Now that my Activity is just a wrapper around a Fragment that does the same work, how do I get that bundle to the Fragment if I declare the fragment in XML with the tag?
You can’t.
However, you are welcome to call findFragmentById()
on your FragmentManager
to retrieve the fragment post-inflation, then call some method on the fragment to associate data with it. While apparently that cannot be setArguments()
, your fragment could arrange to hold onto the data itself past a configuration change by some other means (onSaveInstanceState()
, setRetainInstance(true)
, etc.).