the properties height and width.

How to vertically expand container widget in flutter

trying to expand Expanded or Container vertically to match its height with Row widget height, here is my code
#override
Widget build(BuildContext context) {
return InkWell(
onTap: ()=> onDepartClicked(),
child: Container(
padding: EdgeInsets.all(16),
child: Card(
child: Row(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Expanded(
flex: 8,
child: Padding(
padding: EdgeInsets.all(16),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(department.name,
overflow: TextOverflow.visible,
style: TextStyle(fontSize: 20),
),
Container(
margin: EdgeInsets.only(top: 8),
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Image.asset("assets/images/feedback.png", width: 20, height: 20,),
SizedBox(width: 4,),
Text(department.phone),
SizedBox(width: 16,),
Image.asset("assets/images/feedback.png", width: 20, height: 20,),
SizedBox(width: 4,),
Text(department.type),
],
),
),
Container(margin: EdgeInsets.symmetric(vertical: 8),child: Divider(height: 0.3, color: Colors.grey,)),
Container(
child: Text(department.description,
maxLines: 3,
style: TextStyle(fontSize: 13),
),
)
],
),
),
),
Container(
width: 40,
decoration: BoxDecoration(
color: Colors.blue,
borderRadius: BorderRadius.only(topRight: Radius.circular(4), bottomRight: Radius.circular(4))
),
child: Column(
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Image.asset("assets/images/feedback.png",
width: 20,
height: 20,
fit: BoxFit.scaleDown,
),
],
),
),
],
),
),
),
);
}
I want to expand this block in the above code (second child of the Row):
Container(
width: 40,
decoration: BoxDecoration(
color: Colors.blue,
borderRadius: BorderRadius.only(topRight: Radius.circular(4), bottomRight: Radius.circular(4))
),
child: Column(
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Image.asset("assets/images/feedback.png",
width: 20,
height: 20,
fit: BoxFit.scaleDown,
),
],
),
),
I want to achieve this view with blue area expanded vertically in parent

Edit after more clarification on the question:
The idea behind the code below is like the This Image.
Left child of the row contains a column, the column has 3 children.
The first child of the column is the title, second one is a Row of phone and type and the last one is the description.
For "phone" and "type" you can use ListTile but you should put them on something like Flexible or define size for them.
I deinded a Listview and put 10 card inside it.
Here is the code:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
const MyApp({Key key}) : super(key: key);
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: ListView.builder(
padding: EdgeInsets.all(16.0),
itemBuilder: (BuildContext context, int index) {
return _card();
},
shrinkWrap: true,
itemCount: 10,
),
),
);
}
Widget _card() {
return Card(
child: Padding(
padding: EdgeInsets.all(8.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Flexible(
fit: FlexFit.tight,
flex: 5,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
'UBIT',
overflow: TextOverflow.visible,
style: TextStyle(fontSize: 20),
),
Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Icon(Icons.message),
SizedBox(width: 4),
Text('+09210000000'),
SizedBox(width: 16),
Icon(Icons.message),
SizedBox(width: 4),
Text('Science'),
],
),
Divider(),
Text(
'Lorem Ipsum ist ein einfacher Demo-Text für ' +
'die Print- und Schriftindustrie. Lorem Ipsum ' +
'ist in der Industrie bereits der Standard Demo-Text' +
' seit 1500',
textAlign: TextAlign.justify,
),
],
),
),
Padding(
padding: EdgeInsets.only(left: 8.0),
child: Icon(
Icons.message,
size: 30.0,
),
),
],
),
),
);
}
}

Wrap the Container in a SizedBox with height:double.infinity to make it take all the available space, in your case the height of the row.
Expanded(
child: SizedBox(
height:double.infinity,
child:Container(
decoration: BoxDecoration(
color: Colors.blue,
borderRadius: BorderRadius.only(topRight: Radius.circular(4), bottomRight: Radius.circular(4))
),
child: Image.asset("assets/images/feedback.png", width: 20, height: 20, fit: BoxFit.scaleDown,),
),
),
)

