如何使用数据编辑json文件并保存

Question

I have a json file with a lot of objects. This file is located in res/raw. Im reading this file and showing objects in list in my UI. And after user closing activity with this list, changes that user made most be saved in file that was read.

Answer 1

If your file is located inside of your apk file, you cannot change it. Instead of that have a flag stored in persistent store. If it is a first run of your application, then read this json file from apk, process it and store it in the device filesystem.

And every next run, check the flag, if it is not the first run, read the file from the filesystem and process it further.

Answer 2

这是使事物静态化的一种坏方法，但是如果对您来说太紧急，则可以读取一次json文件并将其转换为java model（pojo）对象，并使该对象静态化，当您下次访问相同活动时，从该对象加载ui静态对象，而不是再次读取和解析它，为安全起见，您可以检查pojo类对象是否为null。