public String format(Calendar calendar,Calendar smscCalendar){
  if (calendar == null || smscCalendar == null) {
    return null;
  }
  long diffTimeInMillis=calendar.getTimeInMillis() - smscCalendar.getTimeInMillis();
  if (diffTimeInMillis < 0) {
    throw new IllegalArgumentException("The requested relative time has already past.");
  }
  Calendar offsetEpoch=Calendar.getInstance(utcTimeZone);
  offsetEpoch.setTimeInMillis(diffTimeInMillis);
  int years=offsetEpoch.get(Calendar.YEAR) - 1970;
  int months=offsetEpoch.get(Calendar.MONTH);
  int days=offsetEpoch.get(Calendar.DAY_OF_MONTH) - 1;
  int hours=offsetEpoch.get(Calendar.HOUR_OF_DAY);
  int minutes=offsetEpoch.get(Calendar.MINUTE);
  int seconds=offsetEpoch.get(Calendar.SECOND);
  if (years >= 100) {
    throw new IllegalArgumentException("The requested relative time is more then a century (" + years + " years).");
  }
  return format(years,months,days,hours,minutes,seconds);
}

public String format ( Calendar calendar , Calendar smscCalendar ) { if ( calendar == null || smscCalendar == null ) { return null ; } long diffTimeInMillis = calendar . getTimeInMillis ( ) - smscCalendar . getTimeInMillis ( ) ; if ( diffTimeInMillis < 0 ) { throw new IllegalArgumentException ( "The requested relative time has already past." ) ; } Calendar offsetEpoch = Calendar . getInstance ( utcTimeZone ) ; offsetEpoch . setTimeInMillis ( diffTimeInMillis ) ; int years = offsetEpoch . get ( Calendar . YEAR ) - 1970 ; int months = offsetEpoch . get ( Calendar . MONTH ) ; int days = offsetEpoch . get ( Calendar . DAY_OF_MONTH ) - 1 ; int hours = offsetEpoch . get ( Calendar . HOUR_OF_DAY ) ; int minutes = offsetEpoch . get ( Calendar . MINUTE ) ; int seconds = offsetEpoch . get ( Calendar . SECOND ) ; if ( years >= 100 ) { throw new IllegalArgumentException ( "The requested relative time is more then a century (" + years + " years)." ) ; } return format ( years , months , days , hours , minutes , seconds ) ; }
return the relative time from the calendar datetime against the smsc datetime .
