public List<String> getModuleKeys(String module) {
		ArrayList<String> keys = new ArrayList<>();
		Enumeration<Object> keyEnum = mPrefs.keys();

		while (keyEnum.hasMoreElements()) {
			String key = (String) keyEnum.nextElement();

			if (key.startsWith(module)) {
				key = key.substring(key.indexOf('.') + 1);
				if (key != null && key.length() > 0) {
					keys.add(key);
				}
			}
		}

		return keys;
	}