What is the best way to store an ArrayList?

Question

Project management

In the application, some progress is stored in an ArrayList, then it needs to be saved. I chose .txt as the simplest, but when loading the saved words, characters like [ ,, are added to them, which makes the list not valid.
SQLite just started to smoke and I don’t understand how to drive List into it. What is the best way to save? If through the database, then please tell me how to implement it. If through a text editor, how to remove extra characters.

Answer 1

Maybe wrike then, a cute design, a lot of lessons, Russian language support
, here is part of the integration
https://www.wrike.com/help/knowledge-base/integrations/

Answer 2

https://www.atlassian.com/software/jira

Answer 3

Array to JSONArray, JSONArray to String and DB.
When reading, the process is reversed:
A string from the database to a JSONArray, and that one to an array.
If you have a key-value dictionary, then JSONObject will do.
There are multiple classes for json, usually GSON.