android save int

1public void saveInt(int val, String key){
2    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(mainActivity);
3    SharedPreferences.Editor editor = prefs.edit();
4    editor.putInt(key, val);
5    editor.apply();
6}
7
8public int getInt(String key){
9    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(mainActivity);
10    int val = prefs.getInt(key, 0);
11    return val;
12}