How can I recreate a fragment?

Question

I'm using a widget called SwipeRefreshLayout, to refresh my fragment when someone pushes the view.

To recreate the activity I have to use:

SwipeRefreshLayout mSwipeRefreshLayout;

public static LobbyFragment newInstance() {
    return new LobbyFragment();
}


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    final View view = inflater.inflate(R.layout.fragment_lobby, container, false);


    receiver = new MySQLReceiver();

    rlLoading = (RelativeLayout) view.findViewById(R.id.rlLoading);
    gvLobby = (GridView) view.findViewById(R.id.gvLobby);

    updateList();

    mSwipeRefreshLayout = (SwipeRefreshLayout) view.findViewById(R.id.mSwipeRefreshLayout);
    mSwipeRefreshLayout.setColorSchemeResources(R.color.pDarkGreen, R.color.pDarskSlowGreen, R.color.pLightGreen, R.color.pFullLightGreen);
    mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
        @Override
        public void onRefresh() {

            getActivity().recreate();
        }


    });


    return view;

}

But I don't want to recreate the full activity that contains the view pager, I would like to recreate the fragment. How can I do that?

Answer 1

I'm using .detach() and .attach() for recreating the fragment.

ATTACH

Re-attach a fragment after it had previously been deatched from the UI with detach(Fragment). This causes its view hierarchy to be re-created, attached to the UI, and displayed.

DETACH

Detach the given fragment from the UI. This is the same state as when it is put on the back stack: the fragment is removed from the UI, however its state is still being actively managed by the fragment manager. When going into this state its view hierarchy is destroyed.

HOW I USE IT

getFragmentManager()         .beginTransaction()         .detach(LobbyFragment.this)         .attach(LobbyFragment.this)         .commit(); 

Answer 2

You can use :

getSupportFragmentManager().beginTransaction()
                .replace(R.id.container, LobbyFragment.newInstance()).commit();

To recreate your fragment

Note:getSupportFragmentManager() is if you are using support fragment and AppCompatActivity , if you are using framework fragment class you need to use getFragmentManager()

Answer 3

If you're using Navigation Component, you can use this:

findNavController().navigate(
    R.id.current_dest,
    arguments,
    NavOptions.Builder()
        .setPopUpTo(R.id.current_dest, true)
        .build()
)

This lets NavController pop up the current fragment and then navigate to itself. You get a new Fragment and fragment ViewModel also gets recreated.