void createNewDirectory(String name) {
        if (FileUtil.createNewDirectory(name, _currentDir)) {
            refreshDirs();
            return;
        }

        final File newDir = new File(_currentDir, name);
        Toast.makeText(_context,
            "Couldn't create folder " + newDir.getName() + " at " + newDir.getAbsolutePath(),
            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