TextOverflow in Row which is inside a Column in Flutter

I'm trying to develop a Card with some text widget beneath it. Look at the image below.
The problem I'm facing is when the text next to location icon is large, it overflows. I've tried with Flex, but it throws an exception. There's also a star icon at the right bottom of the card.
Here's what I want :
I want the text to be single line ending with .. if it's too long.
star should be placed at the bottom right
The location icon doesn't consider the left padding I gave (Padding widget)
Please help! Thanks in advance.
Here's my code :
Scaffold buildOffersList(OfferModel offerModel) {
return Scaffold(
body: Stack(
children: <Widget>[
Center(
child: Image.network(
'https://b.zmtcdn.com/data/pictures/2/19250332/0fe23bee17b60d181fd43421ca3480d4_featured_v2.jpg',
fit: BoxFit.cover,
width: size.width,
height: size.height,
color: Colors.black.withOpacity(.6),
colorBlendMode: BlendMode.darken
),
),
Column(
children: <Widget>[
Container(
child: PageHeader(pageTitle: 'Popular Offers', numberOfOffers: '20 venues', sortByText: 'Sort By: Location', filterText: 'Filter'),
),
Expanded(
child: GridView.count(
crossAxisCount: 2,
mainAxisSpacing: 5.0,
crossAxisSpacing: 5.0,
padding: const EdgeInsets.only(left: 10.0, right: 10.0),
children: List.generate(offerModel.payload.offers.length, (index) {
return Center(
child: offerCard3(offerModel.payload.offers[index]),
);
}),
),
),
],
),
],
)
);
}
Widget offerCard3(Offer offer) {
return GestureDetector(
child: Card(
elevation: 1.0,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(0.0),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
AspectRatio(
aspectRatio: 18.0 / 8.0,
child: Image.network(
"https://b.zmtcdn.com/data/pictures/2/19250332/0fe23bee17b60d181fd43421ca3480d4_featured_v2.jpg",
fit: BoxFit.cover,
),
),
Padding(
padding: EdgeInsets.fromLTRB(7.0, 5.0, 4.0, 5.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
getBrandName(offer),
getOfferTitle(offer),
SizedBox(height: 15.0),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
mainAxisSize: MainAxisSize.max,
children: <Widget>[
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
getLocationIcon(),
getOfferContactAddressView(offer),
],
),
getKmText(),
],
),
//Spacer(),
getStarIcon(),
],
),
],
),
),
],
),
),
);
}
Text getOfferContactAddressView(Offer offer) {
return Text(
offer.offerContactAddress,
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: TextStyle(
color: Colors.black38,
fontSize: 9.0,
),
);
}
Icon getStarIcon() {
return Icon(
Icons.star,
color: Colors.orange,
size: 25,
);
}

There is a flutter package for auto resize text to contain the full text.
auto_size_text 2.1.0 here

FIrst Solution Highly Recommend
First of all, you can use Listtile.
ListTile(title: Text("ListTile"),
subtitle: Text("Sample Subtitle. \nSubtitle line 3"),
trailing: Icon(Icons.home),
leading: Icon(Icons.add_box),
isThreeLine: true,
)
Second Solution
SizedBox(
width: 500,
child: new Text(
'Text largeeeeeeeeeeeeeeeeeeeeeee',
//Overflow: TextOverflow.ellipsis will make you large text end with ....
overflow: TextOverflow.ellipsis,
style: new TextStyle(
fontSize: 13.0,
),
),
),

I think you have to use like below code:-
Expanded(
child: Wrap(
direction: Axis.horizontal,
runAlignment: WrapAlignment.start,
children: <Widget>[
getOfferContactAddressView(offer),
],
),
flex: 1,
),

It happens because the Text Widget doesn't know how big the width of the Row.
Please try this code out DartPad to help you find where you went wrong with your code. I still believe, wrapping the Text Widget with Expanded and give overflow property will give what you want right away.
Here's the SS of it:

Flutter - How to make a column screen scrollable

I'm building a flutter app with a Login Screen. On focus on the text field(s), the screen is overflowed and i cannot scroll. I've tried using a ListView.builder, but that just gives a renderBox error, and the regular ListView doesn't work
The widget structure is like this
-scafold
- body
- container
- column
- form
- column
- textInput
- textInput
- container
- container
- row
- raisedButton
Thank You in advance !!

