public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.lecturers_fragment,
            container, false);
    ListView list = (ListView) rootView.findViewById(R.id.lecturersList);
    final List<Lecturer> allLecturersList = LecturerDatabaseHelper
            .getAllLecturers(getActivity());
    if (allLecturersList != null) {
        LecturerItemAdapter lecturerAdapter = new LecturerItemAdapter(
                mCurrentActivity, allLecturersList);
        list.setAdapter(lecturerAdapter);
    }
    list.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> adapterView, View view,
                int index, long id) {

            Lecturer lecturer = allLecturersList.get(index);
            L.i("Boulder name  is playing link it contains"
                    + lecturer.getName());

            Intent intent_lecturer = new Intent(mCurrentActivity,
                    LecturerFragment.class);
            intent_lecturer.putExtra(LecturerFragment.SELECTED_LECTURER,
                    lecturer);
            mCurrentActivity.startActivity(intent_lecturer);
        }
    });
    return rootView;
}

03-25 22:04:36.092: E/AndroidRuntime(12453): Caused by: java.lang.ClassCastException: com.asi.sesjaapp.view.LecturerFragment cannot be cast to android.app.Activity

Intent intent_lecturer = new Intent(getActivity(), YourActivity.class);
            intent_lecturer.putExtra(LecturerFragment.SELECTED_LECTURER, lecturer);
            mCurrentActivity.startActivity(intent_lecturer);

new Intent(getActivity() , LecturerFragment.class);