有没有办法获得5-10 mts的恒定精度？

Question

我正在尝试构建一些位置应用程序，主要问题是准确性数据（不确定getAccuracy（）是否可靠用于测量错误）。我在论坛上看到了一些帖子，其中精确度约为5-10，但对我来说总是大约30mts。

目前，我正在使用fuselocationproviderclient，我不需要这个API密钥吗？ Wifi搜索启用，否则它跳到300~另一件事，我来自南美洲，也许只是我所在地区的更多错误。

public class MainActivity extends AppCompatActivity {

private FusedLocationProviderClient cliente;
private LocationRequest locationRequest;
private LocationCallback locationCallback;

@Override
protected void onCreate(Bundle savedInstanceState) {

    locationRequest = new LocationRequest();
    locationRequest.setInterval(5000);
    locationRequest.setFastestInterval(3000);
    locationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);

    gps_bt.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (gps_bt.isChecked()) {
                sensor.setText("GPS");
                locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
            } else {
                sensor.setText("Torre celular y wifi");
                locationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
            }
        }
    });

    upd_bt.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (upd_bt.isChecked()) {
                actualizacion.setText("Encendidas");
                actualizar = true;
                empezarActualizacion();
            } else {
                actualizacion.setText("Apagadas");
                actualizar = false;
                detenerActualizacion();
            }
        }
    });

    locationCallback = new LocationCallback() {
        @Override
        public void onLocationResult(LocationResult locationResult) {
            super.onLocationResult(locationResult);
            for (Location location : locationResult.getLocations()) {
                latitud.setText(String.valueOf(location.getLatitude()));
                longitud.setText(String.valueOf(location.getLongitude()));
                precision.setText(String.valueOf(location.getAccuracy()));
                if (location.hasAltitude()) {
                    altitud.setText(String.valueOf(location.getAltitude()));
                } else {
                    altitud.setText("No se pudo colectar la altitud");
                }
                if (location.hasSpeed()) {
                    velocidad.setText(String.valueOf(location.getSpeed()) + "m/s");
                } else {
                    velocidad.setText("No se puede recuperar la velocidad");
                }
            }
        }
    };

    cliente = LocationServices.getFusedLocationProviderClient(this);
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
        cliente.getLastLocation().addOnSuccessListener(this, new OnSuccessListener<Location>() {
            @Override
            public void onSuccess(Location location) {
                if (location != null) {
                    latitud.setText(String.valueOf(location.getLatitude()));
                    longitud.setText(String.valueOf(location.getLongitude()));
                    precision.setText(String.valueOf(location.getAccuracy()));
                    if (location.hasAltitude()) {
                        altitud.setText(String.valueOf(location.getAltitude()));
                    } else {
                        altitud.setText("No se pudo colectar la altitud");
                    }
                    if (location.hasSpeed()) {
                        velocidad.setText(String.valueOf(location.getSpeed()) + "m/s");
                    } else {
                        velocidad.setText("No se puede recuperar la velocidad");
                    }
                }
            }
        });
    } else {
        //pedir permisos
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, PERMISO_FINE_LOCATION);
        }
    }

}

它总是扔30mts或更多，正如我之前提到的，如果可能，我希望达到大约10mts。清单文件使用FINE_LOCATION。对于未来的使用，这也适用于手机数据（LTE / 4g / 3g）我是否也必须同意COARSE_LOCATION？它融合位置提供客户端是否具有此目的的最佳选择？使用kalman可以改善纬度/经度数据吗？我在三星S8上进行了测试，但我想从棒棒糖中进行测试。谢谢你们。