SharedPreferences 保存 gson 數據

 public static void putUserInfo(UserInfoEntity userInfo) {
        Gson gson = new Gson();
        String userInfoStr = gson.toJson(userInfo);
        put("userEntity", userInfoStr);
    }

    public static UserInfoEntity getUserInfo() {
        Gson gson = new Gson();
        String userInfo = getString("userEntity");
        return gson.fromJson(userInfo, UserInfoEntity.class);

    }