IT. Expert System.

Android Reference

Time


android.text.format

Class Time



  • public class Time
    extends Object
    An alternative to the Calendar and GregorianCalendar classes. An instance of the Time class represents a moment in time, specified with second precision. It is modelled after struct tm, and in fact, uses struct tm to implement most of the functionality.
    • Constructor Summary

      Constructors
      Constructor and Description
      Time()
      Construct a Time object in the default timezone.
      Time(String timezone)
      Construct a Time object in the timezone named by the string argument "timezone".
      Time(Time other)
      A copy constructor.
    • Method Summary

      Methods
      Modifier and Type Method and Description
      boolean after(Time that)
      Returns true if the time represented by this Time object occurs after the given time.
      boolean before(Time that)
      Returns true if the time represented by this Time object occurs before the given time.
      void clear(String timezone)
      Clears all values, setting the timezone to the given timezone.
      static int compare(Time a, Time b)
      Compare two Time objects and return a negative number if a is less than b, a positive number if a is greater than b, or 0 if they are equal.
      String format(String format)
      Print the current value given the format string provided.
      String format2445()
      Format according to RFC 2445 DATETIME type.
      String format3339(boolean allDay)
      Return a string in the RFC 3339 format.
      int getActualMaximum(int field)
      Return the maximum possible value for the given field given the value of the other fields.
      static String getCurrentTimezone()
      Returns the timezone string that is currently set for the device.
      static int getJulianDay(long millis, long gmtoff)
      Computes the Julian day number, given the UTC milliseconds and the offset (in seconds) from UTC.
      static int getJulianMondayFromWeeksSinceEpoch(int week)
      Takes a number of weeks since the epoch and calculates the Julian day of the Monday for that week.
      int getWeekNumber()
      Computes the week number according to ISO 8601.
      static int getWeeksSinceEpochFromJulianDay(int julianDay, int firstDayOfWeek)
      Returns the week since EPOCH_JULIAN_DAY (Jan 1, 1970) adjusted for first day of week.
      static boolean isEpoch(Time time)
      Returns true if the day of the given time is the epoch on the Julian Calendar (January 1, 1970 on the Gregorian calendar).
      long normalize(boolean ignoreDst)
      Ensures the values in each field are in range.
      boolean parse(String s)
      Parses a date-time string in either the RFC 2445 format or an abbreviated format that does not include the "time" field.
      boolean parse3339(String s)
      Parse a time in RFC 3339 format.
      void set(int monthDay, int month, int year)
      Sets the date from the given fields.
      void set(int second, int minute, int hour, int monthDay, int month, int year)
      Sets the fields.
      void set(long millis)
      Sets the fields in this Time object given the UTC milliseconds.
      void set(Time that)
      Copy the value of that to this Time object.
      long setJulianDay(int julianDay)
      Sets the time from the given Julian day number, which must be based on the same timezone that is set in this Time object.
      void setToNow()
      Sets the time of the given Time object to the current time.
      void switchTimezone(String timezone)
      Convert this time object so the time represented remains the same, but is instead located in a different timezone.
      long toMillis(boolean ignoreDst)
      Converts this time to milliseconds.
      String toString()
      Return the current time in YYYYMMDDTHHMMSS format
    • Field Detail

      • EPOCH_JULIAN_DAY

        public static final int EPOCH_JULIAN_DAY
        The Julian day of the epoch, that is, January 1, 1970 on the Gregorian calendar.
        See Also:
        Constant Field Values
      • MONDAY_BEFORE_JULIAN_EPOCH

        public static final int MONDAY_BEFORE_JULIAN_EPOCH
        The Julian day of the Monday in the week of the epoch, December 29, 1969 on the Gregorian calendar.
        See Also:
        Constant Field Values
      • allDay

        public boolean allDay
        True if this is an allDay event. The hour, minute, second fields are all zero, and the date is displayed the same in all time zones.
      • second

        public int second
        Seconds [0-61] (2 leap seconds allowed)
      • minute

        public int minute
        Minute [0-59]
      • hour

        public int hour
        Hour of day [0-23]
      • monthDay

        public int monthDay
        Day of month [1-31]
      • month

        public int month
        Month [0-11]
      • year

        public int year
        Year. For example, 1970.
      • weekDay

        public int weekDay
        Day of week [0-6]
      • yearDay

        public int yearDay
        Day of year [0-365]
      • isDst

        public int isDst
        This time is in daylight savings time. One of:
        • positive - in dst
        • 0 - not in dst
        • negative - unknown
      • gmtoff

        public long gmtoff
        Offset from UTC (in seconds).
      • timezone

        public String timezone
        The timezone for this Time. Should not be null.
    • Constructor Detail

