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DateUtils.javaAPI DocAndroid 5.1 API39685Thu Mar 12 22:22:10 GMT 2015android.text.format

DateUtils

public class DateUtils extends Object
This class contains various date-related utilities for creating text for things like elapsed time and date ranges, strings for days of the week and months, and AM/PM text etc.

Fields Summary
private static final Object
sLock
private static android.content.res.Configuration
sLastConfig
private static String
sElapsedFormatMMSS
private static String
sElapsedFormatHMMSS
public static final long
SECOND_IN_MILLIS
public static final long
MINUTE_IN_MILLIS
public static final long
HOUR_IN_MILLIS
public static final long
DAY_IN_MILLIS
public static final long
WEEK_IN_MILLIS
public static final long
YEAR_IN_MILLIS
This constant is actually the length of 364 days, not of a year!
public static final int
FORMAT_SHOW_TIME
public static final int
FORMAT_SHOW_WEEKDAY
public static final int
FORMAT_SHOW_YEAR
public static final int
FORMAT_NO_YEAR
public static final int
FORMAT_SHOW_DATE
public static final int
FORMAT_NO_MONTH_DAY
public static final int
FORMAT_12HOUR
public static final int
FORMAT_24HOUR
public static final int
FORMAT_CAP_AMPM
public static final int
FORMAT_NO_NOON
public static final int
FORMAT_CAP_NOON
public static final int
FORMAT_NO_MIDNIGHT
public static final int
FORMAT_CAP_MIDNIGHT
public static final int
FORMAT_UTC
public static final int
FORMAT_ABBREV_TIME
public static final int
FORMAT_ABBREV_WEEKDAY
public static final int
FORMAT_ABBREV_MONTH
public static final int
FORMAT_NUMERIC_DATE
public static final int
FORMAT_ABBREV_RELATIVE
public static final int
FORMAT_ABBREV_ALL
public static final int
FORMAT_CAP_NOON_MIDNIGHT
public static final int
FORMAT_NO_NOON_MIDNIGHT
public static final String
HOUR_MINUTE_24
This is not actually the preferred 24-hour date format in all locales.
public static final String
MONTH_FORMAT
public static final String
ABBREV_MONTH_FORMAT
This is not actually a useful month name in all locales.
public static final String
NUMERIC_MONTH_FORMAT
public static final String
MONTH_DAY_FORMAT
public static final String
YEAR_FORMAT
public static final String
YEAR_FORMAT_TWO_DIGITS
public static final String
WEEKDAY_FORMAT
public static final String
ABBREV_WEEKDAY_FORMAT
public static final int[]
sameYearTable
public static final int[]
sameMonthTable
public static final int
LENGTH_LONG
Request the full spelled-out name. For use with the 'abbrev' parameter of {@link #getDayOfWeekString} and {@link #getMonthString}.
public static final int
LENGTH_MEDIUM
Request an abbreviated version of the name. For use with the 'abbrev' parameter of {@link #getDayOfWeekString} and {@link #getMonthString}.
public static final int
LENGTH_SHORT
Request a shorter abbreviated version of the name. For use with the 'abbrev' parameter of {@link #getDayOfWeekString} and {@link #getMonthString}.
public static final int
LENGTH_SHORTER
Request an even shorter abbreviated version of the name. Do not use this. Currently this will always return the same result as {@link #LENGTH_SHORT}.
public static final int
LENGTH_SHORTEST
Request an even shorter abbreviated version of the name. For use with the 'abbrev' parameter of {@link #getDayOfWeekString} and {@link #getMonthString}.
private static Time
sNowTime
private static Time
sThenTime
Constructors Summary
Methods Summary
public static java.lang.StringformatDateRange(android.content.Context context, long startMillis, long endMillis, int flags)
Formats a date or a time range according to the local conventions.

