Got the basic listview working with this code:
body: GetX<LokationListeCtrl>(
builder: (ctrl) => ListView.separated(
separatorBuilder: _separatorBuilder,
itemCount: ctrl.lokationListe.length,
itemBuilder: (BuildContext context, int index) {
return _lokationTile(ctrl.lokationListe.elementAt(index));
},
),
),
Ok great, so now I'll just add another list by wrapping the whole thing in a multiple child widget, but even before doing that, I'm already stuck trying to get the first list working:
body: Column(
children: [
GetX<LokationListeCtrl>(
builder: (ctrl) => ListView.separated(
separatorBuilder: _separatorBuilder,
itemCount: ctrl.lokationListe.length,
itemBuilder: (BuildContext context, int index) {
return _lokationTile(ctrl.lokationListe.elementAt(index));
},
),
),
],
),
Here using a Column, but it applies to all widgets with multiple children. The itemBuilder code is simply newer executed.
It seems like a simple and usefull thing to be able to do - the question is HOW to have multiple list in body, the "GetX way" ?
Found a solution. If we introduce a new Scaffold and wrap it in an Expanded, then GetX stops beeing an insulted little boy, and starts smiling again:
body: Column(
children: [
Expanded(
child: Scaffold(
body: MyBodyPadding(
// add space between appbar and first ListTile
child: GetX<LokationListeCtrl>(
builder: (ctrl) => ListView.separated(
separatorBuilder: _separatorBuilder,
itemCount: ctrl.lokationListe.length,
itemBuilder: (BuildContext context, int index) {
return _lokationTile(
ctrl.lokationListe.elementAt(index));
},
),
),
),
),
),
],
),
Related
In my Flutter app, I need to display two lists that are coming from the database, but I am having trouble getting both lists to display on the same screen. I am using two FutureBuilder widgets, but the first list is displaying correctly while the second list is still loading.
Here is the code I am using:
var future1 = FutureBuilder<List<QuranTextModel>>(
future: database.getQuranText(),
builder: (context, snapshot) {
if(snapshot.hasData){
return ScrollablePositionedList.builder(
itemScrollController: scrollToIndex,
itemCount: snapshot.data!.length,
initialScrollIndex: widget.position,
itemBuilder: (context, index) {
// Build the list item widget here
});
}else{
return const Center(child: CircularProgressIndicator(),);
}
}
);
var future2 = FutureBuilder<List<UrduTextModel>>(
future: database.getUrduTranlation(),
builder: (context, snapshot) {
if(snapshot.hasData){
return ScrollablePositionedList.builder(
itemScrollController: scrollToIndex,
itemCount: snapshot.data!.length,
initialScrollIndex: widget.position,
itemBuilder: (context, index) {
// Build the list item widget here
});
}else{
return const Center(child: CircularProgressIndicator(),);
}
}
);
Column(
children: [
SizedBox(
height: 200,
child: future1,
),
SizedBox(
height: 200,
child: future2,
),
],
)
The first FutureBuilder is used to build a list of QuranTextModel objects, and the second FutureBuilder is used to build a list of UrduTextModel objects. I am using a Column widget to display both lists, with each list contained within a SizedBox widget to give it a fixed height.
The issue I am having is that only the first list is displaying correctly, while the second list is still loading. How can I get both lists to display on the same screen?
Thank you for any help you can provide!
SingleChildScrollView(
child: Column(
children: [
SizedBox(
height: 200,
child: future1),
SizedBox(height: 200,child: future2,)
],
),
),
Try this.
also you have to check your future status before populate you can check that by using
if (snap.connectionState == ConnectionState.done) { your code. you can check does snpa has data in it. }
connection state has deferent states that can help you to make your UI more interactive
enter image description here
I want each list item to have its own route .I have attached a screenshot. My list view is customized, each item has its own name
Your question doesn't explain much, but rather than listview use listview.builder and then you can return any widget and pass your route based on itemindex.
