RecyclerView adapter does not work in fragment but works in activity

I’ve been using activity and firebase-ui in order to populate RecyclerView with data from Realtime Database. It works well in activity like this:

        @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.fragment_transactions);
        list = (RecyclerView) findViewById(R.id.list);
        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        list.setLayoutManager(layoutManager);
        list.setAdapter(new TransactionsAdapter(
                DataManager.getTransactionsRef().orderByChild("date")
        ));
    }

but then I moved this code to fragment with the same layout:

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
        list.setLayoutManager(layoutManager);
        list.setAdapter(new TransactionsAdapter(
                DataManager.getTransactionsRef().orderByChild("date")
        ));
    }

and it does not show any data. Currently I have both Activity and Fragment and it works in activity but it doesn’t in Fragment.

Here is my dependencies:

    compile 'com.google.firebase:firebase-core:10.2.1'
    compile 'com.google.firebase:firebase-database:10.2.1'
    compile 'com.google.firebase:firebase-auth:10.2.1'
    compile 'com.firebaseui:firebase-ui-auth:1.2.0'
    compile 'com.firebaseui:firebase-ui-database:1.2.0'
    compile 'com.android.support:design:25.3.1'

[folk113]

舅服你

[SUPERCILEX]

@semenoh This question would be better for Stack Overflow, but I’ll give you some clues here anyway.

Ok, so you know how in your AppCompatActivity you use setContentView(R.layout.something)? Well, in Fragments you have to deal with that stuff yourself. I would recommend Ctrl + Bing the super.onViewCreated(view, savedInstanceState); to see what it does. If you do that, you’ll see that it returns null and does nothing:

@Nullable
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    return null;
}

TLDR: you have to manually inflate your layout like so:

View rootView = inflater.inflate(R.layout.something, container, false);

// ...
rootView.findViewById(R.id.recycler_view).setAdapter(...)

return rootView;

Hope this helps! 😄