      • Time

        public Time(String timezone)
        Construct a Time object in the timezone named by the string argument "timezone". The time is initialized to Jan 1, 1970.
        Parameters:
        timezone - string containing the timezone to use.
        See Also:
        TimeZone
      • Time

        public Time()
        Construct a Time object in the default timezone. The time is initialized to Jan 1, 1970.
      • Time

        public Time(Time other)
        A copy constructor. Construct a Time object by copying the given Time object. No normalization occurs.
        Parameters:
        other -
    • Method Detail

      • normalize

        public long normalize(boolean ignoreDst)
        Ensures the values in each field are in range. For example if the current value of this calendar is March 32, normalize() will convert it to April 1. It also fills in weekDay, yearDay, isDst and gmtoff.

        If "ignoreDst" is true, then this method sets the "isDst" field to -1 (the "unknown" value) before normalizing. It then computes the correct value for "isDst".

        See toMillis(boolean) for more information about when to use true or false for "ignoreDst".

        Returns:
        the UTC milliseconds since the epoch
      • switchTimezone

        public void switchTimezone(String timezone)
        Convert this time object so the time represented remains the same, but is instead located in a different timezone. This method automatically calls normalize() in some cases
      • getActualMaximum

        public int getActualMaximum(int field)
        Return the maximum possible value for the given field given the value of the other fields. Requires that it be normalized for MONTH_DAY and YEAR_DAY.
        Parameters:
        field - one of the constants for HOUR, MINUTE, SECOND, etc.
        Returns:
        the maximum value for the field.
      • clear

        public void clear(String timezone)
        Clears all values, setting the timezone to the given timezone. Sets isDst to a negative value to mean "unknown".
        Parameters:
        timezone - the timezone to use.
      • compare

        public static int compare(Time a,
                  Time b)
        Compare two Time objects and return a negative number if a is less than b, a positive number if a is greater than b, or 0 if they are equal.
        Parameters:
        a - first Time instance to compare
        b - second Time instance to compare
        Returns:
        a negative result if a is earlier, a positive result if a is earlier, or 0 if they are equal.
        Throws:
        NullPointerException - if either argument is null
        IllegalArgumentException - if allDay is true but hour, minute, and second are not 0.
      • format

        public String format(String format)
        Print the current value given the format string provided. See man strftime for what means what. The final string must be less than 256 characters.
        Parameters:
        format - a string containing the desired format.
        Returns:
        a String containing the current time expressed in the current locale.
      • toString

        public String toString()
        Return the current time in YYYYMMDDTHHMMSS format
        Overrides:
        toString in class Object
        Returns:
        a printable representation of this object.
      • parse

        public boolean parse(String s)
        Parses a date-time string in either the RFC 2445 format or an abbreviated format that does not include the "time" field. For example, all of the following strings are valid:
        • "20081013T160000Z"
        • "20081013T160000"
        • "20081013"
        Returns whether or not the time is in UTC (ends with Z). If the string ends with "Z" then the timezone is set to UTC. If the date-time string included only a date and no time field, then the allDay field of this Time class is set to true and the hour, minute, and second fields are set to zero; otherwise (a time field was included in the date-time string) allDay is set to false. The fields weekDay, yearDay, and gmtoff are always set to zero, and the field isDst is set to -1 (unknown). To set those fields, call normalize(boolean) after parsing. To parse a date-time string and convert it to UTC milliseconds, do something like this:
           Time time = new Time();
           String date = "20081013T160000Z";
           time.parse(date);
           long millis = time.normalize(false);
         
        Parameters:
        s - the string to parse
        Returns:
        true if the resulting time value is in UTC time
        Throws:
        TimeFormatException - if s cannot be parsed.
      • parse3339

        public boolean parse3339(String s)
        Parse a time in RFC 3339 format. This method also parses simple dates (that is, strings that contain no time or time offset). For example, all of the following strings are valid:
        • "2008-10-13T16:00:00.000Z"
        • "2008-10-13T16:00:00.000+07:00"
        • "2008-10-13T16:00:00.000-07:00"
        • "2008-10-13"

        If the string contains a time and time offset, then the time offset will be used to convert the time value to UTC.

