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Can't Set correct date and time to Calendar

I am getting date time as String in this format from the server:2017-11-15 16:27:02
I want to set Calendar with this time so I Do something like this:
String[] dateTime = response.body().getUser().getUserSessionExpire().split(" ");
String[] date = dateTime[0].split("-");
String[] time = dateTime[1].split(":");
Log.i("TIMMEE", "Received TIME: " + response.body().getUser().getUserSessionExpire());
int month = Integer.parseInt(date[1]);
int day = Integer.parseInt(date[2]);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.YEAR, Integer.parseInt(date[0]));
calendar.set(Calendar.MONTH, month);
calendar.set(Calendar.DAY_OF_MONTH, day);
calendar.set(Calendar.HOUR, Integer.parseInt(time[0]));
calendar.set(Calendar.MINUTE, Integer.parseInt(time[1]));
calendar.set(Calendar.SECOND, Integer.parseInt(time[2]));
For example, if I get
2017-11-15 16:27:02
Calendar will set for :
2017-12-15 16:27:02 Or 2017-11-16 16:27:02
Actually, Month or Day will change!
What is the problem?
Thankyou for your answers.

You do not need to split the date . SimpleDateFormat is responsible for formating . So you can parse the date and get Date object from it . See code below and read the SimpleDateFormat(linked above).
Calendar calendar=Calendar.getInstance();
SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd H:m:s", Locale.getDefault());
try {
Date d = DATE_FORMAT.parse("2017-11-15 16:27:02");
calendar.setTime(d);// Use this calender
} catch (ParseException e) {
e.printStackTrace();
}

How to fetch recent seven days from specific date

If the date is 2017-03-30 that i want to fetch the date from 2017-03-23 to 2017-03-30
I try to use this code let my String change to Date format
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date dateParse = sdf.parse("2017-03-30");
then i'm stuck , cause i take the reference is get the current time like this
Calendar c = Calendar.getInstance();
c.add(Calendar.DATE, -7);
//may be my dateParse should put here , but i don't know how to do
Date monday = c.getTime();//it get the current time
String preMonday = sdf.format(monday);
Is any one can teach me how to fetch these seven days ? Thanks in advance.

You can use the code below
SimpleDateFormatdateFormat = new SimpleDateFormat("dd MMM yyyy");
Calendar c = Calendar.getInstance();
String date = dateFormat.format(c.getTime());
c.add(Calendar.DATE, 7);
String date1 = dateFormat.format(c.getTime());

Parse the date:
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date myDate = sdf.parse("2017-03-30");
First Solution 1) And then either figure out how many milliseconds you need to subtract:
Date newDate = new Date(myDate.getTime() - 604800000L); // 7 * 24 * 60 * 60 * 1000
Second Solution 2) Or use the API provided by the java.util.Calendar class:
Calendar calendar = Calendar.getInstance();
calendar.setTime(myDate);
calendar.add(Calendar.DAY_OF_YEAR, -7);
Date newDate = calendar.getTime();
Then, if you need to, convert it back to a String:
String date = dateFormat.format(newDate);
This answer is from here
EDIT:
If you need output as 2017-03-29 2017-03-28 2017-03-27 ...... 2017-03-23 then try below code
for(int i = 1; i <= 7; i++){
Calendar calendar = Calendar.getInstance();
calendar.setTime(myDate);
calendar.add(Calendar.DAY_OF_YEAR, -i);
Date newDate = calendar.getTime();
String date = dateFormat.format(newDate);
//here in date you can get all date from and output as 2017-03-29 2017-03-28 2017-03-27 ...... 2017-03-23
}
Hope you need this

Date object from simple string - Java and Android [duplicate]

This question already has answers here:
How to get the day, year, hours, min Individually from date format "yyyy-MM-dd'T'HH:mm:ss.SSSZ"?
(4 answers)
Closed 9 years ago.
specific date is "2013-11-12".
I want to extract day, month and year from above date. Please let me know how can I extract?

You can use split().
Example :
String mydate="2013-11-12"; //year-month-day
String myyear=mydate.split("-")[0]; //0th index = 2013
String mymonth=mydate.split("-")[1]; //1st index = 11
String myday=mydate.split("-")[2]; //2nd index = 12

you can use substring method to extract the particular characters from the above string like:
String year=date.substring(0,4); //this will return 2013
String month=date.substring(5,7); //this will return 11
String day=date.substring(8,10); //this will return 12

You can also use Calendar
Calendar calendar = Calendar.getInstance();
calendar.setTime(new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH).parse("2013-11-12"));
int day = calendar.get(Calendar.DAY_OF_MONTH);
int month = calendar.get(Calendar.MONTH);
int year = calendar.get(Calendar.YEAR);

You can do it using SimpleDateFormat and Calendar Class.
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("EEE MMM dd HH:mm:ss z yyyy");
cal.setTime(sdf.parse("Mon Mar 14 16:02:37 GMT 2011"));// all done
Now you can use this cal Object to do whatever you want. Not just the date, month or year. you cam use it to perform various operations, such as add month, add year etc...

Create date object from your date string first, like...
String yourDateString = "2013-11-12";
SimpleDateFormat parser = new SimpleDateFormat("yyyy-MM-dd");
Date yourDate = parser.parse(yourDateString);
Now create Calender instance to get further information about date...
Calendar calendar = Calendar.getInstance();
calendar.setTime(yourDate);
int months = calendar.get(Calendar.DAY_OF_MONTH);
int seconds = calendar.get(Calendar.SECOND);
// and similarly use calender.getXXX
Hope this helps...

