Android example source code file (DateUtils.java)
The DateUtils.java Android example source code/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.text.format;
import com.android.internal.R;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import java.util.Calendar;
import java.util.Date;
import java.util.Formatter;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;
/**
* 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.
*/
public class DateUtils
{
private static final Object sLock = new Object();
private static final int[] sDaysLong = new int[] {
com.android.internal.R.string.day_of_week_long_sunday,
com.android.internal.R.string.day_of_week_long_monday,
com.android.internal.R.string.day_of_week_long_tuesday,
com.android.internal.R.string.day_of_week_long_wednesday,
com.android.internal.R.string.day_of_week_long_thursday,
com.android.internal.R.string.day_of_week_long_friday,
com.android.internal.R.string.day_of_week_long_saturday,
};
private static final int[] sDaysMedium = new int[] {
com.android.internal.R.string.day_of_week_medium_sunday,
com.android.internal.R.string.day_of_week_medium_monday,
com.android.internal.R.string.day_of_week_medium_tuesday,
com.android.internal.R.string.day_of_week_medium_wednesday,
com.android.internal.R.string.day_of_week_medium_thursday,
com.android.internal.R.string.day_of_week_medium_friday,
com.android.internal.R.string.day_of_week_medium_saturday,
};
private static final int[] sDaysShort = new int[] {
com.android.internal.R.string.day_of_week_short_sunday,
com.android.internal.R.string.day_of_week_short_monday,
com.android.internal.R.string.day_of_week_short_tuesday,
com.android.internal.R.string.day_of_week_short_wednesday,
com.android.internal.R.string.day_of_week_short_thursday,
com.android.internal.R.string.day_of_week_short_friday,
com.android.internal.R.string.day_of_week_short_saturday,
};
private static final int[] sDaysShortest = new int[] {
com.android.internal.R.string.day_of_week_shortest_sunday,
com.android.internal.R.string.day_of_week_shortest_monday,
com.android.internal.R.string.day_of_week_shortest_tuesday,
com.android.internal.R.string.day_of_week_shortest_wednesday,
com.android.internal.R.string.day_of_week_shortest_thursday,
com.android.internal.R.string.day_of_week_shortest_friday,
com.android.internal.R.string.day_of_week_shortest_saturday,
};
private static final int[] sMonthsStandaloneLong = new int [] {
com.android.internal.R.string.month_long_standalone_january,
com.android.internal.R.string.month_long_standalone_february,
com.android.internal.R.string.month_long_standalone_march,
com.android.internal.R.string.month_long_standalone_april,
com.android.internal.R.string.month_long_standalone_may,
com.android.internal.R.string.month_long_standalone_june,
com.android.internal.R.string.month_long_standalone_july,
com.android.internal.R.string.month_long_standalone_august,
com.android.internal.R.string.month_long_standalone_september,
com.android.internal.R.string.month_long_standalone_october,
com.android.internal.R.string.month_long_standalone_november,
com.android.internal.R.string.month_long_standalone_december,
};
private static final int[] sMonthsLong = new int [] {
com.android.internal.R.string.month_long_january,
com.android.internal.R.string.month_long_february,
com.android.internal.R.string.month_long_march,
com.android.internal.R.string.month_long_april,
com.android.internal.R.string.month_long_may,
com.android.internal.R.string.month_long_june,
com.android.internal.R.string.month_long_july,
com.android.internal.R.string.month_long_august,
com.android.internal.R.string.month_long_september,
com.android.internal.R.string.month_long_october,
com.android.internal.R.string.month_long_november,
com.android.internal.R.string.month_long_december,
};
private static final int[] sMonthsMedium = new int [] {
com.android.internal.R.string.month_medium_january,
com.android.internal.R.string.month_medium_february,
com.android.internal.R.string.month_medium_march,
com.android.internal.R.string.month_medium_april,
com.android.internal.R.string.month_medium_may,
com.android.internal.R.string.month_medium_june,
com.android.internal.R.string.month_medium_july,
com.android.internal.R.string.month_medium_august,
com.android.internal.R.string.month_medium_september,
com.android.internal.R.string.month_medium_october,
com.android.internal.R.string.month_medium_november,
com.android.internal.R.string.month_medium_december,
};
private static final int[] sMonthsShortest = new int [] {
com.android.internal.R.string.month_shortest_january,
com.android.internal.R.string.month_shortest_february,
com.android.internal.R.string.month_shortest_march,
com.android.internal.R.string.month_shortest_april,
com.android.internal.R.string.month_shortest_may,
com.android.internal.R.string.month_shortest_june,
com.android.internal.R.string.month_shortest_july,
com.android.internal.R.string.month_shortest_august,
com.android.internal.R.string.month_shortest_september,
com.android.internal.R.string.month_shortest_october,
com.android.internal.R.string.month_shortest_november,
com.android.internal.R.string.month_shortest_december,
};
private static final int[] sAmPm = new int[] {
com.android.internal.R.string.am,
com.android.internal.R.string.pm,
};
private static Configuration sLastConfig;
private static java.text.DateFormat sStatusTimeFormat;
private static String sElapsedFormatMMSS;
private static String sElapsedFormatHMMSS;
private static final String FAST_FORMAT_HMMSS = "%1$d:%2$02d:%3$02d";
private static final String FAST_FORMAT_MMSS = "%1$02d:%2$02d";
private static final char TIME_PADDING = '0';
private static final char TIME_SEPARATOR = ':';
public static final long SECOND_IN_MILLIS = 1000;
public static final long MINUTE_IN_MILLIS = SECOND_IN_MILLIS * 60;
public static final long HOUR_IN_MILLIS = MINUTE_IN_MILLIS * 60;
public static final long DAY_IN_MILLIS = HOUR_IN_MILLIS * 24;
public static final long WEEK_IN_MILLIS = DAY_IN_MILLIS * 7;
/**
* This constant is actually the length of 364 days, not of a year!
