CODEWITHSUNDEEP
javaandroidjodatime
Dan Chaltiel
Dan Chaltiel

Reputation: 8494

Unexpected result with jodatime LocalDate.now()

I'm using Jodatime for android and got this :

LocalDate.now() //returns 2015-12-17, which is today
new LocalDate(LocalDate.now().toDate().getTime()); //returns 2015-12-16, which is yesterday

That's really unexpected !

Is that

I store dates in my database as long and create them later, there doesn't seem to be any problem though.

Upvotes: 1

Views: 849

Answers (2)

Dan Chaltiel
Dan Chaltiel

Reputation: 8494

I finally got the answer, in the app method where you call init, you just have to write one more line :

JodaTimeAndroid.init(this);
DateTimeZone.setDefault(DateTimeZone.forTimeZone(TimeZone.getDefault()));

This way you set the default of jodatime to the default of your smartphone.

I'm really surprised this cannot be found anywhere.

Upvotes: 2

Semih Eker
Semih Eker

Reputation: 2409

This part is specifying that point.

Get the date time as a java.util.Date. The Date object created has exactly the same year, month and day as this date. The time will be set to the earliest valid time for that date.

Converting to a JDK Date is full of complications as the JDK Date constructor doesn't behave as you might expect around DST transitions. This method works by taking a first guess and then adjusting the JDK date until it has the earliest valid instant. This also handles the situation where the JDK time zone data differs from the Joda-Time time zone data.

And for your question(how can I store my dates as long using jodatime ? ), you can use miliseconds to store your date as long.

Try like this;

public static void main(String[] args) {

    DateTime local = new DateTime();
    DateTime utc = new DateTime(DateTimeZone.UTC);

    System.out.println("local zone = " + local.getZone());
    System.out.println("  utc zone = " + utc.getZone());

    DateTimeFormatter format = DateTimeFormat.mediumDateTime();
    System.out.println(" local: " + format.print(local));
    System.out.println("   utc: " + format.print(utc));
    System.out.println("millis: " + utc.getMillis());
}

And the output is;

local zone = America/Caracas
  utc zone = UTC
 local: 18.Ara.2015 05:06:00
   utc: 18.Ara.2015 09:36:00
millis: 1450431360816

Upvotes: 0

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