CODEWITHSUNDEEP
javaandroiddatekotlinsimpledateformat
wawanopoulos
wawanopoulos

Reputation: 9804

How to know if a date is in previous x minutes?

I have an ISO String date like this one: 2019-12-17 15:14:29.198Z

I would like to know if this date is in the previous 15 minutes from now. Is-it possible to do that with SimpleDateFormat ?

val dateIso = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.FRENCH).parse(isoString)

Upvotes: 3

Views: 4027

Answers (3)

Basil Bourque
Basil Bourque

Reputation: 339372

java.time.Instant

Use Instant class to represent a moment in UTC.

To parse, replace SPACE with a T per the ISO 8601 standard.

Instant instant = Instant.parse( "2019-12-17 15:14:29.198Z".replace( " " , "T" ) ;

Determine the current moment in UTC.

Instant now = Instant.now() ;

Determine 15 minutes ago. Call plus…/minus… methods for date-time math.

Instant then = now.minusMinutes( 15 ) ;

Apply your test. Here we use the Half-Open approach where the beginning is inclusive while the ending is exclusive. 

boolean isRecent = 
    ( ! instant.isBefore( then ) )  // "Not before" means "Is equal to or later".
    && 
    instant.isBefore( now )         
;

For older Android, add the ThreeTenABP library that wraps the ThreeTen-Backport library. Android 26+ bundles java.time classes.

Table of which java.time library to use with which version of Java or Android

If you are doing much of this work, add the ThreeTen-Extra library to your project (may not be appropriate for Android, not sure). This gives you the Interval class and it’s handy comparison methods such as contains. 

Interval.of( then , now ).contains( instant )

Upvotes: 4

Ev0lv3zz
Ev0lv3zz

Reputation: 58

If you already know the reference date everytime you access the program, you can use java.util.Calendar.

boolean isBefore;
long timeToCheck = 15*60*1000; //15 minutes.
Calendar calendar = Calendar.getInstance(), calendar2 = Calendar.getInstance();
calendar.set(Calendar.DATE, yourDay);
calendar.set(Calendar.HOUR_OF_DAY, yourHour);
calendar.set(Calendar.MINUTE, yourMinute);
calendar.set(Calendar.SECOND, yourSecond);

if (calendar.before(calendar2)){
  long timeInMillis = calendar2.getTimeInMillis() - calendar.getTimeInMillis();
  if ( timeInMillis >= timeToCheck ) isBefore = true;
  else isBefore = false;
}

Upvotes: 0

hameemyousuf
hameemyousuf

Reputation: 9

Is this you want:

int xMinutes = 10 * 60 * 1000;
long dateIsoinMillis = dateIso.getTime();
long xMinsAgo = System.currentTimeMillis() - xMinutes;
if (dateIsoinMillis < xMinsAgo) {
    System.out.println("searchTimestamp is older than 10 minutes");
}

Upvotes: -1

Related Questions