How to make flutter ListView.builder without a specific height(dynamic or not declare the height)
I want to make a list of item, and then when the item going to full height it will wrapped
When i run this code, it returns error because it need height and width
I want to make the list of item like this
Wrap(
spacing: 12,
runSpacing: 10,
children: [
ListView.builder(
shrinkWrap: true,
scrollDirection: Axis.horizontal,
itemCount: movieDetail['genre'].length,
itemBuilder: (context, index) {
return ClipRRect(
borderRadius: BorderRadius.circular(8),
child: Container(
color: darkGrayColor,
child: Padding(
padding: EdgeInsets.symmetric(
vertical: 4, horizontal: 12),
child: Text('Testing', style: secondaryInfoText),
),
),
);
},
),
],
),
Use GridView.builder
GridView.builder(
scrollDirection: Axis.horizontal,
itemCount: movieDetail['genre'].length,
gridDelegate: new SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 2, childAspectRatio: 1),
itemBuilder: (context, index) {
...
}
Related
I want to have a horizontally scrollable container and inside it somewhere a ListView, which scrolls vertically:
return SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: ListView.builder(
shrinkWrap: true,
primary: false,
itemCount: 5,
itemBuilder: (context, index) {
return const SizedBox(
height: 10,
width: 10,
);
},
),
);
but I get this error: RenderBox was not laid out. I already put Expanded around everything imaginable. It has to be a SingleChildScrollView.
I need help.
Provide width on ListView, it will solve the issue.
LayoutBuilder( /// needed to be top level
builder: (context, constraints) => SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: SizedBox(
width: constraints.maxWidth,
child: ListView.builder(
primary: false,
physics: ClampingScrollPhysics(),
itemCount: 5,
itemBuilder: (context, index) {
return const SizedBox(
height: 10,
width: 10,
);
},
),
),
),
);
SingleChildScrollView(
scrollDirection: Axis.horizontal,
child: SizedBox(
width: MediaQuery.of(context).size.width, //you may get different way like LayoutBuilder on top level
child: ListView.builder(
primary: false,
physics: ClampingScrollPhysics(),
itemCount: 5,
itemBuilder: (context, index) {
return const SizedBox(
height: 10,
width: 10,
);
},
),
),
);
So I'm trying to implement a flex listview similar to the google FlexLayoutManager to the horizontal axis with wrap, you can see an example in the wrap section
https://github.com/google/flexbox-layout/raw/main/assets/flex-wrap.gif
here is my code:
ListView.builder(
scrollDirection: Axis.horizontal,
itemCount: categories.length,
padding: EdgeInsetsDirectional.only(start: 16, end: 12),
itemBuilder: (context, index) {
return InkWell(
onTap: (){
},
child: Container(
height: 24,
alignment: Alignment.center,
child: Text(
categories[index].name,
),
),
);
},
)
what I have to add to my listview to make the items wrap and move to the next row if they exceeded the screen width?
Not tested, but as I indicated in my comment, I'd use something like:
Wrap(
children: [
for (final c in categories)
InkWell(child: Text(c.name)),
]);
adding of course all your parameters, and the extra container.
As an alternative, you can use a GridView.builder instead of ListView.builder:
Creates a scrollable, 2D array of widgets that are created on demand.
result:
I have made my window very small and the children still wrap:
With the window maximized:
code:
GridView.builder(
gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
maxCrossAxisExtent: 200,
childAspectRatio: 3 / 2,
crossAxisSpacing: 20,
mainAxisSpacing: 20),
itemCount: _categories.length,
padding: EdgeInsetsDirectional.only(start: 16, end: 12),
itemBuilder: (context, index) {
return InkWell(
onTap: () {},
child: Container(
height: 24,
alignment: Alignment.center,
child: Text(
categories[index].name,
),
),
);
},
)
In the following code, all items are displayed on a separate line i.e. each item spans over the entire row. How can I change the code so that multiple items can appear on the same line?
Thanks in Advance :)
Expanded(
child: SizedBox(
child: new ListView.builder(
shrinkWrap: true,
scrollDirection: Axis.vertical,
itemCount: filterStatus == false
? allDeals.length
: filteredDeals.length,
itemBuilder: (BuildContext ctx, int index) {
return Container(
margin: EdgeInsets.only(top: 20.0),
child: ListTile(...)
);
}
),
),
),
If you want to do something like this:
You can use the GridView.builder.
Here is the code that built the example from the screenshot.
GridView.builder(
gridDelegate: SliverGridDelegateWithMaxCrossAxisExtent(
maxCrossAxisExtent: 100, // the size of item
crossAxisSpacing: 10, // margin of 10px top and bottom
mainAxisSpacing: 10, // margin of 10px left and right
// the spacing is not applicable on the GridView margins.
),
itemCount: 30,
itemBuilder: (_, index) {
return Container(
color: Colors.blue,
child: Center(
child: Text(
'Item $index',
),
),
);
},
),
I have 2 rows of Listview builders (scrollable horizontally) showing interests.
Hoping that the first row will show the first 6 interests, and the next row showing the rest on the list.
How do I make the itemCount in the second as a range from 7 all the way to the end?
