java - Android get date before 7 days (one week) - Stack Overflow

java - Android get date before 7 days (one week) - Stack Overflow

Parse the date:

Date myDate = dateFormat.parse(dateString); 

And then either figure out how many milliseconds you need to subtract:

Date newDate = new Date(myDate.getTime() - 604800000L); // 7 * 24 * 60 * 60 * 1000 

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);