如何在Android中减去两个日历对象

Question

比方说,我有两个日历对象,格式为"MM/dd/yyyy".如何减去它们并返回天数？例如,"9/7/2014" - "9/1/2014"并返回7.

Calendar calendar = Calendar.getInstance();
Calendar today = Calendar.getInstance();

Answer 1

你可以尝试这样:

Calendar calendar = Calendar.getInstance();
  calendar.set(Calendar.DAY_OF_MONTH,7);
  calendar.set(Calendar.MONTH,8); 
  calendar.set(Calendar.YEAR, 2014);

  Calendar today = Calendar.getInstance();

  long difference = today.getTimeInMillis() - calendar.getTimeInMillis();
  int days = (int) (difference/ (1000*60*60*24));