Java Code Examples for android.icu.util.Calendar#before()

@Override
public void setMinDate(long minDate) {
    mTempDate.setTimeInMillis(minDate);
    if (isSameDate(mTempDate, mMinDate)) {
        return;
    }
    mMinDate.setTimeInMillis(minDate);
    // make sure the current date is not earlier than
    // the new min date since the latter is used for
    // calculating the indices in the adapter thus
    // avoiding out of bounds error
    Calendar date = mAdapter.mSelectedDate;
    if (date.before(mMinDate)) {
        mAdapter.setSelectedDay(mMinDate);
    }
    // reinitialize the adapter since its range depends on min date
    mAdapter.init();
    if (date.before(mMinDate)) {
        setDate(mTempDate.getTimeInMillis());
    } else {
        // we go to the current date to force the ListView to query its
        // adapter for the shown views since we have changed the adapter
        // range and the base from which the later calculates item indices
        // note that calling setDate will not work since the date is the same
        goTo(date, false, true, false);
    }
}
 

/**
 * @return Returns the number of weeks between the current <code>date</code>
 *         and the <code>mMinDate</code>.
 */
private int getWeeksSinceMinDate(Calendar date) {
    if (date.before(mMinDate)) {
        throw new IllegalArgumentException("fromDate: " + mMinDate.getTime()
                + " does not precede toDate: " + date.getTime());
    }
    long endTimeMillis = date.getTimeInMillis()
            + date.getTimeZone().getOffset(date.getTimeInMillis());
    long startTimeMillis = mMinDate.getTimeInMillis()
            + mMinDate.getTimeZone().getOffset(mMinDate.getTimeInMillis());
    long dayOffsetMillis = (mMinDate.get(Calendar.DAY_OF_WEEK) - mFirstDayOfWeek)
            * MILLIS_IN_DAY;
    return (int) ((endTimeMillis - startTimeMillis + dayOffsetMillis) / MILLIS_IN_WEEK);
}
 

/**
 * This moves to the specified time in the view. If the time is not already
 * in range it will move the list so that the first of the month containing
 * the time is at the top of the view. If the new time is already in view
 * the list will not be scrolled unless forceScroll is true. This time may
 * optionally be highlighted as selected as well.
 *
 * @param date The time to move to.
 * @param animate Whether to scroll to the given time or just redraw at the
 *            new location.
 * @param setSelected Whether to set the given time as selected.
 * @param forceScroll Whether to recenter even if the time is already
 *            visible.
 *
 * @throws IllegalArgumentException if the provided date is before the
 *         range start or after the range end.
 */
private void goTo(Calendar date, boolean animate, boolean setSelected,
        boolean forceScroll) {
    if (date.before(mMinDate) || date.after(mMaxDate)) {
        throw new IllegalArgumentException("timeInMillis must be between the values of "
                + "getMinDate() and getMaxDate()");
    }
    // Find the first and last entirely visible weeks
    int firstFullyVisiblePosition = mListView.getFirstVisiblePosition();
    View firstChild = mListView.getChildAt(0);
    if (firstChild != null && firstChild.getTop() < 0) {
        firstFullyVisiblePosition++;
    }
    int lastFullyVisiblePosition = firstFullyVisiblePosition + mShownWeekCount - 1;
    if (firstChild != null && firstChild.getTop() > mBottomBuffer) {
        lastFullyVisiblePosition--;
    }
    if (setSelected) {
        mAdapter.setSelectedDay(date);
    }
    // Get the week we're going to
    int position = getWeeksSinceMinDate(date);

    // Check if the selected day is now outside of our visible range
    // and if so scroll to the month that contains it
    if (position < firstFullyVisiblePosition || position > lastFullyVisiblePosition
            || forceScroll) {
        mFirstDayOfMonth.setTimeInMillis(date.getTimeInMillis());
        mFirstDayOfMonth.set(Calendar.DAY_OF_MONTH, 1);

        setMonthDisplayed(mFirstDayOfMonth);

        // the earliest time we can scroll to is the min date
        if (mFirstDayOfMonth.before(mMinDate)) {
            position = 0;
        } else {
            position = getWeeksSinceMinDate(mFirstDayOfMonth);
        }

        mPreviousScrollState = AbsListView.OnScrollListener.SCROLL_STATE_FLING;
        if (animate) {
            mListView.smoothScrollToPositionFromTop(position, mListScrollTopOffset,
                    GOTO_SCROLL_DURATION);
        } else {
            mListView.setSelectionFromTop(position, mListScrollTopOffset);
            // Perform any after scroll operations that are needed
            onScrollStateChanged(mListView, AbsListView.OnScrollListener.SCROLL_STATE_IDLE);
        }
    } else if (setSelected) {
        // Otherwise just set the selection
        setMonthDisplayed(date);
    }
}