Note that this is a convenience method. Using it involves creating an internal {@link java.util.Formatter} instance on-the-fly, which is somewhat costly in terms of memory and time. This is probably acceptable if you use the method only rarely, but if you rely on it for formatting a large number of dates, consider creating and reusing your own {@link java.util.Formatter} instance and use the version of {@link #formatDateRange(Context, long, long, int) formatDateRange} that takes a {@link java.util.Formatter}.

param
context the context is required only if the time is shown
param
startMillis the start time in UTC milliseconds
param
endMillis the end time in UTC milliseconds
param
flags a bit mask of options See {@link #formatDateRange(Context, Formatter, long, long, int, String) formatDateRange}
return
a string containing the formatted date/time range.

        Formatter f = new Formatter(new StringBuilder(50), Locale.getDefault());
        return formatDateRange(context, f, startMillis, endMillis, flags).toString();
public static java.util.FormatterformatDateRange(android.content.Context context, java.util.Formatter formatter, long startMillis, long endMillis, int flags)
Formats a date or a time range according to the local conventions.

Note that this is a convenience method for formatting the date or time range in the local time zone. If you want to specify the time zone please use {@link #formatDateRange(Context, Formatter, long, long, int, String) formatDateRange}.

param
context the context is required only if the time is shown
param
formatter the Formatter used for formatting the date range. Note: be sure to call setLength(0) on StringBuilder passed to the Formatter constructor unless you want the results to accumulate.
param
startMillis the start time in UTC milliseconds
param
endMillis the end time in UTC milliseconds
param
flags a bit mask of options See {@link #formatDateRange(Context, Formatter, long, long, int, String) formatDateRange}
return
a string containing the formatted date/time range.

        return formatDateRange(context, formatter, startMillis, endMillis, flags, null);
public static java.util.FormatterformatDateRange(android.content.Context context, java.util.Formatter formatter, long startMillis, long endMillis, int flags, java.lang.String timeZone)
Formats a date or a time range according to the local conventions.

Example output strings (date formats in these examples are shown using the US date format convention but that may change depending on the local settings):

  • 10:15am
  • 3:00pm - 4:00pm
  • 3pm - 4pm
  • 3PM - 4PM
  • 08:00 - 17:00
  • Oct 9
  • Tue, Oct 9
  • October 9, 2007
  • Oct 9 - 10
  • Oct 9 - 10, 2007
  • Oct 28 - Nov 3, 2007
  • Dec 31, 2007 - Jan 1, 2008
  • Oct 9, 8:00am - Oct 10, 5:00pm
  • 12/31/2007 - 01/01/2008

The flags argument is a bitmask of options from the following list:

  • FORMAT_SHOW_TIME
  • FORMAT_SHOW_WEEKDAY
  • FORMAT_SHOW_YEAR
  • FORMAT_SHOW_DATE
  • FORMAT_NO_MONTH_DAY
  • FORMAT_12HOUR
  • FORMAT_24HOUR
  • FORMAT_CAP_AMPM
  • FORMAT_NO_NOON
  • FORMAT_CAP_NOON
  • FORMAT_NO_MIDNIGHT
  • FORMAT_CAP_MIDNIGHT
  • FORMAT_UTC
  • FORMAT_ABBREV_TIME
  • FORMAT_ABBREV_WEEKDAY
  • FORMAT_ABBREV_MONTH
  • FORMAT_ABBREV_ALL
  • FORMAT_NUMERIC_DATE

If FORMAT_SHOW_TIME is set, the time is shown as part of the date range. If the start and end time are the same, then just the start time is shown.

If FORMAT_SHOW_WEEKDAY is set, then the weekday is shown.

If FORMAT_SHOW_YEAR is set, then the year is always shown. If FORMAT_SHOW_YEAR is not set, then the year is shown only if it is different from the current year, or if the start and end dates fall on different years.

Normally the date is shown unless the start and end day are the same. If FORMAT_SHOW_DATE is set, then the date is always shown, even for same day ranges.

If FORMAT_NO_MONTH_DAY is set, then if the date is shown, just the month name will be shown, not the day of the month. For example, "January, 2008" instead of "January 6 - 12, 2008".

