I'm at the beginning of programming android apps and I got this error while I try to implement Google Maps into a fragment. I surfed the web and I saw that is a really common problem but I saw also that all other solutions do not work in my case. I paste below the portion of code with all the imports:
public class GeolocalizzazioneFragment extends Fragment {
private final LatLng CENTER_POINT = new LatLng(44.22625, 12.06861);
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_geolocalizzazione, container, false );
//super.onCreateView(savedInstanceState);
//setContentView(R.layout.activity_main);
//ottieni il controllo del fragment su cui caricare la mappa
GoogleMap map = ((MapSupportFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
//centra la mappa su CENTER_POINT, con zoom 5
//map.moveCamera(CameraUpdateFactory.newLatLngZoom(CENTER_POINT, 5));
//centra la mappa sulla posizione del device
map.setMyLocationEnabled(true);
//animazione dello zoom sulla nostra animazione all'apertura
//Parametri: livello di zoom=10; durata animazione = 1000 millisecondi (1 sec)
map.animateCamera(CameraUpdateFactory.zoomTo(10), 1000, null);
try{
URL url = new URL("### url where I get xml with location marker datas ###"); //prendo l'URL del file XML dal quale prendo i dati dei POI
URLConnection conn = url.openConnection(); //instauro la connessione col file XML
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
org.w3c.dom.Document doc = builder.parse(conn.getInputStream());
NodeList nodes = doc.getElementsByTagName("marker");
for (int i=0; i<nodes.getLength(); i++)
{
Element item = (Element) nodes.item(i);
String name = item.getAttribute("name");
String address = item.getAttribute("address");
String stringLat = item.getAttribute("lat");
String stringLong = item.getAttribute("long");
String icon = item.getAttribute("icon"); //assigned variable for the XML icon attribute
Double lat = Double.valueOf(stringLat);
Double lon = Double.valueOf(stringLong);
// map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
// map.setMyLocationEnabled(true);
map.addMarker(new MarkerOptions()
.position(new LatLng(lat,lon))
.title(name)
.snippet(address)
);
}
}catch (Exception e){
e.printStackTrace();
}
return super.onCreateView(inflater, container, savedInstanceState);
}
}
I also checked that in "Java Build Path" window "Android private libraries" are correctly checked and as you can see I already imported "com.google.android.gms.maps.SupportMapFragment;" and I also imported the "google-play-services.jar" library. And my error is at the line below:
GoogleMap map = ((MapSupportFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
If you need other portions of code, just ask and I will paste :)
P.S.: My IDE is Eclipse.
