在Android中设置日期和所需时间

 Date date = new Date(); Calendar calendar = Calendar.getInstance(); calendar.setTime(date); calendar.set(Calendar.HOUR_OF_DAY, 6);// for 6 hour calendar.set(Calendar.MINUTE, 0);// for 0 min calendar.set(Calendar.SECOND, 0);// for 0 sec System.out.println(calendar.getTime());// print 'Mon Mar 28 06:00:00 ALMT 2016'