support.v4.ListFragment shows data in Android 3.0 but not in 2.3.3

Question

Why does the simple code below work in Android 3.0, but not in 2.3.3 ???
In 2.3.3, it shows only a blank screen.

There is no message in LogCat.
Any help would be appreciated.

import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.widget.ArrayAdapter;

public class TestListFragment extends ListFragment {

    private ArrayAdapter<String> myAdapter;

    private String[] data = {"One", "Two", "Three"};

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

        myAdapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, data);

        setListAdapter(myAdapter);
    }
}

Regards,

** EDIT

I found the cause. If the activity extends FragmentActivity, the code above works in 2.3.3, but if it extends ActionBarActivity it does not work.

Does someone know how to solve it ?

Answer 1

I think the workaround is jus not use the default android.R.id.content to show the fragment.
I just do this:
In the onCreate() of your activity(extends ActionBarActivity):

setContentView(R.layout.whocares); getSupportFragmentManager().beginTransaction().add(R.id.the_root_view,yourFragment).commit();