TimeUtil.java

package com.tencent.hq.qq.util;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.annotation.SuppressLint;

@SuppressLint("SimpleDateFormat")
public class TimeUtil {
	
	public final static String FORMAT_YEAR = "yyyy";
	public final static String FORMAT_MONTH_DAY = "MM��dd��";
	
	public final static String FORMAT_DATE = "yyyy-MM-dd";
	public final static String FORMAT_TIME = "HH:mm";
	public final static String FORMAT_MONTH_DAY_TIME = "MM��dd��  hh:mm";
	
	public final static String FORMAT_DATE_TIME = "yyyy-MM-dd HH:mm";
	public final static String FORMAT_DATE1_TIME = "yyyy/MM/dd HH:mm";
	public final static String FORMAT_DATE_TIME_SECOND = "yyyy/MM/dd HH:mm:ss";
	
	private static SimpleDateFormat sdf = new SimpleDateFormat();
	private static final int YEAR = 365 * 24 * 60 * 60;// ��
	private static final int MONTH = 30 * 24 * 60 * 60;// ��
	private static final int DAY = 24 * 60 * 60;// ��
	private static final int HOUR = 60 * 60;// Сʱ
	private static final int MINUTE = 60;// ����

	/**
	 * ���ʱ�����ȡ������ʱ�䣬��3����ǰ��1��ǰ
	 * 
	 * @param timestamp
	 *            ʱ��� ��λΪ����
	 * @return ʱ���ַ�
	 */
	public static String getDescriptionTimeFromTimestamp(long timestamp) {
		long currentTime = System.currentTimeMillis();
		long timeGap = (currentTime - timestamp) / 1000;// ������ʱ���������
		System.out.println("timeGap: " + timeGap);
		String timeStr = null;
		if (timeGap > YEAR) {
			timeStr = timeGap / YEAR + "��ǰ";
		} else if (timeGap > MONTH) {
			timeStr = timeGap / MONTH + "����ǰ";
		} else if (timeGap > DAY) {// 1������
			timeStr = timeGap / DAY + "��ǰ";
		} else if (timeGap > HOUR) {// 1Сʱ-24Сʱ
			timeStr = timeGap / HOUR + "Сʱǰ";
		} else if (timeGap > MINUTE) {// 1����-59����
			timeStr = timeGap / MINUTE + "����ǰ";
		} else {// 1����-59����
			timeStr = "�ո�";
		}
		return timeStr;
	}

	/**
	 * ��ȡ��ǰ���ڵ�ָ����ʽ���ַ�
	 * 
	 * @param format
	 *            ָ��������ʱ���ʽ����Ϊnull��""��ʹ��ָ���ĸ�ʽ"yyyy-MM-dd HH:MM"
	 * @return
	 */
	public static String getCurrentTime(String format) {
		if (format == null || format.trim().equals("")) {
			sdf.applyPattern(FORMAT_DATE_TIME);
		} else {
			sdf.applyPattern(format);
		}
		return sdf.format(new Date());
	}

	// date����ת��ΪString����
 	// formatType��ʽΪyyyy-MM-dd HH:mm:ss//yyyy��MM��dd�� HHʱmm��ss��
 	// data Date���͵�ʱ��
 	public static String dateToString(Date data, String formatType) {
 		return new SimpleDateFormat(formatType).format(data);
 	}
 
 	// long����ת��ΪString����
 	// currentTimeҪת����long���͵�ʱ��
 	// formatTypeҪת����string���͵�ʱ���ʽ
 	public static String longToString(long currentTime, String formatType){
 		String strTime="";
		Date date = longToDate(currentTime, formatType);// long����ת��Date����
		strTime = dateToString(date, formatType); // date����ת��String 
 		return strTime;
 	}
 
 	// string����ת��Ϊdate����
 	// strTimeҪת����string���͵�ʱ�䣬formatTypeҪת���ĸ�ʽyyyy-MM-dd HH:mm:ss//yyyy��MM��dd��
 	// HHʱmm��ss�룬
 	// strTime��ʱ���ʽ����Ҫ��formatType��ʱ���ʽ��ͬ
 	public static Date stringToDate(String strTime, String formatType){
 		SimpleDateFormat formatter = new SimpleDateFormat(formatType);
 		Date date = null;
 		try {
			date = formatter.parse(strTime);
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
 		return date;
 	}
 
 	// longת��ΪDate����
 	// currentTimeҪת����long���͵�ʱ��
 	// formatTypeҪת����ʱ���ʽyyyy-MM-dd HH:mm:ss//yyyy��MM��dd�� HHʱmm��ss��
 	public static Date longToDate(long currentTime, String formatType){
 		Date dateOld = new Date(currentTime); // ���long���͵ĺ���������һ��date���͵�ʱ��
 		String sDateTime = dateToString(dateOld, formatType); // ��date���͵�ʱ��ת��Ϊstring
 		Date date = stringToDate(sDateTime, formatType); // ��String����ת��ΪDate����
 		return date;
 	}
 
 	// string����ת��Ϊlong����
 	// strTimeҪת����String���͵�ʱ��
 	// formatTypeʱ���ʽ
 	// strTime��ʱ���ʽ��formatType��ʱ���ʽ������ͬ
 	public static long stringToLong(String strTime, String formatType){
 		Date date = stringToDate(strTime, formatType); // String����ת��date����
 		if (date == null) {
 			return 0;
 		} else {
 			long currentTime = dateToLong(date); // date����ת��long����
 			return currentTime;
 		}
 	}
 
 	// date����ת��Ϊlong����
 	// dateҪת����date���͵�ʱ��
 	public static long dateToLong(Date date) {
 		return date.getTime();
 	}
	 	
	public static String getTime(long time) {
		SimpleDateFormat format = new SimpleDateFormat("yy-MM-dd HH:mm");
		return format.format(new Date(time));
	}

	public static String getHourAndMin(long time) {
		SimpleDateFormat format = new SimpleDateFormat("HH:mm");
		return format.format(new Date(time));
	}

	/** ��ȡ����ʱ�䣺��Ϊsdk��ʱ��Ĭ�ϵ����Ӧ�ó�1000
	  * @Title: getChatTime
	  * @Description: TODO
	  * @param @param timesamp
	  * @param @return 
	  * @return String
	  * @throws
	  */
	public static String getChatTime(long timesamp) {
		long clearTime = timesamp*1000;
		String result = "";
		SimpleDateFormat sdf = new SimpleDateFormat("dd");
		Date today = new Date(System.currentTimeMillis());
		Date otherDay = new Date(clearTime);
		int temp = Integer.parseInt(sdf.format(today))
				- Integer.parseInt(sdf.format(otherDay));

		switch (temp) {
		case 0:
			result = "今天 " + getHourAndMin(clearTime);
			break;
		case 1:
			result = "昨天" + getHourAndMin(clearTime);
			break;
		case 2:
			result = "前天 " + getHourAndMin(clearTime);
			break;

		default:
			result = getTime(clearTime);
			break;
		}

		return result;
	}
}