Estou tentando mostrar um MapView dentro de um fragmento (usando a biblioteca de compatibilidade invadida). O seguinte funcionou bem no passado:

fragmentoonCreateView() simplesmente retorna um novoFrameLayout fragmentoonActivityCreated() obtém o MapView da Atividade e o adiciona à sua hierarquia de visualizaçõesonDestroyView() remove o MapView da hierarquia de visualizações

Agora, eu gostaria que o fragmento usasse um layout definido em xml para que eu possa ter outras coisas da interface do usuário. Colocando oMapView elemento @ no arquivo de layout sempre falha, por isso estou fazendo assim:

map_screen_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >


    <FrameLayout
        android:id="@+id/map_container"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >
    </FrameLayout>

</LinearLayout>

MinhasMapScreenActivity mantém o @ reMapView, e o fragmento chamagetMapView(), então não encontro o problema "não posso ter mais de um MapView":

MapScreenActivity.java

public class MapScreenActivity extends FragmentActivity {
    protected Fragment fragment;
    protected MapView mapView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.single_pane_empty);

        if (savedInstanceState == null) {
            fragment = new MapScreenFragment();

            getSupportFragmentManager().beginTransaction().add(R.id.root_container, fragment)
                    .commit();
        }
    }

    public MapView getMapView() {
        if (mapView == null) {
            mapView = new MapView(this, getResources().getString(R.string.maps_api_key));
        }

        return mapView;
    }
}

MapScreenFragment.java

public class MapScreenFragment extends Fragment {
    protected ViewGroup mapContainer;
    protected MapView mapView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle args) {
        View root = inflater.inflate(R.layout.map_screen_fragment, container);
        mapContainer = (ViewGroup) root.findViewById(R.id.map_container);
        return root;
    }

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

        mapView = ((MapScreenActivity) getActivity()).getMapView();
        mapView.setClickable(true);
        mapView.setBuiltInZoomControls(true);

        mapContainer.addView(mapView);

    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        mapContainer.removeView(mapView);
    }   

}

Em teoria, tudo isso deve funcionar da mesma maneira que onew FrameLayout método descrito pela primeira vez. No entanto, sempre recebo isso:

02-24 18:01:28.139: E/AndroidRuntime(502): FATAL EXCEPTION: main
02-24 18:01:28.139: E/AndroidRuntime(502): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mapfragment/com.example.mapfragment.MapScreenActivity}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.os.Handler.dispatchMessage(Handler.java:99)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.os.Looper.loop(Looper.java:130)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.app.ActivityThread.main(ActivityThread.java:3683)
02-24 18:01:28.139: E/AndroidRuntime(502):  at java.lang.reflect.Method.invokeNative(Native Method)
02-24 18:01:28.139: E/AndroidRuntime(502):  at java.lang.reflect.Method.invoke(Method.java:507)
02-24 18:01:28.139: E/AndroidRuntime(502):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-24 18:01:28.139: E/AndroidRuntime(502):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-24 18:01:28.139: E/AndroidRuntime(502):  at dalvik.system.NativeStart.main(Native Method)
02-24 18:01:28.139: E/AndroidRuntime(502): Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.view.ViewGroup.addViewInner(ViewGroup.java:1976)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.view.ViewGroup.addView(ViewGroup.java:1871)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.view.ViewGroup.addView(ViewGroup.java:1828)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.view.ViewGroup.addView(ViewGroup.java:1808)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.support.v4.app.NoSaveStateFrameLayout.wrap(Unknown Source)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.support.v4.app.FragmentManagerImpl.moveToState(Unknown Source)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.support.v4.app.FragmentManagerImpl.moveToState(Unknown Source)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.support.v4.app.BackStackRecord.run(Unknown Source)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.support.v4.app.FragmentManagerImpl.execPendingActions(Unknown Source)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.support.v4.app.FragmentActivity.onStart(Unknown Source)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1129)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.app.Activity.performStart(Activity.java:3791)
02-24 18:01:28.139: E/AndroidRuntime(502):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1620)
02-24 18:01:28.139: E/AndroidRuntime(502):  ... 11 more

Tentei remover oMapView do pai antes de retornar degetMapView(), e isso ainda trava. Realmente não entendo por que essa abordagem não funciona, qualquer ajuda seria apreciad