        If the given string contains just a date (with no time field), then the allDay field is set to true and the hour, minute, and second fields are set to zero.

        Returns true if the resulting time value is in UTC time.

        Parameters:
        s - the string to parse
        Returns:
        true if the resulting time value is in UTC time
        Throws:
        TimeFormatException - if s cannot be parsed.
      • getCurrentTimezone

        public static String getCurrentTimezone()
        Returns the timezone string that is currently set for the device.
      • setToNow

        public void setToNow()
        Sets the time of the given Time object to the current time.
      • toMillis

        public long toMillis(boolean ignoreDst)
        Converts this time to milliseconds. Suitable for interacting with the standard java libraries. The time is in UTC milliseconds since the epoch. This does an implicit normalization to compute the milliseconds but does not change any of the fields in this Time object. If you want to normalize the fields in this Time object and also get the milliseconds then use normalize(boolean).

        If "ignoreDst" is false, then this method uses the current setting of the "isDst" field and will adjust the returned time if the "isDst" field is wrong for the given time. See the sample code below for an example of this.

        If "ignoreDst" is true, then this method ignores the current setting of the "isDst" field in this Time object and will instead figure out the correct value of "isDst" (as best it can) from the fields in this Time object. The only case where this method cannot figure out the correct value of the "isDst" field is when the time is inherently ambiguous because it falls in the hour that is repeated when switching from Daylight-Saving Time to Standard Time.

        Here is an example where toMillis(true) adjusts the time, assuming that DST changes at 2am on Sunday, Nov 4, 2007.

         Time time = new Time();
         time.set(4, 10, 2007);  // set the date to Nov 4, 2007, 12am
         time.normalize();       // this sets isDst = 1
         time.monthDay += 1;     // changes the date to Nov 5, 2007, 12am
         millis = time.toMillis(false);   // millis is Nov 4, 2007, 11pm
         millis = time.toMillis(true);    // millis is Nov 5, 2007, 12am
         

        To avoid this problem, use toMillis(true) after adding or subtracting days or explicitly setting the "monthDay" field. On the other hand, if you are adding or subtracting hours or minutes, then you should use toMillis(false).

        You should also use toMillis(false) if you want to read back the same milliseconds that you set with set(long) or set(Time) or after parsing a date string.

      • set

        public void set(long millis)
        Sets the fields in this Time object given the UTC milliseconds. After this method returns, all the fields are normalized. This also sets the "isDst" field to the correct value.
        Parameters:
        millis - the time in UTC milliseconds since the epoch.
      • format2445

        public String format2445()
        Format according to RFC 2445 DATETIME type.

        The same as format("%Y%m%dT%H%M%S").

      • set

        public void set(Time that)
        Copy the value of that to this Time object. No normalization happens.
      • set

        public void set(int second,
               int minute,
               int hour,
               int monthDay,
               int month,
               int year)
        Sets the fields. Sets weekDay, yearDay and gmtoff to 0, and isDst to -1. Call normalize(boolean) if you need those.
      • set

        public void set(int monthDay,
               int month,
               int year)
        Sets the date from the given fields. Also sets allDay to true. Sets weekDay, yearDay and gmtoff to 0, and isDst to -1. Call normalize(boolean) if you need those.
        Parameters:
        monthDay - the day of the month (in the range [1,31])
        month - the zero-based month number (in the range [0,11])
        year - the year
      • before

        public boolean before(Time that)
        Returns true if the time represented by this Time object occurs before the given time.
        Parameters:
        that - a given Time object to compare against
        Returns:
        true if this time is less than the given time
      • after

        public boolean after(Time that)
        Returns true if the time represented by this Time object occurs after the given time.
        Parameters:
        that - a given Time object to compare against
        Returns:
        true if this time is greater than the given time
      • getWeekNumber

        public int getWeekNumber()
        Computes the week number according to ISO 8601. The current Time object must already be normalized because this method uses the yearDay and weekDay fields.

