Converting datetime to string, wrong hours

Question

I am doing like this in my android app (java):

String sdt_ = DateFormat.format("yyyyMMdd  HH:mm", dt_).toString();

but I got this

01-16 14:31:13.308: D/ThS(25810): dt_ = Wed Jan 16 13:28:00 GMT+00:00 2013
01-16 14:31:23.758: D/ThS(25810): sdt_ = 20130116  HH:28

if I change HH to hh I will get this

sdt_ = 20130116  01:28

but I need this

sdt_ = 20130116  13:28

:) result is 01-16 15:04:21.818: D/ThS(29811): dt_ = yyyyMMdd HH:mm — Foenix, Jan 16 '13 at 15:05

score 8 · Accepted Answer · edited May 23 '17 at 12:05

8

i don't know, what is wrong with your code, but this code works for me:

DateFormat df = new SimpleDateFormat("yyyyMMdd  HH:mm");
String sdt = df.format(new Date(System.currentTimeMillis()));
System.out.println(sdt);

EDIT:

later I found out that your original code should work with this:

String sdt_ = DateFormat.format("yyyyMMdd  kk:mm", dt_).toString();

apparently, android.text.format.DateFormat doesn't use 'H' constraint and uses 'k' instead of it! see this question for more details: How to set 24-hours format for date on java?

edited May 23 '17 at 12:05

Community

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answered Jan 16 '13 at 15:02

Berťák

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see my other answer, if you still want to use android.text.format.DateFormat :-) – Berťák Jan 16 '13 at 15:20

score 4 · Answer 2 · answered Jan 16 '13 at 15:02

4

This will do it for you:

SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd  HH:mm", Locale.getDefault());
String sdt_ = sdf.format(dt_);

answered Jan 16 '13 at 15:02

jenzz

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thank you, it is working (with or without Locale.getDefault()) – Foenix Jan 16 '13 at 15:19
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It does work without `Locale.getDefault()`, but if you are using Eclipse it will show you a lint warning and ask you to provide a locale to allow local date formatting. So explicitly setting the default locale is the same as omitting it. – jenzz Jan 16 '13 at 15:30
yes I saw this hint, now I know how to use default locale, thank you – Foenix Jan 16 '13 at 17:03

score 4 · Answer 3 · answered Jan 16 '13 at 15:11

4

You used hh in your SimpleDateFormat pattern. Thats the 12 hour format. Use kk instead, that gives you the hours of the day in a 24 hour format.See SimpleDateFormat

answered Jan 16 '13 at 15:11

K_Anas

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I do not see any 'kk' by your link . I used HH in my pattern. – Foenix Jan 16 '13 at 15:16
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@Foenix see in the table k hour in day (1-24) (Number) 24 – K_Anas Jan 16 '13 at 15:21

Converting datetime to string, wrong hours

3 Answers3