al_downloader 1.6.8

A URL-based flutter downloader that supports to download any type of file and automatically manages a lot of things.

al_downloader

A URL-based flutter downloader that supports to download any type of file and automatically manages a lot of things.

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Features

• manage download tasks by url
• simple download status
• I/O infrequently
• provide convenient download handle
• support batch download
• manage automatically files without requiring to be specified a download path
• based on flutter_downloader

Integration

Native Config: same as flutter_downloader native config

add the following line to your pubspec.yaml

dependencies:
  al_downloader: ^1.6.8

run the following line with your command line

flutter packages get

import the following line, then you can use al_downloader

import 'package:al_downloader/al_downloader.dart';

Usage

ALDownloader

/// Download
await ALDownloader.download(url,
    downloaderHandlerInterface:
        ALDownloaderHandlerInterface(progressHandler: (progress) {
      debugPrint(
          "ALDownloader | download progress = $progress, url = $url\n");
    }, succeededHandler: () {
      debugPrint("ALDownloader | download succeeded, url = $url\n");
    }, failedHandler: () {
      debugPrint("ALDownloader | download failed, url = $url\n");
    }, pausedHandler: () {
      debugPrint("ALDownloader | download paused, url = $url\n");
    }));

/// Add a downloader handler interface
ALDownloader.addDownloaderHandlerInterface(
    ALDownloaderHandlerInterface(progressHandler: (progress) {
      debugPrint(
          "ALDownloader | download progress = $progress, url = $url\n");
    }, succeededHandler: () {
      debugPrint("ALDownloader | download succeeded, url = $url\n");
    }, failedHandler: () {
      debugPrint("ALDownloader | download failed, url = $url\n");
    }, pausedHandler: () {
      debugPrint("ALDownloader | download paused, url = $url\n");
    }),
    url);

/// Add a forever downloader handler interface
ALDownloader.addForeverDownloaderHandlerInterface(
    ALDownloaderHandlerInterface(progressHandler: (progress) {
      debugPrint(
          "ALDownloader | download progress = $progress, url = $url\n");
    }, succeededHandler: () {
      debugPrint("ALDownloader | download succeeded, url = $url\n");
    }, failedHandler: () {
      debugPrint("ALDownloader | download failed, url = $url\n");
    }, pausedHandler: () {
      debugPrint("ALDownloader | download paused, url = $url\n");
    }),
    url);

/// Remove downloader handler interface
ALDownloader.removeDownloaderHandlerInterfaceForUrl(url);

/// Get download status
final status = ALDownloader.getStatusForUrl(url);

/// Get download progress
final progress = ALDownloader.getProgressForUrl(url);

/// Pause download
///
/// Stop download, but the incomplete data will not be deleted.
await ALDownloader.pause(url);

/// Cancel download
///
/// Stop download, and the incomplete data will be deleted.
await ALDownloader.cancel(url);

/// Remove download
///
/// Remove download, and all the data will be deleted.
await ALDownloader.remove(url);

ALDownloaderBatcher

/// Batch download
await ALDownloaderBatcher.downloadUrls(urls,
    downloaderHandlerInterface:
        ALDownloaderHandlerInterface(progressHandler: (progress) {
      debugPrint("ALDownloader | batch | download progress = $progress\n");
    }, succeededHandler: () {
      debugPrint("ALDownloader | batch | download succeeded\n");
    }, failedHandler: () {
      debugPrint("ALDownloader | batch | download failed\n");
    }, pausedHandler: () {
      debugPrint("ALDownloader | batch | download paused\n");
    }));

/// Add a downloader handler interface for batch
ALDownloaderBatcher.addDownloaderHandlerInterface(
    ALDownloaderHandlerInterface(progressHandler: (progress) {
      debugPrint("ALDownloader | batch | download progress = $progress\n");
    }, succeededHandler: () {
      debugPrint("ALDownloader | batch | download succeeded\n");
    }, failedHandler: () {
      debugPrint("ALDownloader | batch | download failed\n");
    }, pausedHandler: () {
      debugPrint("ALDownloader | batch | download paused\n");
    }),
    urls);

/// Get download status for a set of urls
final status = ALDownloaderBatcher.getStatusForUrls(urls);

ALDownloaderPersistentFileManager - A manager that manages persistent file by url

final model = await ALDownloaderPersistentFileManager
    .lazyGetALDownloaderPathModelForUrl(url);
debugPrint(
    "ALDownloader | get 'physical directory path' and 'virtual/physical file name' of the file for [url], url = $url, model = $model\n");

final path2 = await ALDownloaderPersistentFileManager
    .lazyGetAbsolutePathOfDirectoryForUrl(url);
debugPrint(
    "ALDownloader | get 'physical directory path' for [url], url = $url, path = $path2\n");

final path3 = await ALDownloaderPersistentFileManager
    .getAbsoluteVirtualPathOfFileForUrl(url);
debugPrint(
    "ALDownloader | get 'virtual file path' for [url], url = $url, path = $path3\n");

final path4 = await ALDownloaderPersistentFileManager
    .getAbsolutePhysicalPathOfFileForUrl(url);
debugPrint(
    "ALDownloader | get 'physical file path' for [url], url = $url, path = $path4\n");

final isExist = await ALDownloaderPersistentFileManager
    .isExistAbsolutePhysicalPathOfFileForUrl(url);
debugPrint(
    "ALDownloader | check whether [url] exists a 'physical file path', url = $url, is Exist = $isExist\n");

final fileName = ALDownloaderPersistentFileManager.getFileNameForUrl(url);
debugPrint(
    "ALDownloader | get 'virtual/physical file name' for [url], url = $url, file name = $fileName\n");

ALDownloaderPrintConfig

/// Enable print
ALDownloaderPrintConfig.enabled = true;

/// Disable frequent print
ALDownloaderPrintConfig.frequentEnabled = false;

Note:

1. Method needs to add qualifier await when executing in a coroutine.

For example that

Future<void> executeSomeMethodsTogetherSerially() async {
  await ALDownloader.initialize();
  await ALDownloader.remove(url);
  await ALDownloader.download(url);
}

2. If the persistent file was removed by exceptional means, such as the cache folder being deleted by some business code, call [remove] and then call [download] to re-download for fixing the problem.

Key File Of Example

iOS

• main.dart
• AppDelegate.swift
• Info.plist

Android

• main.dart
• AndroidManifest.xml

Maintainer: jackleemeta ([e-mail])