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it's possible to make listview in expand and fill the container without overflow the container, and shrink when listview is short of content without declare manual min or max height?
Code
Flexible(
fit: FlexFit.loose,
child: Container(
padding: EdgeInsets.symmetric(vertical: 20, horizontal: 10),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(kBoxRadius),
boxShadow: [kBoxShadow]),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
DText(
"Aug 2021",
size: 12,
weight: FontWeight.bold,
),
SizedBox(height: 10),
Row(
children: dates,
),
SizedBox(height: 15),
Container(
height: 1,
color: Color(0xFFE7E7E7),
),
Container(
constraints:
BoxConstraints(minHeight: 0, maxHeight: 600),
child: ListView.separated(
shrinkWrap: true,
itemBuilder: (context, index) {
return DText("Asd");
},
separatorBuilder: (_, __) {
return SizedBox(height: 10);
},
itemCount: 20,
),
)
],
),
),
)
Expectation
when the content is big
because i set manually max height.
Yes, it is possible using shrinkWrap: true. The code will be something like below,
class App extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(),
body: Center(
child: Container(
color: Colors.red,
child: ListView(
shrinkWrap: true,
children: <Widget>[
ListTile(title: Text('Apple')),
ListTile(title: Text('Orange')),
ListTile(title: Text('Banana')),
],
),
),
),
),
);
}
}
I am trying to nest the ListView in a Listview as per the below code, the Listview on top is scrolling horizontally and the nested ListView is scrolling vertically . for the nested ListView I am facing the error of
Viewports expand in the cross axis to fill their container and
constrain their children to match their extent in the cross axis. In
this case, a vertical viewport was given an unlimited amount of
horizontal space in which to expand.
How should I resolve it so that the Nested View is also shown in the below code?
new Container(
child: new ListView(
scrollDirection: Axis.horizontal,
children: <Widget>[
ListView(
scrollDirection:Axis.vertical,
children: <Widget>[new Container(
padding: EdgeInsets.fromLTRB(10, 20,10, 0),
width: screenSize.width,
child: new Column(
children: <Widget>[
Column(children: <Widget>[
Row(children: <Widget>[
Text('Text1'),
Text('Text1'),
],),
Row(children: <Widget>[
Text('Text1'),
Text('Text1'),
],),
],),
new Container(
//ERROR POINT
child: new ListView(
scrollDirection: Axis.vertical,
shrinkWrap: true,
children: <Widget>[
new Container(
color: Colors.red,
width: screenSize.width,
child: new Center(
child: new Text(
'RED',
style: new TextStyle(
fontSize: 40.0,
color: Colors.white
),
),
),
),
new Container(
color: Colors.blue,
width: screenSize.width,
child: new Center(
child: new Text(
'BLUE',
style: new TextStyle(
fontSize: 40.0,
color: Colors.white
),
),
),
),
new Container(
color: Colors.orange,
width: screenSize.width,
child: new Center(
child: new Text(
'ORANGE',
style: new TextStyle(
fontSize: 40.0,
color: Colors.white
),
),
),
)
],
),
)
],
),
),],
),
new Container(
color: Colors.blue,
width: screenSize.width,
child: new Center(
child: new Text(
'BLUE',
style: new TextStyle(
fontSize: 40.0,
color: Colors.white
),
),
),
),
new Container(
color: Colors.orange,
width: screenSize.width,
child: new Center(
child: new Text(
'ORANGE',
style: new TextStyle(
fontSize: 40.0,
color: Colors.white
),
),
),
)
],
),
)
DO NOT wrap widgets with an empty Container
For nested ListView you have to constrain its width via either SizedBox or Container, like so:
ListView(
scrollDirection: Axis.horizontal,
children: [
SizedBox(
child: ListView(
children: [
Text('data'),
Text('data'),
Text('data'),
],
),
width: 300,
),
SizedBox(
child: ListView(
children: [
Text('data'),
Text('data'),
Text('data'),
],
),
width: 300,
),
SizedBox(
child: ListView(
children: [
Text('data'),
Text('data'),
Text('data'),
],
),
width: 300,
),
],
)
If you want to keep all nested scroll views positions you could wrap them in a SingleChildScrollView with Row, but it seems something is not quite right in your decision
SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: Row(
children: [
SizedBox(
width: 200,
child: ListView.builder(
itemBuilder: (context, index) => Text('data $index'),
itemCount: 200,
),
),
SizedBox(
width: 200,
child: ListView.builder(
itemBuilder: (context, index) => Text('data $index'),
itemCount: 200,
),
),
SizedBox(
width: 300,
child: ListView.builder(
itemBuilder: (context, index) => Text('data $index'),
itemCount: 200,
),
),
SizedBox(
width: 300,
child: ListView.builder(
itemBuilder: (context, index) => Text('data $index'),
itemCount: 200,
),
),
SizedBox(
width: 300,
child: ListView.builder(itemBuilder: (context, index) => Text('data $index'), itemCount: 200),
),
SizedBox(
width: 300,
child: ListView.builder(itemBuilder: (context, index) => Text('data $index'), itemCount: 200),
),
],
),
)
In my Flutter project, I have a container with a fixed height. Inside that container I have a Listview.
