页面传递参数

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第一个页面：

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class Page extends StatelessWidget {
  final String title;

  Page({this.title});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(title),
        elevation: 0.0,
      ),
      body: BlogSheet(title: title),
    );
  }
}

第二个页面

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class BlogSheet extends StatefulWidget {
  BlogSheet({Key key, this.title}) : super(key: key);
  final String title;

  @override
  _BlogSheetState createState() => _BlogSheetState();
}

class _BlogSheetState extends State<BlogSheet> {
  List bloglists;

  @override
  void initState() {
    super.initState();

    getData(type: 'api', category: widget.title);
  }

  Future getData({String type = 'api', String category = 'PHP'}) async {
    final String url = "http://localhost:8081/$type?category=$category";
    final response = await http.get(url);

    if (response.statusCode == 200) {
      List top = json.decode(response.body);
      setState(() {
        bloglists = top.map((json) => Blog.fromJson(json)).toList();
      });
    } else {
      print("err code $response.statusCode");
    }
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      child: bloglists == null
          ? Center(child: CircularProgressIndicator())
          : Padding(
              padding: EdgeInsets.symmetric(horizontal: 6.0, vertical: 10.0),
              child: ListView.builder(
                itemCount: bloglists.length,
                itemBuilder: (BuildContext context, int index) {
                  return BlogCard(bloglists[index]);
                },
              ),
            ),
    );
  }
}