在 Android 中比较日期的最佳方法 [英] Best way to compare dates in Android

问题描述

我正在尝试将字符串格式的日期与当前日期进行比较.这就是我所做的(尚未测试，但应该可以工作)，但我使用的是不推荐使用的方法.有什么好的替代方案吗?谢谢.

I am trying to compare a date in a String format to the current date. This is how I did it (haven't tested, but should work), but am using deprecated methods. Any good suggestion for an alternative? Thanks.

附言我真的很讨厌用 Java 做 Date 的东西.有很多方法可以做同样的事情，你真的不确定哪一种是正确的，因此我的问题在这里.

P.S. I really hate doing Date stuff in Java. There are so many ways to do the same thing, that you really aren't sure which one is the correct one, hence my question here.

String valid_until = "1/1/1990";

Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("dd/mm/yyyy");
Date strDate = sdf.parse(valid_until);

int year = strDate.getYear(); // this is deprecated
int month = strDate.getMonth() // this is deprecated
int day = strDate.getDay(); // this is deprecated       

Calendar validDate = Calendar.getInstance();
validDate.set(year, month, day);

Calendar currentDate = Calendar.getInstance();

if (currentDate.after(validDate)) {
    catalog_outdated = 1;
}

推荐答案

你的代码可以减少到

SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
Date strDate = sdf.parse(valid_until);
if (new Date().after(strDate)) {
    catalog_outdated = 1;
}

或

SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
Date strDate = sdf.parse(valid_until);
if (System.currentTimeMillis() > strDate.getTime()) {
    catalog_outdated = 1;
}

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