Android SharedPreferences String Set - some items are removed after app restart

Question

I save a string set in the shared preferences, if I read it out it\'s ok. I start other activities, go back and read it again, it\'s ok. If I close the application, and start it

Answer 1

Ran into this same problem. Solved it by clearing the editor after instantiating and before committing.

sPrefs = PreferenceManager.getDefaultSharedPreferences(context);
    sFavList = sPrefs.getStringSet(context.getResources().getString(R.string.pref_fav_key), null);
    sEditor = sPrefs.edit();
    sEditor.clear(); // added clear, now Set data persists as expected
    if (sFavList == null) sFavList = new HashSet<>();
    sFavList.add(title);
    sEditor.putStringSet(context.getResources().getString(R.string.pref_fav_key), sFavList).apply();

I tried creating a copy as others suggested, but that didn't work for me.

Found this solution here.