如何在android studio中比较或计算两个日期的差异,android,date,compareto,Android,Date,Compareto,我已经试过在android studio中比较两次约会，就像这样 String dtThen = "13-10-2013"; Date dateThen = formatter.parse(dtThen); String dtNow = "15-10-2013"; Date dateNow = formatter.parse(dtNow); if (dateThen.compareTo(dateNow)==0)