java - getSupportFragmentManager() 在 Activity 扩展 fragment 中未定义

Question

我正在尝试在操作栏的选项卡中实现 map 。但要做到这一点，我需要将 FragmentActivity 更改为 Fragment。现在，要实现 google maps v2，我无法获取 map fragment 的 ID。这是我的代码中的代码 fragment :

xml文件:

<fragment
    android:id="@+id/map"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:name="com.google.android.gms.maps.MapFragment" />

</LinearLayout>

java文件:

public class FragmentMap extends FragmentActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
}


public static class MapAct extends Fragment {

static final LatLng MARK = new LatLng(53.558678, 9.9271234);

    private GoogleMap map;
    MapView mMapView;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.addition, container, false);     
        return v;
    }

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

            map = ((SupportMapFragment)getActivity().getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
            map.setMapType(GoogleMap.MAP_TYPE_NORMAL);
            Marker hamburg = map.addMarker(new MarkerOptions().position(MARK));
  }
}

请帮助。我是这个概念的新手。

Answer 1

你需要将 Activity 转换为 FragmentActivity

FragmentActivity activity = (FragmentActivity) getActivity();
map = ((SupportMapFragment)activity.getSupportFragmentManager().findFragmentById(R.id.map)).getMap();