安卓如何使时区看起来像GMT-0X:00

Question

如何输出"GMT-0X:00"（X-数字）？

Answer 1

Calendar cal = Calendar.getInstance(locale);
// or Calendar cal = Calendar.getInstance(timezone);
int zoneOffset = cal.get(Calendar.ZONE_OFFSET);
// eg: "-0700"
String timezoneStr = new SimpleDateFormat("Z").format( cal.getTime() );