在activity里面监听来自服务器的json消息，服务端一接到更新就发json数据到移动端，每一次接收到json数据就提取参数刷新activity，但不想每次都JSONObject jsonobject = new JSONObject(json)，这样子好像不是很好，会影响性能，有什么好的解决方法吗？
According to your model, converting string to obj must go through this step, and the object is only generated when actively requesting it. There is no performance disadvantage.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
According to your model, converting string to obj must go through this step, and the object is only generated when actively requesting it. There is no performance disadvantage.