Android:Fragment！isDetached()和iwego()有什么区别? [英] Android: what is the difference between Fragment !isDetached() and isAdded()?

问题描述

在我的Fragment中，一旦要加载一些数据，我想做一个Toast，像这样:

In my Fragment, I want to make a Toast once some data is loaded, like this:

Toast.makeText(getActivity(), R.string.toast_loading_done,
        Toast.LENGTH_SHORT).show();

仅当Fragment仍附加到Activity时才有意义，即Fragment是可见的，并且getActivity()不会返回null.

This only makes sense if the Fragment is still attached to the Activity, i.e. the Fragment is visible and getActivity() will not return null.

我可以使用！isDetached()或 i☎联系人()进行检查，对吗?在这里，我想知道两种方法之间的区别是什么，我最好使用哪种方法?

I could check that with !isDetached() or with isAdded(), right? Here I am wondering what the difference between the two methods is and which one I should preferably use?

推荐答案

Fragment 可以附加到 Activity ，而无需添加到其视图层次结构中.

A Fragment can be attached to an Activity without being added to it's view hierarchy.

如果 Fragment 被分离，则其状态得以维护并且可以重新添加.

If a Fragment is detached, it's state is maintained and can be re-added.

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