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date testDate = null;
try {
testDate = sdf.parse("2013-11-12");
}
catch(Exception ex) {
ex.printStackTrace();
}
int date= testDate.getDate();
int month = testDate.getMonth();
int year = testDate.getYear();

How to get day from specified date in android

Suppose my date is 02-01-2013
and it is stored in a variable like:
String strDate = "02-01-2013";
then how should I get the day of this date (i.e TUESDAY)?

Use Calendar class from java api.
Calendar calendar = new GregorianCalendar(2008, 01, 01); // Note that Month value is 0-based. e.g., 0 for January.
int reslut = calendar.get(Calendar.DAY_OF_WEEK);
switch (result) {
case Calendar.MONDAY:
System.out.println("It's Monday !");
break;
}
You could also use SimpleDateFormater and Date for parsing dates
Date date = new Date();
SimpleDateFormat date_format = new SimpleDateFormat("yyyy-MM-dd");
try {
date = date_format.parse("2008-01-01");
} catch (ParseException e) {
e.printStackTrace();
}
calendar.setTime(date);

First split the string
String[] out = strDate.split("-");
s1 = Integer.parseInt(out[0]);
s2 = Integer.parseInt(out[1]) - 1;
yr = out[2];
char a, b, c, d;
a = yr.charAt(0);
b = yr.charAt(1);
c = yr.charAt(2);
d = yr.charAt(3);
s3 = Character.getNumericValue(a)*1000 +
Character.getNumericValue(b)*100 +
Character.getNumericValue(c)*10 +
Character.getNumericValue(d);
then create a calendar instance on that day
Calendar cal = Calendar.getInstance();
cal.set(s3, s2, s1);
then get the day
cal.get(Calendar.DAY_OF_WEEK);

use this format for date, day and time.
Date dNow = new Date();
SimpleDateFormat ft = new SimpleDateFormat("E yyyy.MM.dd 'at' hh:mm:ss a zzz");
and get out put of object here with format method.
ft.format(dNow)

I think that based on Android documentation is suggested the use of Calendar,
You need to be careful because the first day 1 is Sunday and the first month January
Also check that you can get DAY_OF_WEEK, DAY_OF_MONTH etc

Date retreival in android

In my application i have 1 edittext box,in this user will enter some date.What i want is i have to get the date of 7th day from the user entered date.I searched in google,i found 1 solution.
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
Calendar cal = Calendar.getInstance();
cal.add("field", +7);
String currentDateandTime = sdf.format(cal.getTime());
In the above cal.add("field",+7)-->Field is int.But my date format is string.So i cant use here..Please help me..

Get date from SimpleDateFormat and add this date object to calender then change into calender. And again get new Updated date from Calender. Wait i will post code
try {
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
Date UserEnterDate = sdf.parse("String from your editbox");
Calendar calendar = Calendar.getInstance();
calendar.setTime(UserEnterDate);
int day = calendar.get(Calendar.DAY_OF_MONTH);
day = day + 7;
calendar.set(Calendar.DAY_OF_MONTH, day);
String newDate = calendar.get(Calendar.DAY_OF_MONTH) + "/"
+ calendar.get(Calendar.MONTH) + "/"
+ calendar.get(Calendar.YEAR);
} catch (Exception e) {
// TODO: handle exception
}

As you said thatyou got the date in string format.
So let me start from there
Suppose the date is:
String dt = "2008-01-05"; // Start date
Then do thhis::
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar c = Calendar.getInstance();
try {
c.setTime(sdf.parse(dt));
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
c.add(Calendar.DATE, 7); // number of days to add
dt = sdf.format(c.getTime());
System.out.println(""+dt);
Hope.this will definitely help you.
Enjoy!!!

I suggest better you use DatePickerDialog in onClick() of EditText
then you will get individual Date Month Year. Then you can set your date
Date+=7

you can get Date Object from a String if you know the format, by your question the format is:
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
Calendar cal = Calendar.getInstance();
cal.add("field", +7);
String currentDateandTime = sdf.format(cal.getTime());
now use this date format to parse a string to get Date object, say:
Date dt=sdf.parse(txtDt.getText().toString());
now Set this date to Calendar Object:
Calendar cal=Calendar.getInstance();
cal.setTime(dt);
now you need to add 7 days to this date, so do as:
cal.add(Calendar.DAY_OF_MONTH, 7);
now you have been added 7 days to the date successfully, now get Date from this Calendar object, by using:
Date dtNew=cal.getTime();
and you can convert it to readable string using:
String strNewDt=sdf.format(dtNew);

You have to write the name of the field you want to modify to the "field" parameter, here#s a link to the calendar reference. The calendar object is not a string, but a whole different creature that youre using. Use its functions to do it.
http://developer.android.com/reference/java/util/Calendar.html
And so you would write
!edit, you actually have to set the calendar using ints and parse your string to match. use the set function from the calendar:
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
Calendar cal = new Calendar;
cal.set(int year, int month, int day, int hourOfDay, int minute)
cal.add(DATE, 7);
String currentDateandTime = sdf.format(cal.getTime());