android.app.Fragment 和 android.support.v4.app.Fragment 的区别 [英] Difference between android.app.Fragment and android.support.v4.app.Fragment

问题描述

android.app.Fragment 和 android.support.v4.app.Fragment 有什么区别，分别应该在什么情况下使用?

What is the difference between android.app.Fragment and android.support.v4.app.Fragment, and what are the circumstances in which each should be used?

推荐答案

android.support.v4.app.Fragment 是 Fragment 类，这是一个兼容包，允许您在Android 上使用一些较新的功能旧版本的 Android.

android.support.v4.app.Fragment is the Fragment class in the android support library, which is a compatibility package that allows you to use some of the newer features of Android on older versions of Android.

android.app.Fragment 是 Fragment 类.它是在 Android 3 (API 11) 中引入的.

android.app.Fragment is the Fragment class in the native version of the Android SDK. It was introduced in Android 3 (API 11).

如果您想让您的应用使用 Fragment，并希望针对 API 11 之前的设备，您必须使用 android.support.v4.app.Fragment.但是，如果您只针对运行 API 11 或更高版本的设备，则可以使用 android.app.Fragment.

If you want to make your app use fragments, and want to target devices before API 11, you must use android.support.v4.app.Fragment. However, if you're only targeting devices running API 11 or above, you can use android.app.Fragment.

操作系统包含的 android.app.Fragment 现已弃用(从 API 级别 28 开始)，每个人都应该转而使用支持库实现.

the OS-contained android.app.Fragment is now deprecated (as of API level 28), and everyone should move to using the support library implementations.

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