让您的 Fragment 扩展ListFragment而不是 .Fragment如果您已经使用或查看了示例,ListActivity则不再需要将此片段与 xml 布局文件相关联setContentView(layout),Android 会在其中创建一个现成Fragment的,以方便您使用。而不是像这样的ListView方便方法setListAdapter(adapter)可供您使用。但是,如果您想访问ListView实例,请使用.The getListView()Fragment 似乎用于onActivityCreated执行此操作:
我猜你对片段的了解足以理解你this的.ListActivitygetActivity()ListFragment
这是我在Android 片段文档中找到的代码:
 public static class TitlesFragment extends ListFragment {
boolean mDualPane;
int mCurCheckPosition = 0;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    // Populate list with our static array of titles.
    setListAdapter(new ArrayAdapter<String>(getActivity(),
            android.R.layout.simple_list_item_activated_1, Shakespeare.TITLES));
    // Check to see if we have a frame in which to embed the details
    // fragment directly in the containing UI.
    View detailsFrame = getActivity().findViewById(R.id.details);
    mDualPane = detailsFrame != null && detailsFrame.getVisibility() == View.VISIBLE;
    if (savedInstanceState != null) {
        // Restore last state for checked position.
        mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);
    }
    if (mDualPane) {
        // In dual-pane mode, the list view highlights the selected item.
        getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        // Make sure our UI is in the correct state.
        showDetails(mCurCheckPosition);
    }
}
@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putInt("curChoice", mCurCheckPosition);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
    showDetails(position);
}
/**
 * Helper function to show the details of a selected item, either by
 * displaying a fragment in-place in the current UI, or starting a
 * whole new activity in which it is displayed.
 */
void showDetails(int index) {
    mCurCheckPosition = index;
    if (mDualPane) {
        // We can display everything in-place with fragments, so update
        // the list to highlight the selected item and show the data.
        getListView().setItemChecked(index, true);
        // Check what fragment is currently shown, replace if needed.
        DetailsFragment details = (DetailsFragment)
                getFragmentManager().findFragmentById(R.id.details);
        if (details == null || details.getShownIndex() != index) {
            // Make new fragment to show this selection.
            details = DetailsFragment.newInstance(index);
            // Execute a transaction, replacing any existing fragment
            // with this one inside the frame.
            FragmentTransaction ft = getFragmentManager().beginTransaction();
            if (index == 0) {
                ft.replace(R.id.details, details);
            } else {
                ft.replace(R.id.a_item, details);
            }
            ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
            ft.commit();
        }
    } else {
        // Otherwise we need to launch a new activity to display
        // the dialog fragment with selected text.
        Intent intent = new Intent();
        intent.setClass(getActivity(), DetailsActivity.class);
        intent.putExtra("index", index);
        startActivity(intent);
    }
}
}    
您还可以使用 和 之类的方法setEmptyText来setListShown显示一条消息,以防您的光标没有行并分别切换您的 listView 的可见性。此外,Android 的 Loader Framework 仅支持 Fragment 而不是支持库中的 Activity。