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

User · Answer

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

User · Answer

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

User · Answer

Calendar calendar   Calendar getInstance    calendar setTime new Date     int mSec   calendar get Calendar MILLISECOND

User · Answer

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

[android] How to get current date time in milliseconds in android

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