If FORMAT_CAP_AMPM is set and 12-hour time is used, then the "AM" and "PM" are capitalized. You should not use this flag because in some locales these terms cannot be capitalized, and in many others it doesn't make sense to do so even though it is possible.

If FORMAT_NO_NOON is set and 12-hour time is used, then "12pm" is shown instead of "noon".

If FORMAT_CAP_NOON is set and 12-hour time is used, then "Noon" is shown instead of "noon". You should probably not use this flag because in many locales it will not make sense to capitalize the term.

If FORMAT_NO_MIDNIGHT is set and 12-hour time is used, then "12am" is shown instead of "midnight".

If FORMAT_CAP_MIDNIGHT is set and 12-hour time is used, then "Midnight" is shown instead of "midnight". You should probably not use this flag because in many locales it will not make sense to capitalize the term.

If FORMAT_12HOUR is set and the time is shown, then the time is shown in the 12-hour time format. You should not normally set this. Instead, let the time format be chosen automatically according to the system settings. If both FORMAT_12HOUR and FORMAT_24HOUR are set, then FORMAT_24HOUR takes precedence.

If FORMAT_24HOUR is set and the time is shown, then the time is shown in the 24-hour time format. You should not normally set this. Instead, let the time format be chosen automatically according to the system settings. If both FORMAT_12HOUR and FORMAT_24HOUR are set, then FORMAT_24HOUR takes precedence.

If FORMAT_UTC is set, then the UTC time zone is used for the start and end milliseconds unless a time zone is specified. If a time zone is specified it will be used regardless of the FORMAT_UTC flag.

If FORMAT_ABBREV_TIME is set and 12-hour time format is used, then the start and end times (if shown) are abbreviated by not showing the minutes if they are zero. For example, instead of "3:00pm" the time would be abbreviated to "3pm".

If FORMAT_ABBREV_WEEKDAY is set, then the weekday (if shown) is abbreviated to a 3-letter string.

If FORMAT_ABBREV_MONTH is set, then the month (if shown) is abbreviated to a 3-letter string.

If FORMAT_ABBREV_ALL is set, then the weekday and the month (if shown) are abbreviated to 3-letter strings.

If FORMAT_NUMERIC_DATE is set, then the date is shown in numeric format instead of using the name of the month. For example, "12/31/2008" instead of "December 31, 2008".

If the end date ends at 12:00am at the beginning of a day, it is formatted as the end of the previous day in two scenarios:

  • For single day events. This results in "8pm - midnight" instead of "Nov 10, 8pm - Nov 11, 12am".
  • When the time is not displayed. This results in "Nov 10 - 11" for an event with a start date of Nov 10 and an end date of Nov 12 at 00:00.

param
context the context is required only if the time is shown
param
formatter the Formatter used for formatting the date range. Note: be sure to call setLength(0) on StringBuilder passed to the Formatter constructor unless you want the results to accumulate.
param
startMillis the start time in UTC milliseconds
param
endMillis the end time in UTC milliseconds
param
flags a bit mask of options
param
timeZone the time zone to compute the string in. Use null for local or if the FORMAT_UTC flag is being used.
return
the formatter with the formatted date/time range appended to the string buffer.

        // If we're being asked to format a time without being explicitly told whether to use
        // the 12- or 24-hour clock, icu4c will fall back to the locale's preferred 12/24 format,
        // but we want to fall back to the user's preference.
        if ((flags & (FORMAT_SHOW_TIME | FORMAT_12HOUR | FORMAT_24HOUR)) == FORMAT_SHOW_TIME) {
            flags |= DateFormat.is24HourFormat(context) ? FORMAT_24HOUR : FORMAT_12HOUR;
        }

        String range = DateIntervalFormat.formatDateRange(startMillis, endMillis, flags, timeZone);
        try {
            formatter.out().append(range);
        } catch (IOException impossible) {
            throw new AssertionError(impossible);
        }
        return formatter;
public static java.lang.StringformatDateTime(android.content.Context context, long millis, int flags)
Formats a date or a time according to the local conventions. There are lots of options that allow the caller to control, for example, if the time is shown, if the day of the week is shown, if the month name is abbreviated, if noon is shown instead of 12pm, and so on. For the complete list of options, see the documentation for {@link #formatDateRange}.

