android - 在 Android 的 Fragment 中显示数据

Question

我正在尝试显示来自 SQLite 的数据并将其显示在 fragment 的 ListView 中。这是我的代码，当我运行它时，它会自动关闭。此代码在我的主要 Activity 中

    public static class ListDoctorFragment extends Fragment {

    ListView list;
    DataDB data = new DataDB();

    ArrayAdapter<String> listAdapter;

    public ListDoctorFragment() {
    }
        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

            final View view = inflater.inflate(R.layout.listdoctor, container, false);

            ArrayList<String> names = new ArrayList<String>();
            try {
                names = data.getDoctorlistDB(getActivity());
            } catch (SQLException e) {
                e.printStackTrace();
            }

            listAdapter = new ArrayAdapter<String>(getActivity(), R.layout.support_simple_spinner_dropdown_item, names);

            // set the adapter
            list.setAdapter(listAdapter);

            return view;
        }
    }

Answer 1

您的“ListView 列表”未初始化。它必须是这样的:

list = (ListView) view.findViewById(R.id.listview);