Create File using Uri in android

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Java

Mobile

Android

Hello, I'm trying to create a File from Uri(selected image). This is my code :

//get The real path from uri then save it (and then use it to create the file)
photosHolder.getInstance().setUriString(getRealPathFromURI(currImageURI));

//Convert the image URI to the direct file system path of the image file
    private String getRealPathFromURI(Uri contentURI) {
        String result = "";
        try {
        Cursor cursor = getActivity().getContentResolver().query(contentURI, null, null, null, null);
        if (cursor == null) { // Source is Dropbox or other similar local file path
            result = contentURI.getPath();
        } else {
            cursor.moveToFirst();
            int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
            result = cursor.getString(idx); // Exception raised HERE
            cursor.close(); }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

But I got Always this exception :

java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow.  Make sure the Cursor is initialized correctly before accessing data from it and the idx var == to -1