The ListView solution should work, but at the time of writing, it suffers from the crash listed here. Another way to achieve the same thing without this crash is to use a SingleChildScrollView:
return new Container(
child: new SingleChildScrollView(
child: new Column(
children: <Widget>[
_showChild1(),
_showChild2(),
...
_showChildN()
]
)
)
);

try this Code: Its Using ListView
class Home extends StatelessWidget {
#override
Widget build(BuildContext context) {
// TODO: implement build
return Scaffold(
body: Center(
child: ListView(
shrinkWrap: true,
padding: EdgeInsets.all(15.0),
children: <Widget>[
Center(
child: Card(
elevation: 8.0,
child: Container(
padding: EdgeInsets.all(10.0),
child: Column(
children: <Widget>[
TextField(
decoration: InputDecoration(
prefixIcon: Icon(Icons.person),
labelText: "Username or Email",
),
),
SizedBox(
height: 15.0,
),
TextField(
decoration: InputDecoration(
prefixIcon: Icon(Icons.lock),
labelText: "Password",
),
),
SizedBox(
height: 15.0,
),
Material(
borderRadius: BorderRadius.circular(30.0),
//elevation: 5.0,
child: MaterialButton(
onPressed: () => {},
minWidth: 150.0,
height: 50.0,
color: Color(0xFF179CDF),
child: Text(
"LOGIN",
style: TextStyle(
fontSize: 16.0,
color: Colors.white,
),
),
),
)
],
),
),
),
),
SizedBox(
height: 25.0,
),
Row(
children: <Widget>[
Expanded(child: Text("Don't Have a Account?")),
Text("Sign Up",
style: TextStyle(
color: Colors.blue,
)),
],
),
],
),
),
bottomNavigationBar: Padding(
padding: EdgeInsets.all(10.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Expanded(
child: RaisedButton(
padding: EdgeInsets.all(15.0),
onPressed: () {},
color: Colors.white,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(
32.0,
),
side: BorderSide(color: Color(0xFF179CDF))),
child: Text(
"SKIP SIGN UP FOR NOW",
style:
TextStyle(fontSize: 18.0, color: Color(0xFF179CDF)),
),
)),
],
),
),
);
}
}

There are two easy ways of doing it.
Wrap your Column in a SingleChildScrollView
SingleChildScrollView(
child: Column(
children: [
Text('First'),
//... other children
Text('Last'),
],
),
)
Use ListView instead of Column.
ListView(
children: [
Text('First'),
//... other children
Text('Last'),
],
)
This approach is simple to use, but you lose features like crossAxisAlignment and other benefits provided by Column, in that case, you can wrap your children widget inside Align and set alignment property.
Now you may have nested children which are further scrollable, in that case, you need to provide a fixed height to your children, you may use SizedBox for that, that's it.
For example:
ListView(
children: [
Text('First'),
SizedBox(
height: 100,
child: ListView(...), // nested ScrollView
),
Text('Last'),
],
)

We can use the Expanded widget. It will add scrolling.
return new Expanded(
child: new SingleChildScrollView(
child: new Column(
children: <Widget>[
_showChild1(),
_showChild2(),
...
_showChildN()
]
)
)
);

Wrap your column in SingleChildScrollView and then wrap SingleChildScrollView in a Center widget to center the widgets in the column.
Center(
child: SingleChildScrollView(
child: Column(
children: [
Text('First'),
//... other children
Text('Last'),
],
),
)