session-android/src/org/thoughtcrime/securesms/util/DateUtils.java

package org.thoughtcrime.securesms.util;

import android.content.Context;

import java.util.Calendar;

/**
 * Created by kaonashi on 1/6/14.
 */
public class DateUtils extends android.text.format.DateUtils {

  private final static long DAY_IN_MILLIS  = 86400000L;
  private final static long WEEK_IN_MILLIS = 7 * DAY_IN_MILLIS;
  private final static long YEAR_IN_MILLIS = (long)(52.1775 * WEEK_IN_MILLIS);

  private static boolean isWithinWeek(final long millis) {
    return System.currentTimeMillis() - millis <= (WEEK_IN_MILLIS - DAY_IN_MILLIS);
  }

  private static boolean isWithinYear(final long millis) {
    return System.currentTimeMillis() - millis <= YEAR_IN_MILLIS;
  }

  public static String getBetterRelativeTimeSpanString(final Context c, final long millis) {
    final String prettyDate;
    if (isToday(millis)) {
      prettyDate = DateUtils.formatDateTime(c, millis, DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_ABBREV_TIME);
    } else if (isWithinWeek(millis)) {
      prettyDate = DateUtils.formatDateTime(c, millis,
          DateUtils.FORMAT_SHOW_WEEKDAY | DateUtils.FORMAT_ABBREV_WEEKDAY | DateUtils.FORMAT_SHOW_TIME);
    } else if (isWithinYear(millis)) {
      prettyDate = DateUtils.formatDateTime(c, millis,
          DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_NO_YEAR | DateUtils.FORMAT_ABBREV_ALL);
    } else {
      prettyDate = DateUtils.formatDateTime(c, millis,
          DateUtils.FORMAT_NUMERIC_DATE);
    }
    return prettyDate;
  }
}