import 'package:http/http.dart' as http;

2    import 'dart:convert';

3    

4    void main() {

5      runApp(MyApp());

6    }

7    

8    class MyApp extends StatelessWidget {

9      @override

10      Widget build(BuildContext context) {

11        return MaterialApp(

12          home: MyHomePage(),

13        );

14      }

15    }

16    

17    class MyHomePage extends StatefulWidget {

18      @override

19      _MyHomePageState createState() => _MyHomePageState();

20    }

21    

22    class _MyHomePageState extends State<MyHomePage> {

23      final _scrollController = ScrollController();

24      final _list = <String>[];

25      int _currentPage = 1;

26    

27      @override

28      void initState() {

29        super.initState();

30        _scrollController.addListener(_loadMore);

31        _fetchData(_currentPage);

32      }

33    

34      @override

35      void dispose() {

36        _scrollController.dispose();

37        super.dispose();

38      }

39    

40      Future<void> _fetchData(int pageKey) async {

41        final response = await http.get('https://api.example.com/items?page=$pageKey');

42        if (response.statusCode == 200) {

43          setState(() {

44            _list.addAll(List<String>.from(json.decode(response.body)));

45          });

46        } else {

47          throw Exception('Failed to load data');

48        }

49      }

50    

51      void _loadMore() {

52        if (_scrollController.position.pixels == _scrollController.position.maxScrollExtent) {

53          _currentPage++;

54          _fetchData(_currentPage);

55        }

56      }

57    

58      @override

59      Widget build(BuildContext context) {

60        return Scaffold(

61          appBar: AppBar(

62            title: Text('API Pagination Example'),

63          ),

64          body: ListView.builder(

65            controller: _scrollController,

66            itemCount: _list.length,

67            itemBuilder: (BuildContext context, int index) {

68              return ListTile(

69                title: Text(_list[index]),

70              );

71            },

72          ),

73        );

74      }

75    }

76