Question

其实我想实现一个谷歌地图，我可以用蓝色标记找到我当前的位置并传播这个标记，我希望附近的医院最大间隔 1KM 用红色标记，当我点击任何标记我想显示它的路线，任何想法？

以下是我当前位置的代码

   package com.example.stcnhg.enkaz;
    import android.Manifest;
    import android.content.pm.PackageManager;
    import android.location.Address;
    import android.location.Geocoder;
    import android.location.Location;
    import android.location.LocationListener;
    import android.location.LocationManager;
    import android.support.annotation.Nullable;
    import android.support.v4.app.ActivityCompat;
    import android.support.v4.app.Fragment;
    import android.support.v4.app.FragmentActivity;
    import android.os.Bundle;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.Button;
    import android.widget.TextView;

    import com.google.android.gms.maps.CameraUpdateFactory;
    import com.google.android.gms.maps.GoogleMap;
    import com.google.android.gms.maps.OnMapReadyCallback;
    import com.google.android.gms.maps.SupportMapFragment;
    import com.google.android.gms.maps.model.LatLng;
    import com.google.android.gms.maps.model.MarkerOptions;

    import java.io.IOException;
    import java.util.List;

    import static android.content.Context.LOCATION_SERVICE;

    public class MapsActivity extends Fragment implements OnMapReadyCallback {

        private GoogleMap mMap;
        LocationManager locationManager;

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

        @Nullable
        @Override
        public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
            View v = inflater.inflate(R.layout.activity_maps, container, false);
            SupportMapFragment mapFragment = (SupportMapFragment) this.getChildFragmentManager().findFragmentById(R.id.map);
            mapFragment.getMapAsync(this);
            locationManager = (LocationManager) getActivity().getSystemService(LOCATION_SERVICE);
            if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                // TODO: Consider calling
                //    ActivityCompat#requestPermissions
                // here to request the missing permissions, and then overriding
                //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
                //                                         int[] grantResults)
                // to handle the case where the user grants the permission. See the documentation
                // for ActivityCompat#requestPermissions for more details.

            }
            if(locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)){

                locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 60000, 20, new LocationListener() {
                    @Override
                    public void onLocationChanged(Location location) {
                        double latitude = location.getLatitude();
                        double longitude = location.getLongitude();
                        LatLng latLng = new LatLng(latitude,longitude);
                        Geocoder geocoder = new Geocoder(getContext());
                        try {
                            List<Address> addressList = geocoder.getFromLocation(latitude,longitude,1);
                            String str = addressList.get(0).getLocality()+",";
                            str += addressList.get(0).getCountryName();
                            mMap.addMarker(new MarkerOptions().position(latLng).title(str));
                            mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,12));
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }

                    @Override
                    public void onStatusChanged(String provider, int status, Bundle extras) {

                    }

                    @Override
                    public void onProviderEnabled(String provider) {

                    }

                    @Override
                    public void onProviderDisabled(String provider) {

                    }
                });
            }

            return v;
        }



        /**
         * Manipulates the map once available.
         * This callback is triggered when the map is ready to be used.
         * This is where we can add markers or lines, add listeners or move the camera. In this case,
         * we just add a marker near Sydney, Australia.
         * If Google Play services is not installed on the device, the user will be prompted to install
         * it inside the SupportMapFragment. This method will only be triggered once the user has
         * installed Google Play services and returned to the app.
         */
        @Override
        public void onMapReady(GoogleMap googleMap) {
            mMap = googleMap;

            // Add a marker in Sydney and move the camera
           // LatLng sydney = new LatLng(-34, 151);
            //mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
            //mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
            //mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(sydney,12.0f));
        }

    }

Answer 1

使用谷歌地方api，它将为您提供附近的所有地方。通过使用此功能，您无需编写逻辑来查找developers.google.com/places/android-api/start附近的医院

如何将当前位置和附近医院的标记添加1KM，如果我的当前位置更改了附近医院显示的变化？

1 个答案: