@Override
                public void onShouldShowRequestPermissionRationale(final String[] permissions) {
                    Toast.makeText(_context, "You denied the Read/Write permissions on SDCard.",
                        Toast.LENGTH_LONG).show();
                }
allows dialog title follows the current folder name

@param followDir dialog title will follow the changing of directory
@return this
android-file-chooser/src/main/java/com/obsez/android/lib/filechooser/ChooserDialog.java