Example output strings (date formats in these examples are shown using the US date format convention but that may change depending on the local settings):

  • 10:15am
  • 3:00pm
  • 3pm
  • 3PM
  • 08:00
  • 17:00
  • noon
  • Noon
  • midnight
  • Midnight
  • Oct 31
  • Oct 31, 2007
  • October 31, 2007
  • 10am, Oct 31
  • 17:00, Oct 31
  • Wed
  • Wednesday
  • 10am, Wed, Oct 31
  • Wed, Oct 31
  • Wednesday, Oct 31
  • Wed, Oct 31, 2007
  • Wed, October 31
  • 10/31/2007

param
context the context is required only if the time is shown
param
millis a point in time in UTC milliseconds
param
flags a bit mask of formatting options
return
a string containing the formatted date/time.

        return formatDateRange(context, millis, millis, flags);
public static java.lang.CharSequenceformatDuration(long millis)
Return given duration in a human-friendly format. For example, "4 minutes" or "1 second". Returns only largest meaningful unit of time, from seconds up to hours.

hide

        final Resources res = Resources.getSystem();
        if (millis >= HOUR_IN_MILLIS) {
            final int hours = (int) ((millis + 1800000) / HOUR_IN_MILLIS);
            return res.getQuantityString(
                    com.android.internal.R.plurals.duration_hours, hours, hours);
        } else if (millis >= MINUTE_IN_MILLIS) {
            final int minutes = (int) ((millis + 30000) / MINUTE_IN_MILLIS);
            return res.getQuantityString(
                    com.android.internal.R.plurals.duration_minutes, minutes, minutes);
        } else {
            final int seconds = (int) ((millis + 500) / SECOND_IN_MILLIS);
            return res.getQuantityString(
                    com.android.internal.R.plurals.duration_seconds, seconds, seconds);
        }
public static java.lang.StringformatElapsedTime(long elapsedSeconds)
Formats an elapsed time in the form "MM:SS" or "H:MM:SS" for display on the call-in-progress screen.

param
elapsedSeconds the elapsed time in seconds.

        return formatElapsedTime(null, elapsedSeconds);
public static java.lang.StringformatElapsedTime(java.lang.StringBuilder recycle, long elapsedSeconds)
Formats an elapsed time in a format like "MM:SS" or "H:MM:SS" (using a form suited to the current locale), similar to that used on the call-in-progress screen.

param
recycle {@link StringBuilder} to recycle, or null to use a temporary one.
param
elapsedSeconds the elapsed time in seconds.

        // Break the elapsed seconds into hours, minutes, and seconds.
        long hours = 0;
        long minutes = 0;
        long seconds = 0;
        if (elapsedSeconds >= 3600) {
            hours = elapsedSeconds / 3600;
            elapsedSeconds -= hours * 3600;
        }
        if (elapsedSeconds >= 60) {
            minutes = elapsedSeconds / 60;
            elapsedSeconds -= minutes * 60;
        }
        seconds = elapsedSeconds;

        // Create a StringBuilder if we weren't given one to recycle.
        // TODO: if we cared, we could have a thread-local temporary StringBuilder.
        StringBuilder sb = recycle;
        if (sb == null) {
            sb = new StringBuilder(8);
        } else {
            sb.setLength(0);
        }

        // Format the broken-down time in a locale-appropriate way.
        // TODO: use icu4c when http://unicode.org/cldr/trac/ticket/3407 is fixed.
        Formatter f = new Formatter(sb, Locale.getDefault());
        initFormatStrings();
        if (hours > 0) {
            return f.format(sElapsedFormatHMMSS, hours, minutes, seconds).toString();
        } else {
            return f.format(sElapsedFormatMMSS, minutes, seconds).toString();
        }
public static final java.lang.CharSequenceformatSameDayTime(long then, long now, int dateStyle, int timeStyle)
Format a date / time such that if the then is on the same day as now, it shows just the time and if it's a different day, it shows just the date.

