Java DateUtils.FORMAT_SHOW_WEEKDAY属性代码示例

/**
 * Announce the currently-selected date when launched.
 */
@Override
public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
    if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {
        // Clear the event's current text so that only the current date will
        // be spoken.
        event.getText().clear();
        int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR
                | DateUtils.FORMAT_SHOW_WEEKDAY;

        String dateString = DateUtils.formatDateTime(getContext(),
                mDateMillis, flags);
        event.getText().add(dateString);
        return true;
    }
    return super.dispatchPopulateAccessibilityEvent(event);
}
 

/**
 * Announce the currently-selected date when launched.
 */
@Override
public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
    if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {
        // Clear the event's current text so that only the current date will be spoken.
        event.getText().clear();
        int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR |
                DateUtils.FORMAT_SHOW_WEEKDAY;

        String dateString = DateUtils.formatDateTime(getContext(), mDateMillis, flags);
        event.getText().add(dateString);
        return true;
    }
    return super.dispatchPopulateAccessibilityEvent(event);
}
 

public String formatDate(OrgDateTime time) {
    long timestamp = time.getCalendar().getTimeInMillis();

    int flags = DateUtils.FORMAT_SHOW_DATE |
                DateUtils.FORMAT_ABBREV_MONTH |
                DateUtils.FORMAT_SHOW_WEEKDAY |
                DateUtils.FORMAT_ABBREV_WEEKDAY;

    return format(timestamp, timestamp, flags);
}
 

/**
 * Helper method to convert the database representation of the date into something to display
 * to users. As classy and polished a user experience as "1474061664" is, we can do better.
 * <p/>
 * The day string for forecast uses the following logic:
 * For today: "Today, June 8"
 * For tomorrow:  "Tomorrow
 * For the next 5 days: "Wednesday" (just the day name)
 * For all days after that: "Mon, Jun 8" (Mon, 8 Jun in UK, for example)
 *
 * @param context               Context to use for resource localization
 * @param normalizedUtcMidnight The date in milliseconds (UTC midnight)
 * @param showFullDate          Used to show a fuller-version of the date, which always
 *                              contains either the day of the week, today, or tomorrow, in
 *                              addition to the date.
 *
 * @return A user-friendly representation of the date such as "Today, June 8", "Tomorrow",
 * or "Friday"
 */
public static String getFriendlyDateString(Context context, long normalizedUtcMidnight, boolean showFullDate) {

    /*
     * NOTE: localDate should be localDateMidnightMillis and should be straight from the
     * database
     *
     * Since we normalized the date when we inserted it into the database, we need to take
     * that normalized date and produce a date (in UTC time) that represents the local time
     * zone at midnight.
     */
    long localDate = getLocalMidnightFromNormalizedUtcDate(normalizedUtcMidnight);

    /*
     * In order to determine which day of the week we are creating a date string for, we need
     * to compare the number of days that have passed since the epoch (January 1, 1970 at
     * 00:00 GMT)
     */
    long daysFromEpochToProvidedDate = elapsedDaysSinceEpoch(localDate);

    /*
     * As a basis for comparison, we use the number of days that have passed from the epoch
     * until today.
     */
    long daysFromEpochToToday = elapsedDaysSinceEpoch(System.currentTimeMillis());

    if (daysFromEpochToProvidedDate == daysFromEpochToToday || showFullDate) {
        /*
         * If the date we're building the String for is today's date, the format
         * is "Today, June 24"
         */
        String dayName = getDayName(context, localDate);
        String readableDate = getReadableDateString(context, localDate);
        if (daysFromEpochToProvidedDate - daysFromEpochToToday < 2) {
            /*
             * Since there is no localized format that returns "Today" or "Tomorrow" in the API
             * levels we have to support, we take the name of the day (from SimpleDateFormat)
             * and use it to replace the date from DateUtils. This isn't guaranteed to work,
             * but our testing so far has been conclusively positive.
             *
             * For information on a simpler API to use (on API > 18), please check out the
             * documentation on DateFormat#getBestDateTimePattern(Locale, String)
             * https://developer.android.com/reference/android/text/format/DateFormat.html#getBestDateTimePattern
             */
            String localizedDayName = new SimpleDateFormat("EEEE").format(localDate);
            return readableDate.replace(localizedDayName, dayName);
        } else {
            return readableDate;
        }
    } else if (daysFromEpochToProvidedDate < daysFromEpochToToday + 7) {
        /* If the input date is less than a week in the future, just return the day name. */
        return getDayName(context, localDate);
    } else {
        int flags = DateUtils.FORMAT_SHOW_DATE
                | DateUtils.FORMAT_NO_YEAR
                | DateUtils.FORMAT_ABBREV_ALL
                | DateUtils.FORMAT_SHOW_WEEKDAY;

