flutter gridview vertical filling - flutter

By default GridView puts items in row until crossAxisCount will not reach
GridView.count(
crossAxisCount: 5,
mainAxisSpacing: 10,
crossAxisSpacing: 10,
padding: EdgeInsets.all(10.0),
children: hours
)
Is there way to change build direction from horizontal to vertical?


Changing the scroll direction should do what you want:
GridView.count(
crossAxisCount: 5,
mainAxisSpacing: 10,
scrollDirection: Axis.vertical,
crossAxisSpacing: 10,
padding: EdgeInsets.all(10.0),
children: hours
)

Related

How to layout the grid cells from Left to Right (Top to Bottom) with horizontal scroll using GridView.builder, in Flutter

I have set up a GridView.builder to scroll horizontally with 2 rows.
However, I want the grid cells to be built out from Left to Right, Top to Bottom (e.g. the top row would build 1,2,3,4 then the remaining 5,6,7 on the second row.).
I tried a Wrap widget but that doesn't have a scroll function and can't seem to get this working.
final times = [1, 2, 3, 4, 5, 6, 7];
...
SizedBox(
height: size.height * 0.25,
child: GridView.builder(
scrollDirection: Axis.horizontal,
itemCount: times.length,
itemBuilder: (context, index) => Container(
color: Colors.blue,
child: Center(child: Text(times.elementAt(index).toString())),
),
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2, crossAxisSpacing: 6, mainAxisSpacing: 6),
),
),

Change scrollDirection to scrollDirection: Axis.vertical, and update crossAxisCount: 4.
Updated code :
SizedBox(
height: MediaQuery.of(context).size.height / 2,
child: GridView.builder(
scrollDirection: Axis.vertical,
itemCount: 8,
itemBuilder: (context, index) => Container(
color: Colors.blue,
child: SizedBox(child: Center(child: Text("Hey $index"))),
),
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 4, crossAxisSpacing: 6, mainAxisSpacing: 6),
),
),
Result will be -

How to solve the grid view problem in flutter app?

I have a problem of grid view. I add lists as described in 1st screenshot, then the same list will be updated on the another page (as per second screenshot). However, as you can see overflow error, that is happening and I can not solve that. So, can you guys explain how to increase it's height as I add element in the lists. Hope, it is clear.
1st image is here
2nd image is here
Here is a Code:
Consumer<HomeProvider>(
builder: (context, provider, child) => GridView.builder(
physics: const NeverScrollableScrollPhysics(),
shrinkWrap: true,
itemCount: provider.allData.length,
gridDelegate:
SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: provider.isPress ? 2 : 1,
childAspectRatio: 1.4
),
itemBuilder: ((context, index) {
return provider.allData[index];
}))

you can use flutter_staggered_grid_view # package
like this,
StaggeredGrid.count(
crossAxisCount: 2,
crossAxisSpacing: 10,
mainAxisSpacing: 12,
children: [ 'your data' ]
);

GridView crossAxisCount is not having enough room on gridItem. You can change crossAxisCount by increasing height.
childAspectRatio: width/height
Decrease childAspectRatio value like .6 or less

const SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2,
crossAxisSpacing: 20,
mainAxisSpacing: 10,
mainAxisExtent:
110,
)
Try setting mainAxisextent to something more and it will increase the hieght of that current grid element

Just use flutter_staggered_grid_view: ^0.6.2
StaggeredGrid.count(
crossAxisCount: 4,
mainAxisSpacing: 4,
crossAxisSpacing: 4,
children: const [
StaggeredGridTile.count(
crossAxisCellCount: 2,
mainAxisCellCount: 2,
child: Tile(index: 0),
),
StaggeredGridTile.count(
crossAxisCellCount: 2,
mainAxisCellCount: 1,
child: Tile(index: 1),
),
StaggeredGridTile.count(
crossAxisCellCount: 1,
mainAxisCellCount: 1,
child: Tile(index: 2),
),
StaggeredGridTile.count(
crossAxisCellCount: 1,
mainAxisCellCount: 1,
child: Tile(index: 3),
),
StaggeredGridTile.count(
crossAxisCellCount: 4,
mainAxisCellCount: 2,
child: Tile(index: 4),
),
],
);

