open failed EACCES Permission denied

Question

I am having a very weird problem with storage accessing on some devices  The app works on my testing devices  Nexus 4  amp  7  Samsung GS5   All my devices running Android 4 4 2  But I received many emails from users saying that the app can not write to the storage  neither the internal storage nor the sd card   From the log file received from user feedback  I can see the problem is the following code   try       if  fStream    null        fStream   new FileOutputStream filename  true         fStream write data  0  bytes       return    catch  IOException ex        ex printStackTrace        It throws exception at the line fStream   new FileOutputStream filename  true   when creating FileOutputStream   The stack log is   W System err  8147   Caused by  java io FileNotFoundException   storage emulated 0 my folder test file name png  open failed  EACCES  Permission denied  w System err  8147      at libcore io IoBridge open IoBridge java 409  W System err  8147      at java io FileOutputStream  lt init gt  FileOutputStream java 88  W System err  8147      at java io FileOutputStream  lt init gt  FileOutputStream java 128  W System err  8147      at myapp save SourceFile 515  W System err  8147          8 more W System err  8147   Caused by  libcore io ErrnoException  open failed  EACCES  Permission denied  W System err  8147      at libcore io Posix open Native Method  W System err  8147      at libcore io BlockGuardOs open BlockGuardOs java 110  W System err  8147      at libcore io IoBridge open IoBridge java 393  W System err  8147          11 more   In the AndroidManifest xml I have the following permissions declared     lt uses-sdk android minSdkVersion  14  android targetSdkVersion  19   gt       lt uses-permission android name  android permission INTERNET   gt   lt uses-permission android name  android permission ACCESS NETWORK STATE   gt   lt uses-permission android name  android permission ACCESS WIFI STATE   gt   lt uses-permission android name  android permission READ EXTERNAL STORAGE    gt   lt uses-permission android name  android permission WRITE EXTERNAL STORAGE   gt     I ve confirmed that the users are using the correct app s private on the SD card  And what s more weird is that it fails to write to internal storage as well  How can this happen if I have both read  amp  write permissions  The users say they are not connecting their devices to the PC at that time   Update  It turns out I am calling open and close FileOutputStream too frequently  which throws the FileNotFoundException at some point  Sounds more like a threading issue

User · Answer

If the clients are using Android 6 0  Android added new permission model for  Marshmallow    Trick  If you are targeting version 22 or below  your application will request all permissions at install time just as it would on any device running an OS below Marshmallow

User · Answer

I also faced the same issue  After lot of hard work  I found what was wrong in my case  My device was connected to computer via USB cable  There are types for USB connections like Mass Storage  Media Device MTP   Camera PTP  etc  My connection type was -  Mass Storage   and this was causing the problems  When I changed the connection type  the issue was solved   Always remember while accessing filesystem on android device  -   DON T CONNECT AS MASS STORAGE to the computer pc

User · Answer

In my case I used the option android isolatedProcess  true  for a service in the AndroidManifest xml   As soon as I removed it  the error disappeared

User · Answer

Uriel Frankel is correct that the Android 10 storage access has changed  But the right way is not to use legacy storage flag but to request the storage of your app like so   val screenShotDirPath   getApplication lt Application gt    getExternalFilesDir Environment DIRECTORY PICTURES   path   getExternalFilesDir is what you need

User · Answer

In my case it was permissions issue  The catch is that on device with Android 4 0 4 I got access to file without any error or exception  And on device with Android 5 1 it failed with ACCESS exception  open failed  EACCES  Permission denied    Handled it with adding follow permission to manifest file    lt uses-permission android name  android permission READ EXTERNAL STORAGE   gt    So I guess that it s the difference between permissions management in OS versions that causes to failures

User · Answer

In my case I had the wrong case in    lt uses-permission android name  android permission WRITE EXTERNAL STORAGE    gt    android permission must be lowercase  and somehow the entire string was uppercase in our source

User · Answer

in my case i forgot to add   in front of file name after i added i got rid of from it   bitmap compress Bitmap CompressFormat PNG 100 new FileOutputStream Environment getExternalStorageDirectory     arjunreddy png

