How to convert double to date?
"orderDate":1538398507000,
this is how I'm getting date, and I'm converting it to date
Date d = new Date(myOrderDataList.get(position).getOrderDate()*1000);
but it shows 1970 as a year
Try this
private String getStringDate(long time) {
Calendar cal = Calendar.getInstance(Locale.ENGLISH);
cal.setTimeInMillis(time);
String date = DateFormat.format("dd-MM-yyyy", cal).toString();
return date;
}
Since your double represents the number of seconds of you date from now, and the Date constructor in Java is expecting a number of milliseconds since 01-01-1970, you have to multiply your number to get a number of milliseconds (* 1000) and substract that from the current number of milliseconds since 01-01-1970 (System.currentTimeMillis()):
double myDouble = -242528463.775282;
long myLong = System.currentTimeMillis() + ((long) (myDouble * 1000));
System.out.println(myLong);
Date itemDate = new Date(myLong);
String myDateStr = new SimpleDateFormat("dd-MM-yyyy").format(itemDate);
System.out.println(myDateStr);
But, the problem with the way you store your dates is that if you are calling this code today and tomorrow it will not return the same date, as the current time is changing. You should use timeIntervalSince1970 instead of timeIntervalSinceNow.
Related
I'm quite new to Android and I want to change (I know how to set it dynamically but....)Textview Dynamically after a certain period of Days,but int the meantime keep the text posted unless changed by user or if a certain days have been reached by my program.
Well Basically I have the user to input a Date then i want my program to count days and as long as the user nor my program have intervene with the textview it will show the same text and backround color until the opposite is taken action.
here is my code:
String CurrentDate = new SimpleDateFormat("dd/MM/yyyy").format(new Date());
String FinalDate = TvDateOfService.getText().toString();
SimpleDateFormat dates = new SimpleDateFormat("dd/MM/yyyy");
Date dateinput;
Date datetwra;
//Setting dates
try {
dateinput = dates.parse(FinalDate);
datetwra = dates.parse(CurrentDate);
//Comparing dates
long difference = Math.abs(dateinput.getTime() - datetwra.getTime());
long differenceDates = difference / (24 * 60 * 60 * 1000);
//Convert long to String
String dayDifference = Long.toString(differenceDates);
//Calendar Instance to Add 89 Days for Service Period Between Dates!!
Calendar cal1 = Calendar.getInstance();
cal1.add(Calendar.DATE, 90);
Date ServicePeriod = cal1.getTime();
Calendar cal2 = Calendar.getInstance();
cal2.add(Calendar.DATE, 80);
Date DaysBeforeEnd = cal2.getTime();
do {
tvStatus.setBackground(getApplicationContext().getResources().getDrawable(R.drawable.textview_backround_green));
}while (dateinput.before(DaysBeforeEnd));
do {
tvStatus.setText("something");
tvStatus.setBackground(getApplicationContext().getResources().getDrawable(R.drawable.textview_backround_yellow));
}while (dateinput.after(DaysBeforeEnd));
do {
tvStatus.setText("something else");
tvStatus.setBackground(getApplicationContext().getResources().getDrawable(R.drawable.textview_backround_red));
}while (dateinput.after(ServicePeriod));
It looks like you're trying to use a for loop and wait a certain number of days - it would be most beneficial to the phone's battery if you used AlarmManager
https://developer.android.com/trai.../scheduling/alarms.html
I want my app to show the time elapsed from the point an entry was stored in the database to the point it is fetched from the database.
I am currently doing something like this which gives me time elapsed in seconds:
SimpleDateFormat sdf = new SimpleDateFormat("hh:mm:ss aa");
Date systemDate = Calendar.getInstance().getTime();
String myDate = sdf.format(systemDate);
Date Date1 = sdf.parse(myDate);
Date Date2 = sdf.parse(savedDate);
int dateDiff = getTimeRemaining();
long millse = Date1.getTime() - Date2.getTime();
long mills = Math.abs(millse);
long Mins = mills/(1000*60);
String diff = +dateDiff+ "days " + Mins+ " mins";
cal[1] = "" +Mins;
t3.setText(diff);
But I also want it to include the no of days since the data was stored. As of now, it resets when the day is over. I want it to give me the total minutes after N days. How should I do it? Thanks in advance.
