How do I delete files programmatically on Android

Question

I m on 4 4 2  trying to delete a file  image  via uri  Here s my code   File file   new File uri getPath     boolean deleted   file delete    if  deleted         boolean deleted2   file getCanonicalFile   delete          if  deleted2              boolean deleted3   getApplicationContext   deleteFile file getName                 Right now  none of these delete functions is actually deleting the file  I also have this in my AndroidManifest xml    lt uses-permission android name  android permission READ EXTERNAL STORAGE    gt   lt uses-permission android name  android permission WRITE EXTERNAL STORAGE    gt   lt uses-permission android name  android permission WRITE INTERNAL STORAGE    gt

User · Answer

Try this one  It is working for me   handler postDelayed new Runnable          Override     public void run                Set up the projection  we only need the ID          String   projection     MediaStore Images Media  ID                Match on the file path         String selection   MediaStore Images Media DATA                   String   selectionArgs   new String     imageFile getAbsolutePath                  Query for the ID of the media matching the file path         Uri queryUri   MediaStore Images Media EXTERNAL CONTENT URI          ContentResolver contentResolver   getActivity   getContentResolver            Cursor c   contentResolver query queryUri  projection  selection  selectionArgs  null            if  c    null                if  c moveToFirst                         We found the ID  Deleting the item via the content provider will also remove the file                 long id   c getLong c getColumnIndexOrThrow MediaStore Images Media  ID                    Uri deleteUri   ContentUris withAppendedId queryUri  id                   contentResolver delete deleteUri  null  null                 else                      File not found in media store DB                           c close                       5000

User · Answer

I tested this code on Nougat emulator and it worked   In manifest add    lt application          lt provider         android name  android support v4 content FileProvider          android authorities    applicationId  provider          android exported  false          android grantUriPermissions  true  gt           lt meta-data             android name  android support FILE PROVIDER PATHS              android resource   xml provider paths   gt       lt  provider gt   lt  application gt    Create empty xml folder in res folder and past in the provider paths xml    lt  xml version  1 0  encoding  utf-8   gt    lt paths xmlns android  http   schemas android com apk res android  gt      lt external-path name  external files  path      gt     lt  paths gt    Then put the next snippet into your code  for instance fragment    File photoLcl   new File homeDirectory         fileNameLcl   Uri imageUriLcl   FileProvider getUriForFile getActivity       getActivity   getApplicationContext   getPackageName           provider   photoLcl   ContentResolver contentResolver   getActivity   getContentResolver    contentResolver delete imageUriLcl  null  null

User · Answer

File file new File getFilePath imageUri getValue      boolean b  file delete      not working in my case  The issue has been resolved by using below code-   ContentResolver contentResolver   getContentResolver     contentResolver delete  uriDelete null  null

User · Answer

Why don t you test this with this code   File fdelete   new File uri getPath     if  fdelete exists          if  fdelete delete              System out println  file Deleted      uri getPath           else           System out println  file not Deleted      uri getPath               I think part of the problem is you never try to delete the file  you just keep creating a variable that has a method call   So in your case you could try   File file   new File uri getPath     file delete    if file exists           file getCanonicalFile   delete          if file exists                getApplicationContext   deleteFile file getName                 However I think that s a little overkill   You added a comment that you are using an external directory rather than a uri  So instead you should add something like   String root   Environment getExternalStorageDirectory   toString    File file   new File root     images media 2918       Then try to delete the file

User · Answer

first call the intent  Intent intenta   new Intent Intent ACTION OPEN DOCUMENT TREE   startActivityForResult intenta  42     then call the result   Override protected void onActivityResult int requestCode  int resultCode  Intent data        super onActivityResult requestCode  resultCode  data       switch  requestCode            case 42              if  resultCode    Activity RESULT OK                    Uri sdCardUri   data getData                    DocumentFile pickedDir   DocumentFile fromTreeUri this  sdCardUri                   for  DocumentFile file   pickedDir listFiles                          String pp   file getName                        if pp equals  VLC apk                            file delete                        String ppdf                                       File pathFile   new File String valueOf sdCardUri                    pathFile delete                              break

User · Answer

I see you ve found your answer  however it didn t work for me  Delete kept returning false  so I tried the following and it worked  For anybody else for whom the chosen answer didn t work    System out println new File path  getAbsoluteFile   delete       The System out can be ignored obviously  I put it for convenience of confirming the deletion

[java] How do I delete files programmatically on Android?

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