Here's the code-
return new Scaffold(
appBar: AppBar(
title: Text("All Values"),
),
body: new Column(
crossAxisAlignment: CrossAxisAlignment.end,
children: <Widget>[
Container(
height: isLoading ? 50.0 : 0,
color: Colors.white70,
child: Center(
child: new CircularProgressIndicator(),
),
),
Expanded(
child: Container(
height: 350,
color: Colors.red,
alignment: Alignment.bottomLeft,
child:
new ListView.builder(
itemCount: data.length-8,
itemBuilder: (BuildContext cxtx, int index) {
return Padding(
padding: const EdgeInsets.fromLTRB(10, 0.0, 10, 0),
child: Container(
child: showCard(index, radius),
),
);
},
controller: _scrollController,
),
),),
],
),
resizeToAvoidBottomPadding: false,
);
The code outputs like below-
So, the problem is I want to align these items at bottom left of the container. I could have done that using reverse: true but I need the list items with the same sequence. So, I need suggestion how can I do that?
You need those items in a row or a column? Follow with a row possibility:
Try this:
return new Scaffold(
appBar: AppBar(
title: Text("All Values"),
),
body: Column(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.end,
children: <Widget>[
if(isLoading)
Container(
height: 50.0 ,
color: Colors.white70,
child: Center(
child: new CircularProgressIndicator(),
),
),
Expanded(
child: Container(
height: 350,
color: Colors.red,
alignment: Alignment.bottomLeft,
child: new ListView.builder(
itemCount: data.length - 8,
itemBuilder: (BuildContext cxtx, int index) {
return Padding(
padding: const EdgeInsets.fromLTRB(10, 0.0, 10, 0),
child: Container(
child: Text('asdf'),
),
);
},
controller: _scrollController,
),
),
),
],
),
resizeToAvoidBottomPadding: false,
);
StoreConnector<_ViewModel, List<Message>>(
converter: (store) {
// check mark ,reverse data list
if (isReverse) return store.state.dialogList;
return store.state.dialogList.reversed.toList();
},
builder: (context, dialogs) {
// Add a callback when UI render after. then change it direction;
WidgetsBinding.instance.addPostFrameCallback((t) {
// check it's items could be scroll
bool newMark = _listViewController.position.maxScrollExtent > 0;
if (isReverse != newMark) { // need
isReverse = newMark; // rebuild listview
setState(() {});
}
});
return ListView.builder(
reverse: isReverse, // 反转列表，insert数据时，刷新到0，加载更多时，滚动偏移不变
controller: _listViewController,
itemBuilder: (context, index) => _bubbleItem(context, dialogs[index], index),
itemCount: dialogs.length,
);
},
)
So i have this script which is build a listview
class NewProductsLists extends StatelessWidget {
final List<NewProducts> newlist;
NewProductsLists({Key key, this.newlist}) : super(key: key);
final formatCurrency =
new NumberFormat.simpleCurrency(locale: "id", decimalDigits: 2);
#override
Widget build(BuildContext context) {
return Expanded(
child: ListView.builder(
itemCount: newlist.length,
shrinkWrap: true,
scrollDirection: Axis.horizontal,
itemBuilder: (BuildContext context, int index) {
return GestureDetector(
onTap: () {
print("Product detail");
},
child: Card(
child: Container(
width: MediaQuery.of(context).size.width * 0.50,
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Image.network(
Configuration.url +
"assets/app_assets/" +
newlist[index].productImage,
width: 90,
height: 90,
filterQuality: FilterQuality.low),
ListTile(
title: Center(
child: Text(
newlist[index].productName,
style: TextStyle(fontSize: 18),
)),
subtitle: Center(
child: Text(
formatCurrency.format(
int.parse(newlist[index].productPrice)),
style: TextStyle(color: Colors.red, fontSize: 15),
)),
),
],
)),
),
);
}));
}
}
and the result looks like this
[
As you can see the card is expanding so hard. I know it is because the Expanded widget. Is it possible to make the card wrap_content ?