You firstly need to determine the number of seconds from database-stored-time until now.
long ageOfDatabaseEntry = (System.currentTimeMillis() - databaseEnteredTimeMillis)
You then need to determine how many days you want, then modulo the age by that number to get the remaining number of milliseconds.
long getRemainingMinutes(long age, int days) {
// Use the modulus operator to get the remainder of the age and days
long remainder = age % (days * 86400000);
if(remainder == age) {
throw new InvalidArgumentException("The number of days required exceeds the age of the database entry. Handle this properly.");
}
// Turn the remainder in milliseconds into minutes and return it
return remainder / 60000;
}
i want to compare a date with the current date and do something if the difference is 2 months or 6 or a year .. but i have a problem how to get the correct difference for example if the current month is 02 2015 and the other month is 10 2014 i will get 8 in difference but the actual difference is 4 .. how to do it ?
Calendar c = Calendar.getInstance();
System.out.println("Current time => " + c.getTime());
SimpleDateFormat d = new SimpleDateFormat("dd");
SimpleDateFormat m = new SimpleDateFormat("MM");
SimpleDateFormat ye = new SimpleDateFormat("yyyy");
String day = d.format(c.getTime());
String month = m.format(c.getTime());
String year = ye.format(c.getTime());
int d1=Integer.parseInt(day);
int m1=Integer.parseInt(month);
int d2=25;
int m2=02;
int diff=d1-d2;
String s=String.valueOf(diff);
You are calculating your difference between two int, so it can't work.
You should calculate it between two dates or two long (in secondes or milliseconds)
long oneDay, today, delay;
oneDay = 1000*3600*24; //number of milliseconds in a day
today = Calendar.getInstance().getTimeInMillis();
delay = (TheDateYouWantToCompare - today)/oneDay;
if (delay >= 60*oneDay) { //more than 2 months
//your code
}else{
//your code
}
If TheDateYouWantToCompare and today are dates, it's almost the same :
delay = (TheDateYouWantToCompare.getTime() - today.getTime())/oneDay;
Edit :
Here it is how to get time in milliseconds.
String DateString = "31-12-2015";
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");
Date myDate = sdf.parse(DateString);
long timeInMilliseconds = myDate.getTime();
You could just use the difference in milliseconds between the 2 dates. Pre-compute the differences you need/want as constants and compare to the delta you have, for example:
static final long DAY = 1000 * 60 * 60 * 25;
static final long MONTH = DAY * 30;
...
int diff = d1 - d2;
if(diff > MONTH) {
//more than a month difference
}
If you need something more complex you should perhaps use a library such as Joda Time which will give a more comprehensive set of features to work with time.
How to find out the values of GMT for user for example it is +05:30 for India.
How do calculate this +05:30 value in Android ?
I need this because I am using a java library in my app which has a function with this +05:30 field and I want to generate this field by calculation so that I wont have to fill up individual values for countries.
This is what works awesome
public double getOffset(){
TimeZone timezone = TimeZone.getDefault();
int seconds = timezone.getOffset(Calendar.ZONE_OFFSET)/1000;
double minutes = seconds/60;
double hours = minutes/60;
return hours;
}
First get the epoch system time
System.currentTimeMillis()
Then use a date object, set the time zone to GMT and initialize with the long valye
dateObj.setTimeZone(TimeZone.getTimeZone("GMT"))
To get time in GMT use below function where dateInString is the value of date,and format is date format as yyyyMMddHH
public static long getDate(String dateInString,String format){
long date = 0;
SimpleDateFormat dateFormat = new SimpleDateFormat(format);
try {
dateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
Date d = dateFormat.parse(dateInString);
date = d.getTime();
} catch (ParseException e) {
e.printStackTrace();
}
return date;
}
Use below method to get UTC :-
public int GetUnixTime()
{
Calendar calendar = Calendar.getInstance();
long now = calendar.getTimeInMillis();
int utc = (int)(now / 1000);
return (utc);
}
after you get UTC now compared it to the Epoch in this site http://www.xav.com/time.cgi.
see this below link :-
How can I get the current date and time in UTC or GMT in Java?
