Java Android：如何获取/将 long 转换为 int？
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Android: How to get/convert long to int?
提问by dudzio
Calendar c = Calendar.getInstance();
long diff = c.getTimeInMillis() - DateSaved.getTimeInMillis(); //result in millis
long daysDiff = (diff / (24 * 60 * 60 * 1000));
Everything works fine, when i print diff (integer number of days)...
一切正常，当我打印差异（天数）...
The problem starts here:
问题从这里开始：
int daysDiffINT = (int) daysDiff;
int daysRemaining = (sumaINT/dailyINT) - daysDiffINT;
i need to proceed my long diff with some int values.
我需要用一些 int 值来处理我的长差异。
This above doesn't work.The console gives me an error: "Invalid int" I searched a little bit, there are thousands of converting String to Int etc.
上面的这不起作用。控制台给了我一个错误：“Invalid int”我搜索了一下，有数千个将 String 转换为 Int 等。
But how can I get int from long? Or String from long?
但是我怎样才能从 long 中得到 int 呢？还是从长字符串？
It's driving me crazy :(
这让我疯狂 ：（
// BIG Thanks for all of you - you've learned me how to make my own app :)
// 非常感谢你们所有人 - 你们已经学会了如何制作我自己的应用程序 :)
采纳答案by Piotr ?lesarew
long to int:
长到整数：
public static int safeLongToInt(long l) {
if (l < Integer.MIN_VALUE || l > Integer.MAX_VALUE) {
throw new IllegalArgumentException
(l + " cannot be cast to int without changing its value.");
}
return (int) l;
}
long to String:
长到字符串：
public static String longToString(long l) {
return String.valueOf(l);
}
