Hello I am trying to align to the left a ListView widget, this is the piece of code:
Column(children: [
Container(
alignment: Alignment.centerRight,
child: TextButton(
onPressed: () => _removeOptionForm(variantList),
child: Text("remove option")),
),
Row(children: [
Flexible(
child: Column(children: [
Container(
height: 50.0,
alignment: Alignment.centerRight,
child: ListView.builder(
key: UniqueKey(),
scrollDirection: Axis.horizontal,
itemCount: optionFormValueList.length,
itemBuilder: (BuildContext context, int index) {
return optionFormValueList[index];
})),
TextFormField(
controller: _optionNameController,
keyboardType: TextInputType.text,
autocorrect: false,
The ListView stays always to the right, even if I wrapped it on a Container and the last one on a Column.
Create Listview builder like this
return ListView.builder(
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
itemCount: data!.length,
itemBuilder: (context, index) => Column(
crossAxisAlignment: CrossAxisAlignment.start,
Related
I am new to flutter and would appreciate if someone could give me some hints on this:
I have to make few (not fixed number of) widgets which have to be expandable.
When expanded, they contain list of widgets in their body. List is long and it has to be scrollable in order to see all items.
If I put everything (whole expandable widget) inside SingleChildScrollView list items in body are scrollable, but also headers scroll - which I should prevent.
Widget _buildPanel() {
return SingleChildScrollView(
child: ExpansionPanelList.radio(
children: _data.map<ExpansionPanelRadio>((Item item) {
return ExpansionPanelRadio(
value: item.id,
headerBuilder: (BuildContext context, bool isExpanded) {
return Padding(
padding: const EdgeInsets.only(top: 60.0),
child: Row(
children: [
SvgPicture.network(
"https://some_picture.svg",
height: 80),
Column(children: <Widget>[
Text(' Some Text'),
Text(' label '),
]),
],
));
},
body: ListView.builder(
itemCount: widgets.length,
itemBuilder: (context, index) => ListTile(title: widgets[index]),
scrollDirection: Axis.vertical,
shrinkWrap: true,
physics: const NeverScrollableScrollPhysics(),
));
}).toList(),
));
}
and if I put only body inside SingleChildScrollView like this, then I got Exceptions.
Widget _buildPanel() {
return ExpansionPanelList.radio(
children: _data.map<ExpansionPanelRadio>((Item item) {
return ExpansionPanelRadio(
value: item.id,
headerBuilder: (BuildContext context, bool isExpanded) {
return Padding(
padding: const EdgeInsets.only(top: 60.0),
child: Row(
children: [
SvgPicture.network("https://some_picture.svg",
height: 80),
Column(children: <Widget>[
Text(' Some Text'),
Text(' label '),
]),
],
));
},
body: SingleChildScrollView(
child: ListView.builder(
itemCount: widgets.length,
itemBuilder: (context, index) => ListTile(title: widgets[index]),
scrollDirection: Axis.vertical,
shrinkWrap: true,
physics: const NeverScrollableScrollPhysics(),
)));
}).toList(),
);
}
Is it possible to scroll only list items and to keep header in fixed position?
You need to set height for your body and remove physics, shrinkWrap in order to get what you want, like this:
body: SizedBox(
height: 300,//<-- add this
child: ListView.builder(
itemCount: widgets.length,
itemBuilder: (context, index) =>
ListTile(title: widgets[index]),
scrollDirection: Axis.vertical,
),
),
I need to scroll the whole screen, i am using (single child scroll view => stack => ListView.builder). but there is no scrolling. however i am using:
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
The Code Is:
return Scaffold(
body: LayoutBuilder(builder: (context, constraints) {
return SingleChildScrollView(
physics: BouncingScrollPhysics(),
child: Container(
height: constraints.maxHeight,
child: Stack(children: <Widget>[
Container(color: Colors.red,height: 300,),
Container(
margin: EdgeInsets.only(
top: screen.isPhone ? 150 : 240,
),
child: Column(
children: [
Card(
elevation: 5,
child: ListView.builder(
itemCount: 20,
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
itemBuilder: (context, index) =>
ProductItemWidget(showDeleteIconButton: true),
),
),
Text("HEY"),
],
),
),
remove height: constraints.maxHeight,
In my application, I want to show two different products on the home screen, horizontally and vertically. But I want to do this with ListView.Builder as they both come as lists. I couldn't find the right usage of this, can you help with this?
SingleChildScrollView(
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
SizedBox(
height: 200.0,
child: ListView.builder(
physics: ClampingScrollPhysics(),
shrinkWrap: true,
scrollDirection: Axis.horizontal,
itemCount: 25,
itemBuilder: (BuildContext context, int index) =>
Card(
child: Center(child: Text('Horizontal List Child')),
),
),
),
ListView.builder(
itemCount: 10,
shrinkWrap: true,
scrollDirection: Axis.vertical,
itemBuilder: (context, index) {
return Expanded(
child: Card(
child:
Center(child: Text('Vertical List Child'))),
);
},
)
],
),
),
I can do it without using ListView.builder but I need to use ListView.builder. The height of the vertical part should be equal to the element inside.
You must need to define the height of any scroll view. I prefer the horizontal scroll view
SingleChildScrollView(
child: Column(
children: [
Container(
height: 150,
child: ListView.builder(
physics: ClampingScrollPhysics(),
shrinkWrap: true,
scrollDirection: Axis.horizontal,
itemCount: 25,
itemBuilder: (BuildContext context, int index) {
...
...
...
},
),
),
ListView.builder(
itemCount: 10,
shrinkWrap: true,
scrollDirection: Axis.vertical,
itemBuilder: (context, index) {
...
