android.support.v4.util.Pair与android.util.Pair [英] android.support.v4.util.Pair vs android.util.Pair

问题描述

我阅读了有关support.v4 lib的信息，该文件允许android向后兼容.

I read about support.v4 lib that allows android backward compatibility.

因此，IIUC在存在歧义的情况下-始终最佳做法是从android.support.v4 ...

So IIUC, when there is an ambiguity - it's always best practice to import the lib from android.support.v4 ...

对吗?

推荐答案

是的，这很明智，但并非总是需要.

Yeah, it's wise but not always needed.

在这种情况下，Pair是API 5和非常有用的类，因此将其添加到v4库中.

I this case Pair is API 5 and quite usefull class so it was added to v4library.

另一个例子是Fragments.如果您想将ViewPager与Fragments一起使用，则很可能需要v4中的Fragments，因为ViewPager也来自v4.

Another example are Fragments. If you want to use ViewPager with Fragments most probably you need Fragments from v4 as ViewPager is from v4 as well...

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