I'm working on Android application, and I want to convert local time (device time) into UTC and save it in database. After retrieving it from database I have to convert it again and display in the device's time zone. Can anyone suggest how to do this in Java?
I converted local time to GMT/UTC and vice versa using these two methods and this works fine without any problem for me.
public static Date localToGMT() {
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
Date gmt = new Date(sdf.format(date));
return gmt;
}
pass the GMT/UTC date which you want to convert into device local time to this method:
public static Date gmttoLocalDate(Date date) {
String timeZone = Calendar.getInstance().getTimeZone().getID();
Date local = new Date(date.getTime() + TimeZone.getTimeZone(timeZone).getOffset(date.getTime()));
return local
}