java - 如何确定当前本地化并向 Android 中的 GoogleMapsApi 添加标记

Question

我无法解决这个问题。我尝试用 map 创建 fragment 并且我已经完成了。当我添加静态长、纬度值时， map 会显示此 map ，但是当我尝试通过在可运行中获取本地化来自动实现时，应用程序只需打开 map 并且不显示特定的 LongLand 值。

如何做到这一点？

为了变得又长又晚，我使用 LocalizationManager，当然，我在 list 中添加权限并检查运行时

public class LocalizationFragment extends Fragment implements OnMapReadyCallback {


private GoogleMap map;
MapView mapView;
View mview;
private double latitude, longtitude;
private Handler handler;
private Runnable runnable;


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

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

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    mview = inflater.inflate(R.layout.fragment_localization, container, false);
    handler = new Handler();
    getLocation();
    if (ContextCompat.checkSelfPermission(getContext(), android.Manifest.permission.CAMERA)
            != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(getActivity(), new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, 13);
    }
    if (ContextCompat.checkSelfPermission(getContext(), android.Manifest.permission.CAMERA)
            != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(getActivity(), new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 11);
    }
    return mview;
}

@OnClick(R.id.button)
public void buttonStart() {
    getLocation();
}

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    mapView = (MapView) mview.findViewById(R.id.mapView);
    if (mapView != null) {
        mapView.onCreate(null);
        mapView.onResume();
        mapView.getMapAsync(this);
    }
}

private void getLocation() {
    LocationManager locationManager = (LocationManager) getContext().getSystemService(Context.LOCATION_SERVICE);

    LocationListener locationListener = new LocationListener() {

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onProviderEnabled(String provider) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onProviderDisabled(String provider) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onLocationChanged(Location location) {
            // TODO Auto-generated method stub
            latitude = location.getLatitude();
            longtitude = location.getLongitude();
        }
    };
    if (ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION)
            != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission
            (getContext(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
        return;
    }
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);

}

@Override
public void onMapReady(final GoogleMap googleMap) {
    MapsInitializer.initialize(getContext());
    map = googleMap;
    googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
    runnable = new Runnable() {
        @Override
        public void run() {
            getLocation();
            googleMap.addMarker(new MarkerOptions().position(new LatLng(latitude, longtitude)).title("Statue").snippet("Something"));
            CameraPosition liberty = CameraPosition.builder().target(new LatLng(latitude, longtitude)).zoom(15).bearing(0).tilt(45).build();
            googleMap.moveCamera(CameraUpdateFactory.newCameraPosition(liberty));
            handler.postDelayed(this, 5000);
        }
    };
  }
}

Answer 1

您需要从主线程添加标记。将其添加到您的可运行程序中。

 runOnUiThread(new Runnable() {

                    @Override
                    public void run() {
                    googleMap.addMarker(new MarkerOptions().position(new LatLng(latitude, longtitude)).title("Statue").snippet("Something"));
                    }
                });