java/com/android/contacts/common/util/DateUtils.java

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.contacts.common.util;

import android.text.format.Time;

/** Utility methods for processing dates. */
public class DateUtils {

  /**
   * Determine the difference, in days between two dates. Uses similar logic as the {@link
   * android.text.format.DateUtils.getRelativeTimeSpanString} method.
   *
   * @param time Instance of time object to use for calculations.
   * @param date1 First date to check.
   * @param date2 Second date to check.
   * @return The absolute difference in days between the two dates.
   */
  public static int getDayDifference(Time time, long date1, long date2) {
    time.set(date1);
    int startDay = Time.getJulianDay(date1, time.gmtoff);

    time.set(date2);
    int currentDay = Time.getJulianDay(date2, time.gmtoff);

    return Math.abs(currentDay - startDay);
  }
}