The basic code snippet which demo a infinite page view

main.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Tutorial by Tran Duc Tam',
      home: MyPage(),
    );
  }
}

class MyPage extends StatefulWidget {
  @override
  MyPageState createState() => MyPageState();
}

class MyPageState extends State<MyPage> {
  late PageController pageController;

  @override
  void initState() {
    super.initState();
    pageController = PageController(
      viewportFraction: 0.8,
      initialPage: 10,
    );
  }

  @override
  Widget build(BuildContext context) {
    List<Widget> items = [
      Container(
        color: Colors.red,
        child: const ListTile(
          leading: Icon(Icons.local_activity, size: 50),
          title: Text('Activity 0'),
          subtitle: Text('Description here'),
        ),
      ),
      Container(
        color: Colors.yellow,
        child: const ListTile(
          leading: Icon(Icons.local_activity, size: 50),
          title: Text('Activity 1'),
          subtitle: Text('Description here'),
        ),
      ),
      Container(
        color: Colors.green,
        child: const ListTile(
          leading: Icon(Icons.local_activity, size: 50),
          title: Text('Activity 2'),
          subtitle: Text('Description here'),
        ),
      ),
      Container(
        color: Colors.pink,
        child: const ListTile(
          leading: Icon(Icons.local_activity, size: 50),
          title: Text('Activity 3'),
          subtitle: Text('Description here'),
        ),
      ),
      Container(
        color: Colors.blue,
        child: const ListTile(
          leading: Icon(Icons.local_activity, size: 50),
          title: Text('Activity 4'),
          subtitle: Text('Description here'),
        ),
      ),
    ];

    return Scaffold(
      appBar: AppBar(
        title: const Text('Flutter Tutorial by Tran Duc Tam'),
      ),
      body: PageView.builder(
        itemCount: null,
        reverse: false,
        pageSnapping: true,
        controller: pageController,
        onPageChanged: (index) {
          print('Index changed: $index');
          if (index == 5) {
            pageController.jumpToPage(10);
          }
        },
        scrollDirection: Axis.horizontal,
        itemBuilder: (BuildContext context, int index) {
          print('Index: $index');
          final int idx = index % items.length;
          return AnimatedBuilder(
            animation: pageController,
            child: items[idx],
            builder: (BuildContext context, child) {
              return Container(child: child);
            },
          );
        },
      ),
    );
  }
}