Saving data upon closing app and retrieving that data

Question

I know, there are plenty of questions in regards to saving/retrieving data on here. I was doing find looking things up on my own and really thought I could manage to find m

Answer 1

Best way to achieve that is:

• create a class. Call it MySettings, or whatever suits you
• in this class, define the array of ints / booleans you are going to share, as static. Create getter & setter method (property) to access that (also as static methods)
• add a static load() method to MySettings that reads from SharedPreferences. When you launch the app (in your first activity or better in a subclass of Application) call MySettings.load(). This load method sets the array
• add a static save() method. Public also. Now you can save from anywhere in you app. This save() method reads the array and writes in SharedPreferences

Code sample:

public class MySettings {
    private static List  data;

    public static void load() {
        data = new ArrayList();
        // use SharedPreferences to retrieve all your data

    }

    public static void save() {
        // save all contents from data
    }

    public static List getData() {
        return data;
    }

    public static void setData(List data) {
        MySettings.data = data;
    }
}