此代码是Kotlin版本。我有另一个想法，添加一个随机洗牌整数在最后一位给出方差纪元时间。

芬兰湾的科特林版本

val randomVariance = (0..100).shuffled().first()
val currentEpoch = (System.currentTimeMilis()/1000) + randomVariance

val deltaEpoch = oldEpoch - currentEpoch

我认为使用这个代码会更好，然后依赖于android版本26或更高

来自开发者博客:

System.currentTimeMillis() is the standard "wall" clock (time and date) expressing milliseconds since the epoch. The wall clock can be set by the user or the phone network (see setCurrentTimeMillis(long)), so the time may jump backwards or forwards unpredictably. This clock should only be used when correspondence with real-world dates and times is important, such as in a calendar or alarm clock application. Interval or elapsed time measurements should use a different clock. If you are using System.currentTimeMillis(), consider listening to the ACTION_TIME_TICK, ACTION_TIME_CHANGED and ACTION_TIMEZONE_CHANGED Intent broadcasts to find out when the time changes.

你可以使用SimpleDateFormat类:

SimpleDateFormat s = new SimpleDateFormat("ddMMyyyyhhmmss");
String format = s.format(new Date());

使用以下方法获取当前时间戳。这对我来说很有效。

/**
 * 
 * @return yyyy-MM-dd HH:mm:ss formate date as string
 */
public static String getCurrentTimeStamp(){
    try {

        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String currentDateTime = dateFormat.format(new Date()); // Find todays date

        return currentDateTime;
    } catch (Exception e) {
        e.printStackTrace();

        return null;
    }
}

Kotlin解决方案:

val nowInEpoch = Instant.now().epochSecond

确保你的最低SDK版本是26。

我建议使用Hits的答案，但添加一个Locale格式，这是如何Android 开发人员建议:

try {
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault());
        return dateFormat.format(new Date()); // Find todays date
    } catch (Exception e) {
        e.printStackTrace();

        return null;
    }