java io FileNotFoundException storage emulated 0 New file txt open failed EACCES Permission denied

Question

I ve been trying to encrypt files and write those files back on to the same place  But I got the error message saying  java io FileNotFoundException   storage emulated 0 New file txt  open failed  EACCES  Permission denied     My Manifest file is this    lt manifest xmlns android  http   schemas android com apk res android  package  com example tdk mytestapplication2  gt    lt uses-permission android name  android permission READ EXTERNAL STORAGE    gt   lt uses-permission android name  android permission WRITE EXTERNAL STORAGE   gt     lt application     android allowBackup  true    I think I have provided correct permission there  And the code I am using to encrypt files is this    public static void encrypt SecretKey secretKey  String filePath       try              Here you read the cleartext          FileInputStream fis   new FileInputStream filePath              This stream write the encrypted text  This stream will be wrapped by another stream          FileOutputStream fos   new FileOutputStream filePath               Create cipher         Cipher cipher   Cipher getInstance  AES            cipher init Cipher ENCRYPT MODE  secretKey              Wrap the output stream         CipherOutputStream cos   new CipherOutputStream fos  cipher               Write bytes         int b          byte   d   new byte 8           while   b   fis read d      -1                cos write d  0  b                         Flush and close streams          cos flush            cos close            fis close          catch IOException e           e printStackTrace         catch  NoSuchAlgorithmException e           e printStackTrace         catch NoSuchPaddingException e           e printStackTrace         catch InvalidKeyException e           e printStackTrace              And I used this method inside a button   Button btnEncrypt    Button  findViewById R id btnEnc       btnEncrypt setOnClickListener new OnClickListener              Override         public void onClick View v                aesKey   EncAndDec generateKey                String filePath   editText getText   toString                  Generating the file hash             String md5Hash   MD5Hash getMD5 filePath                System out println aesKey toString                 System out println filePath               System out println md5Hash                  Encrypting the file             for int i 1  i lt 100  i                      EncAndDec encrypt aesKey  filePath                                     Still I couldn t configure this error  Please someone help

User · Accepted Answer

I suspect you are running Android 6 0 Marshmallow  API 23  or later  If this is the case  you must implement runtime permissions before you try to read write external storage

User · Answer

If you are running in Android 29 then you have to use scoped storage or for now  you can bypass this issue by using  android requestLegacyExternalStorage  quot true quot  in manifest in the application tag

User · Answer

For SDK 29   String str1    quot  quot   folder1   new File String valueOf Environment getExternalStoragePublicDirectory Environment DIRECTORY MOVIES     if  folder1 exists     str1   folder1 toString     File separator    public static void createTextFile String sBody  String FileName  String Where        try           File gpxfile   new File Where  FileName           FileWriter writer   new FileWriter gpxfile           writer append sBody           writer flush            writer close          catch  IOException e            e printStackTrace             Then you can save your file like this   createTextFile  quot This is Content quot   quot file txt quot  str1

User · Answer

Implement runtime permission for running your app on Android 6 0 Marshmallow  API 23  or later   or you can manually enable the storage permission-  goto settings apps   your app name   click on it  then click permissions  then enable the storage  Thats it   But i suggest go the for first one which is  Implement runtime permissions in your code

[java] java.io.FileNotFoundException: /storage/emulated/0/New file.txt: open failed: EACCES (Permission denied)

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