The parameters dateFormat and timeFormat should each be one of {@link java.text.DateFormat#DEFAULT}, {@link java.text.DateFormat#FULL}, {@link java.text.DateFormat#LONG}, {@link java.text.DateFormat#MEDIUM} or {@link java.text.DateFormat#SHORT}

param
then the date to format
param
now the base time
param
dateStyle how to format the date portion.
param
timeStyle how to format the time portion.

        Calendar thenCal = new GregorianCalendar();
        thenCal.setTimeInMillis(then);
        Date thenDate = thenCal.getTime();
        Calendar nowCal = new GregorianCalendar();
        nowCal.setTimeInMillis(now);

        java.text.DateFormat f;

        if (thenCal.get(Calendar.YEAR) == nowCal.get(Calendar.YEAR)
                && thenCal.get(Calendar.MONTH) == nowCal.get(Calendar.MONTH)
                && thenCal.get(Calendar.DAY_OF_MONTH) == nowCal.get(Calendar.DAY_OF_MONTH)) {
            f = java.text.DateFormat.getTimeInstance(timeStyle);
        } else {
            f = java.text.DateFormat.getDateInstance(dateStyle);
        }
        return f.format(thenDate);
public static java.lang.StringgetAMPMString(int ampm)
Return a localized string for AM or PM.

param
ampm Either {@link Calendar#AM Calendar.AM} or {@link Calendar#PM Calendar.PM}.
throws
IndexOutOfBoundsException if the ampm is out of bounds.
return
Localized version of "AM" or "PM".
deprecated
Use {@link java.text.SimpleDateFormat} instead.

        return LocaleData.get(Locale.getDefault()).amPm[ampm - Calendar.AM];
public static java.lang.StringgetDayOfWeekString(int dayOfWeek, int abbrev)
Return a string for the day of the week.

param
dayOfWeek One of {@link Calendar#SUNDAY Calendar.SUNDAY}, {@link Calendar#MONDAY Calendar.MONDAY}, etc.
param
abbrev One of {@link #LENGTH_LONG}, {@link #LENGTH_SHORT}, {@link #LENGTH_MEDIUM}, or {@link #LENGTH_SHORTEST}. Note that in most languages, {@link #LENGTH_SHORT} will return the same as {@link #LENGTH_MEDIUM}. Undefined lengths will return {@link #LENGTH_MEDIUM} but may return something different in the future.
throws
IndexOutOfBoundsException if the dayOfWeek is out of bounds.
deprecated
Use {@link java.text.SimpleDateFormat} instead.


                                                                                                                                                                        
    
           
        LocaleData d = LocaleData.get(Locale.getDefault());
        String[] names;
        switch (abbrev) {
            case LENGTH_LONG:       names = d.longWeekdayNames;  break;
            case LENGTH_MEDIUM:     names = d.shortWeekdayNames; break;
            case LENGTH_SHORT:      names = d.shortWeekdayNames; break; // TODO
            case LENGTH_SHORTER:    names = d.shortWeekdayNames; break; // TODO
            case LENGTH_SHORTEST:   names = d.tinyWeekdayNames;  break;
            default:                names = d.shortWeekdayNames; break;
        }
        return names[dayOfWeek];
public static java.lang.StringgetMonthString(int month, int abbrev)
Return a localized string for the month of the year.

param
month One of {@link Calendar#JANUARY Calendar.JANUARY}, {@link Calendar#FEBRUARY Calendar.FEBRUARY}, etc.
param
abbrev One of {@link #LENGTH_LONG}, {@link #LENGTH_MEDIUM}, or {@link #LENGTH_SHORTEST}. Undefined lengths will return {@link #LENGTH_MEDIUM} but may return something different in the future.
return
Localized month of the year.
deprecated
Use {@link java.text.SimpleDateFormat} instead.

