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

Question

I am getting

open failed: EACCES (Permission denied)

on the line OutputStream myOutput = new FileOutputStream(outFileName);

I checked the root, and I tried android.permission.WRITE_EXTERNAL_STORAGE.

How can I fix this problem?

try {     InputStream myInput;      myInput = getAssets().open("XXX.db");      // Path to the just created empty db     String outFileName = "/data/data/XX/databases/"             + "XXX.db";      // Open the empty db as the output stream     OutputStream myOutput = new FileOutputStream(outFileName);      // Transfer bytes from the inputfile to the outputfile     byte[] buffer = new byte[1024];     int length;     while ((length = myInput.read(buffer)) > 0) {         myOutput.write(buffer, 0, length);     }      // Close the streams     myOutput.flush();     myOutput.close();     myInput.close();     buffer = null;     outFileName = null; } catch (IOException e1) {     // TODO Auto-generated catch block     e1.printStackTrace(); } 

Answer 1

Google has a new feature on Android Q: filtered view for external storage. A quick fix for that is to add this code in the AndroidManifest.xml file:

<manifest ... >     <!-- This attribute is "false" by default on apps targeting Android Q. -->     <application android:requestLegacyExternalStorage="true" ... >      ...     </application> </manifest> 

You can read more about it here: https://developer.android.com/training/data-storage/use-cases

Edit: I am starting to get downvotes because this answer is out of date for Android 11. So whoever sees this answer please go to the link above and read the instructions.

Answer 2

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

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

For official documentation about requesting permissions for API 23+, check https://developer.android.com/training/permissions/requesting.html