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android - FusedLocationProviderClient 有时会给出不同的位置

问题描述

 public void getDeviceLocation() {
        fusedLocationClient = LocationServices.getFusedLocationProviderClient(getMvpView().getActivity());
        settingsClient = LocationServices.getSettingsClient(getMvpView().getActivity());
        createLocationCallback();
        createLocationRequest();
        buildLocationSettingsRequest();
        startLocationUpdates();
    }


    private void createLocationRequest() {
        locationRequest = new LocationRequest();
        locationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
        locationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
        locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
    }


    private void createLocationCallback() {
        getMvpView().showProgressDialog();
        locationCallback = new LocationCallback() {
            @Override
            public void onLocationResult(LocationResult locationResult) {
                super.onLocationResult(locationResult);
                Location currentLocation = locationResult.getLastLocation();
                getMvpView().showSelectedAddress(getAddressFromLatLng(currentLocation.getLatitude(), currentLocation.getLongitude()));
                fusedLocationClient.removeLocationUpdates(locationCallback);
                getMvpView().hideProgressDialog();
            }
        };
    }


    private void buildLocationSettingsRequest() {
        LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
        builder.addLocationRequest(locationRequest);
        locationSettingsRequest = builder.build();
    }


    private void startLocationUpdates() {
        settingsClient.checkLocationSettings(locationSettingsRequest)
                .addOnSuccessListener(getMvpView().getActivity(), locationSettingsResponse -> {

                    if (ActivityCompat.checkSelfPermission(getMvpView().getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getMvpView().getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                        return;
                    }
                    fusedLocationClient.requestLocationUpdates(locationRequest,
                            locationCallback, Looper.myLooper());

                }).addOnFailureListener(getMvpView().getActivity(), e -> {
            getMvpView().hideProgressDialog();
            getMvpView().showErrorToast(R.string.please_enable_location);
        });
    }


    @SuppressLint("MissingPermission")
    private void startLocationUpdates() {
        settingsClient.checkLocationSettings(locationSettingsRequest)
                .addOnSuccessListener(getMvpView().getActivity(), locationSettingsResponse -> {
                    fusedLocationClient.requestLocationUpdates(locationRequest,
                            locationCallback, Looper.myLooper());

                }).addOnFailureListener(getMvpView().getActivity(), e -> {
            getMvpView().hideProgressDialog();
            getMvpView().showErrorToast(R.string.please_enable_location);
        });
    }


    private String getAddressFromLatLng(double latitude, double longitude) {
        Geocoder geocoder = new Geocoder(getMvpView().getActivity(), Locale.getDefault());
        List<Address> addresses = null;
        try {
            addresses = geocoder.getFromLocation(
                    latitude,
                    longitude,
                    1);
        } catch (IOException e) {
            e.printStackTrace();
        }

        Address address = addresses.get(0);
        StringBuilder addressStringBuilder = new StringBuilder();
        for (int i = 0; i <= address.getMaxAddressLineIndex(); i++) {
            addressStringBuilder.append(address.getAddressLine(i));
        }

        return addressStringBuilder.toString();
    }

我已将 lat、lng 转换为地址文本，但在我再次查询位置后，即使我没有从当前位置移动，地址也会发生变化，也启用了电话设置的准确性。问题是当我总是查询时，如果我的 lat、lng 位置没有改变，它应该给我相同的位置地址。

标签： androidandroid-locationandroid-fusedlocation

解决方案

FusedLocationProviderClient 意味着结合 gps 和 google-translating-received-wlan-cellphone-tower-signals-to-lat-lon。

google-translating-received-wlan-cellphone-tower-signals-to-lat-lon 是一种不精确的启发式方法，除其他因素外，它还取决于您的掌上电脑连接到哪个手机塔（以及谷歌每个塔的纬度/经度在哪里） ) 以及最强的 3 个手机塔有多强。

如果您的手机改变了它的手机塔连接，那么对于 googl-s 算法，您的手机位置已经改变。

如果您的手机可以接收超过 3 个手机信号塔，那么最强的 3 个手机信号塔也会根据每个信号塔的流量而变化。

gps 接收器消耗大量能源。当启用 gps-energy-optimisation 时，可能还会有 gps-precision 问题导致融合位置跳跃。

当我第一次用我全新的手机进行地理寻宝时，我很难学会这一点，我想知道为什么我自己的位置在地图上跳跃

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