Java时间差

DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
Date d1 = df.parse("2016-05-01 13:22:35"));
Date d2 = new Date(System.currentTimeMillis());// 你也可以获取当前时间
long diff = d2.getTime() - d1.getTime();// 这样得到的差值是微秒级别
long days = diff / (1000 * 60 * 60 * 24);
long hours = (diff - days * (1000 * 60 * 60 * 24))
/ (1000 * 60 * 60);
long minutes = (diff - days * (1000 * 60 * 60 * 24) - hours
* (1000 * 60 * 60))
/ (1000 * 60);
if (days > 0) {
holder.tv_time.setText(days + "天前");
} else if (hours > 0) {
holder.tv_time.setText(hours + "小时前");
} else if (minutes >= 0) {
holder.tv_time.setText(hours + "分钟前");
}
} catch (Exception e) {
e.printStackTrace();
}