×
Namespaces

Variants
Actions
(Difference between revisions)

Archived:Getting the current time is timezone dependent on S60 2nd Edition (Known Issue)

From Nokia Developer Wiki
Jump to: navigation, search
hamishwillee (Talk | contribs)
m (Hamishwillee - Bot change of template (Template:KnowledgeBase) - now using Template:ArticleMetaData)
hamishwillee (Talk | contribs)
m (Hamishwillee - Bot update)
Line 1: Line 1:
{{KBKI}}
+
{{ArticleMetaData <!-- v1.2 -->
__NOTOC__
+
__NOEDITSECTION__
+
{{ArticleMetaData
+
|id=KIJ000085
+
|platform=S60 2nd Edition
+
|devices=Nokia 6600
+
|category=
+
|subcategory=
+
|creationdate=
+
|keywords=
+
 
+
 
|sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
 
|sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
 
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
 
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
|sdk=<!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
+
|devices= Nokia 6600
|devicecompatability=<!-- Compatible devices (e.g.: All* (must have GPS) ) -->
+
|sdk= <!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
|signing=<!-- Empty or one of Self-Signed, DevCert, Manufacturer -->
+
|platform= S60 2nd Edition
|capabilities=<!-- Capabilities required (e.g. Location, NetworkServices.) -->
+
|devicecompatability= <!-- Compatible devices (e.g.: All* (must have GPS) ) -->
|author=[[User:Technical writer 1]]
+
|dependencies= <!-- Any other/external dependencies e.g.: Google Maps Api v1.0 -->
 +
|signing= <!-- Empty or one of Self-Signed, DevCert, Manufacturer -->
 +
|capabilities= <!-- Capabilities required by the article/code example (e.g. Location, NetworkServices. -->
 +
|keywords= <!-- APIs, classes and methods (e.g. QSystemScreenSaver, QList, CBase -->
 +
|language= <!-- Language category code for non-English topics - e.g. Lang-Chinese -->
 +
|translated-by= <!-- [[User:XXXX]] -->
 +
|translated-from-title= <!-- Title only -->
 +
|translated-from-id= <!-- Id of translated revision -->
 +
|review-by= <!-- After re-review: [[User:username]] -->
 +
|review-timestamp= <!-- After re-review: YYYYMMDD -->
 +
|update-by= <!-- After significant update: [[User:username]]-->
 +
|update-timestamp= <!-- After significant update: YYYYMMDD -->
 +
|creationdate= 20070820
 +
|author= [[User:Technical writer 1]]
 +
<!-- The following are not in current metadata -->
 +
|subcategory=
 +
|id= KIJ000085
 
}}
 
}}
  
Line 40: Line 45:
 
MIDlet programmers should be aware that Java applications are just about the only application in the phone that uses the time zone. Thus, users might have incorrect time zone settings in their phone without being aware of it.
 
MIDlet programmers should be aware that Java applications are just about the only application in the phone that uses the time zone. Thus, users might have incorrect time zone settings in their phone without being aware of it.
  
[[Category:Known Issue]][[Category:Java ME]][[Category:S60 2nd Edition]]
+
[[Category:Known Issue]][[Category:Java ME]][[Category:S60 2nd Edition (initial release)]]

Revision as of 07:02, 30 March 2012

Article Metadata
Tested with
Devices(s): Nokia 6600
Compatibility
Platform(s): S60 2nd Edition
S60 2nd Edition (initial release)
Article
Created: User:Technical writer 1 (20 Aug 2007)
Last edited: hamishwillee (30 Mar 2012)

Description

CLDC 1.0 specification requires the method System.currentTimeMillis() to return the time in UTC (GMT).

Because some earlier phone models supported only time zone UTC, MIDlet programmers did not always take the difference between UTC and local time into account. MIDlets did work correctly assuming that the returned value was in local time, without even checking time zone settings.

In the Nokia 6600 device such existing MIDlets might behave differently, using UTC instead of local time as expected in many use cases.

Solution

Use a Calendar object to get the local time.

Calendar calendar = Calendar.getInstance() ;  // uses default TimeZone
Calendar.setTime( new Date( System.currentTimeMillis()) ;

Note: The phone user can set the time zone as follows:

1. By turning the automatic time update on. This is a network service and is not supported in all networks.

2. By setting the time zone manually in the Clock application or under Settings / Date & Time.

MIDlet programmers should be aware that Java applications are just about the only application in the phone that uses the time zone. Thus, users might have incorrect time zone settings in their phone without being aware of it.

48 page views in the last 30 days.