在 Flutter 的 GridView 中显示图像？

Question

我想在 GridView 中显示图像列表。而我无法做到这一点。我想知道资产中图像列表的数据类型以及在这种情况下构造函数将如何提供帮助。刚开始学flutter，不知道怎么用。

class Home extends StatefulWidget {
  final String title;
  Home({this.title}) : super();
  @override
  _HomeState createState() => _HomeState();
  }
  @override
  Widget build(BuildContext context) {
var gridView = new GridView.builder(
    itemCount: 20,
    gridDelegate:
        new SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 3),
    itemBuilder: (BuildContext context, int index) {
      return new GestureDetector(
        child: new Card(
          elevation: 10,
          child: new Container(
                // child: *Image list as child*, but don't know about the list datatype hence not created it!
            alignment: Alignment.center,
          ),
        ),
        onTap: () {},
      );
    });
return new Scaffold(
  appBar: new AppBar(
    backgroundColor: Colors.red,
    title: new Text("Flutter TabBar"),
  ),
  body: Container(
    padding: EdgeInsets.all(10),
    child: gridView,
  ),
);
}
}

Answer 1

GestureDetector(
        child: new Card(
          elevation: 10,
          child: new Container(
            // child: *Image list as child*, but don't know about the list datatype hence not created it!
            alignment: Alignment.center,
            child:GridView.builder(
            itemCount: items.length,
            gridDelegate:

            // crossAxisCount stands for number of columns you want for displaying
            SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 3),
            itemBuilder: (BuildContext context, int index) {

              // return your grid widget here, like how your images will be displayed
              return Image.network('https://picsum.photos/250?image=9',);
              }),
           ),
        ),
        onTap: () {},
      )