*/
public static final long YEAR_IN_MILLIS = WEEK_IN_MILLIS * 52;
// The following FORMAT_* symbols are used for specifying the format of
// dates and times in the formatDateRange method.
public static final int FORMAT_SHOW_TIME = 0x00001;
public static final int FORMAT_SHOW_WEEKDAY = 0x00002;
public static final int FORMAT_SHOW_YEAR = 0x00004;
public static final int FORMAT_NO_YEAR = 0x00008;
public static final int FORMAT_SHOW_DATE = 0x00010;
public static final int FORMAT_NO_MONTH_DAY = 0x00020;
public static final int FORMAT_12HOUR = 0x00040;
public static final int FORMAT_24HOUR = 0x00080;
public static final int FORMAT_CAP_AMPM = 0x00100;
public static final int FORMAT_NO_NOON = 0x00200;
public static final int FORMAT_CAP_NOON = 0x00400;
public static final int FORMAT_NO_MIDNIGHT = 0x00800;
public static final int FORMAT_CAP_MIDNIGHT = 0x01000;
public static final int FORMAT_UTC = 0x02000;
public static final int FORMAT_ABBREV_TIME = 0x04000;
public static final int FORMAT_ABBREV_WEEKDAY = 0x08000;
public static final int FORMAT_ABBREV_MONTH = 0x10000;
public static final int FORMAT_NUMERIC_DATE = 0x20000;
public static final int FORMAT_ABBREV_RELATIVE = 0x40000;
public static final int FORMAT_ABBREV_ALL = 0x80000;
public static final int FORMAT_CAP_NOON_MIDNIGHT = (FORMAT_CAP_NOON | FORMAT_CAP_MIDNIGHT);
public static final int FORMAT_NO_NOON_MIDNIGHT = (FORMAT_NO_NOON | FORMAT_NO_MIDNIGHT);
// Date and time format strings that are constant and don't need to be
// translated.
/**
* This is not actually the preferred 24-hour date format in all locales.
*/
public static final String HOUR_MINUTE_24 = "%H:%M";
public static final String MONTH_FORMAT = "%B";
/**
* This is not actually a useful month name in all locales.
*/
public static final String ABBREV_MONTH_FORMAT = "%b";
public static final String NUMERIC_MONTH_FORMAT = "%m";
public static final String MONTH_DAY_FORMAT = "%-d";
public static final String YEAR_FORMAT = "%Y";
public static final String YEAR_FORMAT_TWO_DIGITS = "%g";
public static final String WEEKDAY_FORMAT = "%A";
public static final String ABBREV_WEEKDAY_FORMAT = "%a";
// This table is used to lookup the resource string id of a format string
// used for formatting a start and end date that fall in the same year.
// The index is constructed from a bit-wise OR of the boolean values:
// {showTime, showYear, showWeekDay}. For example, if showYear and
// showWeekDay are both true, then the index would be 3.
public static final int sameYearTable[] = {
com.android.internal.R.string.same_year_md1_md2,
com.android.internal.R.string.same_year_wday1_md1_wday2_md2,
com.android.internal.R.string.same_year_mdy1_mdy2,
com.android.internal.R.string.same_year_wday1_mdy1_wday2_mdy2,
com.android.internal.R.string.same_year_md1_time1_md2_time2,
com.android.internal.R.string.same_year_wday1_md1_time1_wday2_md2_time2,
com.android.internal.R.string.same_year_mdy1_time1_mdy2_time2,
com.android.internal.R.string.same_year_wday1_mdy1_time1_wday2_mdy2_time2,
// Numeric date strings
com.android.internal.R.string.numeric_md1_md2,
com.android.internal.R.string.numeric_wday1_md1_wday2_md2,
com.android.internal.R.string.numeric_mdy1_mdy2,
com.android.internal.R.string.numeric_wday1_mdy1_wday2_mdy2,
com.android.internal.R.string.numeric_md1_time1_md2_time2,
com.android.internal.R.string.numeric_wday1_md1_time1_wday2_md2_time2,
com.android.internal.R.string.numeric_mdy1_time1_mdy2_time2,
com.android.internal.R.string.numeric_wday1_mdy1_time1_wday2_mdy2_time2,
};
// This table is used to lookup the resource string id of a format string
// used for formatting a start and end date that fall in the same month.
// The index is constructed from a bit-wise OR of the boolean values:
// {showTime, showYear, showWeekDay}. For example, if showYear and
// showWeekDay are both true, then the index would be 3.
public static final int sameMonthTable[] = {
com.android.internal.R.string.same_month_md1_md2,
com.android.internal.R.string.same_month_wday1_md1_wday2_md2,
com.android.internal.R.string.same_month_mdy1_mdy2,
com.android.internal.R.string.same_month_wday1_mdy1_wday2_mdy2,
com.android.internal.R.string.same_month_md1_time1_md2_time2,
com.android.internal.R.string.same_month_wday1_md1_time1_wday2_md2_time2,
com.android.internal.R.string.same_month_mdy1_time1_mdy2_time2,
com.android.internal.R.string.same_month_wday1_mdy1_time1_wday2_mdy2_time2,
com.android.internal.R.string.numeric_md1_md2,
com.android.internal.R.string.numeric_wday1_md1_wday2_md2,
com.android.internal.R.string.numeric_mdy1_mdy2,
com.android.internal.R.string.numeric_wday1_mdy1_wday2_mdy2,
com.android.internal.R.string.numeric_md1_time1_md2_time2,
com.android.internal.R.string.numeric_wday1_md1_time1_wday2_md2_time2,
com.android.internal.R.string.numeric_mdy1_time1_mdy2_time2,
com.android.internal.R.string.numeric_wday1_mdy1_time1_wday2_mdy2_time2,
};
/**
* Request the full spelled-out name. For use with the 'abbrev' parameter of
* {@link #getDayOfWeekString} and {@link #getMonthString}.