For horizontal list view needs fixed height if its not going to be vertical scrollable view you can use Expanded widget with varying flex to get it working.
Working build widget by using expanded widget.
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
centerTitle: false,
title: const Text('November'),
),
body: new Container(
child: Column(
children: <Widget>[
new Expanded(flex: 1,child: new Container(color: Colors.grey[300],),),
Expanded(flex: 2,
child: ListView.builder(
itemCount: 10,
shrinkWrap: true,
scrollDirection: Axis.horizontal,
itemBuilder: (BuildContext context, int index) {
return GestureDetector(
onTap: () {
print("Product detail");
},
child: Card(
child: Container(
width: MediaQuery.of(context).size.width * 0.50,
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Image.network(
'https://homepages.cae.wisc.edu/~ece533/images/watch.png',
width: 90,
height: 90,
filterQuality: FilterQuality.low),
ListTile(
title: Center(
child: Text(
'item Name ${index}',
style: TextStyle(fontSize: 18),
)),
subtitle: Center(
child: Text(
'\$10',
style: TextStyle(
color: Colors.red, fontSize: 15),
)),
),
],
)),
),
);
}),
),
new Expanded(flex: 3,child: new Container(color: Colors.amber[100],),),
],
)));
}
Result screen
Let me know if it suits your requirement.
I am developing a Flutter application and I want to dynamically adjust the height of the ListView.
I want the list to have a maximum height of 200. If the height is more than that, user will have to scroll to reach the bottom. If height is below 200, it will take only as much space as needed.
Preview of application: Screenshot. As you can see Restaurants nearby is pushed to the very bottom of the page. I want the ListView to only take height of 200 or less so that the content below isn't pushed to the bottom.
Here is my current code:
#override
Widget build(BuildContext context) {
return Container(
padding: EdgeInsets.all(10.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
'Restaurants nearby',
style: TextStyle(
fontSize: 20.0,
fontWeight: FontWeight.bold,
),
),
Divider(),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
RaisedButton(
child: Text('Enter restaurant manually'),
onPressed: () {
print('Button pressed');
},
),
],
),
Flexible(
child: ListView.builder(
itemBuilder: (BuildContext context, int index) {
return ListTile(
leading: CircleAvatar(
backgroundColor: Colors.cyan,
),
title: Text('Test restaurant'),
subtitle: Text('80m'),
);
},
itemCount: 15,
),
),
Text(
'Restaurants nearby',
style: TextStyle(
fontSize: 20.0,
fontWeight: FontWeight.bold,
),
),
],
),
);
}
You are using Flexible widget, that's why your ListView expands. You have to change Flexible to ConstrainedBox and add shrinkWrap: true to your ListView.