        In IS0 8601, weeks start on Monday. The first week of the year (week 1) is defined by ISO 8601 as the first week with four or more of its days in the starting year. Or equivalently, the week containing January 4. Or equivalently, the week with the year's first Thursday in it.

        The week number can be calculated by counting Thursdays. Week N contains the Nth Thursday of the year.

        Returns:
        the ISO week number.
      • format3339

        public String format3339(boolean allDay)
        Return a string in the RFC 3339 format.

        If allDay is true, expresses the time as Y-M-D

        Otherwise, if the timezone is UTC, expresses the time as Y-M-D-T-H-M-S UTC

        Otherwise the time is expressed the time as Y-M-D-T-H-M-S +- GMT

        Parameters:
        allDay -
        Returns:
        string in the RFC 3339 format.
      • isEpoch

        public static boolean isEpoch(Time time)
        Returns true if the day of the given time is the epoch on the Julian Calendar (January 1, 1970 on the Gregorian calendar).
        Parameters:
        time - the time to test
        Returns:
        true if epoch.
      • getJulianDay

        public static int getJulianDay(long millis,
                       long gmtoff)
        Computes the Julian day number, given the UTC milliseconds and the offset (in seconds) from UTC. The Julian day for a given date will be the same for every timezone. For example, the Julian day for July 1, 2008 is 2454649. This is the same value no matter what timezone is being used. The Julian day is useful for testing if two events occur on the same day and for determining the relative time of an event from the present ("yesterday", "3 days ago", etc.).

        Use toMillis(boolean) to get the milliseconds.

        Parameters:
        millis - the time in UTC milliseconds
        gmtoff - the offset from UTC in seconds
        Returns:
        the Julian day
      • setJulianDay

        public long setJulianDay(int julianDay)

        Sets the time from the given Julian day number, which must be based on the same timezone that is set in this Time object. The "gmtoff" field need not be initialized because the given Julian day may have a different GMT offset than whatever is currently stored in this Time object anyway. After this method returns all the fields will be normalized and the time will be set to 12am at the beginning of the given Julian day.

        The only exception to this is if 12am does not exist for that day because of daylight saving time. For example, Cairo, Eqypt moves time ahead one hour at 12am on April 25, 2008 and there are a few other places that also change daylight saving time at 12am. In those cases, the time will be set to 1am.

        Parameters:
        julianDay - the Julian day in the timezone for this Time object
        Returns:
        the UTC milliseconds for the beginning of the Julian day
      • getWeeksSinceEpochFromJulianDay

        public static int getWeeksSinceEpochFromJulianDay(int julianDay,
                                          int firstDayOfWeek)
        Returns the week since EPOCH_JULIAN_DAY (Jan 1, 1970) adjusted for first day of week. This takes a julian day and the week start day and calculates which week since EPOCH_JULIAN_DAY that day occurs in, starting at 0. *Do not* use this to compute the ISO week number for the year.
        Parameters:
        julianDay - The julian day to calculate the week number for
        firstDayOfWeek - Which week day is the first day of the week, see SUNDAY
        Returns:
        Weeks since the epoch
      • getJulianMondayFromWeeksSinceEpoch

        public static int getJulianMondayFromWeeksSinceEpoch(int week)
        Takes a number of weeks since the epoch and calculates the Julian day of the Monday for that week. This assumes that the week containing the EPOCH_JULIAN_DAY is considered week 0. It returns the Julian day for the Monday week weeks after the Monday of the week containing the epoch.
        Parameters:
        week - Number of weeks since the epoch
        Returns:
        The julian day for the Monday of the given week since the epoch


Content

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary

License.
All information of this service is derived from the free sources and is provided solely in the form of quotations. This service provides information and interfaces solely for the familiarization (not ownership) and under the "as is" condition.
Copyright 2016 © ELTASK.COM. All rights reserved.
Site is optimized for mobile devices.
Downloads: 691 / . Delta: 0.04844 с