你也可以使用android.os.SystemClock。 例如，SystemClock.elapsedRealtime()将在手机处于睡眠状态时为您提供更准确的时间读数。

这是一个获取日期和时间的有用方法:

private String getDate(){
    DateFormat dfDate = new SimpleDateFormat("yyyy/MM/dd");
    String date=dfDate.format(Calendar.getInstance().getTime());
    DateFormat dfTime = new SimpleDateFormat("HH:mm");
    String time = dfTime.format(Calendar.getInstance().getTime());
    return date + " " + time;
}

你可以调用这个方法来获取当前的日期和时间值:

2017/01//09 19:23

Date todayDate = new Date();
todayDate.getDay();
todayDate.getHours();
todayDate.getMinutes();
todayDate.getMonth();
todayDate.getTime();

试试这个

String mytime = (DateFormat.format("dd-MM-yyyy hh:mm:ss", new java.util.Date()).toString());

    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
    Calendar cal = Calendar.getInstance();
    System.out.println("time => " + dateFormat.format(cal.getTime()));

    String time_str = dateFormat.format(cal.getTime());

    String[] s = time_str.split(" ");

    for (int i = 0; i < s.length; i++) {
         System.out.println("date  => " + s[i]);
    }

    int year_sys = Integer.parseInt(s[0].split("/")[0]);
    int month_sys = Integer.parseInt(s[0].split("/")[1]);
    int day_sys = Integer.parseInt(s[0].split("/")[2]);

    int hour_sys = Integer.parseInt(s[1].split(":")[0]);
    int min_sys = Integer.parseInt(s[1].split(":")[1]);

    System.out.println("year_sys  => " + year_sys);
    System.out.println("month_sys  => " + month_sys);
    System.out.println("day_sys  => " + day_sys);

    System.out.println("hour_sys  => " + hour_sys);
    System.out.println("min_sys  => " + min_sys);

你可以使用以下代码:

Calendar c = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String strDate = sdf.format(c.getTime());

输出:

2014-11-11 00:47:55

您还可以从这里获得SimpleDateFormat的更多格式化选项。