DigitalAlbum

import 'dart:async';
import 'package:flutter/material.dart';

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

  @override
  State<homeScreen> createState() => _homeScreenState();
}

class _homeScreenState extends State<homeScreen> {
  Timer? timer;
  PageController controller = PageController(initialPage: 0);

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    timer = Timer.periodic(
			Duration(seconds: 3),
			(timer) {
	      int currentPage = controller.page!.toInt();
	      int nextPage = currentPage + 1;

	      if (nextPage > 4) {
	        nextPage = 0;
	      }

	      controller.animateToPage(
	        nextPage,
	        duration: Duration(milliseconds: 400),
	        curve: Curves.linear,
	      );  // controller.animateToPage
			},  // timer
		);  // Timer.peridoic
  }  // initState

  @override
  void dispose() {
    // TODO: implement dispose
    controller.dispose();

    if (timer != null) {
      timer!.cancel();
    }

    super.dispose();
  }  // dispose

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: PageView(
        controller: controller,
        children: [1, 2, 3, 4, 5]
            .map((e) => Image.asset(
                  'asset/img/image_$e.jpeg',
                  fit: BoxFit.cover,
                ))
            .toList(),
      ),  // PageView
    );  // Scaffold
  }  // build
}
Dart
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