[转] android 日期时间格式变换

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android日期时间格式转换：

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private static int flagsDate = DateUtils.FORMAT_SHOW_DATE;private static int flagsTime = DateUtils.FORMAT_SHOW_TIME ;private static int flagsWeek = DateUtils.FORMAT_SHOW_WEEKDAY;String dateStr = (String)DateUtils.formatDateTime(context, System.currentTimeMillis(), flagsDate);//5月11日String timeStr = (String)DateUtils.formatDateTime(context, System.currentTimeMillis(), flagsTime);//16：40String weekStr = (String)DateUtils.formatDateTime(context, System.currentTimeMillis(), flagsWeek);//星期二

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12小时格式时，获取上午还是下午：

String smPmStr = DateUtils.getAMPMString(Calendar.getInstance().get(Calendar.AM_PM));//上午（下午）

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12小时时间格式时，只显示时间，不显示“上午“这样的字符串：

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private final static String M12 = "h:mm";private final static String M24 = "kk:mm";formatTime = android.text.format.DateFormat.is24HourFormat(context)? M24 : M12;String timeStr = (String) DateFormat.format(formatTime,System.currentTimeMillis());

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?将系统当前事件，转化为所需格式：

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long dateTaken = System.currentTimeMillis();if (dateTaken != 0) {        String datetime = DateFormat.format("yyyy:MM:dd kk:mm:ss", dateTaken).toString();        Log.e(TAG,"datetime : " +  datetime);                }

?如果为今天，则显示时间，如果不是今天则显示日期：

private String getDate(long dateTime)	    {	    	int flags = 0;			String date = "";						if (DateUtils.isToday(dateTime))			{				flags = DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_24HOUR;				date = (String)DateUtils.formatDateTime(mContext, dateTime, flags);			} 			else			{				flags = DateUtils.FORMAT_SHOW_DATE;				date = (String)DateUtils.formatDateTime(mContext, dateTime, flags);			}	        return date;	    }

?在源码短信息模块中MessageUtils.java中有这样一个函数，与上面的功能相同：

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);    }

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转自http://blog.csdn.net/dany1202/article/details/6164322

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