Easy Infinite Scroll in ListView Flutter

file.dart

					import 'package:flutter/material.dart';
					import '../../../../utils/app_asset.dart';
					import '../../../../utils/app_style.dart';

					class Bill extends StatefulWidget {
					  const Bill({Key? key}) : super(key: key);

					  @override
					  State<Bill> createState() => _BillState();
					}

					class _BillState extends State<Bill> {
					  late bool _isLoading;

					  @override
					  void initState() {
						_isLoading = false;
						super.initState();
					  }

					  List<int> _list = [
						1,
						2,
						3,
						4,
						5,
						6,
						7,
						8,
						9,
						10,
					  ];
					  @override
					  Widget build(BuildContext context) {
						return NotificationListener<ScrollNotification>(
							onNotification: (ScrollNotification notification) {
							  if (notification.metrics.pixels ==
								  notification.metrics.maxScrollExtent) {
								print('Reached Bottom');
								setState(() => _isLoading = true);
								_getData();
							  }
							  return true;
							},
							child: ListView.builder(
								itemCount: _list.length + 1,
								shrinkWrap: true,
								itemBuilder: (BuildContext context, index) {
								  return index < _list.length
									  ? Card(
										  child: Padding(
										  padding: const EdgeInsets.all(28.0),
										  child: Text(
											"We are Checking Infinite Scrolling " +
												_list[index].toString() +
												"_________________________________________________________________________________________  INDEX : \n" +
												index.toString(),
											style: TextStyle(
											  fontSize: 15,
											),
										  ),
										))
									  : Center(
										  child: Opacity(
										  opacity: _isLoading ? 1.0 : 0.0,
										  child: const SizedBox(
											  width: 32.0,
											  height: 32.0,
											  child: CircularProgressIndicator()),
										));
								}));
					  }

					  void _getData() {
						_list.addAll([
						  01,
						  02,
						  03,
						  04,
						]);
						Future.delayed(const Duration(seconds: 2), () {
						  setState(() => _isLoading = false);
						});
					  }
					}