I have this code which causes the bottom to overlap and I cannot figure out what to do. I use a listview.builder which has a column with another listview.builder inside.
image of overlap of text but the listtile continues
the code
body: SafeArea(
child: SingleChildScrollView(
child: Container(
padding: EdgeInsets.fromLTRB(
(_deviceWidth! * 0.05), 10, (_deviceWidth! * 0.05), 0),
child: Column(
children: [
_titleText(),
ListView.builder(
itemCount: _exercises.length,
physics: NeverScrollableScrollPhysics(),
shrinkWrap: true,
itemBuilder: (BuildContext context, int _index) {
return Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisSize: MainAxisSize.max,
children: [
if (_exercises[_index].sets.isNotEmpty)
Text(_exercises[_index].name),
ListView.builder(
physics: NeverScrollableScrollPhysics(),
shrinkWrap: true,
itemCount: _exercises[_index].sets.length,
itemBuilder: (BuildContext _context, int _index2) {
return ListTile(
leading: Text("Sæt " + (_index2 + 1).toString()),
trailing: Text(
_exercises[_index].sets[_index2].reps.toString() +
" reps"),
tileColor: Colors.grey,
onTap: () {
_repsPopUp(_index, _index2);
},
title: Text(_exercises[_index].name),
onLongPress: () {
setState(() {
_exercises[_index].sets.removeAt(_index2);
if (_exercises[_index].sets.isEmpty) {
_exercises.removeAt(_index);
}
});
},
)
}),
],
);
});
],
),
),
),
),
My screen have one widget from top to middle screen, and the follow widget stands from middle to bottom. I only want scroll the second (the following) widget:
Widget _showList(){
return SingleChildScrollView(
child: _sEv.length !=null
? ListView.builder(
physics: AlwaysScrollableScrollPhysics(),
scrollDirection: Axis.vertical,
shrinkWrap: true,
itemCount: _sEv.length,
itemBuilder: (BuildContext context, int index) {
return GestureDetector(
onTap: () {
_showTimePicker(context, index);
},
child: Dismissible(
child: ListTile(
leading: Padding(padding: EdgeInsets.only(top: 10), child: Icon(Icons.calendar_today_rounded)),
title: Text(mytxt),
subtitle: Text(mytxt2)
key: UniqueKey(),
direction: DismissDirection.startToEnd,
onDismissed: (DismissDirection direction) {
setState(() {
//do something
});
}
),);
},
)
: Center(child: Text("there is nothing here")),
);
}
But it is not scrolling at all, what I'm missing? This widget is being called from a column widget ( the first one on screen )
Update (where showList is called)
body: SingleChildScrollView(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
TableCalendar(
//default code in flutter doc
),
Divider(),
_showList(),
],
I am having a hard time figuring out how to get my FilterChips in a row.
I would like to display all FilterChips per category in a row and not in a seperated column.
Tried different approaches but non of them seems to work.
Hopefully someone can help me with this, thanks for help!
Here is my code:
Widget _buildListView(List<Category> categories) {
return Column(
children: [
Expanded(
child: ListView.builder(
shrinkWrap: true,
itemCount: categories.length,
itemBuilder: (context, index) {
return _buildSection(categories[index]);
},
),
),
],
);
}
Widget _buildSection(Category category) {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
category.title,
style: TextStyle(fontSize: 18),
),
// How can I get my FilterChips side by side?
Row(
children: [
Flexible(
child: ListView.builder(
shrinkWrap: true,
physics: ClampingScrollPhysics(),
itemCount: category.interests.length,
itemBuilder: (context, index) {
Interest interest = category.interests[index];
return FilterChip(label: Text(interest.interest), onSelected: (isSelected){
selectedInterests.add(interest.id);
});
return Text(interest.interest);
}),
),
],
),
],
);
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: FutureBuilder(
future: categories,
builder: (context, snapshot) {
if (snapshot.hasData) {
List<Category> categories = snapshot.data;
return _buildListView(categories);
}
return Center(child: CircularProgressIndicator());
},
),
);
}
class StackOver extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Padding(
padding: const EdgeInsets.only(
top: 60,
left: 10.0,
right: 10.0,
),
child: Wrap(
children: List.generate(
10,
(index) {
return FilterChip(
label: Text('index $index'),
onSelected: (val) {},
);
},
),
),
),
);
}
}
RESULT:
I want to implement multiple horizontal lists that contain cards with some details, and now all i get is just white screens(without errors)
This is my code:
Scaffold(
body: Column(
children: <Widget>[
Expanded(
child: ListView.builder(
scrollDirection: Axis.horizontal,
itemCount: 50,
itemBuilder: (BuildContext context, int index) {
Card(
child: Column(
children: <Widget>[
Text('fsfssffs'),
],
),
);
},
),
),
SizedBox(
height: 20.0,
),
Expanded(
child: ListView.builder(
scrollDirection: Axis.horizontal,
itemCount: 50,
itemBuilder: (BuildContext context, int index) {
Card(
child: Column(
children: <Widget>[
Text('fsfssffs'),
],
),
);
},
),
),
],
),
);
I want to achieve something like the facebook stories
Use => on List itemBuilder to return the items:
Scaffold(
body: Column(
children: <Widget>[
Expanded(
child: ListView.builder(
scrollDirection: Axis.horizontal,
itemCount: 50,
itemBuilder: (BuildContext context, int index) =>
Card(
child: Column(
children: <Widget>[
Text('fsfssffs'),
],
),
);
},
),
),
SizedBox(
height: 20.0,
),
Expanded(
child: ListView.builder(
scrollDirection: Axis.horizontal,
itemCount: 50,
itemBuilder: (BuildContext context, int index) =>
Card(
child: Column(
children: <Widget>[
Text('fsfssffs'),
],
),
);
},
),
),
],
),
);
You were not returning any widget from your itemBuilder method which is why you were unable to see anything on screen.