*
* @more <p>
* e.g. "Sunday" or "January"
*/
public static final int LENGTH_LONG = 10;
/**
* Request an abbreviated version of the name. For use with the 'abbrev'
* parameter of {@link #getDayOfWeekString} and {@link #getMonthString}.
*
* @more <p>
* e.g. "Sun" or "Jan"
*/
public static final int LENGTH_MEDIUM = 20;
/**
* Request a shorter abbreviated version of the name.
* For use with the 'abbrev' parameter of {@link #getDayOfWeekString} and {@link #getMonthString}.
* @more
* <p>e.g. "Su" or "Jan"
* <p>In most languages, the results returned for LENGTH_SHORT will be the same as
* the results returned for {@link #LENGTH_MEDIUM}.
*/
public static final int LENGTH_SHORT = 30;
/**
* 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_SHORTER = 40;
/**
* Request an even shorter abbreviated version of the name.
* For use with the 'abbrev' parameter of {@link #getDayOfWeekString} and {@link #getMonthString}.
* @more
* <p>e.g. "S", "T", "T" or "J"
* <p>In some languages, the results returned for LENGTH_SHORTEST will be the same as
* the results returned for {@link #LENGTH_SHORT}.
*/
public static final int LENGTH_SHORTEST = 50;
/**
* 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.
*/
public static String getDayOfWeekString(int dayOfWeek, int abbrev) {
int[] list;
switch (abbrev) {
case LENGTH_LONG: list = sDaysLong; break;
case LENGTH_MEDIUM: list = sDaysMedium; break;
case LENGTH_SHORT: list = sDaysShort; break;
case LENGTH_SHORTER: list = sDaysShort; break;
case LENGTH_SHORTEST: list = sDaysShortest; break;
default: list = sDaysMedium; break;
}
Resources r = Resources.getSystem();
return r.getString(list[dayOfWeek - Calendar.SUNDAY]);
}
/**
* 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".
*/
public static String getAMPMString(int ampm) {
Resources r = Resources.getSystem();
return r.getString(sAmPm[ampm - Calendar.AM]);
}
/**
* 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.
*/
public static String getMonthString(int month, int abbrev) {
// Note that here we use sMonthsMedium for MEDIUM, SHORT and SHORTER.
// This is a shortcut to not spam the translators with too many variations
// of the same string. If we find that in a language the distinction
// is necessary, we can can add more without changing this API.
int[] list;
switch (abbrev) {
case LENGTH_LONG: list = sMonthsLong; break;
case LENGTH_MEDIUM: list = sMonthsMedium; break;
case LENGTH_SHORT: list = sMonthsMedium; break;
case LENGTH_SHORTER: list = sMonthsMedium; break;
case LENGTH_SHORTEST: list = sMonthsShortest; break;
default: list = sMonthsMedium; break;
}
Resources r = Resources.getSystem();
return r.getString(list[month - Calendar.JANUARY]);
}
/**
* Return a localized string for the month of the year, for
* contexts where the month is not formatted together with
* a day of the month.
*
* @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.
* @hide Pending API council approval
*/
public static String getStandaloneMonthString(int month, int abbrev) {
// Note that here we use sMonthsMedium for MEDIUM, SHORT and SHORTER.
// This is a shortcut to not spam the translators with too many variations
// of the same string. If we find that in a language the distinction
// is necessary, we can can add more without changing this API.
int[] list;
switch (abbrev) {
case LENGTH_LONG: list = sMonthsStandaloneLong;
break;
case LENGTH_MEDIUM: list = sMonthsMedium; break;
case LENGTH_SHORT: list = sMonthsMedium; break;
case LENGTH_SHORTER: list = sMonthsMedium; break;
case LENGTH_SHORTEST: list = sMonthsShortest; break;
default: list = sMonthsMedium; break;
}
Resources r = Resources.getSystem();
return r.getString(list[month - Calendar.JANUARY]);
}
/**
* 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)
*/
public static CharSequence getRelativeTimeSpanString(long startTime) {
return getRelativeTimeSpanString(startTime, System.currentTimeMillis(), MINUTE_IN_MILLIS);
}
/**
* Returns a string describing 'time' as a time relative to 'now'.
* <p>
* 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
*/
public static CharSequence getRelativeTimeSpanString(long time, long now, long minResolution) {
int flags = FORMAT_SHOW_DATE | FORMAT_SHOW_YEAR | FORMAT_ABBREV_MONTH;
return getRelativeTimeSpanString(time, now, minResolution, flags);
}
/**
* Returns a string describing 'time' as a time relative to 'now'.
* <p>
* Time spans in the past are formatted like "42 minutes ago". Time spans in
* the future are formatted like "in 42 minutes".
* <p>
* 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}
*/
public static CharSequence getRelativeTimeSpanString(long time, long now, long minResolution,
int flags) {
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) {
count = getNumberOfDaysPassed(time, now);
if (past) {
if (abbrevRelative) {
resId = com.android.internal.R.plurals.abbrev_num_days_ago;
} else {
resId = com.android.internal.R.plurals.num_days_ago;
}
} else {
if (abbrevRelative) {
resId = com.android.internal.R.plurals.abbrev_in_num_days;
} else {
resId = com.android.internal.R.plurals.in_num_days;
}
}
} 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);
}
/**
* Returns the number of days passed between two dates.
