android - Activity.isFinishing() 的 fragment 等价物是什么？

Question

在我的 Activity 中，我经常使用这个成语:

@Override
public void onDestroy() {
    super.onDestroy();
    if (isFinishing() != true) return;
    // do some final cleanup since we're going away for good
}

Fragment 有一个 onDestroy() 方法，但是 isFinishing() 的等价物是什么？我应该从 fragment 的 onDestroy() 中检查 getActivity().isFinishing() 吗？

编辑添加:

这是我在各种情况下得到的回调(按顺序)，以及 getActivity() 是否返回 null 或非 null，如果非 null，则返回 getActivity 的值().isFinishing():

场景 #1:DialogFragment 正在显示并且用户点击返回按钮(即需要释放引用):

onDismiss(): activity = non-null, finishing = false
onDestroy(): activity = non-null, finishing = false

场景 #2:DialogFragment 正在显示并且父 Activity 完成(即需要释放引用):

onDestroy(): activity = non-null, finishing = true
onDismiss(): activity = null, finishing = n/a

场景 #3:DialogFragment 正在显示，操作系统暂时破坏父 Activity (即不应释放引用):

onDestroy(): activity = non-null, finishing = false
onDismiss(): activity = null, finishing = n/a

Answer 1

fragment 有一个名为 isRemoving() 的方法当从 Activity 中移除 fragment 时，这是真的:

Return true if this fragment is currently being removed from its activity. This is not whether its activity is finishing, but rather whether it is in the process of being removed from its activity.