다중 프레그먼트 생성 시 구글 맵이 안 보여요

Question

public static class Mainfragment extends Fragment implements OnClickListener, OnDateSetListener, OnTimeSetListener {

    int actionTabIndex;
    int layout;
    LatLng position;

    GoogleMap googleMap;
    Marker mkPumps;
    LatLng pumpPos;
    Marker[] markers;


    static View v;

    int buttonId;
public static Mainfragment makeObject(int actionTabIndex) {
        Mainfragment bf = new Mainfragment();
        bf.actionTabIndex = actionTabIndex;

        return bf;
    }

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle saveInstanceState) {

        switch (actionTabIndex) {
            case 0: layout = R.layout.framemap;     break;
            case 1: layout = R.layout.pmd;          break;
            case 2: layout = R.layout.maintenance;  break;
            case 3: layout = R.layout.report;       break;
            case 4: layout = R.layout.setting;      break;
        }

        try{
            v = inflater.inflate(layout, container, false);
        }
        catch (InflateException e) {
        }

        if (actionTabIndex == 0) initMap(); // GoogleMap

        else if (actionTabIndex == 2) { // Maintenance

        }
        else if (actionTabIndex == 3) { // Report

        }

        return v;
    }

    private void initMap() {
        try {
            GooglePlayServicesUtil.isGooglePlayServicesAvailable(getActivity());
            googleMap = ((MapFragment)getFragmentManager().findFragmentById(R.id.googleMap)).getMap();

            Pos = new LatLng(35.470707,128.65134);

            googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(pumpPos, 15));

            MarkerOptions moOption = new MarkerOptions();

            moOption.position(Pos);
            moOption.title("#1");
            mkPumps = googleMap.addMarker(moOption);
            mkPumps.showInfoWindow();

        catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }


    @Override
    public void onDestroy() {
        super.onDestroyView();
            ViewGroup parent = (ViewGroup)v.getParent();
            if(parent!=null){
                parent.removeView(v);
            }
        }
    }

앱을 실행하면 처음엔 구글 맵의 프레그먼트가 생성됩니다.

 

액션바를 클릭할 때마다 같은 프레그먼트, 다른 레이아웃 ->  프레임레이아웃에 생성됩니다.

 

다른 탭들은 모두 실행이 잘 되는데 다시 구글맵을 띄우면 보이지가 않네요 ㅜ