*
* @param date1 first date
* @param date2 second date
* @return number of days passed between to dates.
*/
private synchronized static long getNumberOfDaysPassed(long date1, long date2) {
if (sThenTime == null) {
sThenTime = new Time();
}
sThenTime.set(date1);
int day1 = Time.getJulianDay(date1, sThenTime.gmtoff);
sThenTime.set(date2);
int day2 = Time.getJulianDay(date2, sThenTime.gmtoff);
return Math.abs(day2 - day1);
}
/**
* Return string describing the elapsed time since startTime formatted like
* "[relative time/date], [time]".
* <p>
* Example output strings for the US date format.
* <ul>
* <li>3 mins ago, 10:15 AM
* <li>yesterday, 12:20 PM
* <li>Dec 12, 4:12 AM
* <li>11/14/2007, 8:20 AM
* </ul>
*
* @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}.
*/
public static CharSequence getRelativeDateTimeString(Context c, long time, long minResolution,
long transitionResolution, int flags) {
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;
}
/**
* 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 to get the strings from
* @param day the relative day to describe in UTC milliseconds
* @param today the current time in UTC milliseconds
* @return a formatting string
*/
private static final String getRelativeDayString(Resources r, long day, long today) {
Time startTime = new Time();
startTime.set(day);
Time currentTime = new Time();
currentTime.set(today);
int startDay = Time.getJulianDay(day, startTime.gmtoff);
int currentDay = Time.getJulianDay(today, currentTime.gmtoff);
int days = Math.abs(currentDay - startDay);
boolean past = (today > day);
if (days == 1) {
if (past) {
return r.getString(com.android.internal.R.string.yesterday);
} else {
return r.getString(com.android.internal.R.string.tomorrow);
}
} else if (days == 0) {
return r.getString(com.android.internal.R.string.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);
}
private static void initFormatStrings() {
synchronized (sLock) {
Resources r = Resources.getSystem();
Configuration cfg = r.getConfiguration();
if (sLastConfig == null || !sLastConfig.equals(cfg)) {
sLastConfig = cfg;
sStatusTimeFormat = java.text.DateFormat.getTimeInstance(java.text.DateFormat.SHORT);
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);
}
}
}
/**
* Format a time so it appears like it would in the status bar clock.
* @deprecated use {@link #DateFormat.getTimeFormat(Context)} instead.
* @hide
*/
public static final CharSequence timeString(long millis) {
initFormatStrings();
return sStatusTimeFormat.format(millis);
}
/**
* 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.
*/
public static String formatElapsedTime(long elapsedSeconds) {
return formatElapsedTime(null, elapsedSeconds);
}
/**
* Formats an elapsed time in the form "MM:SS" or "H:MM:SS"
* for display on the call-in-progress screen.
*
* @param recycle {@link StringBuilder} to recycle, if possible
* @param elapsedSeconds the elapsed time in seconds.
*/
public static String formatElapsedTime(StringBuilder recycle, long elapsedSeconds) {
initFormatStrings();
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;
String result;
if (hours > 0) {
return formatElapsedTime(recycle, sElapsedFormatHMMSS, hours, minutes, seconds);
} else {
return formatElapsedTime(recycle, sElapsedFormatMMSS, minutes, seconds);
}
}
/**
* Fast formatting of h:mm:ss
*/
private static String formatElapsedTime(StringBuilder recycle, String format, long hours,
long minutes, long seconds) {
if (FAST_FORMAT_HMMSS.equals(format)) {
StringBuilder sb = recycle;
if (sb == null) {
sb = new StringBuilder(8);
} else {
sb.setLength(0);
}
sb.append(hours);
sb.append(TIME_SEPARATOR);
if (minutes < 10) {
sb.append(TIME_PADDING);
} else {
sb.append(toDigitChar(minutes / 10));
}
sb.append(toDigitChar(minutes % 10));
sb.append(TIME_SEPARATOR);
if (seconds < 10) {
sb.append(TIME_PADDING);
} else {
sb.append(toDigitChar(seconds / 10));
}
sb.append(toDigitChar(seconds % 10));
return sb.toString();
} else {
return String.format(format, hours, minutes, seconds);
}
}
/**
* Fast formatting of m:ss
*/
private static String formatElapsedTime(StringBuilder recycle, String format, long minutes,
long seconds) {
if (FAST_FORMAT_MMSS.equals(format)) {
StringBuilder sb = recycle;
if (sb == null) {
sb = new StringBuilder(8);
} else {
sb.setLength(0);
}
if (minutes < 10) {
sb.append(TIME_PADDING);
} else {
sb.append(toDigitChar(minutes / 10));
}
sb.append(toDigitChar(minutes % 10));
sb.append(TIME_SEPARATOR);
if (seconds < 10) {
sb.append(TIME_PADDING);
} else {
sb.append(toDigitChar(seconds / 10));
}
sb.append(toDigitChar(seconds % 10));
return sb.toString();
} else {
return String.format(format, minutes, seconds);
}
}
private static char toDigitChar(long digit) {
return (char) (digit + '0');
}
/**
* 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.
*
* <p>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.
