如何在Android中减去两个日历对象

例如，假设我有两个格式为“MM/dd/yyyy”的日历对象。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();

您可以这样尝试：

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));

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谢谢这正是我要找的！