How to solve OS Error: Permission denied, errno = 13 in flutter

Question

I want to store my document file into '/storage/emulated/0/Download/'. I got this error :

Unhandled Exception: FileSystemException: Cannot open file, path = '/storage/emulated/0/Download/file.pdf' (OS Error: Permission denied, errno = 13)

Here is my code:

void download() async {
  http.Response response = await http.post(url, headers: {"Accept": "application/json", HttpHeaders.authorizationHeader: 'Bearer'}});
    
  File file = new File('/storage/emulated/0/Download/file.pdf');
  await file.writeAsBytes(response.bodyBytes);
}

score 68 · Answer 1 · answered Jul 21 '20 at 23:12

68

In Android Q, you need to add the Following Lines in AndroidManifest file:

 <application
      android:requestLegacyExternalStorage="true"

answered Jul 21 '20 at 23:12

Rajil TL

1,055
1
10
7

2

is it related to the change of targetSdkVersion 29? – Leonardo Rignanese Dec 26 '20 at 16:05
2

Yes, make sense. If your `targetSdkVersion` is 28, don't need this line. If tour `targetSdkVersion` is 29 or more, need this line – Matias de Andrea May 15 '21 at 10:31
2

After adding this, if you get `error: attribute android:requestLegacyExternalStorage not found`, check [this answer](https://stackoverflow.com/a/59003853/3291390). Specifically, make sure you have `compileSdkVersion = 29` in android/app/build.gradle – Stack Underflow May 20 '21 at 19:24

score 28 · Answer 2 · answered Feb 20 '21 at 22:00

28

Just add the following lines in to your android manifest if you're on android 10/Q

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
   <application
        android:requestLegacyExternalStorage="true"
    >

answered Feb 20 '21 at 22:00

Charith Jayasanka

4,033
31
42

2

This work for me... Thank. I put `android:requestLegacyExternalStorage="true"` it work fine now – Grafritz Design Apr 07 '21 at 19:48
Yes this applies only after android 10Q – Charith Jayasanka Apr 08 '21 at 07:54

score 24 · Answer 3 · answered May 25 '20 at 04:47

I had the same problem

My solve:

use permission_handler

import 'package:permission_handler/permission_handler.dart';

before download action you need check storage permission:

var status = await Permission.storage.status;
                  if (!status.isGranted) {
                    await Permission.storage.request();
                  }

hope to help some body

Aamil Silawat · Accepted Answer · 2020-03-06T10:09:49.683

16

Make sure you defined permissions in AndroidManifest file like this :

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.xxx.yyy">
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
...
</manifest>

for more info try out this link

edited Mar 06 '20 at 10:09

answered Mar 06 '20 at 06:24

Aamil Silawat

7,735
3
19
37

1

thank you for your reply, I already put these permission but still have error – qing Mar 06 '20 at 06:26
@qing are you running this code in real device or emulator? – Aamil Silawat Mar 06 '20 at 06:27
run in real device – qing Mar 06 '20 at 06:28
1

So go to the setting/apps and check your application's permissions too in your real device – Aamil Silawat Mar 06 '20 at 06:30
did you check the attached link in my answer? – Aamil Silawat Mar 06 '20 at 06:35
after I refer the link I get the error > Minimum supported Gradle version is 5.4.1. Current version is 4.10.2. If using the gradle wrapper, try editing the distributionUrl in C:\flutter\.pub-cache\hosted\pub.dartlang.org\connectivity_macos-0.1.0+1\android\gradle\wrapper\gradle-wrapper.properties to gradle-5.4.1-all.zip BUILD FAILED in 2s The plugin connectivity_macos could not be built due to the issue above. – qing Mar 06 '20 at 09:28
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/209137/discussion-between-a-r-and-qing). – Aamil Silawat Mar 06 '20 at 09:31

score 5 · Answer 5 · answered Oct 11 '20 at 19:52

5

In addition to Rajil TL's answer also include

targetSdkVersion 28

and stop process and run the app. Hot reload is not enough to reflect build.gradle changes.