*/
public static final CharSequence formatSameDayTime(long then, long now,
int dateStyle, int timeStyle) {
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);
}
/**
* @hide
* @deprecated use {@link android.text.format.Time}
*/
public static Calendar newCalendar(boolean zulu)
{
if (zulu)
return Calendar.getInstance(TimeZone.getTimeZone("GMT"));
return Calendar.getInstance();
}
/**
* @return true if the supplied when is today else false
*/
public static boolean isToday(long when) {
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);
}
/**
* @hide
* @deprecated use {@link android.text.format.Time}
* Return true if this date string is local time
*/
public static boolean isUTC(String s)
{
if (s.length() == 16 && s.charAt(15) == 'Z') {
return true;
}
if (s.length() == 9 && s.charAt(8) == 'Z') {
// XXX not sure if this case possible/valid
return true;
}
return false;
}
/**
* Return a string containing the date and time in RFC2445 format.
* Ensures that the time is written in UTC. The Calendar class doesn't
* really help out with this, so this is slower than it ought to be.
*
* @param cal the date and time to write
* @hide
* @deprecated use {@link android.text.format.Time}
*/
public static String writeDateTime(Calendar cal)
{
TimeZone tz = TimeZone.getTimeZone("GMT");
GregorianCalendar c = new GregorianCalendar(tz);
c.setTimeInMillis(cal.getTimeInMillis());
return writeDateTime(c, true);
}
/**
* Return a string containing the date and time in RFC2445 format.
*
* @param cal the date and time to write
* @param zulu If the calendar is in UTC, pass true, and a Z will
* be written at the end as per RFC2445. Otherwise, the time is
* considered in localtime.
* @hide
* @deprecated use {@link android.text.format.Time}
*/
public static String writeDateTime(Calendar cal, boolean zulu)
{
StringBuilder sb = new StringBuilder();
sb.ensureCapacity(16);
if (zulu) {
sb.setLength(16);
sb.setCharAt(15, 'Z');
} else {
sb.setLength(15);
}
return writeDateTime(cal, sb);
}
/**
* Return a string containing the date and time in RFC2445 format.
*
* @param cal the date and time to write
* @param sb a StringBuilder to use. It is assumed that setLength
* has already been called on sb to the appropriate length
* which is sb.setLength(zulu ? 16 : 15)
* @hide
* @deprecated use {@link android.text.format.Time}
*/
public static String writeDateTime(Calendar cal, StringBuilder sb)
{
int n;
n = cal.get(Calendar.YEAR);
sb.setCharAt(3, (char)('0'+n%10));
n /= 10;
sb.setCharAt(2, (char)('0'+n%10));
n /= 10;
sb.setCharAt(1, (char)('0'+n%10));
n /= 10;
sb.setCharAt(0, (char)('0'+n%10));
n = cal.get(Calendar.MONTH) + 1;
sb.setCharAt(5, (char)('0'+n%10));
n /= 10;
sb.setCharAt(4, (char)('0'+n%10));
n = cal.get(Calendar.DAY_OF_MONTH);
sb.setCharAt(7, (char)('0'+n%10));
n /= 10;
sb.setCharAt(6, (char)('0'+n%10));
sb.setCharAt(8, 'T');
n = cal.get(Calendar.HOUR_OF_DAY);
sb.setCharAt(10, (char)('0'+n%10));
n /= 10;
sb.setCharAt(9, (char)('0'+n%10));
n = cal.get(Calendar.MINUTE);
sb.setCharAt(12, (char)('0'+n%10));
n /= 10;
sb.setCharAt(11, (char)('0'+n%10));
n = cal.get(Calendar.SECOND);
sb.setCharAt(14, (char)('0'+n%10));
n /= 10;
sb.setCharAt(13, (char)('0'+n%10));
return sb.toString();
}
/**
* @hide
* @deprecated use {@link android.text.format.Time}
*/
public static void assign(Calendar lval, Calendar rval)
{
// there should be a faster way.
lval.clear();
lval.setTimeInMillis(rval.getTimeInMillis());
}
/**
* Formats a date or a time range according to the local conventions.
* <p>
* 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, long, long, int) formatDateRange}
* @return a string containing the formatted date/time range.
*/
public static String formatDateRange(Context context, long startMillis,
long endMillis, int flags) {
Formatter f = new Formatter(new StringBuilder(50), Locale.getDefault());
return formatDateRange(context, f, startMillis, endMillis, flags).toString();
}
/**
* Formats a date or a time range according to the local conventions.
*
* <p>
* 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):
* <ul>
* <li>10:15am
* <li>3:00pm - 4:00pm
* <li>3pm - 4pm
* <li>3PM - 4PM
* <li>08:00 - 17:00
* <li>Oct 9
* <li>Tue, Oct 9
* <li>October 9, 2007
* <li>Oct 9 - 10
* <li>Oct 9 - 10, 2007
* <li>Oct 28 - Nov 3, 2007
* <li>Dec 31, 2007 - Jan 1, 2008
* <li>Oct 9, 8:00am - Oct 10, 5:00pm
* <li>12/31/2007 - 01/01/2008
* </ul>
*
* <p>
* The flags argument is a bitmask of options from the following list:
*
* <ul>
* <li>FORMAT_SHOW_TIME
* <li>FORMAT_SHOW_WEEKDAY
* <li>FORMAT_SHOW_YEAR
* <li>FORMAT_NO_YEAR
* <li>FORMAT_SHOW_DATE
* <li>FORMAT_NO_MONTH_DAY
* <li>FORMAT_12HOUR
* <li>FORMAT_24HOUR
* <li>FORMAT_CAP_AMPM
* <li>FORMAT_NO_NOON
* <li>FORMAT_CAP_NOON
* <li>FORMAT_NO_MIDNIGHT
* <li>FORMAT_CAP_MIDNIGHT
* <li>FORMAT_UTC
* <li>FORMAT_ABBREV_TIME
* <li>FORMAT_ABBREV_WEEKDAY
* <li>FORMAT_ABBREV_MONTH
* <li>FORMAT_ABBREV_ALL
* <li>FORMAT_NUMERIC_DATE
* </ul>
*
* <p>
* 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.
