@pragma('vm:entry-point')
void requestEnqueue() async {
  WidgetsFlutterBinding.ensureInitialized();
  const backgroundChannel = MethodChannel('vn.hunghd/downloader_enqueue');
  await backgroundChannel.invokeMethod<void>('requestEnqueue');
}

import 'package:flutter_downloader/flutter_downloader.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();

  // Plugin must be initialized before using
  await FlutterDownloader.initialize(
    debug: true, // optional: set to false to disable printing logs to console (default: true)
    ignoreSsl: true // option: set to false to disable working with http links (default: false)
  );

  runApp(/*...*/)
}

final taskId = await FlutterDownloader.enqueue(
  url: 'your download link',
  headers: {}, // optional: header send with url (auth token etc)
  savedDir: 'the path of directory where you want to save downloaded files',
  showNotification: true, // show download progress in status bar (for Android)
  openFileFromNotification: true, // click on notification to open downloaded file (for Android)
);

void updateTaskState(String taskId, int status, int progress) {
  print(
    'task ($taskId) is in status ($status) and process ($progress)',
  );
}

void setupProgressCallback() {
  FlutterDownloader.registerCallback(updateTaskState, step: 1);
}

final List<DownloadTask>? tasks = await FlutterDownloader.loadTasks();

final List<DownloadTask>? tasks = await FlutterDownloader.loadTasksWithRawQuery(query: query);

SELECT * FROM task WHERE status=3

CREATE TABLE `task` (
  `id`  INTEGER PRIMARY KEY AUTOINCREMENT,
  `task_id` VARCHAR ( 256 ),
  `url` TEXT,
  `status`  INTEGER DEFAULT 0,
  `progress`  INTEGER DEFAULT 0,
  `file_name` TEXT,
  `saved_dir` TEXT,
  `resumable` TINYINT DEFAULT 0,
  `headers` TEXT,
  `show_notification` TINYINT DEFAULT 0,
  `open_file_from_notification` TINYINT DEFAULT 0,
  `time_created`  INTEGER DEFAULT 0
);

FlutterDownloader.cancel(taskId: taskId);

FlutterDownloader.cancelAll();

FlutterDownloader.pause(taskId: taskId);

FlutterDownloader.resume(taskId: taskId);

FlutterDownloader.retry(taskId: taskId);

FlutterDownloader.remove(taskId: taskId, shouldDeleteContent:false);

FlutterDownloader.open(taskId: taskId);