Kalpana Devkota Kalpana Devkota - 3 months ago 20
Java Question

Method doesnot override method from it's super class

I just copied this code from somewhere put when I tried to run it says method doesnot override method from it's super class. I am a newbie to java inheritance. Please help me understand this. How can I solve this? This error is shown for last two @override methods.

public class MapViewFragment extends Fragment implements OnMapReadyCallback {


private Button btnFindPath;
private EditText etOrigin;
private EditText etDestination;
private ProgressDialog progressDialog;

private List<Marker> originMarkers = new ArrayList<>();
private List<Marker> destinationMarkers = new ArrayList<>();
private List<Polyline> polylinePaths = new ArrayList<>();


GoogleMap mGoogleMap;
MapView mMapView;
View mView;




public MapViewFragment() {
// Required empty public constructor
}

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

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
mView = inflater.inflate(R.layout.fragment_map_view, container, false);

btnFindPath = (Button) getView().findViewById(R.id.btnFindPath);
etOrigin = (EditText) getView().findViewById(R.id.etOrigin);
etDestination = (EditText) getView().findViewById(R.id.etDestination);

btnFindPath.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendRequest();
}
});

return mView;
}

private void sendRequest() {
String origin = etOrigin.getText().toString();
String destination = etDestination.getText().toString();
if (origin.isEmpty()) {
Toast.makeText(getActivity(), "Please enter origin address!", Toast.LENGTH_SHORT).show();
return;
}
if (destination.isEmpty()) {
Toast.makeText(getActivity(), "Please enter destination address!", Toast.LENGTH_SHORT).show();
return;
}

try {
new DirectionFinder(getActivity(), origin, destination).execute();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}



@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);

mMapView = (MapView) mView.findViewById(R.id.map);
if (mMapView != null){
mMapView.onCreate(null);
mMapView.onResume();
mMapView.getMapAsync(this);

}
}

@Override
public void onMapReady(GoogleMap googleMap) {
MapsInitializer.initialize(this.getActivity());
mGoogleMap = googleMap;
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
googleMap.addMarker(new MarkerOptions().position(new LatLng(27.717245, 85.323960)).title("Yo ho Kathmandu University") .snippet("I study Here"));
CameraPosition Liberty = CameraPosition.builder().target(new LatLng(27.717245, 85.323960)).zoom(16).bearing(0).tilt(45).build();
googleMap.moveCamera(CameraUpdateFactory.newCameraPosition(Liberty));

googleMap.setMyLocationEnabled(true);


}


@Override
public void onDirectionFinderStart() {
progressDialog = ProgressDialog.show(getActivity(), "Please wait.",
"Finding direction..!", true);

if (originMarkers != null) {
for (Marker marker : originMarkers) {
marker.remove();
}
}

if (destinationMarkers != null) {
for (Marker marker : destinationMarkers) {
marker.remove();
}
}

if (polylinePaths != null) {
for (Polyline polyline:polylinePaths ) {
polyline.remove();
}
}
}

@Override
public void onDirectionFinderSuccess(List<Route> routes) {
progressDialog.dismiss();
polylinePaths = new ArrayList<>();
originMarkers = new ArrayList<>();
destinationMarkers = new ArrayList<>();

for (Route route : routes) {
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(route.startLocation, 16));
((TextView) getView().findViewById(R.id.tvDuration)).setText(route.duration.text);
((TextView) getView().findViewById(R.id.tvDistance)).setText(route.distance.text);

originMarkers.add(mGoogleMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_media_pause))
.title(route.startAddress)
.position(route.startLocation)));
destinationMarkers.add(mGoogleMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromResource(R.drawable.ic_media_play))
.title(route.endAddress)
.position(route.endLocation)));

PolylineOptions polylineOptions = new PolylineOptions().
geodesic(true).
color(Color.BLUE).
width(10);

for (int i = 0; i < route.points.size(); i++)
polylineOptions.add(route.points.get(i));

polylinePaths.add(mGoogleMap.addPolyline(polylineOptions));
}
}
}

Answer Source

You are missing "DirectionFinderListener" interface:

public class MapViewFragment extends Fragment implements OnMapReadyCallback, DirectionFinderListener 

Don't forget to add all the classes from Google map direction sample app: https://github.com/hiepxuan2008/GoogleMapDirectionSimple/tree/master/app/src/main/java/Modules