*
* <p>
* If FORMAT_SHOW_WEEKDAY is set, then the weekday is shown.
*
* <p>
* If FORMAT_SHOW_YEAR is set, then the year is always shown.
* If FORMAT_NO_YEAR is set, then the year is not shown.
* If neither FORMAT_SHOW_YEAR nor FORMAT_NO_YEAR are 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. If both are set,
* FORMAT_SHOW_YEAR takes precedence.
*
* <p>
* 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.
*
* <p>
* 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".
*
* <p>
* 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.
*
* <p>
* If FORMAT_NO_NOON is set and 12-hour time is used, then "12pm" is
* shown instead of "noon".
*
* <p>
* 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.
*
* <p>
* If FORMAT_NO_MIDNIGHT is set and 12-hour time is used, then "12am" is
* shown instead of "midnight".
*
* <p>
* 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.
*
* <p>
* 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.
*
* <p>
* 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.
*
* <p>
* If FORMAT_UTC is set, then the UTC timezone is used for the start
* and end milliseconds.
*
* <p>
* 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".
*
* <p>
* If FORMAT_ABBREV_WEEKDAY is set, then the weekday (if shown) is
* abbreviated to a 3-letter string.
*
* <p>
* If FORMAT_ABBREV_MONTH is set, then the month (if shown) is abbreviated
* to a 3-letter string.
*
* <p>
* If FORMAT_ABBREV_ALL is set, then the weekday and the month (if shown)
* are abbreviated to 3-letter strings.
*
* <p>
* 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".
*
* @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
*
* @return the formatter with the formatted date/time range appended to the string buffer.
*/
public static Formatter formatDateRange(Context context, Formatter formatter, long startMillis,
long endMillis, int flags) {
Resources res = Resources.getSystem();
boolean showTime = (flags & FORMAT_SHOW_TIME) != 0;
boolean showWeekDay = (flags & FORMAT_SHOW_WEEKDAY) != 0;
boolean showYear = (flags & FORMAT_SHOW_YEAR) != 0;
boolean noYear = (flags & FORMAT_NO_YEAR) != 0;
boolean useUTC = (flags & FORMAT_UTC) != 0;
boolean abbrevWeekDay = (flags & (FORMAT_ABBREV_WEEKDAY | FORMAT_ABBREV_ALL)) != 0;
boolean abbrevMonth = (flags & (FORMAT_ABBREV_MONTH | FORMAT_ABBREV_ALL)) != 0;
boolean noMonthDay = (flags & FORMAT_NO_MONTH_DAY) != 0;
boolean numericDate = (flags & FORMAT_NUMERIC_DATE) != 0;
// If we're getting called with a single instant in time (from
// e.g. formatDateTime(), below), then we can skip a lot of
// computation below that'd otherwise be thrown out.
boolean isInstant = (startMillis == endMillis);
Time startDate = useUTC ? new Time(Time.TIMEZONE_UTC) : new Time();
startDate.set(startMillis);
Time endDate;
int dayDistance;
if (isInstant) {
endDate = startDate;
dayDistance = 0;
} else {
endDate = useUTC ? new Time(Time.TIMEZONE_UTC) : new Time();
endDate.set(endMillis);
int startJulianDay = Time.getJulianDay(startMillis, startDate.gmtoff);
int endJulianDay = Time.getJulianDay(endMillis, endDate.gmtoff);
dayDistance = endJulianDay - startJulianDay;
}
// If the end date ends at 12am at the beginning of a day,
// then modify it to make it look like it ends at midnight on
// the previous day. This will allow us to display "8pm - midnight",
// for example, instead of "Nov 10, 8pm - Nov 11, 12am". But we only do
// this if it is midnight of the same day as the start date because
// for multiple-day events, an end time of "midnight on Nov 11" is
// ambiguous and confusing (is that midnight the start of Nov 11, or
// the end of Nov 11?).
// If we are not showing the time then also adjust the end date
// for multiple-day events. This is to allow us to display, for
// example, "Nov 10 -11" for an event with a start date of Nov 10
// and an end date of Nov 12 at 00:00.
// If the start and end time are the same, then skip this and don't
// adjust the date.
