Downloading failed always using flutter downloader package

Question

I tried to download pdf files from firebase storage using flutter downloader package. But download always shows failed.I dont know what is the reason.

This is the code I tried. Please suggest some solutions.Thanks in advance.

void _startDownload(String link) async
{
   var dir = await getExternalStorageDirectory();
   try{
      final taskId = await FlutterDownloader.enqueue(
      url: link,
      savedDir:  dir.path,
      fileName:"sampe.docx",
      showNotification: true, // show download progress in status bar(forAndroid)
      openFileFromNotification: true, // click on notification to open downloaded file (for Android)
      );
      debugPrint(taskId);

   //   FlutterDownloader.retry(taskId: taskId);
  }
  catch(e){
     print(e);
  }
}

This is the error I received .

W/System.err(18012): java.io.FileNotFoundException: /storage/emulated/0/sampe.docx (Permission denied)
W/System.err(18012):    at java.io.FileOutputStream.open(Native Method)
W/System.err(18012):    at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
W/System.err(18012):    at java.io.FileOutputStream.<init>(FileOutputStream.java:140)
W/System.err(18012):    at vn.hunghd.flutterdownloader.DownloadWorker.downloadFile(DownloadWorker.java:190)
W/System.err(18012):    at vn.hunghd.flutterdownloader.DownloadWorker.doWork(DownloadWorker.java:102)
W/System.err(18012):    at androidx.work.Worker$1.run(Worker.java:57)
W/System.err(18012):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
W/System.err(18012):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
W/System.err(18012):    at java.lang.Thread.run(Thread.java:760)
I/WorkerWrapper(18012): Worker result SUCCESS for Work [ id=b7676538-a655-454a-89e2-1899f0e078cd, tags={ vn.hunghd.flutterdownloader.DownloadWorker, flutter_download_task } ]

yeah I gave the permission to external storage This is the error message. — deepan
– deepan, Commented Feb 13, 2019 at 6:17

Sondagar Divyas · Accepted Answer · 2022-09-16 06:46:12Z

1

make sure your file name is different because same file name not allow to store

void download(String url) async {
    final status = await Permission.storage.request();

    if (status.isGranted) {
     

      final id = await FlutterDownloader.enqueue(
        url: url,
        savedDir: "/storage/emulated/0/Download",
        showNotification: true,
        openFileFromNotification: true,
  fileName: DateTime.now().millisecond.toString().replaceAll(" ", ""),

      ).then((value) {
        print("complated");
      });
    } else {
      setState(() {
       print("faild");
      });
      print('Permission Denied');
    }
  }

edited Sep 16, 2022 at 6:46

answered Sep 16, 2022 at 6:42

Sondagar Divyas

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Comments

brayson_john · Accepted Answer · 2019-10-26 22:59:10Z

0

make sure you have a write permision. Not read, write permision

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

answered Oct 26, 2019 at 22:59

brayson_john

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Comments

Phuhui · Accepted Answer · 2020-12-21 21:03:07Z

0

Try adding android:requestLegacyExternalStorage="true" to the flutter_downloader provider in android/app/src/main/AndroidManifest.xml like:

<provider
        android:name="vn.hunghd.flutterdownloader.DownloadedFileProvider"
        android:authorities="im.mingguang.mingguang_app.flutter_downloader.provider"
        android:exported="false"
        android:grantUriPermissions="true"
        android:requestLegacyExternalStorage="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/provider_paths"/>
</provider>

answered Dec 21, 2020 at 21:03

Phuhui

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1 Comment

Alex Aung Over a year ago

May I know why do we need to add this flag?

Pravin paliwal · Accepted Answer · 2021-05-13 14:04:50Z

0

//Check permission first need check permission
  Future<bool> _checkPermission() async {
if (platform == TargetPlatform.android) {
  final status = await Permission.storage.status;
  if (status != PermissionStatus.granted) {
    final result = await Permission.storage.request();
    if (result == PermissionStatus.granted) {
      return true;
    }
  } else {
    return true;
  }
} else {
  return true;
}
return false;
}
// user_permission code for mainfest
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

edited May 13, 2021 at 14:04

answered May 13, 2021 at 13:39

Pravin paliwal

112 bronze badges

Comments

Jeevan Koiri · Accepted Answer · 2023-04-29 03:24:46Z

You can use this method to easily download any material by providing a URL.

downloadStartMethodUsingFlutterDownloader(controller, uri) async {
print("URI: $uri");
final taskId = await FlutterDownloader.enqueue(
  url: uri.url.toString(),
  savedDir: (await getExternalStorageDirectory())!.path,

  // allowCellular: true,
  fileName: uri.url.pathSegments.last.toString(),
  showNotification:
      true, // show download progress in status bar (for Android)
  openFileFromNotification:
      true, // click on notification to open downloaded file (for Android)
  allowCellular: true,
);

}

You can call it as:

Widget build(BuildContext context) {
return Scaffold(
  appBar: AppBar(
    title: Text('Testing the downloading'),
  ),
  body: InAppWebView(
    initialOptions: InAppWebViewGroupOptions(
      crossPlatform: InAppWebViewOptions(useOnDownloadStart: true),
    ),
    initialUrlRequest: URLRequest(url: Your_URL_HERE),

    // new from stackoverflow
    onDownloadStartRequest: downloadStartMethodUsingFlutterDownloader,
  ),
);

}

These are the imports that are required:

import 'package:flutter_downloader/flutter_downloader.dart';
import 'package:path_provider/path_provider.dart';
import 'package:flutter_inappwebview/flutter_inappwebview.dart';

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