This article describes the date tool class DateUtil in Android development. Share it for your reference, as follows:
/**
* Date operation tool class.
* @Project ERPForAndroid
* @Package
* @author chenlin
* @version 1.0
*/
@SuppressLint("SimpleDateFormat")
public class DateUtil {
private static final String FORMAT = "yyyy-MM-dd HH:mm:ss";
private static final SimpleDateFormat datetimeFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
private static final SimpleDateFormat timeFormat = new SimpleDateFormat("HH:mm:ss");
public static Date str2Date(String str) {
return str2Date(str, null);
}
/**
* String to time
* @param str
* @param format
* @return
*/
public static Date str2Date(String str, String format) {
if (str == null || () == 0) {
return null;
}
if (format == null || () == 0) {
format = FORMAT;
}
Date date = null;
try {
SimpleDateFormat sdf = new SimpleDateFormat(format);
date = (str);
} catch (Exception e) {
();
}
return date;
}
public static Calendar str2Calendar(String str) {
return str2Calendar(str, null);
}
public static Calendar str2Calendar(String str, String format) {
Date date = str2Date(str, format);
if (date == null) {
return null;
}
Calendar c = ();
(date);
return c;
}
public static String date2Str(Calendar c) {// yyyy-MM-dd HH:mm:ss
return date2Str(c, null);
}
public static String date2Str(Calendar c, String format) {
if (c == null) {
return null;
}
return date2Str((), format);
}
public static String date2Str(Date d) {// yyyy-MM-dd HH:mm:ss
return date2Str(d, null);
}
public static String date2Str(Date d, String format) {// yyyy-MM-dd HH:mm:ss
if (d == null) {
return null;
}
if (format == null || () == 0) {
format = FORMAT;
}
SimpleDateFormat sdf = new SimpleDateFormat(format);
String s = (d);
return s;
}
public static String getCurDateStr() {
Calendar c = ();
(new Date());
return () + "-" + (() + 1) + "-" + (Calendar.DAY_OF_MONTH) + "-"
+ (Calendar.HOUR_OF_DAY) + ":" + () + ":" + ();
}
/**
* Get the string format of the current date
*
* @param format
* @return
*/
public static String getCurDateStr(String format) {
Calendar c = ();
return date2Str(c, format);
}
/**
* Format to seconds
*
* @param time
* @return
*/
public static String getMillon(long time) {
return new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(time);
}
/**
* Format to day
*
* @param time
* @return
*/
public static String getDay(long time) {
return new SimpleDateFormat("yyyy-MM-dd").format(time);
}
/**
* Format to milliseconds
*
* @param time
* @return
*/
public static String getSMillon(long time) {
return new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss-SSS").format(time);
}
/**
* Convert string to time format
*
* @param dateStr
* string to convert
* @param formatStr
* The target string that requires formatting Example yyyy-MM-dd
* @return Date Returns the converted time
* @throws ParseException
* Conversion exception
*/
public static Date StringToDate(String dateStr, String formatStr) {
DateFormat sdf = new SimpleDateFormat(formatStr);
Date date = null;
try {
date = (dateStr);
} catch (ParseException e) {
();
}
return date;
}
/**
* The interval between the conversion time input time and the current time
*
* @param timestamp
* @return
*/
public static String converTime(long timestamp) {
long currentSeconds = () / 1000;
long timeGap = currentSeconds - timestamp;// The number of seconds difference from the current time String timeStr = null;
if (timeGap > 24 * 60 * 60) {// More than 1 day timeStr = timeGap / (24 * 60 * 60) + "Day Ago";
} else if (timeGap > 60 * 60) {// 1 hour-24 hours timeStr = timeGap / (60 * 60) + "Hour ago";
} else if (timeGap > 60) {// 1 minute-59 minutes timeStr = timeGap / 60 + "Minutes ago";
} else {// 1 second - 59 seconds timeStr = "just";
}
return timeStr;
}
/**
* Convert strings to time format
*
* @param timestamp
* @return
*/
public static String getStandardTime(long timestamp) {
SimpleDateFormat sdf = new SimpleDateFormat("MM month dd day HH:mm");
Date date = new Date(timestamp * 1000);
(date);
return (date);
}
/**
* Get the current date and time Date time format yyyy-MM-dd HH:mm:ss
*
* @return
*/
public static String currentDatetime() {
return (now());
}
/**
* Format date and time Date and time format yyyy-MM-dd HH:mm:ss
*
* @return
*/
public static String formatDatetime(Date date) {
return (date);
}
/**
* Get the current time Time format HH:mm:ss
*
* @return
*/
public static String currentTime() {
return (now());
}
/**
* Format time Time format HH:mm:ss
*
* @return
*/
public static String formatTime(Date date) {
return (date);
}
/**
* Get the <code></code> object of the current time
*
* @return
*/
public static Date now() {
return new Date();
}
public static Calendar calendar() {
Calendar cal = ();
();
return cal;
}
/**
* Get the milliseconds of the current time
*
* See {@link System#currentTimeMillis()} for details
*
* @return
*/
public static long millis() {
return ();
}
/**
*
* Get the current Chinese month
*
* @return
*/
public static int month() {
return calendar().get() + 1;
}
/**
* What day of the month you get
*
* @return
*/
public static int dayOfMonth() {
return calendar().get(Calendar.DAY_OF_MONTH);
}
/**
* What day of the week is today
*
* @return
*/
public static int dayOfWeek() {
return calendar().get(Calendar.DAY_OF_WEEK);
}
/**
* What day of the year is today
*
* @return
*/
public static int dayOfYear() {
return calendar().get(Calendar.DAY_OF_YEAR);
}
/**
