How to get current date time in milliseconds in android

Question

i am trying to save my file with name as current date and time in milliseconds. and while reading file i want to read latest one.Here is the code

 Calendar rightNow = Calendar.getInstance();

  long offset = rightNow.get(Calendar.ZONE_OFFSET) +  rightNow.get(Calendar.DST_OFFSET);

  String sinceMidnight = Long.toString((rightNow.getTimeInMillis() + offset) %  (24 * 60 * 60 * 1000));

  return sinceMidnight+"_"+Filename;

@Supreet- System.currentTimeMillis(); -Returns the current system time in milliseconds — TheFlash, May 13 '13 at 07:35
Try the soln. that i have mentioned. Im not too sure on why you would need the offset. If you are using this value to retrieve the date then setTime (your file name) would anyway set with the same timestamp value. — lokoko, May 13 '13 at 07:44
@Supreet System.currentTimeMillis(); what error happened when you use this? — edwin, May 13 '13 at 08:54

edwin · Answer 1 · 2018-03-26T14:09:08.627

350

I think leverage this functionality using Java

long time= System.currentTimeMillis();

this will return current time in milliseconds mode . this will surely work

long time= System.currentTimeMillis();
android.util.Log.i("Time Class ", " Time value in millisecinds "+time);

Here is my logcat using the above function

05-13 14:38:03.149: INFO/Time Class(301): Time value in millisecinds 1368436083157

If you got any doubt with millisecond value .Check Here

EDIT : Time Zone I used to demo the code IST(+05:30) ,So if you check milliseconds that mentioned in log to match with time in log you might get a different value based your system timezone

EDIT: This is easy approach .but if you need time zone or any other details I think this won't be enough Also See this approach using android api support

edited Mar 26 '18 at 14:09

answered May 13 '13 at 08:51

edwin

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This is the most unreliable way to get the current time considering that different systems will return a different value. The documentation is quite explicit about it – Leo Nov 23 '18 at 02:13
@Leo hope you have read my edits , which is same point you mentioned. – edwin Feb 14 '19 at 08:58

score 24 · Answer 2 · edited Mar 08 '16 at 09:19

24

The problem is that System. currentTimeMillis(); returns the number of milliseconds from 1970-01-01T00:00:00Z, but new Date() gives the current local time. Adding the ZONE_OFFSET and DST_OFFSET from the Calendar class gives you the time in UTC.

Calendar rightNow = Calendar.getInstance();

// offset to add since we're not UTC

long offset = rightNow.get(Calendar.ZONE_OFFSET) +
    rightNow.get(Calendar.DST_OFFSET);

long sinceMidnight = (rightNow.getTimeInMillis() + offset) %
    (24 * 60 * 60 * 1000);

System.out.println(sinceMidnight + " milliseconds since midnight");

edited Mar 08 '16 at 09:19

logcat

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answered May 13 '13 at 07:38

Sunil Kumar

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1

how does this answer differ from OP? – Istiaque Ahmed Jun 18 '16 at 09:42
@sunil kumar rightNow.getTimeInMillis() will return you local time in Milli Seconds so I believe offset will be subtracted from rightNow.getTimeInMillis() else this will not work for time zones with (GMT+N). long sinceMidnight = (rightNow.getTimeInMillis() + offset) % (24 * 60 * 60 * 1000); – muak Sep 06 '17 at 12:49

Rachel Gallen · Answer 3 · 2013-05-13T07:44:49.383

3

try this

  Calendar c = Calendar.getInstance(); 
  int mseconds = c.get(Calendar.MILLISECOND)

an alternative would be

 Calendar rightNow = Calendar.getInstance();

 long offset = rightNow.get(Calendar.ZONE_OFFSET) +
        rightNow.get(Calendar.DST_OFFSET);
 long sinceMid = (rightNow.getTimeInMils() + offset) %
       (24 * 60 * 60 * 1000);

  System.out.println(sinceMid + " milliseconds since midnight");

edited May 13 '13 at 07:44

answered May 13 '13 at 07:38

Rachel Gallen

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see this reference it may help you http://developer.android.com/reference/android/os/SystemClock.html#setCurrentTimeMillis%28long%29 – Rachel Gallen May 13 '13 at 08:02

score -1 · Answer 4 · answered May 13 '13 at 07:39

-1

Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
int mSec = calendar.get(Calendar.MILLISECOND);

answered May 13 '13 at 07:39

lokoko

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How to get current date time in milliseconds in android

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