Syed-Waleed-Shah/infinite_scroll

Infinite Scroll

This package provides InfiniteScrollList and InfiniteScrollGrid widgets to display lists or grids as infinite scrolling views. You can make API calls during the loading state of the list or grid. Please refer to the example project to learn how you can use these widgets in your app.

InfiniteScrollList	InfiniteScrollGrid
https://media.giphy.com/media/i5baioybViEnlIWV5e/giphy.gif	https://media.giphy.com/media/pfuZU95rWaKeIGCx84/giphy.gif
Created By Syed Waleed Shah
Please Contribute Github Repository

Features

• Build your list or grid on demand.
• Show default or your own custom loading indicator during loading of new data.
• Make API calls within onStartLoading(int) callback.

Examples

🔥 You can also refer to this example project

InfiniteScrollList

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

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

  @override
  State<ListExample> createState() => _ListExampleState();
}

class _ListExampleState extends State<ListExample> {
  Future<List<String>> getNextPageData(int page) async {
    await Future.delayed(const Duration(seconds: 2));
    if (page == 3) return [];
    final items = List<String>.generate(14, (i) => "Item $i Page $page");
    return items;
  }

  List<String> data = [];
  bool everyThingLoaded = false;

  @override
  void initState() {
    super.initState();

    loadInitialData();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('🔥 List Example')),
      body: InfiniteScrollList(
        physics: const BouncingScrollPhysics(),
        shrinkWrap: true,
        children: data.map((e) => ListItem(text: e)).toList(),
        onLoadingStart: (page) async {
          List<String> newData = await getNextPageData(page);
          setState(() {
            data += newData;
            if (newData.isEmpty) {
              everyThingLoaded = true;
            }
          });
        },
        everythingLoaded: everyThingLoaded,
      ),
    );
  }

  Future<void> loadInitialData() async {
    data = await getNextPageData(0);
    setState(() {});
  }
}

class ListItem extends StatelessWidget {
  final String text;
  const ListItem({
    Key? key,
    required this.text,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.all(10),
      margin: const EdgeInsets.symmetric(horizontal: 10, vertical: 5),
      decoration: BoxDecoration(
        color: Theme.of(context).primaryColor.withOpacity(.3),
        borderRadius: BorderRadius.circular(15),
      ),
      child: Row(
        children: [
          const CircleAvatar(
            child: Icon(Icons.image),
          ),
          const SizedBox(width: 10),
          Text(
            text,
            style: Theme.of(context).textTheme.bodyText1,
          ),
        ],
      ),
    );
  }
}

InfiniteScrollGrid

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

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

  @override
  State<GridExample> createState() => _GridExampleState();
}

class _GridExampleState extends State<GridExample> {
  Future<List<String>> getNextPageData(int page) async {
    await Future.delayed(const Duration(seconds: 2));
    if (page == 3) return [];
    final items = List<String>.generate(20, (i) => "Item $i Page $page");
    return items;
  }

  List<String> data = [];
  bool everyThingLoaded = false;

  @override
  void initState() {
    super.initState();

    loadInitialData();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('🔥 Grid Example')),
      body: InfiniteScrollGrid(
        physics: const BouncingScrollPhysics(),
        padding: const EdgeInsets.all(10),
        crossAxisSpacing: 10,
        mainAxisSpacing: 10,
        children: data
            .map(
              (e) => GridItem(text: e),
            )
            .toList(),
        onLoadingStart: (page) async {
          List<String> newData = await getNextPageData(page);
          setState(() {
            data += newData;
            if (newData.isEmpty) {
              everyThingLoaded = true;
            }
          });
        },
        everythingLoaded: everyThingLoaded,
        crossAxisCount: 3,
      ),
    );
  }

  Future<void> loadInitialData() async {
    data = await getNextPageData(0);
    setState(() {});
  }
}

class GridItem extends StatelessWidget {
  final String text;
  const GridItem({Key? key, required this.text}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
        padding: const EdgeInsets.all(10),
        alignment: Alignment.center,
        decoration: BoxDecoration(
            color: Theme.of(context).primaryColor.withOpacity(.3),
            borderRadius: BorderRadius.circular(10)),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceAround,
          children: [
            const CircleAvatar(
              child: Icon(Icons.image),
            ),
            Text(
              text,
              style: Theme.of(context).textTheme.bodyText1,
              textAlign: TextAlign.center,
            ),
          ],
        ));
  }
}