private ArrayList<DataModel> addUniqueDataModel(ArrayList<DataModel> resultData, DataModel dataModel) {
        int i = 0;
        boolean isExistNotUnique = false;
        for (i = 0; i < resultData.size(); i++) {
            if (resultData.get(i).getTopicContent().equals(dataModel.getTopicContent()) &&
                    resultData.get(i).getRealDate() < dataModel.getRealDate()) {
                isExistNotUnique = true;
                break;
            }
        }
        if (isExistNotUnique) {
            resultData.remove(i);
        }
        resultData.add(dataModel);
        return resultData;
    }