if (!isInstant
&& (endDate.hour | endDate.minute | endDate.second) == 0
&& (!showTime || dayDistance <= 1)) {
endDate.monthDay -= 1;
endDate.normalize(true /* ignore isDst */);
}
int startDay = startDate.monthDay;
int startMonthNum = startDate.month;
int startYear = startDate.year;
int endDay = endDate.monthDay;
int endMonthNum = endDate.month;
int endYear = endDate.year;
String startWeekDayString = "";
String endWeekDayString = "";
if (showWeekDay) {
String weekDayFormat = "";
if (abbrevWeekDay) {
weekDayFormat = ABBREV_WEEKDAY_FORMAT;
} else {
weekDayFormat = WEEKDAY_FORMAT;
}
startWeekDayString = startDate.format(weekDayFormat);
endWeekDayString = isInstant ? startWeekDayString : endDate.format(weekDayFormat);
}
String startTimeString = "";
String endTimeString = "";
if (showTime) {
String startTimeFormat = "";
String endTimeFormat = "";
boolean force24Hour = (flags & FORMAT_24HOUR) != 0;
boolean force12Hour = (flags & FORMAT_12HOUR) != 0;
boolean use24Hour;
if (force24Hour) {
use24Hour = true;
} else if (force12Hour) {
use24Hour = false;
} else {
use24Hour = DateFormat.is24HourFormat(context);
}
if (use24Hour) {
startTimeFormat = endTimeFormat =
res.getString(com.android.internal.R.string.hour_minute_24);
} else {
boolean abbrevTime = (flags & (FORMAT_ABBREV_TIME | FORMAT_ABBREV_ALL)) != 0;
boolean capAMPM = (flags & FORMAT_CAP_AMPM) != 0;
boolean noNoon = (flags & FORMAT_NO_NOON) != 0;
boolean capNoon = (flags & FORMAT_CAP_NOON) != 0;
boolean noMidnight = (flags & FORMAT_NO_MIDNIGHT) != 0;
boolean capMidnight = (flags & FORMAT_CAP_MIDNIGHT) != 0;
boolean startOnTheHour = startDate.minute == 0 && startDate.second == 0;
boolean endOnTheHour = endDate.minute == 0 && endDate.second == 0;
if (abbrevTime && startOnTheHour) {
if (capAMPM) {
startTimeFormat = res.getString(com.android.internal.R.string.hour_cap_ampm);
} else {
startTimeFormat = res.getString(com.android.internal.R.string.hour_ampm);
}
} else {
if (capAMPM) {
startTimeFormat = res.getString(com.android.internal.R.string.hour_minute_cap_ampm);
} else {
startTimeFormat = res.getString(com.android.internal.R.string.hour_minute_ampm);
}
}
// Don't waste time on setting endTimeFormat when
// we're dealing with an instant, where we'll never
// need the end point. (It's the same as the start
// point)
if (!isInstant) {
if (abbrevTime && endOnTheHour) {
if (capAMPM) {
endTimeFormat = res.getString(com.android.internal.R.string.hour_cap_ampm);
} else {
endTimeFormat = res.getString(com.android.internal.R.string.hour_ampm);
}
} else {
if (capAMPM) {
endTimeFormat = res.getString(com.android.internal.R.string.hour_minute_cap_ampm);
} else {
endTimeFormat = res.getString(com.android.internal.R.string.hour_minute_ampm);
}
}
if (endDate.hour == 12 && endOnTheHour && !noNoon) {
if (capNoon) {
endTimeFormat = res.getString(com.android.internal.R.string.Noon);
} else {
endTimeFormat = res.getString(com.android.internal.R.string.noon);
}
} else if (endDate.hour == 0 && endOnTheHour && !noMidnight) {
if (capMidnight) {
endTimeFormat = res.getString(com.android.internal.R.string.Midnight);
} else {
endTimeFormat = res.getString(com.android.internal.R.string.midnight);
}
}
}
if (startDate.hour == 12 && startOnTheHour && !noNoon) {
if (capNoon) {
startTimeFormat = res.getString(com.android.internal.R.string.Noon);
} else {
startTimeFormat = res.getString(com.android.internal.R.string.noon);
}
// Don't show the start time starting at midnight. Show
// 12am instead.
}
}
startTimeString = startDate.format(startTimeFormat);
endTimeString = isInstant ? startTimeString : endDate.format(endTimeFormat);
}
// Show the year if the user specified FORMAT_SHOW_YEAR or if
// the starting and end years are different from each other
// or from the current year. But don't show the year if the
// user specified FORMAT_NO_YEAR.
if (showYear) {
// No code... just a comment for clarity. Keep showYear
// on, as they enabled it with FORMAT_SHOW_YEAR. This
// takes precedence over them setting FORMAT_NO_YEAR.
} else if (noYear) {
// They explicitly didn't want a year.
showYear = false;
} else if (startYear != endYear) {
showYear = true;
} else {
// Show the year if it's not equal to the current year.
Time currentTime = new Time();
currentTime.setToNow();
showYear = startYear != currentTime.year;
}
String defaultDateFormat, fullFormat, dateRange;
if (numericDate) {
defaultDateFormat = res.getString(com.android.internal.R.string.numeric_date);
} else if (showYear) {
if (abbrevMonth) {
if (noMonthDay) {
defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month_year);
} else {
defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month_day_year);
}
} else {
if (noMonthDay) {
defaultDateFormat = res.getString(com.android.internal.R.string.month_year);
} else {
defaultDateFormat = res.getString(com.android.internal.R.string.month_day_year);
}
}
} else {
if (abbrevMonth) {
if (noMonthDay) {
defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month);
} else {
defaultDateFormat = res.getString(com.android.internal.R.string.abbrev_month_day);
}
} else {
if (noMonthDay) {
defaultDateFormat = res.getString(com.android.internal.R.string.month);
} else {
defaultDateFormat = res.getString(com.android.internal.R.string.month_day);
}
}
}
if (showWeekDay) {
if (showTime) {
fullFormat = res.getString(com.android.internal.R.string.wday1_date1_time1_wday2_date2_time2);
} else {
fullFormat = res.getString(com.android.internal.R.string.wday1_date1_wday2_date2);
}
} else {
if (showTime) {
fullFormat = res.getString(com.android.internal.R.string.date1_time1_date2_time2);
} else {
fullFormat = res.getString(com.android.internal.R.string.date1_date2);
}
}
if (noMonthDay && startMonthNum == endMonthNum) {
// Example: "January, 2008"
return formatter.format("%s", startDate.format(defaultDateFormat));
}
if (startYear != endYear || noMonthDay) {
// Different year or we are not showing the month day number.
