片段中的findViewById，如何在onCreateView之外获取视图

Question

Simple json parsing, but i can't do it cause whenever I would like build it, it crashes, I think it's because of "findViewById".

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    showDrugs(null);
    return inflater.inflate(R.layout.fragment_first, container, false);
}
private void showDrugs(String search) {
    ListView lvDrugs = (ListView) getView().findViewById(R.id.lvDrugs);
    MyRealm myRealm = new MyRealm(getActivity().getApplicationContext());
    RealmResults<Drug> drugs = myRealm.getDrugs(search);
    DrugListAdapter adapter = new DrugListAdapter(getActivity().getApplicationContext(), drugs);
    lvDrugs.setAdapter(adapter);
}

Answer 1

You cannot call showDrugs() before inflating the view because getView() is null .

Simplest way is to call showDrugs() in onViewCreated() , which is called right after onCreateView() , where you can be sure that getView() isn't null .