Basically, there are 2 solutions for this, I am giving you idea using a build() method you can do it in your itemBuilder.
(1) Use => (fat arrow notation)
Example:
Widget build(context) => Text("Hi");
(2) Use return.
Widget build(context) {
return Text("Hi");
}
What is the preferred way to achieve a nested ListView, or in other words, ListView Widgets that could be included within a scrollable parent?
Imagine a "Reports" page, where a section is an itemized list.
For child ListView, use that parameter:
shrinkWrap: true,
physics: ClampingScrollPhysics(),
Adding physics: ClampingScrollPhysics() and shrinkWrap: true did the trick for me.
sample code:
#override
Widget build(BuildContext context) {
return Container(
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Expanded(
child: ListView.builder(
shrinkWrap: true,
itemCount: 123,
itemBuilder: (BuildContext context, int index) {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text('Parent'),
ListView.builder(
itemCount: 2,
physics: ClampingScrollPhysics(),
shrinkWrap: true,
itemBuilder: (BuildContext context, int index) {
return Text('Child');
}),
],
);
}),
)
],
),
);
}
If you want to have the inner ListView be scrollable independently of the main scroll view, you should use NestedScrollView. Otherwise, use a CustomScrollView.
Here is some code illustrating the NestedScrollView approach.
import 'package:flutter/material.dart';
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new Scaffold(
body: new NestedScrollView(
headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
return <Widget>[
new SliverAppBar(
pinned: true,
title: new Text('Flutter Demo'),
),
];
},
body: new Column(
children: <Widget>[
new FlutterLogo(size: 100.0, colors: Colors.purple),
new Container(
height: 300.0,
child: new ListView.builder(
itemCount: 60,
itemBuilder: (BuildContext context, int index) {
return new Text('Item $index');
},
),
),
new FlutterLogo(size: 100.0, colors: Colors.orange),
],
),
),
);
}
}
For inner Listview I have just added below code and it solved for me
shrinkWrap: true,
physics: ScrollPhysics(),
Screenshot:
Code:
var _container = Container(
height: 200,
color: Colors.blue,
margin: EdgeInsets.symmetric(vertical: 10),
);
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text("ListView")),
body: Padding(
padding: const EdgeInsets.all(40.0),
child: ListView( // parent ListView
children: <Widget>[
_container,
_container,
Container(
height: 200, // give it a fixed height constraint
color: Colors.teal,
// child ListView
child: ListView.builder(itemBuilder: (_, i) => ListTile(title: Text("Item ${i}"))),
),
_container,
_container,
_container,
],
),
),
);
}
Thanks to Serdar Polat:
ListView.builder( // outer ListView
itemCount: 4,
itemBuilder: (_, index) {
return Column(
children: [
Container(
color: Colors.blue,
alignment: Alignment.center,
child: Text('Header $index'),
),
ListView.builder( // inner ListView
shrinkWrap: true, // 1st add
physics: ClampingScrollPhysics(), // 2nd add
itemCount: 10,
itemBuilder: (_, index) => ListTile(title: Text('Item $index')),
)
],
);
},
)
shrinkWrap to wrap your content and ClampingScrollPhysics to use the parent scroll
ListView.builder(
shrinkWrap: true,
physics: const ClampingScrollPhysics(),
itemCount: yourList.length,
itemBuilder: (context, index) => YourWidget(items[index]),
),
I use this:
scrollController.addListener(onScroll);
void onScroll(){
if(scrollController.offset == 0.0
|| scrollController.position.extentBefore == 0.0
|| scrollController.position.extentAfter == 0.0){
scrollPhysics = NeverScrollableScrollPhysics();
Future.delayed(Duration(seconds: 1), (){
scrollPhysics = ClampingScrollPhysics();
setState((){});
});
setState((){});;
}
}
Expanded(
child: ListView.builder(
shrinkWrap: true,
padding: const EdgeInsets.all(8),
itemCount: requestList.length,
itemBuilder: (BuildContext context, int index) {
int que = index;
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Container(
padding: const EdgeInsets.only(
left: 20,
top: 10,
bottom: 10,
right: 20),
child: Text(
'${que++} . ${requestList[index].question}',
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 14,
color: HexColor(HexColor.black),
fontFamily: 'montserrat_regular',
decoration: TextDecoration.none,
),
)),
ListView.builder(
itemCount: requestList[index].questionOptions!.length,
physics: ClampingScrollPhysics(),
shrinkWrap: true,
itemBuilder: (BuildContext context, int subindex) {
return Row(
children: <Widget>[
Radio(
value: 1,
groupValue: radio_value[index],
onChanged: (values) async {
setState(() {
radio_value[index] = 1;
qutionCheckModel[index].response =
"yes";
});
}),
Container(
child: Text(
requestList[index].questionOptions![subindex],
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 14,
color: HexColor(HexColor.black),
fontFamily: 'montserrat_regular',
decoration: TextDecoration.none,
),
),
),
],
);
}),
],
);
}),
),