Get the last x day from a string in android (e.g. 20140310 , last 2 day , return 20140308)

Question

How can serve a string as a date and reduce 2 day, after that return the result as an string ?

Just similar to the title example? Thanks

This is some related code but it seems deduct from current date and not output as a string like e.g. 20140308, thanks

Calendar calendar = Calendar.getInstance(); 
calendar.add(Calendar.DATE, -2);

Hope you have get him idea from the following link: http://stackoverflow.com/questions/21473696/android-display-date-from-one-week-to-another-like-thursday-to-thursday — Farhan Shah, Mar 10 '14 at 12:17

Juan Cortés · Answer 1 · 2014-03-10T12:14:30.777

You first need to parse the date from the String into a Date something like this:

Date date = new SimpleDateFormat("yyyyMMdd").parse("YOUR DATE STRING");

Then set the time from that date, to the Calendar instance:

Calendar c = Calendar.getInstance();
c.setTime(date);

At this point, calendar's date is the one you had in your string, and you can deduct 2 days or whatever you want from that date and not today

c.add(Calendar.DATE, -2);

score 0 · Accepted Answer · answered Mar 10 '14 at 08:55

You can use SimpleDateFormat to parse your String as a Date based on the pattern of your choice - in your case it is yyyyMMdd.

Then you can perform operations on that date which you want to re-format as a String based on your pattern.

SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd"); //Set SimpleDateFormat per your pattern
    String dateStr = "20140310"; // Your Date as String
    Calendar cal = Calendar.getInstance();
    cal.setTime(sdf.parse(dateStr)); // Set the date to Calendar instance
    cal.add(Calendar.DATE, -2); // Perform Operation

    System.out.println(sdf.format(cal.getTime())); //20140308

Get the last x day from a string in android (e.g. 20140310 , last 2 day , return 20140308)

2 Answers2