java - 如何在java/android中获得完美的UTC时间？

Question

我试图在我的应用程序中获取 UTC 时间，但不幸的是每次我获取当前模拟器日期和时间而不是 UTC 时。

尝试过，

1. Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));

2. ZonedDateTime utcTime = ZonedDateTime.now(ZoneOffset.UTC);

3. DateTime now = DateTime.now(DateTimeZone.UTC);

我的代码:

//create UTC time
    Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
    System.out.println("DATETIME ==> " + cal.getTime());
    ZonedDateTime utcTime = ZonedDateTime.now(ZoneOffset.UTC);
    System.out.println("DATETIME = " + utcTime.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
    DateTime now = DateTime.now(DateTimeZone.UTC);
    System.out.println("DATETIME = " + now);

非常感谢任何帮助。

Answer 1

试试这个代码:

private String getCurrentDateTimeAccordingToUTC(String format) {
    Date date = new Date(System.currentTimeMillis());
    SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format);
    simpleDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
    return simpleDateFormat.format(date);
}


String date = getCurrentDateTimeAccordingToUTC("dd-MM-yyyy hh:mm:ss a");
Log.e("date--","inUTC--:"+date);