// Example: "December 31, 2007 - January 1, 2008"
// Or: "January - February, 2008"
String startDateString = startDate.format(defaultDateFormat);
String endDateString = endDate.format(defaultDateFormat);
// The values that are used in a fullFormat string are specified
// by position.
return formatter.format(fullFormat,
startWeekDayString, startDateString, startTimeString,
endWeekDayString, endDateString, endTimeString);
}
// Get the month, day, and year strings for the start and end dates
String monthFormat;
if (numericDate) {
monthFormat = NUMERIC_MONTH_FORMAT;
} else if (abbrevMonth) {
monthFormat =
res.getString(com.android.internal.R.string.short_format_month);
} else {
monthFormat = MONTH_FORMAT;
}
String startMonthString = startDate.format(monthFormat);
String startMonthDayString = startDate.format(MONTH_DAY_FORMAT);
String startYearString = startDate.format(YEAR_FORMAT);
String endMonthString = isInstant ? null : endDate.format(monthFormat);
String endMonthDayString = isInstant ? null : endDate.format(MONTH_DAY_FORMAT);
String endYearString = isInstant ? null : endDate.format(YEAR_FORMAT);
if (startMonthNum != endMonthNum) {
// Same year, different month.
// Example: "October 28 - November 3"
// or: "Wed, Oct 31 - Sat, Nov 3, 2007"
// or: "Oct 31, 8am - Sat, Nov 3, 2007, 5pm"
int index = 0;
if (showWeekDay) index = 1;
if (showYear) index += 2;
if (showTime) index += 4;
if (numericDate) index += 8;
int resId = sameYearTable[index];
fullFormat = res.getString(resId);
// The values that are used in a fullFormat string are specified
// by position.
return formatter.format(fullFormat,
startWeekDayString, startMonthString, startMonthDayString,
startYearString, startTimeString,
endWeekDayString, endMonthString, endMonthDayString,
endYearString, endTimeString);
}
if (startDay != endDay) {
// Same month, different day.
int index = 0;
if (showWeekDay) index = 1;
if (showYear) index += 2;
if (showTime) index += 4;
if (numericDate) index += 8;
int resId = sameMonthTable[index];
fullFormat = res.getString(resId);
// The values that are used in a fullFormat string are specified
// by position.
return formatter.format(fullFormat,
startWeekDayString, startMonthString, startMonthDayString,
startYearString, startTimeString,
endWeekDayString, endMonthString, endMonthDayString,
endYearString, endTimeString);
}
// Same start and end day
boolean showDate = (flags & FORMAT_SHOW_DATE) != 0;
// If nothing was specified, then show the date.
if (!showTime && !showDate && !showWeekDay) showDate = true;
// Compute the time string (example: "10:00 - 11:00 am")
String timeString = "";
if (showTime) {
// If the start and end time are the same, then just show the
// start time.
if (isInstant) {
// Same start and end time.
// Example: "10:15 AM"
timeString = startTimeString;
} else {
// Example: "10:00 - 11:00 am"
String timeFormat = res.getString(com.android.internal.R.string.time1_time2);
// Don't use the user supplied Formatter because the result will pollute the buffer.
timeString = String.format(timeFormat, startTimeString, endTimeString);
}
}
// Figure out which full format to use.
fullFormat = "";
String dateString = "";
if (showDate) {
dateString = startDate.format(defaultDateFormat);
if (showWeekDay) {
if (showTime) {
// Example: "10:00 - 11:00 am, Tue, Oct 9"
fullFormat = res.getString(com.android.internal.R.string.time_wday_date);
} else {
// Example: "Tue, Oct 9"
fullFormat = res.getString(com.android.internal.R.string.wday_date);
}
} else {
if (showTime) {
// Example: "10:00 - 11:00 am, Oct 9"
fullFormat = res.getString(com.android.internal.R.string.time_date);
} else {
// Example: "Oct 9"
return formatter.format("%s", dateString);
}
}
} else if (showWeekDay) {
if (showTime) {
// Example: "10:00 - 11:00 am, Tue"
fullFormat = res.getString(com.android.internal.R.string.time_wday);
} else {
// Example: "Tue"
return formatter.format("%s", startWeekDayString);
}
} else if (showTime) {
return formatter.format("%s", timeString);
}
// The values that are used in a fullFormat string are specified
// by position.
return formatter.format(fullFormat, timeString, startWeekDayString, dateString);
}
/**
* 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}.
* <p>
* 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):
* <ul>
* <li>10:15am
* <li>3:00pm
* <li>3pm
* <li>3PM
* <li>08:00
* <li>17:00
* <li>noon
* <li>Noon
* <li>midnight
* <li>Midnight
* <li>Oct 31
* <li>Oct 31, 2007
* <li>October 31, 2007
* <li>10am, Oct 31
* <li>17:00, Oct 31
* <li>Wed
* <li>Wednesday
* <li>10am, Wed, Oct 31
* <li>Wed, Oct 31
* <li>Wednesday, Oct 31
* <li>Wed, Oct 31, 2007
* <li>Wed, October 31
* <li>10/31/2007
* </ul>
*
* @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.
*/
public static String formatDateTime(Context context, long millis, int flags) {
return formatDateRange(context, millis, millis, flags);
}
/**
* @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:
* <ul>
* <li>"millis=0:10 today" will be displayed as "0:10"
* <li>"millis=11:30pm the day before" will be displayed as "Mar 30"
* </ul>
* 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").
*/
public static CharSequence getRelativeTimeSpanString(Context c, long millis,
boolean withPreposition) {
String result;
long now = System.currentTimeMillis();
long span = 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;
}
/**
* 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)
*/
public static CharSequence getRelativeTimeSpanString(Context c, long millis) {
return getRelativeTimeSpanString(c, millis, false /* no preposition */);
}
private static Time sNowTime;
private static Time sThenTime;
}
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