ListView.builder(
itemCount: 10, *//Number of items in your static or dynamic*
itemBuilder: (context, index) {
return YourNewCommonWidgetForEveryItem(index);
},
),
For example I've to navigate the first item to somewhere else
Widget YourNewCommonWidgetForEveryItem(int Index){
return GestureDetector(
onTap:()=> index==0 ? locationtofirstItem : defaullt,
child: yourDesign(),
),
}
OfCourse the Above method won't work if you don't know where to navigate which item.
body: new ListView(
padding: const EdgeInsets.all(20.0),
children: List.generate(choices.length, (index) {
return Center(
child: ChoiceCard(
choice: choices[index],
item: choices[index],
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Detail(choice: choices[index])),
);},),);}))
I'm new to flutter and I want to organise the elements that I get from Firestore in a list with StickyHeaders. I would like to do it with an itemBuilder and the snapshot I get from the database.
My problem is the itemBuilder builds each item separately and has to be returned, but StickyHeader needs to have all items added as children.
How can I achieve this? Just as a reference I paste my code without the StickyHeader. buildItemBubble returns a Card Widget.
StreamBuilder(
stream: buildSnapshots(_filters),
builder: (context, snapshot) {
if (!snapshot.hasData)
return Center(
child: CircularProgressIndicator(),
);
return snapshot.data.documents.length == 0
? Center(child: Text('It\s empty here...'))
: CupertinoScrollbar(
child: ListView.builder(
key: new PageStorageKey('randomkey'),
shrinkWrap: true,
padding: const EdgeInsets.all(10.0),
itemCount: snapshot.data.documents.length,
itemBuilder: (ctx, i) =>
buildItemBubble(snapshot, i),
),
);
},
)
Added this plugin to flutter project. Here is my following code
body: SlidingUpPanel(
backdropEnabled:true,
panelSnapping:true,
defaultPanelState:PanelState.CLOSED,
panel:ListView.separated(
itemCount:2,
itemBuilder: (BuildContext context, int index){
return Text('ass');
},
separatorBuilder:(BuildContext context, int index){return Divider();},
collapsed:Container(),
),
The problem is when I fully open the slider , I cannot slide it back. If remove Listview it works fine. So how can I slide it back with listview?
This has been fixed in v1.0.0 of sliding_up_panel. If you update your pubspec.yaml to include v1.0.0 of sliding_up_panel and follow this guide, you should be able to get the desired behavior.
Here's what it would look like for your layout:
body: SlidingUpPanel(
backdropEnabled: true,
panelSnapping: true,
defaultPanelState: PanelState.CLOSED,
panelBuilder: (ScrollController sc) => ListView.separated(
controller: sc,
itemCount: 2,
itemBuilder: (BuildContext context, int index){
return Text('ass');
},
separatorBuilder: (BuildContext context, int index){
return Divider();
},
),
collapsed: Container(),
)
Widget servicesListview() {
return Container(
decoration: new BoxDecoration(color: const Color(0xFFEAEAEA)),
child: Column(
children: <Widget>[
ListView.builder(
scrollDirection: Axis.vertical,
itemCount: menServicesList.length,
itemBuilder: (BuildContext context, int index) {
Text(menServicesList[index].name);
}),
],
));
}
I am implementing listview in my flutter project whenever i call this method list is not visible.The page becomes blank,help me to solve this
I have a same problem.
The ListView.builder don't work inside a Column, this necessary use the Expanded.
The Expanded widget allows you to expand and fill the space with the relative widget.
See this:
child: Column(
children: <Widget>[
Expanded(
child: ListView.builder(
.......
)
)
]
)
Wrap your ListView inside of a Expanded or a Container widget, if you use a Container, you'll need to set a height/width.
This happens because ListView doesn't have a height/width property to edit.
EDIT
Don't forget to return your Text inside the itemBuilder property.
You're missing the return statement in your itemBuilder
itemBuilder: (BuildContext context, int index) {
return Text(menServicesList[index].name);
}),
or
itemBuilder: (BuildContext context, int index) => Text(menServicesList[index].name)),
If you remove Column widget from the ListView, the list will definitely appear
and if you want to give a decoration property to each element of a ListView.
Widget servicesListview() {
return ListView.builder(
scrollDirection: Axis.vertical,
itemCount: menServicesList.length,
itemBuilder: (BuildContext context, int index) {
Container(
decoration: new BoxDecoration(color: const Color(0xFFEAEAEA)),
child: Text(menServicesList[index].name)
);
})
}