我工作的片段，并遇到了两件事活动和 FragmentActivity 这是多次使用。我想知道，有没有这两者之间有什么区别，因为当我改变了活动与 FragmentActivity ，它没有在应用效果。

I was working on fragments and came across two things Activity and FragmentActivity which are used several times. I want to know that is there any difference between these two, because when I changed Activity with FragmentActivity, it had no effect on the app.

推荐答案

A FragmentActivity 是活动的一个子类这是专为在 Android的支持包。

A FragmentActivity is a subclass of Activity that was built for the Android Support Package.

在 FragmentActivity 类增加了一些新的方法，以确保与旧版本的Andr​​oid的兼容性，但除此之外，真的没有多少两者之间的区别。只要确保你改变所有呼叫 getLoaderManager（）和 getFragmentManager（）到 getSupportLoaderManager（ ）和 getSupportFragmentManager（）分别的。

The FragmentActivity class adds a couple new methods to ensure compatibility with older versions of Android, but other than that, there really isn't much of a difference between the two. Just make sure you change all calls to getLoaderManager() and getFragmentManager() to getSupportLoaderManager() and getSupportFragmentManager() respectively.