Android实现数据按照时间排序

public static Date stringToDate(String dateString) {
    ParsePosition position = new ParsePosition(0);
    SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    Date dateValue = simpleDateFormat.parse(dateString, position);
    return dateValue;
  }

private void sortData(ArrayList<CourseModel  mList) {
    Collections.sort(mList, new Comparator<CourseModel () {
      /**
       *
       * @param lhs
       * @param rhs
       * @return an integer < 0 if lhs is less than rhs, 0 if they are
       *     equal, and   0 if lhs is greater than rhs,比较数据大小时,这里比的是时间
       */
      @Override
      public int compare(CourseModel lhs, CourseModel rhs) {
        Date date1 = DateUtil.stringToDate(lhs.getCREATE_TIME());
        Date date2 = DateUtil.stringToDate(rhs.getCREATE_TIME());
        // 对日期字段进行升序，如果欲降序可采用after方法
        if (date1.before(date2)) {
          return 1;
        }
        return -1;
      }
    });
    adapter.replaceAll(mList);
  }