Android Open Source - CountdownWidget Date Time Util

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License

The source code is released under:
GNU General Public License
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Java Source Code

/*
 * This source is part of the/*from ww w  .j  a  v  a 2 s  . c  o m*/
 *      _____  ___   ____
 *  __ / / _ \/ _ | / __/___  _______ _
 * / // / , _/ __ |/ _/_/ _ \/ __/ _ `/
 * \___/_/|_/_/ |_/_/ (_)___/_/  \_, /
 *                              /___/
 * repository.
 * 
 * Copyright (C) 2014 Benoit 'BoD' Lubek (BoD@JRAF.org)
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.jraf.android.countdownwidget.handheld.util;

import java.text.SimpleDateFormat;
import java.util.Calendar;

import android.content.Context;
import android.text.format.Time;

import org.jraf.android.countdownwidget.common.util.StringUtil;
import org.jraf.android.util.log.wrapper.Log;

public class DateTimeUtil {

    private static int getJulianDay(Calendar cal) {
        Time time = new Time();
        time.set(cal.getTimeInMillis());
        return Time.getJulianDay(cal.getTimeInMillis(), time.gmtoff);
    }

    public static int getNbDaysToDate(Calendar from, int toYear, int toMonth, int toDay) {
        stripTime(from);
        int todayJulianDay = getJulianDay(from);

        Calendar eventCal = Calendar.getInstance();
        eventCal.set(Calendar.YEAR, toYear);
        eventCal.set(Calendar.MONTH, toMonth);
        eventCal.set(Calendar.DAY_OF_MONTH, toDay);
        stripTime(eventCal);
        int eventJulianDay = getJulianDay(eventCal);

        return eventJulianDay - todayJulianDay;
    }

    public static void stripTime(Calendar cal) {
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);
    }

    public static long getTomorrowAtEight() {
        Calendar calendar = Calendar.getInstance();
        // At eight
        stripTime(calendar);
        calendar.set(Calendar.HOUR_OF_DAY, 8);
        // Tomorrow
        calendar.add(Calendar.DAY_OF_MONTH, 1);
        return calendar.getTime().getTime();
    }

    public static long getInXSeconds(int seconds) {
        return System.currentTimeMillis() + seconds * 1000;
    }

    public static int getCountDownToEpisodeVII() {
        return getNbDaysToDate(Calendar.getInstance(), 2015, Calendar.DECEMBER, 18);
    }

    public static String getCountDownToEpisodeVIIAsText(Context context) {
        int nbDays = getCountDownToEpisodeVII();
        return StringUtil.getFormattedCountdownFull(context, nbDays);
    }

    public static void listAllDates() {
        Calendar starWarsRelease = Calendar.getInstance();
        starWarsRelease.set(Calendar.DAY_OF_MONTH, 18);
        starWarsRelease.set(Calendar.MONTH, Calendar.DECEMBER);
        starWarsRelease.set(Calendar.YEAR, 2015);
        stripTime(starWarsRelease);

        Calendar now = Calendar.getInstance();

        SimpleDateFormat sdf = new SimpleDateFormat("MMMM dd, yyyy");

        while (getJulianDay(now) <= getJulianDay(starWarsRelease)) {
            Log.d(sdf.format(now.getTime()) + " ? " + getNbDaysToDate(now, 2015, Calendar.DECEMBER, 18) + " days ");
            now.add(Calendar.DAY_OF_MONTH, 1);
        }
    }
}
Java Source Code List
