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Utils.javaAPI DocAndroid 5.1 API5170Thu Mar 12 22:22:50 GMT 2015com.android.datetimepicker

Utils

public class Utils extends Object
Utility helper functions for time and date pickers.

Fields Summary
public static final int
MONDAY_BEFORE_JULIAN_EPOCH
public static final int
PULSE_ANIMATOR_DURATION
public static final int
SELECTED_ALPHA
public static final int
SELECTED_ALPHA_THEME_DARK
public static final int
FULL_ALPHA
static final String
SHARED_PREFS_NAME
Constructors Summary
Methods Summary
public static intgetDaysInMonth(int month, int year)

        switch (month) {
            case Calendar.JANUARY:
            case Calendar.MARCH:
            case Calendar.MAY:
            case Calendar.JULY:
            case Calendar.AUGUST:
            case Calendar.OCTOBER:
            case Calendar.DECEMBER:
                return 31;
            case Calendar.APRIL:
            case Calendar.JUNE:
            case Calendar.SEPTEMBER:
            case Calendar.NOVEMBER:
                return 30;
            case Calendar.FEBRUARY:
                return (year % 4 == 0) ? 29 : 28;
            default:
                throw new IllegalArgumentException("Invalid Month");
        }
public static intgetJulianMondayFromWeeksSinceEpoch(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 {@link Time#EPOCH_JULIAN_DAY} is considered week 0. It returns the Julian day for the Monday {@code week} weeks after the Monday of the week containing the epoch.

param
week Number of weeks since the epoch
return
The julian day for the Monday of the given week since the epoch

        return MONDAY_BEFORE_JULIAN_EPOCH + week * 7;
public static android.animation.ObjectAnimatorgetPulseAnimator(android.view.View labelToAnimate, float decreaseRatio, float increaseRatio)
Render an animator to pulsate a view in place.

param
labelToAnimate the view to pulsate.
return
The animator object. Use .start() to begin.

        Keyframe k0 = Keyframe.ofFloat(0f, 1f);
        Keyframe k1 = Keyframe.ofFloat(0.275f, decreaseRatio);
        Keyframe k2 = Keyframe.ofFloat(0.69f, increaseRatio);
        Keyframe k3 = Keyframe.ofFloat(1f, 1f);

        PropertyValuesHolder scaleX = PropertyValuesHolder.ofKeyframe("scaleX", k0, k1, k2, k3);
        PropertyValuesHolder scaleY = PropertyValuesHolder.ofKeyframe("scaleY", k0, k1, k2, k3);
        ObjectAnimator pulseAnimator =
                ObjectAnimator.ofPropertyValuesHolder(labelToAnimate, scaleX, scaleY);
        pulseAnimator.setDuration(PULSE_ANIMATOR_DURATION);

        return pulseAnimator;
public static intgetWeeksSinceEpochFromJulianDay(int julianDay, int firstDayOfWeek)
Returns the week since {@link Time#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 {@link Time#EPOCH_JULIAN_DAY} that day occurs in, starting at 0. *Do not* use this to compute the ISO week number for the year.

param
julianDay The julian day to calculate the week number for
param
firstDayOfWeek Which week day is the first day of the week, see {@link Time#SUNDAY}
return
Weeks since the epoch

        int diff = Time.THURSDAY - firstDayOfWeek;
        if (diff < 0) {
            diff += 7;
        }
        int refDay = Time.EPOCH_JULIAN_DAY - diff;
        return (julianDay - refDay) / 7;
public static booleanisJellybeanOrLater()


        
      return Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN;
public static voidtryAccessibilityAnnounce(android.view.View view, java.lang.CharSequence text)
Try to speak the specified text, for accessibility. Only available on JB or later.

param
text Text to announce.

        if (isJellybeanOrLater() && view != null && text != null) {
            view.announceForAccessibility(text);
        }