无法使用Java在android studio中找到附近的地方

Question

我正在开发一个Android项目，我想搜索附近的地方（例如医院），但是这段代码不起作用。 从我在调试模式中看到的情况来看，它跳过了这一行：placesClient.findCurrentPlace(request).addOnCompleteListener(new OnCompleteListener()

当然还有这一行下面的代码。 有人知道为什么吗？您可以在下面看到完整的代码。

    Places.initialize(this, getString(R.string.google_maps_key));
    PlacesClient placesClient = Places.createClient(this);

    List<Place.Field> placeFields = Arrays.asList(Place.Field.NAME);
    FindCurrentPlaceRequest request = FindCurrentPlaceRequest.newInstance(placeFields);
    placesClient.findCurrentPlace(request).addOnCompleteListener(new OnCompleteListener<FindCurrentPlaceResponse>() {
                @Override
                public void onComplete(@NonNull Task<FindCurrentPlaceResponse> task) {
                    FindCurrentPlaceResponse response = task.getResult();
                    for(PlaceLikelihood placeLikelihood : response.getPlaceLikelihoods()){
                        Place place = placeLikelihood.getPlace();
                        List<Place.Type> types = place.getTypes();
                        if(types != null && types.contains(Place.Type.HOSPITAL)){
                            map.addMarker(new MarkerOptions()
                                    .position(place.getLatLng())
                                    .title(place.getName())
                                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_CYAN)));
                        }
                    }
                }
            });

Answer 1

检查事项：

首先，仔细检查 logcat，因为您可能会遇到 API 密钥设置问题或权限错误。这两者都存在问题是很常见的。

其次，使用 OnCompleteListener 设置调试断点或添加可在 logcat 中找到的日志消息。这里的目标是确保回调被调用。在提供的代码片段中，除非找到医院，否则不会执行任何明显的操作。

第三，考虑更新相机以确保视图集中在结果上。

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
    private GoogleMap mMap;

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

        com.example.playground.databinding.ActivityMapsBinding binding = ActivityMapsBinding.inflate(getLayoutInflater());
        setContentView(binding.getRoot());

        // 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);
    }

    // Normal, you should check that the app has the required permissions.
    @SuppressLint("MissingPermission")
    void getCurrentPlace() {
        String apiKey = BuildConfig.PLACES_API_KEY;

        Places.initialize(this, apiKey);
        PlacesClient placesClient = Places.createClient(this);

        List<Place.Field> placeFields = Arrays.asList(Place.Field.NAME, Place.Field.LAT_LNG);
        FindCurrentPlaceRequest request = FindCurrentPlaceRequest.newInstance(placeFields);

        placesClient.findCurrentPlace(request)
                .addOnCompleteListener(task -> {
                    FindCurrentPlaceResponse response = task.getResult();

                    LatLngBounds.Builder bounds = LatLngBounds.builder();

                    for (PlaceLikelihood placeLikelihood : response.getPlaceLikelihoods()) {
                        Place place = placeLikelihood.getPlace();
                        Log.e("PlacesDemo", "Found place: " + place.getName());

                        List<Place.Type> types = place.getTypes();
                        if (types != null && types.contains(Place.Type.STORE)) {
                            mMap.addMarker(new MarkerOptions()
                                    .position(Objects.requireNonNull(place.getLatLng()))
                                    .title(place.getName())
                                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_CYAN)));
                        } else {
                            mMap.addMarker(new MarkerOptions()
                                    .position(Objects.requireNonNull(place.getLatLng()))
                                    .title(place.getName())
                                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA)));
                        }

                        if (place.getLatLng() != null)
                            bounds.include(place.getLatLng());
                    }
                    mMap.moveCamera(CameraUpdateFactory.newLatLngBounds(bounds.build(), 100));
                })
                .addOnFailureListener(task -> {
                    String message = task.getMessage();
                    Log.e("PlacesDemo", message);
                });
    }

    @Override
    public void onMapReady(@NonNull 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));

        getCurrentPlace();
    }
}