Como adicionar marcador no Google maps android?
Editar: eu recebo um marcador quando eu clicar agora com o seguinte código. Ele só me dá uma exceção de tempo de execução (exceção de NullPointer) quando eu clicar no mapa da segunda vez:
public class MapViewFragment extends Fragment {
MapView mMapView;
private GoogleMap googleMap;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_map_view, container, false);
mMapView = (MapView) rootView.findViewById(R.id.mapView);
mMapView.onCreate(savedInstanceState);
mMapView.onResume();
Context context = getActivity().getApplicationContext();
final LocationsDB locationsDB = new LocationsDB(context);
try {
MapsInitializer.initialize(getActivity().getApplicationContext());
} catch (Exception e) {
e.printStackTrace();
}
mMapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(GoogleMap mMap) {
googleMap = mMap;
googleMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
public void onMapClick(LatLng point) {
// Drawing marker on the map
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(point);
markerOptions.title(point.latitude + " : " + point.longitude);
googleMap.clear();
googleMap.animateCamera(CameraUpdateFactory.newLatLng(point));
googleMap.addMarker(markerOptions);
// Create location object
Location location = new Location(point.latitude, point.longitude);
// add location to SQLite database
locationsDB.insert(location);
}
});
}
});
return rootView;
}
}
7-20 07:33:00.076 5359-5359/? W / RcsService: hipoteca.idioma.Nullpointerexcepção: tentativa de invocar o método virtual 'void com.o.androide.rcs.servico.servico.a. a. A ()' em uma referência de objeto nulo no com.o.androide.rcs.servico.E. B(Fonte: 43) no com.o.androide.rcs.servico.servico.JibeService.onDestroy(fonte: 162) no android.aplicacao.Activitytread.handleStopService(ActivityThread.java: 3569) no android.aplicacao.Activitytread.- wrap26(Fonte desconhecida: 0) no android.aplicacao.Activityread$H. handleMessage (ActivityThread.java: 1703) no android.o.Manipulador.envio de mensagens(manipulador.java: 105) no android.o.Looper.loop (Looper.java: 164) em androide.aplicacao.Activitytread.main (Activitytread.java: 6540) em java.idioma.reflectir.Metodo.invocar (método nativo) no com.androide.interno.o.Zygote$MethodAndArgsCaller.corre!java: 240) no com.androide.interno.o.ZygoteInit.main (ZygoteInit.java: 767)
07-20 07:33:00.079 5359-5359/? E / Activitread: Serviço suplemento.o.androide.rcs.servico.servico.JibeService vazou Intercomunicador.o.androide.rcs.servico.aprovisionamento.RcsReconfigurationSmsReceiver@741339 que foi originalmente registrado aqui. Está a perder uma chamada para o não-participante()? androide.aplicacao.Intentreceiverlaked: Service com.o.androide.rcs.servico.servico.JibeService vazou Intercomunicador.o.androide.rcs.servico.aprovisionamento.RcsReconfigurationSmsReceiver@741339 que foi originalmente registado aqui. Está a perder uma chamada para o não-participante()? no android.aplicacao."LoadedApk $ ReceiverDispatcher".(LoadedApk.java:1310) no android.aplicacao.LoadedApk.getReceiverDispatcher(LoadedApk.java: 1091) no android.aplicacao.ContextImpl.registerreaceitointerno(ContextImpl.java: 1397) no android.aplicacao.ContextImpl.registerReceiver(ContextImpl.java: 1370) no android.aplicacao.ContextImpl.registerReceiver(ContextImpl.java: 1358) no android.conteudo.ContextWrapper.registerReceiver(ContextWrapper.java: 603) no com.o.androide.rcs.servico.aprovisionamento.RcsSmsReceiver.a(fonte: 12) no com.o.androide.rcs.servico.H. G. (fonte: 230) no com.o.androide.rcs.servico.h. (fonte: 212) no com.o.androide.rcs.servico.servico.A. (fonte: 13) no com.o.androide.rcs.servico.E. A. (fonte:32) em suplemento.o.androide.rcs.servico.servico.JibeService.d(Fonte: 145) no com.o.androide.rcs.servico.servico.JibeService.oncreato (Código Comercial:91) no android.aplicacao.Activitytread.handleCreateService(ActivityThread.java: 3404) no android.aplicacao.Activitytread.- wrap4 (Fonte desconhecida: 0) em androide.aplicacao.Activityread$H. handleMessage (ActivityThread.java: 1683) no android.o.Manipulador.envio de mensagens(manipulador.java: 105) no android.o.Looper.loop (Looper.java: 164) no android.aplicacao.Activitytread.main (Activitytread.java: 6540) em java.idioma.reflectir.Metodo.invocar (método nativo) no com.androide.interno.o.Zygote$MethodAndArgsCaller.corre!java: 240) no com.androide.interno.o.ZygoteInit.main (ZygoteInit.java: 767)
5 answers
Se quiser adicionar um marcador ao carregar também pode procurar aqui: http://wptrafficanalyzer.in/blog/adding-marker-on-touched-location-of-google-maps-using-android-api-v2-with-supportmapfragment/
O consept é fazer como o código seguinte:
// Setting a click event handler for the map
googleMap.setOnMapClickListener(new OnMapClickListener() {
@Override
public void onMapClick(LatLng latLng) {
// Creating a marker
MarkerOptions markerOptions = new MarkerOptions();
// Setting the position for the marker
markerOptions.position(latLng);
// Setting the title for the marker.
// This will be displayed on taping the marker
markerOptions.title(latLng.latitude + " : " + latLng.longitude);
// Clears the previously touched position
googleMap.clear();
// Animating to the touched position
googleMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
// Placing a marker on the touched position
googleMap.addMarker(markerOptions);
}
});
Obter a latitude e longitude da posição actual dos utilizadores
LatLng latLng = new LatLng(lat, lng);
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
mMap.clear();
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory.fromResource(R.drawable.marker));
markerOptions.getPosition();
mCurrLocationMarker = mMap.addMarker(markerOptions);
//Show Marker on a Location
googleMap.addMarker(new MarkerOptions().position(TIMES_SQUARE));
//Change Default Color of Marker
googleMap.addMarker(new MarkerOptions()
.position(BROOKLYN_BRIDGE)
.title("First Pit Stop")
.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_GREEN)));
//Replace Default Marker Icon with Custom Image
googleMap.addMarker(new MarkerOptions()
.position(WALL_STREET)
.title("Wrong Turn!")
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.my_flag)));
// create marker
MarkerOptions marker = new MarkerOptions().position(new LatLng(latitude, longitude)).title("Hello Maps");
// adding marker
googleMap.addMarker(marker);
Este código em MapsActivity funciona para mim:
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, GoogleMap.OnMapLongClickListener {
private GoogleMap mMap;
LocationManager locationManager;
LocationListener locationListener;
public void centreMapOnLocation(Location location, String title){
LatLng userLocation = new LatLng(location.getLatitude(),location.getLongitude());
mMap.clear();
mMap.addMarker(new MarkerOptions().position(userLocation).title(title));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(userLocation,12));
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (grantResults.length>0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED){
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);
Location lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
centreMapOnLocation(lastKnownLocation,"Your Location");
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps2);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.setOnMapLongClickListener(this);
Intent intent = getIntent();
if (intent.getIntExtra("Place Number",0) == 0 ){
// Zoom into users location
locationManager = (LocationManager)this.getSystemService(Context.LOCATION_SERVICE);
locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
centreMapOnLocation(location,"Your Location");
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
@Override
public void onProviderEnabled(String s) {
}
@Override
public void onProviderDisabled(String s) {
}
};
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED){
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,locationListener);
Location lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
centreMapOnLocation(lastKnownLocation,"Your Location");
} else {
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.ACCESS_FINE_LOCATION},1);
}
} else {
Location placeLocation = new Location(LocationManager.GPS_PROVIDER);
placeLocation.setLatitude(MainActivity.location.get(intent.getIntExtra("Place Number",0)).latitude);
placeLocation.setLongitude(MainActivity.location.get(intent.getIntExtra("Place Number",0)).longitude);
centreMapOnLocation(placeLocation,MainActivity.places.get(intent.getIntExtra("Place Number",0)));
}
}
@Override
public void onMapLongClick(LatLng latLng) {
Geocoder geocoder = new Geocoder(getApplicationContext(), Locale.getDefault());
String adress ="";
try {
List<Address> listaddress = geocoder.getFromLocation(latLng.latitude,latLng.longitude,1);
if (listaddress != null && listaddress.size()>0){
if (listaddress.get(0).getThoroughfare() != null){
if (listaddress.get(0).getSubThoroughfare() != null){
adress += listaddress.get(0).getSubThoroughfare() + "";
}
adress += listaddress.get(0).getThoroughfare();
}
}
}catch (Exception e){
e.printStackTrace();
}
mMap.addMarker(new MarkerOptions().position(latLng).title(adress));
MainActivity.places.add(adress);
MainActivity.location.add(latLng);
MainActivity.arrayAdapter.notifyDataSetChanged();
Toast.makeText(this, "Location Saved..!", Toast.LENGTH_SHORT).show();
}
}