        return DateUtils.formatDateTime(context, localDate, flags);
    }
}
 

/**
 * Helper method to convert the database representation of the date into something to display
 * to users.  As classy and polished a user experience as "20140102" is, we can do better.
 * <p/>
 * The day string for forecast uses the following logic:
 * For today: "Today, June 8"
 * For tomorrow:  "Tomorrow"
 * For the next 5 days: "Wednesday" (just the day name)
 * For all days after that: "Mon, Jun 8" (Mon, 8 Jun in UK, for example)
 *
 * @param context      Context to use for resource localization
 * @param dateInMillis The date in milliseconds (UTC)
 * @param showFullDate Used to show a fuller-version of the date, which always contains either
 *                     the day of the week, today, or tomorrow, in addition to the date.
 *
 * @return A user-friendly representation of the date such as "Today, June 8", "Tomorrow",
 * or "Friday"
 */
public static String getFriendlyDateString(Context context, long dateInMillis, boolean showFullDate) {

    long localDate = getLocalDateFromUTC(dateInMillis);
    long dayNumber = getDayNumber(localDate);
    long currentDayNumber = getDayNumber(System.currentTimeMillis());

    if (dayNumber == currentDayNumber || showFullDate) {
        /*
         * If the date we're building the String for is today's date, the format
         * is "Today, June 24"
         */
        String dayName = getDayName(context, localDate);
        String readableDate = getReadableDateString(context, localDate);
        if (dayNumber - currentDayNumber < 2) {
            /*
             * Since there is no localized format that returns "Today" or "Tomorrow" in the API
             * levels we have to support, we take the name of the day (from SimpleDateFormat)
             * and use it to replace the date from DateUtils. This isn't guaranteed to work,
             * but our testing so far has been conclusively positive.
             *
             * For information on a simpler API to use (on API > 18), please check out the
             * documentation on DateFormat#getBestDateTimePattern(Locale, String)
             * https://developer.android.com/reference/android/text/format/DateFormat.html#getBestDateTimePattern
             */
            String localizedDayName = new SimpleDateFormat("EEEE").format(localDate);
            return readableDate.replace(localizedDayName, dayName);
        } else {
            return readableDate;
        }
    } else if (dayNumber < currentDayNumber + 7) {
        /* If the input date is less than a week in the future, just return the day name. */
        return getDayName(context, localDate);
    } else {
        int flags = DateUtils.FORMAT_SHOW_DATE
                | DateUtils.FORMAT_NO_YEAR
                | DateUtils.FORMAT_ABBREV_ALL
                | DateUtils.FORMAT_SHOW_WEEKDAY;

        return DateUtils.formatDateTime(context, localDate, flags);
    }
}
 

/**
 * Returns a date string in the format specified, which shows an abbreviated date without a
 * year.
 *
 * @param context      Used by DateUtils to format the date in the current locale
 * @param timeInMillis Time in milliseconds since the epoch (local time)
 *
 * @return The formatted date string
 */
private static String getReadableDateString(Context context, long timeInMillis) {
    int flags = DateUtils.FORMAT_SHOW_DATE
            | DateUtils.FORMAT_NO_YEAR
            | DateUtils.FORMAT_SHOW_WEEKDAY;

    return DateUtils.formatDateTime(context, timeInMillis, flags);
}
 

/**
 * Returns a date string in the format specified, which shows a date, without a year,
 * abbreviated, showing the full weekday.
 *
 * @param context      Used by DateUtils to formate the date in the current locale
 * @param timeInMillis Time in milliseconds since the epoch (local time)
 *
 * @return The formatted date string
 */
private static String getReadableDateString(Context context, long timeInMillis) {
    int flags = DateUtils.FORMAT_SHOW_DATE
            | DateUtils.FORMAT_NO_YEAR
            | DateUtils.FORMAT_SHOW_WEEKDAY;

    return DateUtils.formatDateTime(context, timeInMillis, flags);
}