...
...
},
),
],
)
)
Remove the SingleChildScrollView.
Add an Expanded as parent to the second ListView.
Remove the Expanded from the Card
Scaffold(
body: SafeArea( //in case you dont have appbar
child: CustomScrollView(
physics: const BouncingScrollPhysics(),
slivers: [
const SliverToBoxAdaptar(child:Container(child:ListView(...)))// horizontalList
const SliverList()// verticalSliverList
],
),
),
);
try thiss
Expanded makes item inside becomes full body.
just remove it and the height to make item height equals to card
return Scaffold(
appBar: AppBar(
title: Text("Sample"),
),
body: Center(
// Center is a layout widget. It takes a single child and positions it
// in the middle of the parent.
child: SingleChildScrollView(
physics: ScrollPhysics(),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Padding(
padding: const EdgeInsets.all(8.0),
child: Text("Sample 1"),
),
Container(
height: 100,
child: ListView.builder(
physics: ScrollPhysics(),
itemCount: 5,
shrinkWrap: true,
scrollDirection: Axis.horizontal,
itemBuilder: (context, index) {
return Card(
child: Image.network("https://i.picsum.photos/id/9/250/250.jpg?hmac=tqDH5wEWHDN76mBIWEPzg1in6egMl49qZeguSaH9_VI",),
);
}
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Text("Sample 2"),
),
ListView.builder(
physics: ScrollPhysics(),
itemCount: 5,
shrinkWrap: true,
scrollDirection: Axis.vertical,
itemBuilder: (context, index) {
return Card(
child: Image.network("https://i.picsum.photos/id/9/250/250.jpg?hmac=tqDH5wEWHDN76mBIWEPzg1in6egMl49qZeguSaH9_VI"),
);
}
),
],
),
),
),
);
I need to use 3 horizontal ListView in the SingleChildScrollView widget. But nothing is displayed. I use these codes for one of ListViews:
Scaffold(
body: new SingleChildScrollView(
primary: true,
child: new Column(
mainAxisSize: MainAxisSize.min,
children: [
new ListView.builder(
primary: false,
shrinkWrap: true,
physics: const NeverScrollableScrollPhysics(),
itemCount: _categoryModel.length,
scrollDirection: Axis.horizontal,
itemBuilder: (context, index) => new Card(
child: new Center(
child: Padding(
padding: const EdgeInsets.symmetric(vertical: 10, horizontal: 16),
child: new Text(_categoryModel[index].title),
),
),
))
],
),
))
How can I fix this error without using the container with a height?
try wrapping your ListView with Expanded
Use Wrap widget instead of ListView.
Use This :
Scaffold(
body: new SingleChildScrollView(
child: new Container(
child: new ListView.builder(
primary: false,
shrinkWrap: true,
physics: const NeverScrollableScrollPhysics(),
itemCount: _categoryModel.length,
scrollDirection: Axis.horizontal,
itemBuilder: (context, index) => new Card(
child: new Center(
child: Padding(
padding: const EdgeInsets.symmetric(vertical: 10, horizontal: 16),
child: new Text(_categoryModel[index].title),
),
),
))
),
))
I cannot figure out how to create a Scrolling Wrap Widget inside my app that displays a number of items over 2 lines and is scrollable Horizontally to reveal the lines content:
return
SafeArea(
child: SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: Wrap(
direction: Axis.horizontal,
runAlignment: WrapAlignment.center,
children:[
for (var i=0;i<10;i++) Card(
elevation: 6,
color: Colors.primaries[Random().nextInt(Colors.primaries.length)],
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Text(title,),
),
),
]
),
),
);
The result for this is :
I tired to wrap the Wrap with a Container with fixed height and every other combination imaginable and have not found a way to do this correctly, Basically I want to achieve a grid like functionality where the children are not all constrained to a fixed sized cell but are maintaining their variable width .
Expected result as requested would be a scroll-able list that looks like this:
This Answer Will Help You.
List<String> list = ['Long text', 'Even longer text', 'Long text', 'Even longer text', 'Text', 'Text', 'Short text', 'Text', 'Short text', 'Long text', 'Even longer text'];
SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
SizedBox(
height: 50,
child: ListView.builder(
physics: NeverScrollableScrollPhysics(),
shrinkWrap: true,
scrollDirection: Axis.horizontal,
itemCount: list.length,
itemBuilder: (context, index) {
return index.isEven ? CardWidget(list[index]) : Container();
},
),
),
SizedBox(
height: 50,
child: ListView.builder(
physics: NeverScrollableScrollPhysics(),
shrinkWrap: true,
scrollDirection: Axis.horizontal,
itemCount: list.length,
itemBuilder: (context, index) {
return index.isOdd ? CardWidget(list[index]) : Container();
},
),
)
],
),
)
I refer from this solution.
Output like this
I was have similar problem and I fixed with constrained box. And can you try this;
return SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: ConstrainedBox(
constraints: BoxConstraints(
maxHeight: MediaQuery.of(context).size.height * 0.25,
maxWidth: MediaQuery.of(context).size.width * 1.5,
),
child: Wrap(
direction: Axis.horizontal,
crossAxisAlignment: WrapCrossAlignment.end,
alignment: WrapAlignment.start,
spacing: 10,
runSpacing: 2,
children: List.generate(
myList.length,
(index) {
return ChoiceChip(
onSelected: (bool isSelected) {
//when selected it works code
},
label: SizedBox(
height: 20,
child: Text(name),
),
selected: false);
},
).toList(),
),
),
);