Any help is appreciated. The snippet of the code is as follows:
Padding(
padding: const EdgeInsets.fromLTRB(6, 6, 0, 0),
child: Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height * 0.045,
child: ListView.builder(
shrinkWrap: true,
scrollDirection: Axis.horizontal,
padding: const EdgeInsets.all(1),
itemCount: 6,
itemBuilder: (context, int index) {
return Interests2(AvailableInterestChosen(
allInterests[index],
isChosen: false,
));
}),
),
),
Padding(
padding: const EdgeInsets.fromLTRB(6, 3, 0, 0),
child: Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height * 0.045,
child: ListView.builder(
shrinkWrap: true,
scrollDirection: Axis.horizontal,
padding: const EdgeInsets.all(1),
**// itemCount: allInterests range from 6 to end of list,**
itemBuilder: (context, int index) {
return Interests2(AvailableInterestChosen(
allInterests[index],
isChosen: false,
));
}),
),
),
...
The bold part in the 2nd padding is where I'm having trouble building the range.
You can call your second list view in listview.builder like that
ListView.builder(
shrinkWrap: true,
scrollDirection: Axis.horizontal,
padding: const EdgeInsets.all(1),
itemBuilder: (context, int index) {
return Interests2(AvailableInterestChosen(
allInterests[6+index],
isChosen: false,
));
As parameters for second List view, you can use allInterests.size()-6 for item count, and index + 6 for access index to allInterests list.
second part:
Padding(
padding: const EdgeInsets.fromLTRB(6, 3, 0, 0),
child: Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height * 0.045,
child: ListView.builder(
shrinkWrap: true,
scrollDirection: Axis.horizontal,
padding: const EdgeInsets.all(1),
**// itemCount: allInterests range from 6 to end of list,**
itemBuilder: (context, int index) {
int newIndex = index + 6;
return Interests2(AvailableInterestChosen(
allInterests[newIndex],
isChosen: false,
));
}),
itemCount: allInterests.length - 6
),
),
Below is my code, I want to add some extra space of height 50, which comes at the end of list item. because when my second child of stack appears it nearly overlaps the last item of list view. I've tried wrapping ListView.builder with column and added a container at last but destroyed my whole structure. for this scenario I've to wrap the column into Single scrollable which pushed stack 2nd widget to be at the end of ListItem.(But I don't want Stack 2nd object to be scrollable).
As you can see I'm not able to click on HotDog.
body: Stack(
children: <Widget>[
ListView.builder(
itemCount: itemData.length,
shrinkWrap: true,
scrollDirection: Axis.vertical,
itemBuilder: (BuildContext context,int index){
return Text(data[index].name);
}
),
Padding(
padding: const EdgeInsets.all(10.0),
child: Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(8),
color: Colors.cyan
),
padding: EdgeInsets.all(10),
height: 60,
),
)
],
),
How about you add empty last item like below code?
ListView.builder(
itemCount: itemData.length + 1,
shrinkWrap: true,
scrollDirection: Axis.vertical,
itemBuilder: (BuildContext context,int index){
if (index == item.Data.length) {
return SizedBox(height: 50);
} else {
return Text(data[index].name);
}
}
),
ListViewBuilder should be wrap inside Expanded widget which will take fullscreen
and give container bottom width as per need.
Example:
var itemData = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
Stack(
children: <Widget>[
Column(
children: <Widget>[
Expanded(
child: Container(
margin: EdgeInsets.only(bottom: 20),
child: ListView.builder(
itemCount: itemData.length,
shrinkWrap: true,
scrollDirection: Axis.vertical,
itemBuilder: (BuildContext context, int index) {
return Container(
height: 80,
child: Text("Text :" + index.toString()));
}),
),
),
Align(
alignment: Alignment.bottomCenter,
child: Padding(
padding: const EdgeInsets.all(10.0),
child: Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(8),
color: Colors.cyan),
padding: EdgeInsets.all(10),
height: 60,
),
),
)
],
),
],
),
Output:
This can be easily done by adding bottom padding in listview.builder
Expanded(
child: ListView.builder(
padding: EdgeInsets.only(bottom: 100), //Increase this as per your requirment
itemCount: 5,
itemBuilder: (cxt , idx) {
return YourWidget();
}
Since you're listview.builder is inside a stack, you simply use the Positioned widget for this. Simply wrap your listview with Positioned like below:
Positioned(
bottom:50, //adjust this since this is the padding inside the stack
child:Container(
width:MediaQuery.of(context).size.width //width of the whole phone
child: ListView.builder(
itemCount: itemData.length,
shrinkWrap: true,
scrollDirection: Axis.vertical,
itemBuilder: (BuildContext context,int index){
return Text(data[index].name);
}
),
),
),
To ensure your Container stays at the bottom wrap it with a positioned widget and set the bottom property to 0:
Positioned(
bottom:0, //adjust this since this is the padding inside the stack
child:Container(),
),
Here is a one minute clip showing how to use the Positioned widget: https://www.youtube.com/watch?v=EgtPleVwxBQ
There is no specific way to do it by default you have to do it manually with own logic
ListView.builder(
itemCount: itemData.length,
shrinkWrap: true,
scrollDirection: Axis.vertical,
itemBuilder: (BuildContext context,int index){
if(index == itemData.length - 1 )
return Padding(
padding: EdgeInsets.only(bottom : 50),
child : Text(data[index].name)
);
return Text(data[index].name);
}),