ConstrainedBox(
constraints: BoxConstraints(maxHeight: 200, minHeight: 56.0),
child: ListView.builder(
shrinkWrap: true,
itemBuilder: (BuildContext context, int index) {
return ListTile(
leading: CircleAvatar(
backgroundColor: Colors.cyan,
),
title: Text('Test restaurant'),
subtitle: Text('80m'),
);
},
itemCount: 15,
),
),
More info here: https://api.flutter.dev/flutter/widgets/ConstrainedBox-class.html
You can use LimitedBox
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(...),
Divider(),
Row(...),
LimitedBox(
maxHeight: 200.0,
child: ListView.builder(...),
),
Text(...),
],
),
Recommended solution in case when the incoming constraints are unbounded
Consider wrapping the ListView into this
LimitedBox(
maxHeight: 200,
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Flexible(
child: ListView.builder(
shrinkWrap: true,
itemBuilder: (BuildContext context, int index) {
return ListTile(
leading: CircleAvatar(
backgroundColor: Colors.cyan,
),
title: Text('Test restaurant'),
subtitle: Text('80m'),
);
},
itemCount: _itemsCount,
),
),
]
)
),
Note that:
shrinkWrap of ListView is set to true
mainAxisSize of Column is set to MainAxisSize.min
maxHeight of LimitedBox is set to 200
A complete snippet:
import 'package:flutter/material.dart';
class DebugWidget extends StatefulWidget {
#override
_DebugWidgetState createState() => _DebugWidgetState();
}
class _DebugWidgetState extends State<DebugWidget> {
int _itemsCount = 1;
#override
Widget build(BuildContext context) {
Widget child = Container(
padding: EdgeInsets.all(10.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
'Restaurants nearby',
style: TextStyle(
fontSize: 20.0,
fontWeight: FontWeight.bold,
),
),
Divider(),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
RaisedButton(
child: Text('Enter restaurant manually'),
onPressed: () {
print('Button pressed');
},
),
RaisedButton(
child: Text('+1'),
onPressed: () {
setState(() {
_itemsCount += 1;
});
},
),
RaisedButton(
child: Text('-1'),
onPressed: () {
setState(() {
_itemsCount -= 1;
});
},
),
],
),
LimitedBox(
maxHeight: 200,
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Flexible(
child: ListView.builder(
shrinkWrap: true,
itemBuilder: (BuildContext context, int index) {
return ListTile(
leading: CircleAvatar(
backgroundColor: Colors.cyan,
),
title: Text('Test restaurant'),
subtitle: Text('80m'),
);
},
itemCount: _itemsCount,
),
),
]
)
),
Text(
'Restaurants nearby',
style: TextStyle(
fontSize: 20.0,
fontWeight: FontWeight.bold,
),
),
],
),
);
return Scaffold(
body: child,
);
}
}
I found a solution to this problem. you should wrap your ListView with LimittedBox or ConstraintBox and give them maxHeight and set shrinkWrap property of ListView to true. the solution would be something like this.
LimitedBox(
maxHeight: 200,
child: ListView.builder(
shrinkWrap: true,
itemBuilder: (BuildContext context, int index) {
return ListTile(
leading: CircleAvatar(
backgroundColor: Colors.cyan,
),
title: Text('Test restaurant'),
subtitle: Text('80m'),
);
},
itemCount: 15,
),
),
I see that this question has never been answered only with giving a fixed height, so here is what works for me.
For some reason if you set the shrinkwrap to true it doesn't look like it is working but it does, the problem is in the padding settings of the ListView, set the padding to edgeinstets.zero. That fixes it for me.
Wrap inside a Flexible
ShrinkWrap true
Padding, zero
and if needed the column to MainAxisSize.min.
Hope it helps some people.
Example of my code:
Flexible(
child: Container(
decoration: BStyles.cardDecoration1,
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
const Text(
'PRODUCTION TASKS',
),
const SizedBox(
height: textVerticalSpacing,
),
Flexible(
child: ListView.builder(
itemCount: recentTasks.length,
padding: EdgeInsets.zero,
physics: const NeverScrollableScrollPhysics(),
shrinkWrap: true,
itemBuilder: (BuildContext context, int index) {
return TaskCard(
task: recentTasks[index],
widthInfo: MediaQuery.of(context).size.width * 0.6,
);
},
),
),
const SizedBox(
height: itemSpacing,
),
Align(
alignment: Alignment.centerRight,
child: InkWell(
onTap: () { },
child: const Text(
'View more',
),
),
),
const SizedBox(
height: textVerticalSpacing,
),
],
),
),
),
),
ConstrainedBox(
constraints: BoxConstraints(maxHeight: 200.0),
child: [your child here],
)
This make your child's height not bigger than 200.0
You can always size the ListView container as % of the viewport (assuming of course that the other widgets also are sized in the same manner):
return Container(
height: MediaQuery.of(context).size.height * 0.75,
child: ListView.builder(
itemBuilder: (ctx, index) {
return Card(...