android 数组排序

一、Comparator

private class ComparatorByDate implements Comparator<String> {
    @Override
    public int compare(String lhs, String rhs) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmss");
        try {
            Date sDate = sdf.parse(lhs);
            Date rDate = sdf.parse(rhs);

            long diff = sDate.getTime() - rDate.getTime();
            if (diff > 0) {
                return 1;
            } else if (diff < 0) {
                return -1;
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return 0;
    }
}