title: Android - How can I save user setting preferences even after the user closes the app with KOTLIN?
body: <p>My situation is:</p>
  <p>I have my settings fragment. Inside my settings fragment I can change language and theme. The question is: how can i save the user settings preferences even after the user closes the application, and once the user will reopen the app, he will have the options choosed before.</p>
  <p>Could you give me some examples? Thanks</p>