How to store multiple data into SharedPreference

Question

i have this

 mSharedPref.edit().putString("newuser",model.getName()).apply();

and this is where im retrieving the data in my onStart() method

Log.e("ONSTARTUSER",""+ mSharedPref.getString("newuser",null));

my output is this

ONSTARTUSER: Homer Simpson

but i have a collection of names, lets say like 10 names , and i want my shared preferences to display them all when i call the getString("newuser") , how can i do this ? im using firebaselistadapter

Answer 1

First convert your list to a set:

Set<String>usersSet= new HashSet<>(usersList);

Then save the set into SharedPreferences:

    SharedPreferences prefs = getSharedPreferences();
    SharedPreferences.Editor editor = prefs.edit();
    editor.putStringSet("newusers", usersSet);

And to get them:

    SharedPreferences prefs= getSharedPreferences();
    Set<String> usersSet= prefs.getStringSet("newusers", new HashSet<String>());

Answer 2

Two alternatives : use a StringSet with editor.putStringSet() or use a SQLite database.

The database seems the best solution for me to maintain a list of names (or a list of anything), more safe. If for example your app is killed by the system you can lose data with the Shared Prefs.