Android Open Source - VideoRecorder Date Util

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (C) 2014 The Android Open Source Project
 *// w  ww . ja v  a2s.co m
 * 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.
 *
 * Auther?yinglovezhuzhu@gmail.com
 * File: DateUtil.java
 * Date?2014?1?2?
 * Version?v1.0
 */  
package com.opensource.videorecorder.utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Locale;

/**
 * ???????????
 * @author yinglovezhuzhu@gmail.com
 */
public class DateUtil {
  private DateUtil() {}
  
  /**
   * ???????????
   * @param pattern ?????
   * @return
   */
  public static String getSystemDate(String pattern) {
    SimpleDateFormat dateFormat = new SimpleDateFormat(pattern, Locale.getDefault());
    return dateFormat.format(new Date(System.currentTimeMillis()));
  }
  
  /**
   * ?????????
   * @return ????
   */
  public static int getYear() {
    Calendar c = Calendar.getInstance(Locale.getDefault());
    return c.get(Calendar.YEAR);
  }
  
  /**
   * ?????
   * @param timeSecond ????????
   * @return
   */
  public static int getDay(long milliseconds) {
    SimpleDateFormat dateFormat = new SimpleDateFormat("d", Locale.getDefault());
    String day = dateFormat.format(new Date(milliseconds));
    try {
      return Integer.valueOf(day);
    } catch (Exception e) {
      e.printStackTrace();
    }
    return 0;
  }
  
  /**
   * The seconds1 is the same day with seconds2.(????)
   * @param seconds1
   * @param seconds2
   * @return
   */
  public static boolean isSameDay(long seconds1, long seconds2) {
    return Math.abs(seconds1 - seconds2) < 86400;
  }
  
  /**
   * ??????????????????
   * @param backStep ???????????
   * @param minYear ?????????????????????????????????????
   * @return
   */
  public static List<Integer> getYears(int backStep, int minYear) {
    List<Integer> years = new ArrayList<Integer>();
    int year = getYear();
    for (int i = 0; i < backStep; i++) {
      if(year - i < minYear) {
        break;
      }
      years.add(year - i);
    }
    return years;
  }
  
  /**
   * ????????
   * @param pattern
   * @return
   */
  public static String getYesterdayDate(String pattern) {
    SimpleDateFormat dateFormat = new SimpleDateFormat(pattern, Locale.getDefault());
    Calendar calendar = Calendar.getInstance(Locale.getDefault());
    calendar.set(Calendar.DAY_OF_MONTH, calendar.get(Calendar.DAY_OF_MONTH) - 1);
    return dateFormat.format(calendar.getTime());
  }
  
  /**
   * ???????????srcPattern?????????distPattern
   * ????????????????????????????????????????????????????????????????????????????
   * ???????????????????????????????????????????????????????????????????????????
   * ?????????????????????????
   * @param source
   * @param srcPattern
   * @param distPattern
   * @return ?????????????????????????????????????????
   */
  public static String changeFormat(String source, String srcPattern, String distPattern) {
    SimpleDateFormat srcFormt = new SimpleDateFormat(srcPattern, Locale.getDefault());
    SimpleDateFormat distFormt = new SimpleDateFormat(distPattern, Locale.getDefault());
    try {
      return distFormt.format(srcFormt.parse(source));
    } catch (ParseException e) {
      e.printStackTrace();
      return source;
    }
  }
  
  /**
   * Format date.
   * @param pattern
   * @param milliseconds
   * @return
   */
  public static String format(String pattern, long milliseconds) {
    SimpleDateFormat dateFormat = new SimpleDateFormat(pattern, Locale.getDefault());
    try {
      return dateFormat.format(new Date(milliseconds));
    } catch (Exception e) {
      e.printStackTrace();
    }
    return "";
  }
}

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