        LocaleData d = LocaleData.get(Locale.getDefault());
        String[] names;
        switch (abbrev) {
            case LENGTH_LONG:       names = d.longMonthNames;  break;
            case LENGTH_MEDIUM:     names = d.shortMonthNames; break;
            case LENGTH_SHORT:      names = d.shortMonthNames; break;
            case LENGTH_SHORTER:    names = d.shortMonthNames; break;
            case LENGTH_SHORTEST:   names = d.tinyMonthNames;  break;
            default:                names = d.shortMonthNames; break;
        }
        return names[month];
public static java.lang.CharSequencegetRelativeDateTimeString(android.content.Context c, long time, long minResolution, long transitionResolution, int flags)
Return string describing the elapsed time since startTime formatted like "[relative time/date], [time]".

Example output strings for the US date format.

  • 3 mins ago, 10:15 AM
  • yesterday, 12:20 PM
  • Dec 12, 4:12 AM
  • 11/14/2007, 8:20 AM

param
time some time in the past.
param
minResolution the minimum elapsed time (in milliseconds) to report when showing relative times. For example, a time 3 seconds in the past will be reported as "0 minutes ago" if this is set to {@link #MINUTE_IN_MILLIS}.
param
transitionResolution the elapsed time (in milliseconds) at which to stop reporting relative measurements. Elapsed times greater than this resolution will default to normal date formatting. For example, will transition from "6 days ago" to "Dec 12" when using {@link #WEEK_IN_MILLIS}.

        Resources r = Resources.getSystem();

        long now = System.currentTimeMillis();
        long duration = Math.abs(now - time);

        // getRelativeTimeSpanString() doesn't correctly format relative dates
        // above a week or exact dates below a day, so clamp
        // transitionResolution as needed.
        if (transitionResolution > WEEK_IN_MILLIS) {
            transitionResolution = WEEK_IN_MILLIS;
        } else if (transitionResolution < DAY_IN_MILLIS) {
            transitionResolution = DAY_IN_MILLIS;
        }

        CharSequence timeClause = formatDateRange(c, time, time, FORMAT_SHOW_TIME);

        String result;
        if (duration < transitionResolution) {
            CharSequence relativeClause = getRelativeTimeSpanString(time, now, minResolution, flags);
            result = r.getString(com.android.internal.R.string.relative_time, relativeClause, timeClause);
        } else {
            CharSequence dateClause = getRelativeTimeSpanString(c, time, false);
            result = r.getString(com.android.internal.R.string.date_time, dateClause, timeClause);
        }

        return result;
private static final java.lang.StringgetRelativeDayString(android.content.res.Resources r, long day, long today)
Returns a string describing a day relative to the current day. For example if the day is today this function returns "Today", if the day was a week ago it returns "7 days ago", and if the day is in 2 weeks it returns "in 14 days".

param
r the resources
param
day the relative day to describe in UTC milliseconds
param
today the current time in UTC milliseconds

        Locale locale = r.getConfiguration().locale;
        if (locale == null) {
            locale = Locale.getDefault();
        }

        // TODO: use TimeZone.getOffset instead.
        Time startTime = new Time();
        startTime.set(day);
        int startDay = Time.getJulianDay(day, startTime.gmtoff);

        Time currentTime = new Time();
        currentTime.set(today);
        int currentDay = Time.getJulianDay(today, currentTime.gmtoff);

        int days = Math.abs(currentDay - startDay);
        boolean past = (today > day);

        // TODO: some locales name other days too, such as de_DE's "Vorgestern" (today - 2).
        if (days == 1) {
            if (past) {
                return LocaleData.get(locale).yesterday;
            } else {
                return LocaleData.get(locale).tomorrow;
            }
        } else if (days == 0) {
            return LocaleData.get(locale).today;
        }

        int resId;
        if (past) {
            resId = com.android.internal.R.plurals.num_days_ago;
        } else {
            resId = com.android.internal.R.plurals.in_num_days;
        }

        String format = r.getQuantityString(resId, days);
        return String.format(format, days);
public static java.lang.CharSequencegetRelativeTimeSpanString(android.content.Context c, long millis, boolean withPreposition)

return
a relative time string to display the time expressed by millis. Times are counted starting at midnight, which means that assuming that the current time is March 31st, 0:30:
  • "millis=0:10 today" will be displayed as "0:10"
  • "millis=11:30pm the day before" will be displayed as "Mar 30"
If the given millis is in a different year, then the full date is returned in numeric format (e.g., "10/12/2008").
param
withPreposition If true, the string returned will include the correct preposition ("at 9:20am", "on 10/12/2008" or "on May 29").


