flutter_infinite_scroll_main_2.dart

Future<void> fetchPhotos() async {
    try {
      final response = await http.get(
          "https://jsonplaceholder.typicode.com/photos?_page=$_pageNumber");
      List<Photo> fetchedPhotos = Photo.parseList(json.decode(response.body));
      setState(() {
        _hasMore = fetchedPhotos.length == _defaultPhotosPerPageCount;
        _loading = false;
        _pageNumber = _pageNumber + 1;
        _photos.addAll(fetchedPhotos);
      });
    } catch (e) {
      setState(() {
        _loading = false;
        _error = true;
      });
    }
  }
}
class Photo {
  final String title;
  final String thumbnailUrl;
Photo(this.title, this.thumbnailUrl);
factory Photo.fromJson(Map<String, dynamic> json) {
    return Photo(json["title"], json["thumbnailUrl"]);
  }
static List<Photo> parseList(List<dynamic> list) {
    return list.map((i) => Photo.fromJson(i)).toList();
  }
}