isolated_download_manager_flutter 1.0.3

Flutter ready-to-use widgets to simplify usage of isolated_download_manager package

example/main.dart

import 'package:flutter/material.dart';
import 'package:isolated_download_manager_flutter/isolated_download_manager_flutter.dart';
import 'package:isolated_download_manager/isolated_download_manager.dart';
import 'dart:io' show File;

void main() {
  runApp(const ExampleApp());
}

class ExampleApp extends StatefulWidget {
  const ExampleApp({super.key}) : super();

  @override
  State<ExampleApp> createState() => _ExampleAppState();
}

class _ExampleAppState extends State<ExampleApp> {
  static const String url =
      "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4";
  static const String path = "./BigBuckBunny.mp4";

  DownloadRequest? _request;

  @override
  void initState() {
    super.initState();
    DownloadManager.instance.init(isolates: 2);
  }

  @override
  void dispose() {
    DownloadManager.instance.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        home: Scaffold(
            appBar: AppBar(title: const Text("DownloadWidget"), actions: [
              IconButton(
                  onPressed: _reset, icon: const Icon(Icons.replay_rounded))
            ]),
            body: Center(
                child: DownloadWidget(
                    request: _request,
                    builder: (context, state, progress, error) {
                      switch (state) {
                        case DownloadWidgetState.initial:
                          return IconButton(
                              onPressed: _download,
                              icon: const Icon(Icons.download_rounded));
                        case DownloadWidgetState.queued:
                        case DownloadWidgetState.downloading:
                          return Stack(alignment: Alignment.center, children: [
                            CircularProgressIndicator(
                                value: 1.0,
                                color: Colors.grey.withOpacity(0.2)),
                            CircularProgressIndicator(value: progress),
                            IconButton(
                                onPressed: _cancel,
                                icon: const Icon(Icons.close_rounded)),
                          ]);
                        case DownloadWidgetState.failed:
                          return IconButton(
                              onPressed: _download,
                              icon: const Icon(Icons.restart_alt_rounded));
                        case DownloadWidgetState.downloaded:
                          return const Icon(Icons.done_rounded);
                        default:
                          return const SizedBox();
                      }
                    }))));
  }

  void _download() {
    setState(
        () => _request = DownloadManager.instance.download(url, path: path));
  }

  void _cancel() {
    _request?.cancel();
  }

  void _reset() async {
    _cancel();
    setState(() => _request = null);
    final file = File(path);
    if (await file.exists()) await file.delete();
  }
}