Java.Io.Filenotfoundexception Open Failed Eacces (Permission Denied) on Device

open failed: EACCES (Permission denied)

I ran into a similar issue a while back.

Your problem could be in two different areas. It's either how you're creating the file to write to, or your method of writing could be flawed in that it is phone dependent.

If you're writing the file to a specific location on the SD card, try using Environment variables. They should always point to a valid location. Here's an example to write to the downloads folder:

java.io.File xmlFile = new java.io.File(Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
+ "/Filename.xml");

If you're writing the file to the application's internal storage. Try this example:

java.io.File xmlFile = new java.io.File((getActivity()
.getApplicationContext().getFileStreamPath("FileName.xml")
.getPath()));

Personally I rely on external libraries to handle the streaming to file. This one hasn't failed me yet.

org.apache.commons.io.FileUtils.copyInputStreamToFile(is, file);

I've lost data one too many times on a failed write command, so I rely on well-known and tested libraries for my IO heavy lifting.

If the files are large, you may also want to look into running the IO in the background, or use callbacks.

If you're already using environment variables, it could be a permissions issue. Check out Justin Fiedler's answer below.

Android Studio - java.io.FileNotFoundException: /abc.csv open failed: EACCES (Permission denied)

After File.exists() use File.canRead() before you act on the file.

This csv file is not created by your app.

Hence on Android 11 you are not the owner and although your app can check if the file exists it discovers with File.canRead() that the file is not accessable.

With MANAGE_EXTERNAL_STORAGE and the right runtime code your app can obtain access.

The right code would start an intent for Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION.

java.io.filenotfoundexception open failed eacces (permission denied) on device

This problem seems to be caused by several factors.

Check#1

First add this permission in your manifest file and check if it is working:

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

</application>

  .....

Check#2:

If you are running on an emulator, check the properties to see if it has an SD card.

Check#3:

Disable file transfer from device to computer. If Enabled, the app wont be able to access the SD card.

Check#4:

If still not working, try the following:

 String dir = Environment.getExternalStorageDirectory().getAbsolutePath()

For me the following worked:

The problem is that getExternalStorageDirectory returns /mnt/sdcard whereas I need the actual path of external storage which is /mnt/sdcard-ext and there is no API in android that can get me the absolute path of removable sdcard.

My solution was to hard code the directory as follows:

String dir = "/mnt/sdcard-ext" ;

Since the application is intended to work only on one device, the above did the job.

If you encounter the same problem, use an file explorer application to find out the name of the external directory and hard code it.

Exception 'open failed: EACCES (Permission denied)' on Android

I had the same problem... The <uses-permission was in the wrong place. This is right:

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

The uses-permission tag needs to be outside the application tag.

FileNotFoundException: open failed: EACCES (Permission denied)

you have to request permission before you start your instructions because this permission is considered dangerous in Marshmallow:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && 
checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)
{
requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, RESULT);
}
else
{
//your code
}


Related Topics



Leave a reply



Submit