        String result;
        long now = System.currentTimeMillis();
        long span = Math.abs(now - millis);

        synchronized (DateUtils.class) {
            if (sNowTime == null) {
                sNowTime = new Time();
            }

            if (sThenTime == null) {
                sThenTime = new Time();
            }

            sNowTime.set(now);
            sThenTime.set(millis);

            int prepositionId;
            if (span < DAY_IN_MILLIS && sNowTime.weekDay == sThenTime.weekDay) {
                // Same day
                int flags = FORMAT_SHOW_TIME;
                result = formatDateRange(c, millis, millis, flags);
                prepositionId = R.string.preposition_for_time;
            } else if (sNowTime.year != sThenTime.year) {
                // Different years
                int flags = FORMAT_SHOW_DATE | FORMAT_SHOW_YEAR | FORMAT_NUMERIC_DATE;
                result = formatDateRange(c, millis, millis, flags);

                // This is a date (like "10/31/2008" so use the date preposition)
                prepositionId = R.string.preposition_for_date;
            } else {
                // Default
                int flags = FORMAT_SHOW_DATE | FORMAT_ABBREV_MONTH;
                result = formatDateRange(c, millis, millis, flags);
                prepositionId = R.string.preposition_for_date;
            }
            if (withPreposition) {
                Resources res = c.getResources();
                result = res.getString(prepositionId, result);
            }
        }
        return result;
public static java.lang.CharSequencegetRelativeTimeSpanString(android.content.Context c, long millis)
Convenience function to return relative time string without preposition.

param
c context for resources
param
millis time in milliseconds
return
{@link CharSequence} containing relative time.
see
#getRelativeTimeSpanString(Context, long, boolean)

        return getRelativeTimeSpanString(c, millis, false /* no preposition */);
public static java.lang.CharSequencegetRelativeTimeSpanString(long startTime)
Returns a string describing the elapsed time since startTime.

param
startTime some time in the past.
return
a String object containing the elapsed time.
see
#getRelativeTimeSpanString(long, long, long)

        return getRelativeTimeSpanString(startTime, System.currentTimeMillis(), MINUTE_IN_MILLIS);
public static java.lang.CharSequencegetRelativeTimeSpanString(long time, long now, long minResolution)
Returns a string describing 'time' as a time relative to 'now'.

Time spans in the past are formatted like "42 minutes ago". Time spans in the future are formatted like "in 42 minutes".

param
time the time to describe, in milliseconds
param
now the current time in milliseconds
param
minResolution the minimum timespan to report. For example, a time 3 seconds in the past will be reported as "0 minutes ago" if this is set to MINUTE_IN_MILLIS. Pass one of 0, MINUTE_IN_MILLIS, HOUR_IN_MILLIS, DAY_IN_MILLIS, WEEK_IN_MILLIS

        int flags = FORMAT_SHOW_DATE | FORMAT_SHOW_YEAR | FORMAT_ABBREV_MONTH;
        return getRelativeTimeSpanString(time, now, minResolution, flags);
public static java.lang.CharSequencegetRelativeTimeSpanString(long time, long now, long minResolution, int flags)
Returns a string describing 'time' as a time relative to 'now'.

Time spans in the past are formatted like "42 minutes ago". Time spans in the future are formatted like "in 42 minutes".

