Cannot delete files on SDcard

Anas.J :

I am trying to delete some files on the SD card , but i ran out of ideas..

I tried File.delete() method, then I have tried file.getCanonicalFile().delete() and many more .. My application can just delete files on the device storage . I have got the permissions defined in the Manifest file that is required like below.

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

and I am requesting for permission in the code also:

  if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
        new AlertDialog.Builder(this)
                .setTitle(R.string.read_storage_message)
                .setPositiveButton(R.string.ok,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {
                                ActivityCompat.requestPermissions(activity,
                                        new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, MainActivity.READ_STORAGE_PERMISSION_ID);
                            }
                        }
                )
                .setNegativeButton(R.string.cancel,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {
                                AppKiller.kill();

                            }
                        }
                ).show();
    }
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
        new AlertDialog.Builder(this)
                .setTitle(R.string.write_storage_message)
                .setPositiveButton(R.string.ok,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {
                                ActivityCompat.requestPermissions(activity,
                                        new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, MainActivity.STORAGE_PERMISSION_ID);
                            }
                        }
                )
                .setNegativeButton(R.string.cancel,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {
                                AppKiller.kill();

                            }
                        }
                ).show();
    }
}

I am using the following method to delete the files, but as i mentioned before, I've used plenty of solutions found in Stack-overflow and others.

protected boolean delete(Context context) throws Exception {
        boolean delete = false;
        File file = new File(Environment.getExternalStorageDirectory().getPath() + getName());
        if (file.exists()) {
            delete = file.delete();
            if (!delete) {
                delete = file.getCanonicalFile().delete();
            }
            if (!delete) {
                String deleteCmd = "rm -r " + file.getAbsolutePath();
                Runtime runtime = Runtime.getRuntime();
                runtime.exec(deleteCmd);
            }
        }
        return delete;
    }

could it be because i am asking for READ_EXTERNAL_STORAGE and WRITE_EXTERNAL_STORAGE permissions, but in code i am just getting READ_EXTERNAL_STORAGE granted and the other is getting ignored from Android(it won't show permission WRITE_EXTERNAL_STORAGE popup with allow-deny options after I accept the first one) . Isn't it because they have the same permission's level in android ?

what could be wrong ?

greenapps :

Yes you cannot delete files from SD card on modern Android versions anymore using the File class.

Use the Storage Access Framework instead.

Have a look at Intent.OPEN_DOCUMENT_FILE and OPEN_DOCUMENT_TREE.