Change Activity Class To Fragment

I'm pretty new new Android development. I have a class that extends Activity and I'd like to change to to a Fragment. I know as a fragment it would use onCreateView(LayoutInflater,

Solution 1:

First change this.

View rootView = inflater.inflate(R.layout.fragment_actionalerts, null);

to

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

And use Fragment Context as a getActivity().

Solution 2:

Try this:

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    super.onCreateView(inflater, container, savedInstanceState);
    View view = inflater.inflate(R.layout.fragment_submenus_list, null);
....
    return view;
}

And change every findViewById(...) to view.findViewById(...)