How to do a GridView with two crossAxisCount in Flutter? - flutter

Question

This is the example of expected output
For the first row, the crossAxisCount will be 3 and the second row, the crossAxisCount will be 2.
GridView.builder(
physics: NeverScrollableScrollPhysics(),
gridDelegate: new SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 3,
childAspectRatio: 0.75,
mainAxisSpacing: 2.0,
crossAxisSpacing: 1.0,
),
itemCount: int.parse(snapshot.data.result[num].collected),
itemBuilder:
(BuildContext context, int i) {
return Image.asset(
'assets/coin.png');
}),

Answer 1

You can set crossAxisCount to 1 and childAspectRatio to number you need, I use 2
In itemBuilder check index is Odd and return Row with 2 or 3 asset icon
You can copy paste run full code below
code snippet
GridView.builder(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 1, childAspectRatio: 2),
itemCount: _icons.length,
itemBuilder: (context, index) {
if (index.isOdd) {
return Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Container(
child: Image.asset('assets/coin.png'),
),
Container(
child: Image.asset('assets/coin.png'),
),
Container(
child: Image.asset('assets/coin.png'),
),
],
);
} else {
working demo
full code
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Expanded(flex: 1, child: InfiniteGridView()),
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.display1,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}
class InfiniteGridView extends StatefulWidget {
#override
_InfiniteGridViewState createState() => new _InfiniteGridViewState();
}
class _InfiniteGridViewState extends State<InfiniteGridView> {
List<IconData> _icons = [];
#override
void initState() {
_retrieveIcons();
}
#override
Widget build(BuildContext context) {
return GridView.builder(
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 1, childAspectRatio: 2),
itemCount: _icons.length,
itemBuilder: (context, index) {
if (index.isOdd) {
return Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Container(
child: Image.asset('assets/coin.png'),
),
Container(
child: Image.asset('assets/coin.png'),
),
Container(
child: Image.asset('assets/coin.png'),
),
],
);
} else {
return Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Container(
child: Image.asset('assets/coin.png'),
),
Container(
child: Image.asset('assets/coin.png'),
),
],
);
}
});
}
void _retrieveIcons() {
Future.delayed(Duration(milliseconds: 200)).then((e) {
setState(() {
_icons.addAll([
Icons.ac_unit,
Icons.airport_shuttle,
Icons.all_inclusive,
Icons.beach_access,
Icons.cake,
Icons.free_breakfast
]);
});
});
}
}