Flutter Staggered grid view :
Flutter Staggered grid view supports multiple columns with different row sizes.
In this blog, we will look to design a page with the different column count at the different row.
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Different Column Count At Different Row
StaggeredTileBuilder is used to create different no of the column in row and height of each tile.
There are three types of staggered tile, StaggeredTile.count , StaggeredTile.fit StaggeredTile.extent .
We will use StaggeredTile.extent(this.crossAxisCellCount, this.mainAxisExtent).
Where crossAxisCellCount is the number of column in a row and mainAxisExtent is the height of row item/tile.
Here, we will show the 1,2,3 column count on different rows.
Calculation of crossAxisCellCount
Let’s calculate crossAxisCellCount
SingleColumn crossAxisCellCount = 1*2*3=6/1 =6
TwoColumnGrid crossAxisCellCount = 1*2*3=6/2 =3
ThreeColumnGrid crossAxisCellCount = 1*2*3=6/3 =2
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staggeredTileBuilder: (int index) { if (listData[index].itemViewType == "TwoColumnGrid") { return new StaggeredTile.extent( 3, (1 / 2) * MediaQuery.of(context).size.width); } else if (listData[index].itemViewType == "ThreeColumnGrid") { return new StaggeredTile.extent( 2, (1 / 3) * MediaQuery.of(context).size.width); } else { return new StaggeredTile.extent( 6, (1 / 2) * MediaQuery.of(context).size.width); } }); |
We will get the result as attached image
Staggered grid view example:
Let’s check the complete code.
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class _HomePageState extends State<MyHomePage> { List<HomePageItems> listData = []; @override void initState() { super.initState(); listData.add(HomePageItems(itemViewType: "SingleColumn")); listData.add(HomePageItems(itemViewType: "TwoColumnGrid")); listData.add(HomePageItems(itemViewType: "TwoColumnGrid")); listData.add(HomePageItems(itemViewType: "TwoColumnGrid")); listData.add(HomePageItems(itemViewType: "TwoColumnGrid")); listData.add(HomePageItems(itemViewType: "ThreeColumnGrid")); listData.add(HomePageItems(itemViewType: "ThreeColumnGrid")); listData.add(HomePageItems(itemViewType: "ThreeColumnGrid")); listData.add(HomePageItems(itemViewType: "ThreeColumnGrid")); listData.add(HomePageItems(itemViewType: "ThreeColumnGrid")); listData.add(HomePageItems(itemViewType: "ThreeColumnGrid")); } @override Widget build(BuildContext context) { return StaggeredGridView.countBuilder( crossAxisCount: 6, shrinkWrap: true, itemCount: listData.length, itemBuilder: (BuildContext context, int index) { switch (listData[index].itemViewType) { case 'TwoColumnGrid': { return Container( color: Colors.blue, margin: EdgeInsets.all(4), ); } break; case 'ThreeColumnGrid': { return Container( color: Colors.yellow, margin: EdgeInsets.all(4), ); } break; default: { return Container( color: Colors.red, margin: EdgeInsets.all(4), ); } break; } }, staggeredTileBuilder: (int index) { if (listData[index].itemViewType == "TwoColumnGrid") { return new StaggeredTile.extent( 3, (1 / 2) * MediaQuery.of(context).size.width); } else if (listData[index].itemViewType == "ThreeColumnGrid") { return new StaggeredTile.extent( 2, (1 / 3) * MediaQuery.of(context).size.width); } else { return new StaggeredTile.extent( 6, (1 / 2) * MediaQuery.of(context).size.width); } }); } } |
I hope this blog will help to make the different number of columns in different rows.
Happy Learning 🙂
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