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

user_10984860 0
Viewed 38842

I am new in Flutter. I want to store my document file into '/storage/emulated/0/Download/'. I have error about 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);
}
flutter
9 Answers

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

 <application
      android:requestLegacyExternalStorage="true"
user_51752150

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

user_105217600

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"
    >
user_87096030

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

user_114048830

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.

user_71255110

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.

user_83770180

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

user_91162910

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>
user_120622500

I faced this issue at a Galaxy s9. I couldnt use the last used pictures - I had to click on the galary and fotos tab in the top, than the app asked for permission again and than it worked. Maybe somebody will need this info

user_132117530
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