我想将日期从我当前的时区转换为 UTC。
我无法理解结果。
代码:
public static String convertToUTC(String dateStr) throws ParseException
{
Log.i("myDateFunctions", "the input param is:"+dateStr);
String uTCDateStr;
Date pickedDate = stringToDate(dateStr, "yyyy-MM-dd HH:mm:ss");
Log.i("myDateFunctions", "the input param after it is converted to Date:"+pickedDate);
TimeZone tz = TimeZone.getDefault();
Date now = new Date();
Log.i("myDateFunctions:", "my current Timezone:"+tz.getDisplayName()+" +"+(tz.getOffset(now.getTime()) / 3600000));
// Convert to UTC
SimpleDateFormat converter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
converter.setTimeZone(TimeZone.getTimeZone("UTC"));
uTCDateStr = converter.format(pickedDate);
Log.i("myDateFunctions", "the output, after i converted to UTC timezone:"+uTCDateStr);
return uTCDateStr;
}
LogCat 结果是:
03-29 20:31:46.804: I/myDateFunctions(18413): the input param is:2014-04-29 20:00:00
03-29 20:31:47.005: I/myDateFunctions(18413): the input param after it is converted to Date:Tue Apr 29 20:00:00 CEST 2014
03-29 20:31:47.005: I/myDateFunctions:(18413): my current Timezone:Central European Time +1
03-29 20:31:47.005: I/myDateFunctions(18413): the output, after i converted to UTC timezone:2014-04-29 18:00:00
如您所见: 我的时区是 CET (GMT+1)
那为什么如果我的输入是 20:00 我会在 18:00 而不是 19:00 回来？
最佳答案
问题是夏令时。 UTC 没有它，如果你有，它会在一年中的部分时间增加 1 小时的差异。
关于android - 从当前时区转换为 UTC 减量 2 小时而不是 1 小时，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22735863/