* Determine whether the original date is before the target date
*
* @param src
* @param dst
* @return
*/
public static boolean isBefore(Date src, Date dst) {
return (dst);
}
/**
* Determine whether the original date is after the target date
*
* @param src
* @param dst
* @return
*/
public static boolean isAfter(Date src, Date dst) {
return (dst);
}
/**
* Determine whether the two dates are the same
*
* @param date1
* @param date2
* @return
*/
public static boolean isEqual(Date date1, Date date2) {
return (date2) == 0;
}
/**
* Determine whether a date is within a certain date range
*
* @param beginDate
* Date range starts
* @param endDate
* End of date range
* @param src
* Date to be judged
* @return
*/
public static boolean between(Date beginDate, Date endDate, Date src) {
return (src) && (src);
}
/**
* Get the last day of the current month
*
* HH:mm:ss is 0, milliseconds is 999
*
* @return
*/
public static Date lastDayOfMonth() {
Calendar cal = calendar();
(Calendar.DAY_OF_MONTH, 0); //M month set zero (Calendar.HOUR_OF_DAY, 0);// H sets zero (, 0);// m set zero (, 0);// s set zero (, 0);// S set zero (, () + 1);// Month +1 (, -1);// milliseconds-1 return ();
}
/**
* Get the first day of the current month
*
* HH:mm:ss SS is zero
*
* @return
*/
public static Date firstDayOfMonth() {
Calendar cal = calendar();
(Calendar.DAY_OF_MONTH, 1); //M month set 1 (Calendar.HOUR_OF_DAY, 0);// H sets zero (, 0);// m set zero (, 0);// s set zero (, 0);// S set zero return ();
}
private static Date weekDay(int week) {
Calendar cal = calendar();
(Calendar.DAY_OF_WEEK, week);
return ();
}
/**
* Get Friday date
*
* Note: Calendar factory method {@link #calendar()} set the first day of each week to Monday, US, etc., the first day of each week to sunday
*
* @return
*/
public static Date friday() {
return weekDay();
}
/**
* Get Saturday date
*
* Note: Calendar factory method {@link #calendar()} set the first day of each week to Monday, US, etc., the first day of each week to sunday
*
* @return
*/
public static Date saturday() {
return weekDay();
}
/**
* Get Sunday date Note: Calendar factory method {@link #calendar()} Set the first day of each week to Monday, US, etc. The first day of each week to sunday
*
* @return
*/
public static Date sunday() {
return weekDay();
}
/**
* Convert string date and time to type Date and time format yyyy-MM-dd HH:mm:ss
*
* @param datetime
* @return
*/
public static Date parseDatetime(String datetime) throws ParseException {
return (datetime);
}
/**
* Convert string date to type Date time format yyyy-MM-dd
*
* @param date
* @return
* @throws ParseException
*/
public static Date parseDate(String date) throws ParseException {
return (date);
}
/**
* Convert string date to type Time format HH:mm:ss
*
* @param time
* @return
* @throws ParseException
*/
public static Date parseTime(String time) throws ParseException {
return (time);
}
/**
* Convert string date to type according to custom pattern
*
* @param datetime
* @param pattern
* @return
* @throws ParseException
*/
public static Date parseDatetime(String datetime, String pattern) throws ParseException {
SimpleDateFormat format = (SimpleDateFormat) ();
(pattern);
return (datetime);
}
/**
* Format seconds into seconds
*
* @param second
* @return
*/
public static String parseSecond(int second) {
if (second >= 60) {
return second / 60 + "point";
} else if (second >= 60 * 60) {
return second / 60 * 60 + "hour";
} else if (second >= 60 * 60 * 24) {
return second / 60 * 60 + "sky";
} else {
return second + "Second";
}
}
/**
* Compare time size
* @param begin
* @param end
* @return
*/
public static int compareDate(String begin, String end) {
DateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm");
try {
Date beginDate = (begin);
Date endDate = (end);
if (() < ()) {
return 1;
} else if (() > ()) {
return -1;
} else {
return 0;
}
} catch (Exception exception) {
();
}
return 0;
}
/**
* Year of obtaining
* @param date
* @return
*/
public int getYear(Date date){
Calendar c = ();
(date);
return ();
}
/**
* Get Month
* @param date
* @return
*/
public int getMonth(Date date){
Calendar c = ();
(date);
return () + 1;
}
/**
* Get the day of the week
* @param date
* @return
*/
public int getWeek(Date date){
Calendar c = ();
(date);
return (Calendar.WEEK_OF_YEAR);
}
/**
* Date of acquisition
* @param date
* @return
*/
public int getDay(Date date){
Calendar c = ();
(date);
return ();
}
/**
* Get the difference in days
* @param begin
* @param end
* @return
*/
public long getDayDiff(Date begin, Date end){
long day = 1;
if(() < ()){
day = -1;
}else if(() == ()){
day = 1;
}else {
day += (() - ())/(24 * 60 * 60 * 1000) ;
}
return day;
}
}
PS: Here are a few online tools for your reference:
Online Date/Day Calculator:
http://tools./jisuanqi/date_jisuanqi
Online Perpetual Calendar:
http://tools./bianmin/wannianli
Online Lunar/Gregorian calendar conversion tool:
http://tools./bianmin/yinli2yangli
Unix timestamp conversion tool:
http://tools./code/unixtime
For more information about Android related content, please check out the topic of this site:Android date and time operation skills summary》、《Android development introduction and advanced tutorial》、《Summary of the usage of basic Android components》、《Android View View Tips Summary》、《Android layout layout tips summary"and"Android control usage summary》
I hope this article will be helpful to everyone's Android programming design.