Can use {@link #FORMAT_ABBREV_RELATIVE} flag to use abbreviated relative times, like "42 mins ago".

param
time the time to describe, in milliseconds
param
now the current time in milliseconds
param
minResolution the minimum timespan to report. For example, a time 3 seconds in the past will be reported as "0 minutes ago" if this is set to MINUTE_IN_MILLIS. Pass one of 0, MINUTE_IN_MILLIS, HOUR_IN_MILLIS, DAY_IN_MILLIS, WEEK_IN_MILLIS
param
flags a bit mask of formatting options, such as {@link #FORMAT_NUMERIC_DATE} or {@link #FORMAT_ABBREV_RELATIVE}

        Resources r = Resources.getSystem();
        boolean abbrevRelative = (flags & (FORMAT_ABBREV_RELATIVE | FORMAT_ABBREV_ALL)) != 0;

        boolean past = (now >= time);
        long duration = Math.abs(now - time);

        int resId;
        long count;
        if (duration < MINUTE_IN_MILLIS && minResolution < MINUTE_IN_MILLIS) {
            count = duration / SECOND_IN_MILLIS;
            if (past) {
                if (abbrevRelative) {
                    resId = com.android.internal.R.plurals.abbrev_num_seconds_ago;
                } else {
                    resId = com.android.internal.R.plurals.num_seconds_ago;
                }
            } else {
                if (abbrevRelative) {
                    resId = com.android.internal.R.plurals.abbrev_in_num_seconds;
                } else {
                    resId = com.android.internal.R.plurals.in_num_seconds;
                }
            }
        } else if (duration < HOUR_IN_MILLIS && minResolution < HOUR_IN_MILLIS) {
            count = duration / MINUTE_IN_MILLIS;
            if (past) {
                if (abbrevRelative) {
                    resId = com.android.internal.R.plurals.abbrev_num_minutes_ago;
                } else {
                    resId = com.android.internal.R.plurals.num_minutes_ago;
                }
            } else {
                if (abbrevRelative) {
                    resId = com.android.internal.R.plurals.abbrev_in_num_minutes;
                } else {
                    resId = com.android.internal.R.plurals.in_num_minutes;
                }
            }
        } else if (duration < DAY_IN_MILLIS && minResolution < DAY_IN_MILLIS) {
            count = duration / HOUR_IN_MILLIS;
            if (past) {
                if (abbrevRelative) {
                    resId = com.android.internal.R.plurals.abbrev_num_hours_ago;
                } else {
                    resId = com.android.internal.R.plurals.num_hours_ago;
                }
            } else {
                if (abbrevRelative) {
                    resId = com.android.internal.R.plurals.abbrev_in_num_hours;
                } else {
                    resId = com.android.internal.R.plurals.in_num_hours;
                }
            }
        } else if (duration < WEEK_IN_MILLIS && minResolution < WEEK_IN_MILLIS) {
            return getRelativeDayString(r, time, now);
        } else {
            // We know that we won't be showing the time, so it is safe to pass
            // in a null context.
            return formatDateRange(null, time, time, flags);
        }

        String format = r.getQuantityString(resId, (int) count);
        return String.format(format, count);
private static voidinitFormatStrings()

        synchronized (sLock) {
            initFormatStringsLocked();
        }
private static voidinitFormatStringsLocked()

        Resources r = Resources.getSystem();
        Configuration cfg = r.getConfiguration();
        if (sLastConfig == null || !sLastConfig.equals(cfg)) {
            sLastConfig = cfg;
            sElapsedFormatMMSS = r.getString(com.android.internal.R.string.elapsed_time_short_format_mm_ss);
            sElapsedFormatHMMSS = r.getString(com.android.internal.R.string.elapsed_time_short_format_h_mm_ss);
        }
public static booleanisToday(long when)

return
true if the supplied when is today else false

        Time time = new Time();
        time.set(when);

        int thenYear = time.year;
        int thenMonth = time.month;
        int thenMonthDay = time.monthDay;

        time.set(System.currentTimeMillis());
        return (thenYear == time.year)
                && (thenMonth == time.month)
                && (thenMonthDay == time.monthDay);