Android编程之短信列表的时间显示实例分析

public static String formatTimeStampString(Context context, long when) {  return formatTimeStampString(context, when, false);}public static String formatTimeStampString(Context context, long when, boolean fullFormat) {  Time then = new Time();  then.set(when);  Time now = new Time();  now.setToNow();  // Basic settings for formatDateTime() we want for all cases.  int format_flags = DateUtils.FORMAT_NO_NOON_MIDNIGHT |       DateUtils.FORMAT_ABBREV_ALL |       DateUtils.FORMAT_CAP_AMPM;  // If the message is from a different year, show the date and year.  if (then.year != now.year) {   format_flags |= DateUtils.FORMAT_SHOW_YEAR | DateUtils.FORMAT_SHOW_DATE;  } else if (then.yearDay != now.yearDay) {   // If it is from a different day than today, show only the date.   format_flags |= DateUtils.FORMAT_SHOW_DATE;  } else {   // Otherwise, if the message is from today, show the time.   format_flags |= DateUtils.FORMAT_SHOW_TIME;  }  // If the caller has asked for full details, make sure to show the date  // and time no matter what we've determined above (but still make showing  // the year only happen if it is a different year from today).  if (fullFormat) {   format_flags |= (DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_TIME);  }  return DateUtils.formatDateTime(context, when, format_flags);}