fragment replace (for AndroidAdventCalendar2012)

ContactListFragment.java

public class ContactListFragment extends ListFragment {

    public static ContactListFragment newInstance() {
        return new ContactListFragment();
    }

    private ArrayAdapter<ContactData> adapter;
    private DataAccessor accessor;

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        accessor = (DataAccessor) getActivity();

        // リスト表示
        adapter = new ArrayAdapter<ContactData>(getActivity(), android.R.layout.simple_list_item_1);
        adapter.addAll(accessor.getDataList());
        setListAdapter(adapter);

        // 詳細表示(2pane時のみ)
        if (ScreenUtil.hasMultiPane(getActivity())) {
            Fragment fragment = getFragmentManager().findFragmentByTag(FragmentType.DETAIL.getTag());
            if (fragment == null) {
                int selectedPosition = accessor.getSelectedPosition();
                fragment = ContactDetailFragment.newInstance(selectedPosition);
            }
            FragmentTransaction ft = getFragmentManager().beginTransaction();
            ft.replace(R.id.container_contact_detail, fragment, FragmentType.DETAIL.getTag());
            ft.commit();
        }
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        // 選択位置保持
        accessor.setSelectedPosition(position);

        // 詳細表示
        int replaceContainerId = 0;
        if (ScreenUtil.hasMultiPane(getActivity())) {
            replaceContainerId = R.id.container_contact_detail;
        } else {
            replaceContainerId = android.R.id.content;
        }
        Fragment fragment = ContactDetailFragment.newInstance(position);
        FragmentTransaction ft = getFragmentManager().beginTransaction();
        ft.replace(replaceContainerId, fragment, FragmentType.DETAIL.getTag());
        ft.addToBackStack(null);
        ft.commit();
    }
}