How does the Twitter app in the Android cache / store tweets in a list?

In the Twitter Android app, once the list is filled with tweets / elements downloaded from the server, it never talks to the server again to receive them again. Even if you kill the application and run it again, it still retrieves the same old data. How Twitter Stores This Most Of The Data. Does it use a database, storing all downloaded data in a file or caching.

In my application, I have a similar requirement. Now I store the downloaded list data in a file and then read it whenever the application starts again. There is a better approach or sequential step for this. Thank.