Android save int

public void saveInt(int val, String key){
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(mainActivity);
    SharedPreferences.Editor editor = prefs.edit();
    editor.putInt(key, val);
    editor.apply();
}

public int getInt(String key){
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(mainActivity);
    int val = prefs.getInt(key, 0);
    return val;
}

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