User · Answer

For API 23  you need to request the read write permissions even if they are already in your manifest      Storage Permissions private static final int REQUEST EXTERNAL STORAGE   1  private static String   PERMISSIONS STORAGE             Manifest permission READ EXTERNAL STORAGE          Manifest permission WRITE EXTERNAL STORAGE            Checks if the app has permission to write to device storage       If the app does not has permission then the user will be prompted to grant permissions        param activity     public static void verifyStoragePermissions Activity activity           Check if we have write permission     int permission   ActivityCompat checkSelfPermission activity  Manifest permission WRITE EXTERNAL STORAGE        if  permission    PackageManager PERMISSION GRANTED               We don t have permission so prompt the user         ActivityCompat requestPermissions                  activity                  PERMISSIONS STORAGE                  REQUEST EXTERNAL STORAGE                      AndroidManifest xml   lt uses-permission android name  android permission READ EXTERNAL STORAGE    gt   lt uses-permission android name  android permission WRITE EXTERNAL STORAGE    gt

User · Answer

Apps targeting Android Q - API 29 by default are given a filtered view into external storage  A quick fix for that is to add this code in the AndroidManifest xml    lt manifest      gt       lt  -- This attribute is  false  by default on apps targeting Android Q  -- gt       lt application android requestLegacyExternalStorage  true       gt                lt  application gt   lt  manifest gt    Read more about it here  https   developer android com training data-storage compatibility

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Add these both permission of read and write  to solve this issue  lt uses-permission android name  quot android permission WRITE EXTERNAL STORAGE quot    gt   lt uses-permission android name  quot android permission READ EXTERNAL STORAGE quot    gt   Add this below line in Application tag android requestLegacyExternalStorage  quot true quot

User · Answer

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

User · Answer

I ran into the same problem and found that I have to request the permissions at run time  even if I have declared it in the manifest  Just as stated as Justin Fiedler s answer   The official documentation about this are here  https   developer android com training permissions requesting html  My implementation is slightly different from Justin Fiedler s answer that it also implement v4 fragment s onRequestPermissionsResult method to handle the permissions request response   public static final int REQUEST EXTERNAL PERMISSION CODE   666    RequiresApi api   Build VERSION CODES JELLY BEAN  public static final String   PERMISSIONS EXTERNAL STORAGE             READ EXTERNAL STORAGE          WRITE EXTERNAL STORAGE     public boolean checkExternalStoragePermission Activity activity        if  android os Build VERSION SDK INT  lt  android os Build VERSION CODES JELLY BEAN            return true             int readStoragePermissionState   ContextCompat checkSelfPermission activity  READ EXTERNAL STORAGE       int writeStoragePermissionState   ContextCompat checkSelfPermission activity  WRITE EXTERNAL STORAGE       boolean externalStoragePermissionGranted   readStoragePermissionState    PackageManager PERMISSION GRANTED  amp  amp              writeStoragePermissionState    PackageManager PERMISSION GRANTED      if   externalStoragePermissionGranted            requestPermissions PERMISSIONS EXTERNAL STORAGE  REQUEST EXTERNAL PERMISSION CODE              return externalStoragePermissionGranted      Override public void onRequestPermissionsResult int requestCode   NonNull String   permissions   NonNull int   grantResults        if  grantResults length  gt  0  amp  amp  grantResults 0     PackageManager PERMISSION GRANTED            if  requestCode    REQUEST EXTERNAL PERMISSION CODE                if  checkExternalStoragePermission getActivity                          Continue with your action after permission request succeed

User · Answer

First give or check permissions like   lt uses-permission android name  android permission WRITE EXTERNAL STORAGE    gt   lt uses-permission android name  android permission READ EXTERNAL STORAGE   gt    If these two permissions are OK  then check your output streams are in correct format   Example    FileOutputStream fos new FileOutputStream Environment getExternalStorageDirectory     rahul1 jpg

User · Answer

This error was thrown by another app that I m sharing my app s file to  using Intent FLAG GRANT READ URI PERMISSION  Turns out  the File Uri has to be provided via FileProvider class as shown here

User · Answer

I got the same issue but Sometimes  the most dificult issue get simple answer   I recheck the manifest permisions and there WAS NOT write permision shame of me

User · Answer

Also I found solving for my way   Before launch app i granted root to file-explorer and did not disable permission on write read when exit from app   My app can not use external memory while i did restrat device for resetting all permissions

User · Answer

In my case the issue was the WIFI Configuration that was static had a conflict with another device using the same IP Address

[android] open failed: EACCES (Permission denied)

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