GridView.count cross-axis spacing too big

I'm trying to create columns of widgets. So, something like
Hello0 Hello1
Hello2 Hello3
When I try
GridView.count(
padding: const EdgeInsets.all(10.0),
crossAxisCount: 2,
crossAxisSpacing: 20,
physics: const NeverScrollableScrollPhysics(),
// mainAxisSpacing: 20,
children: const [
Text('Hello0'),
Text('Hello1'),
Text('Hello2'),
Text('Hello3'),
])
I get the output below
Is there a way to tighten the spacing between the rows or does GridView put everything in a square?

GridView.count calculate its height based on aspect ratio which is 1.0 by default, so its children has extra space.
Instead you can use gridDelegate
GridView(
padding: const EdgeInsets.all(10.0),
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 2,
crossAxisSpacing: 20,
mainAxisExtent: 80,
),
physics: const NeverScrollableScrollPhysics(),
// mainAxisSpacing: 20,
children: const [
Text('Hello1'),
Text('Hello2'),
Text('Hello3'),
])

how to set Container() height which has GridView child?? flutter

i'm trying to make gif pictures gallery.
I wanna wrap gridview with container but container need to setting height.
how can I set Container()'s height relatively??
i wanna make to gridview.items grows, container height grows too.
red line is current container height i set.
Container(
margin: EdgeInsets.only(top: 10),
padding: EdgeInsets.symmetric(horizontal: 10),
height: 1000,
width: double.infinity,
child: GridView.builder(
physics: NeverScrollableScrollPhysics(),
itemCount: 6,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 3,
// childAspectRatio: 3 / 2,
// crossAxisSpacing: 10.0,
// mainAxisSpacing: 10.0,
),
itemBuilder: (context, index) => ChangeNotifierProvider.value(
value: videos[index],
child: VideoGifItem(),
)),
),

If you need your GridView widget to take up space based on the number of items it has.
You can set the shinkWrap property of the GridView widget to true.
I added a demo using your code as an example:
Container(
margin: EdgeInsets.only(top: 10),
padding: EdgeInsets.symmetric(horizontal: 10),
width: double.infinity,
child: GridView.builder(
// set the shrinkWrap property to true
shrinkWrap: true, // new line
physics: NeverScrollableScrollPhysics(),
itemCount: 6,
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 3,
// childAspectRatio: 3 / 2,
// crossAxisSpacing: 10.0,
// mainAxisSpacing: 10.0,
),
itemBuilder: (context, index) => ChangeNotifierProvider.value(
value: videos[index],
child: VideoGifItem(),
),
),
),

How to align text and image in a SliverGrid in Flutter?

I am using the SliverGrid feature to build my gridView. I trying to have the text placed below the image but the text isn't aligning with the image and its showing a Bottom Overflowed error. This is the code:
SliverPadding(
padding: const EdgeInsets.only(left: 8, right: 8),
sliver: SliverGrid(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 3,
crossAxisSpacing: 20,
mainAxisSpacing: 20,
),
delegate: SliverChildBuilderDelegate(
(BuildContext context, int i) {
return GestureDetector(
onTap: () {},
child: Column(
children: <Widget>[
GridTile(
child: Image.network(
'https://images.unsplash.com/photo-1562176566-73c303ac1617?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&w=1000&q=80',
fit: BoxFit.cover,
),
),
Text(
'Sammy the Pup',
style: khomeStyle.copyWith(
color: kOrange, fontSize: 14),
),
],
),
);
},
childCount: 200,
),
),
),
And this is what the gridview looks like(Output of the above):
And this is what I want to achieve:

The height of GridView is determined by the AspectRatio
SliverGridDelegateWithFixedCrossAxisCount(
mainAxisSpacing: 5.0,
crossAxisSpacing: 5.0,
crossAxisCount: 2,
childAspectRatio: 1 / 1,<---
),
As the AspectRatio gets smaller the height gets larger and as the ratio gets larger the heights gets smaller