FragmentActivity和Activity之间有什么区别？

Question

我已经在片段活动的基本代码替换活动中使用它，但我没有任何错误。应用程序已经工作。

Answer 1

As seen in the documentation:

FragmentActivity

Base class for activities that want to use the support-based Fragment and Loader APIs.

Activity

An activity is a single, focused thing that the user can do. Almost all activities interact with the user, so the Activity class takes care of creating a window for you in which you can place your UI with setContentView(View). While activities are often presented to the user as full-screen windows, they can also be used in other ways: as floating windows (via a theme with windowIsFloating set) or embedded inside of another activity (using ActivityGroup)

Can see more at : http://developer.android.com/reference/android/support/v4/app/FragmentActivity.html

Answer 2

A fragment activity can contain fragments (as it's name implies). It's the support version of activities for older APIs, which want to use fragments.

Answer 3

A Fragment , introduced in Android 3.0 HoneyComb is a portion of a user interface inside an activity. You can have many fragments in you UI.

FragmentActivity is the base class you must extend in order to use fragments with the support library.

Answer 4

The nuance here is that an Activity can use Fragment s from the native SDK (as long as you are targeting API 11+), while a FragmentActivity can use Fragment s from the support library.

So, assuming API 11+, if you are using android.app.Fragment s in your app, you can use Activity , but if you are using android.support.v4.app.Fragment s in your app, then you must use FragmentActivity .