sample.java

public void addItem(ergebnisseListView item, int location) {
  if(location > 0 && location < listData.size()) {
    listData.add(item, location);
  } else {
    listData.add(item);
  }
  notifyDatasetChanged();
}

public void addItem(ergebnisseListView item) {
  addItem(item, -1);
}