android - Is setTimeZone method is device independent? -


my app heavily dependent on time. if set time zone using below code , user device time/date not set correctly work correctly , return correct time? 

calendar calendar = calendar.getinstance();         simpledateformat sdf = new simpledateformat("dd-mmm-yyyy hh:mm:ss z");  sdf.settimezone(timezone.gettimezone("america/los_angeles"));

this not if device time off. setting timezone, telling formatter display (what device thinks is) current time offset of +7/+8 hours.


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