ReadFromRealmUI.java

private Realm realmUI;

protected void onCreate(Bundle savedInstanceState) {
    // ...
    realmUI = Realm.getDefaultInstance();
    // ...
}

private WeatherRealm readFromRealm(String name) {
    return findInRealm(realmUI, name);
}

private WeatherRealm findInRealm(Realm realm, String name) {
    return realm.where(WeatherRealm.class).equalTo("name", name).findFirst();
}

@Override
protected void onDestroy() {
    super.onDestroy();
    realmUI.close();
}