This is my code. Here, I have used Listview.builder due to which whole data is displayed in 1 tablecell. What should I use at place of listview to display the data properly in different cells.
Or Any other way to display data dynamically from backend?
TableRow(children: [
TableCell(
child: FutureBuilder(
future: fetchProducts(),
builder: (context, snapshot){
if(snapshot.hasData) {
return ListView.builder(
itemCount: snapshot.data.length,
shrinkWrap: true,
itemBuilder: (BuildContext context, index){
Products product = snapshot.data[index];
return Text(//"Name :- "
'${product.pname}', style: TextStyle(fontSize: 15));
});
}},
)),]),
In place of tablerow use DataTable, it will automatically size itself, it has column and row children so its probably the best way to display your data, check this youtube vide out
https://www.youtube.com/watch?v=ktTajqbhIcY&vl=en
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
I am trying to finish my first flutter app
it is a Quran app, and i was able so far to fetch and show the data in page view, each page has list view which contains the data depending on user selection, so one listview can be very long
in the list view there is a list of rich texts, each containing textspans,
here is the code
PageView.builder(
controller: _pageController,
itemCount: ConstantsHelper.selectionCount[widget.args.type],
scrollDirection: Axis.horizontal,
reverse: true,
itemBuilder: (context, index) => StreamBuilder<Object>(
stream: null,
builder: (context, snapshot) {
return FutureBuilder(
future: Provider.of<QuranProvider>(context)
.getSelection(widget.args.type, index + 1),
builder: (context, snapshot) =>
snapshot.connectionState == ConnectionState.waiting
? CircularProgressIndicator()
: ListView.builder(
itemCount: 1,
scrollDirection: Axis.vertical,
itemBuilder: (ctx, index) => Column(
children: WidgetHelper().getContent(
Provider.of<QuranProvider>(context)
.ayas,
context),
),
),
);
},
),
),
basically this is how the app looks like
one rich text can be so long that it requires lots of scrolling and can take the entire page
now, what I need to do, is getting the scrolling position, so when the user opens the app, the app will automatically scroll to the correct page and line
the page part is already done, however, when I try to implement the scrollController I get error ScrollController attached to multiple scroll views
I tried to set a listener in initstate to the scroll listener, the problem is that i am not sure where to add the controller and the listener
the controller.position doesnt change when i scroll, which is not useful.
so, how can I listen to the scrolling position change with a pageview parent?
I am trying to only display certain data from a collection. In my example, I only want to show data in the list where the collection in name on firebase is equal to the name of the widget. I am unable to solve this problem
Expanded(
child: Container(
child: FutureBuilder(
future: getPosts(),
builder: (_,snapshot){
if(snapshot.data["name"]== widget.info.name){
return ListView.builder(
itemCount:
x,
itemBuilder: (_,index){
return ListTile(
title: Text(snapshot.data[index].data["name"]),
);
});
Expanded(
child: Container(
child: FutureBuilder(
future: getPosts(),
builder: (_,snapshot){
return ListView.builder(
itemCount:
snapshot.data,
itemBuilder: (_,index){
if(snapshot.data["name"]== widget.info.name){
return ListTile(
title:Text(snapshot.data[index].data["name"]),
);
}else{
return Container();
}
})}))
);
A better option will be to pass the widget name in the getPosts() function you defined and update the firebase query to do the filtering. This way it be much faster as firebase does the require indexing and will do the filtering in O(len(filtered_elements)) rather than current time complexity of O(len(all_elements)).
I followed the chat development app tutorial on the Flutter page, it's a single user app. I have now been able to create a database and store data in the database, but I now have a conundrum that I'm unable to resolve.
I'm loading the chats from the database using FutureBuilder
FutureBuilder(
future: _requestSqlDataAsync(),
builder: (context, snapshot) {
if (snapshot.data == null) {
return Container(
child: Center(
child: Text("Loading...."),
),
);
}
else {
return ListView.builder(
padding: EdgeInsets.all(8.0),
itemCount: snapshot.data.length,
itemBuilder: (BuildContext context, int index) {
return Text(snapshot.data[index].chat);
}
);
It successfully loads the data from the database but then I'm unable to pass submit new chats from TextController to the display widget in the following manner:
ListView.builder(
padding: EdgeInsets.all(8.0),
reverse: true,
itemBuilder: (_, int index) => _message[index],
itemCount: _message.length,
)
where _message is the widget that combines the data from the TextController along with animation, to display the chat.
Could anyone please guide me as to how I can load the data from the database and then pass the control for the chats to be loaded.
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),
),
);
},
)