If you store a map between timezones and their GMT offsets in your app, you can call TimeZone.getDefault() to get the device's timezone and do a quick lookup to return the GMT offset. That way you don't have to rely on potentially tricky date/time calculations and can be sure you have the correct value.
I am writing an application in which I have to display a date . Now I want to convert that date into Year and Month from the Current Date.
My Date is Like - 29/03/2017.
I want to convert this date into Year and Months.
Sorry I think you are not able to understand my question. I want the Difference of current date and above date in year and months.
Sorry for my explanation.
You can use Joda Time and compute a Period between two LocalDate values (which is what you've got here) using months and years as the units.
example
LocalDate dob = new LocalDate(1992, 12, 30);
LocalDate date = new LocalDate(2010, 12, 29);
Period period = new Period(dob, date, PeriodType.yearMonthDay());
System.out.println(period.getYears() + " years and " +
period.getMonths() + " months");
I found my answer using Calender class .
First i find the difference between two days and using that days i found the years and months.
Here i post my code, which i think help to others.
int days = Integer.parseInt(Utility.getDateDiffString("29/03/2017"));
int years = days/365;
int remainingDays = days - (365*years);
int months = remainingDays/30;
getDateDiffString() Method. In this method we need to pass end date
public static String getDateDiffString(String endDate)
{
try
{
Calendar cal = Calendar.getInstance();
SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
Date dateTwo = dateFormat.parse(endDate);
long timeOne = cal.getTimeInMillis();
long timeTwo = dateTwo.getTime();
long oneDay = 1000 * 60 * 60 * 24;
long delta = (timeTwo - timeOne) / oneDay;
if (delta > 0) {
return "" + delta + "";
}
else {
delta *= -1;
return "" + delta + "";
}
}
catch (Exception e)
{
e.printStackTrace();
}
return "";
}
if your date's format is fixed, you can do it like this :
String myDate = "29/03/2017";
String newDate = myDate.subString(6, 10) + "-" + myDate.subString(3, 5)
this method to convert the normal string to date format
String currentDateString = "02/27/2012 17:00:00";
SimpleDateFormat sd = new SimpleDateFormat("mm/dd/yyyy HH:mm:ss");
Date currentDate = sd.parse(currentDateString);
after that you get the formal method
You Should use SimpleDateFormate !
For Example:--- You can get time & Date as you want:-
Date email_date = m.getSentDate();// this is date which you are getting
DateFormat date = new SimpleDateFormat("EEE MMM yyyy");
DateFormat time = new SimpleDateFormat("hh:mm aa");
String date_str=date.format(email_date);
String time_str=time.format(email_date);
Use Java Calendar class to get year from date
Calendar c=Calendar.getInstance();
SimpleDateFormat simpleDateformat=new SimpleDateFormat("yyyy MMM");
System.out.println(simpleDateformat.format(c.getTime()));
To get difference between two date
int diffInDays = (int)( (newerDate.getTime() - olderDate.getTime())
/ (1000 * 60 * 60 * 24) )
long timeDiff = (d1.getTime() - d2.getTime());
String diff=String.format("%d year(s) %d day(s) %d hour(s) %d min(s) %d sec(s)",(TimeUnit.MILLISECONDS.toDays(timeDiff)/365),TimeUnit.MILLISECONDS.toDays(timeDiff)%365,
TimeUnit.MILLISECONDS.toHours(timeDiff)
- TimeUnit.DAYS.toHours(TimeUnit.MILLISECONDS
.toDays(timeDiff)),
TimeUnit.MILLISECONDS.toMinutes(timeDiff)
- TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS
.toHours(timeDiff)),
TimeUnit.MILLISECONDS.toSeconds(timeDiff)
- TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS
.toMinutes(timeDiff)));
System.out.println(diff);
Specify correct date here in d1 & d2.Then you will get right answer of difference
First put your Date into a String variable as:
String dateToConvert = "29/03/2017";
Instantiate Calendar as:
Calendar convertedDate = Calendar.getInstance();
Set that date to calendar
convertedDate.set(dateToConvert);<br/>
Then use this line:
String datePicked = DateFormat.getDateInstance().format(convertedDate.getTime());
Output: Mar 29, 2017