answered Oct 11 '20 at 19:52

Amal Paul

201
3
5

score 3 · Answer 6 · answered Jul 03 '21 at 11:03

3

In my cases none of the solutions worked, finally what worked was to remove from android/app/build.gradle the reference to "targetSdkVersion XX" inside defaultConfig{}

Now everything works as expected, I guess it is a bug in the framework.

answered Jul 03 '21 at 11:03

Daniel

1,007
1
11
23

score 2 · Answer 7 · answered Aug 03 '21 at 13:55

2

You have to add android:requestLegacyExternalStorage="true" this in AndroidManifest.xml file.

<application 
android:label="app_name"
        android:icon="@mipmap/ic_launcher"
        android:requestLegacyExternalStorage="true"
 </application>

answered Aug 03 '21 at 13:55

Singh Manish

29
1

score 1 · Answer 8 · answered Jan 13 '21 at 04:03

1

Just change the targetSdkVersion to 28 from the build.gradle file. Rebuild app and run, it's working fine.

answered Jan 13 '21 at 04:03

malware_656

135
5
8

score 0 · Answer 9 · edited Mar 10 '23 at 18:23

0

I faced this issue with a Galaxy S9. I couldn't use the last used pictures - I had to click on the gallery and photos tab in the top, the app asked for permission again, and then it worked.

edited Mar 10 '23 at 18:23

PacifismPostMortem

105
1
4
9

answered May 02 '21 at 17:44

MHappersberger

81
2
5

score 0 · Answer 10 · answered Feb 26 '23 at 14:30

My case was that it was possible to access directory. but couldn't read file.

final path= "${await ExternalPath.getExternalStoragePublicDirectory(ExternalPath.DIRECTORY_DOCUMENTS)}/sub";
final dir= Directory(path);
final l = dir.listSync(); // 1. works fine until here
for( final d in l){
   try{
      final  str = await File("${d.path}/info.json").readAsString(); // 2. permission error here
   }catch(e){
     print(e);
   }
}

for solving this problem, I included android.permission.MANAGE_EXTERNAL_STORAGE permission.

like belows.

<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<application
     android:requestLegacyExternalStorage="true"

Ramkesh Yadav · Answer 11 · 2023-03-27T14:45:48.347

After long Research i find this Solution and it will work on all Android 10+

Just change await Permission.storage.request() to await Permission.manageExternalStorage.request() in your Permission Handler or Requester class.

Because this change will give you full access to Media Storage excluding Restricted Storage.

Detail Example:

First Create a method.

Future<AppPermissionStatus> askForPhotoGalleryPermission(
  BuildContext context) async {
var status = Platform.isIOS
    ? await Permission.photos.request()
    : await Permission.manageExternalStorage.request(); 
AppPermissionStatus permissionStatus = AppPermissionStatus.NotAvailable;

if (status.isGranted) {
  permissionStatus = AppPermissionStatus.Granted;
  return permissionStatus;
} else if (status.isDenied) {
  permissionStatus = AppPermissionStatus.Denied;
  return permissionStatus;
} else if (status.isRestricted) {
  permissionStatus = AppPermissionStatus.Restricted;
  return permissionStatus;
} else if (status.isPermanentlyDenied) {
  permissionStatus = AppPermissionStatus.PermanentlyDenied;
}
return permissionStatus;
}

How to call this Method.

 void getRequiredPermission(BuildContext context) async {
 AppPermissionStatus permissionStatus =
    await AppPermission().askForPhotoGalleryPermission(context);
  setState(() {
  if (permissionStatus == AppPermissionStatus.Granted) {
    hasPermission = true;
  } else if (permissionStatus == AppPermissionStatus.PermanentlyDenied) {
    hasPermission = false;
  } else {
    hasPermission = false;
  }
});
}

How to solve OS Error: Permission denied, errno = 13 in flutter

11 Answers11

Linked