/**
   * 为list添加数据
   *
   * @param userEntity
   * @return
   */
  private void addData(UserEntity userEntity) {

    ContactsItemData data = new ContactsItemData();

    // 添加用户名
    data.setContactsUserName(userEntity.getUsername());

    // 添加昵称
    data.setContactsUserNickname(userEntity.getUserNickName());

    // 添加头像的网络地址
    data.setContactsUserHeadImageURL(userEntity.getUserHeadImageUrl());

    // 汉字转拼音
    String pinyin = mCharacterParser.getSelling(userEntity.getUserNickName());
    String sortString = pinyin.substring(0, 1).toUpperCase();

    // 正则表达式,判断首字母是否为英文字母
    if (sortString.matches("[A-Z]")) {
      data.setSortLetters(sortString);
    } else {
      data.setSortLetters("#");
    }

    mContactsList.add(data);
  }
  private void filterData(String filterData) {
    List<ContactsItemData> filterDataList = new ArrayList<ContactsItemData>();
    if (TextUtils.isEmpty(filterData)) {
      filterDataList = mContactsList;

    } else {
      filterDataList.clear();

      for (ContactsItemData item : mContactsList) {
        String name = item.getContactsUserNickname();

        if (name.indexOf(filterData) != -1
            || mCharacterParser.getSelling(name).startsWith(filterData.toString())) {

          filterDataList.add(item);
        }
      }
    }

    // 根据a-z排序
    Collections.sort(filterDataList, mPinyinComparator);
    mContactsListViewAdapter.updateListView(filterDataList);
  }
  /**
   * 为list添加数据
   *
   * @param data
   * @return
   */
  private List<ContactsItemData> addData(String[] data) {

    List<ContactsItemData> itemData = new ArrayList<>();

    for (int i = 0; i < data.length; i++) {
      ContactsItemData model = new ContactsItemData();
      model.setContactsUserNickname(data[i]);

      // 汉字转拼音
      String pinyin = mCharacterParser.getSelling(data[i]);
      String sortString = pinyin.substring(0, 1).toUpperCase();

      // 正则表达式,判断首字母是否为英文字母
      if (sortString.matches("[A-Z]")) {
        model.setSortLetters(sortString);
      } else {
        model.setSortLetters("#");
      }

      itemData.add(model);
    }

    return itemData;
  }
  private void init() {

    mCharacterParser = CharacterParser.getInstance();
    mPinyinComparator = new PinYinComparator();
  }