Question

我创建了用于获取项目当前位置的全局类。每当用户按下Activity上的按钮时，我就会获得位置。

public class Get_Current_Location implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
    GoogleApiClient apiClient;
    Location CurrentLocation;
    LocationRequest locationRequest;
    Context context;
    Interface_For_Location getLocation;
    String TAG = "###Current Location###";


    public Get_Current_Location(Context context,Interface_For_Location location) {
        this.context = context;
        this.getLocation=location;
        apiClient = new GoogleApiClient.Builder(context)
                .addConnectionCallbacks(this)
                .addOnConnectionFailedListener(this)
                .addApi(LocationServices.API)
                .build();
        Log.d(TAG, "Google API BUILD Successfully " + apiClient);
        apiClient.connect();
        setLocationRequest();
    }

    @Override
    public void onConnected(@Nullable Bundle bundle) {
        Log.d(TAG,"On Connected Calling");

        startLocationUpdate();
    }

    @Override
    public void onConnectionSuspended(int i) {

    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

    }

    @Override
    public void onLocationChanged(Location location) {
        Log.d(TAG,"On Location Changed Calling ");
        Log.d(TAG,"Updated Location OnLocationChnaged "+location);
        CurrentLocation=location;
        getLocation.currentLoc(CurrentLocation);
        stopLocationUpdates();
    }

    public void startLocationUpdate() {
        Log.d(TAG,"Start Location Update Calling ");
        if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        LocationServices.FusedLocationApi.requestLocationUpdates(apiClient, locationRequest, this);
    }

    private void stopLocationUpdates(){
        LocationServices.FusedLocationApi.removeLocationUpdates(apiClient,this);
    }

    private void setLocationRequest(){
        Log.d(TAG,"Set Location Update Request Calling");
        locationRequest=new LocationRequest();
        locationRequest.setInterval(10*60*1000);
        locationRequest.setFastestInterval(10*60*1000);
        locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
        locationRequest.setNumUpdates(1);
    }    
}

我通过调用类的接口获取位置。我必须显示50米以下的两个设备的距离，但每当我试图获得彼此相邻的设备的位置时，两者都产生超过2000的精度。由于这种低精度水平，我无法检测到旁边的设备彼此。

请指导我将此精度水平降至100以下，以便检测59米以下的设备。

Answer 1

有时，设备需要时间才能获得良好的位置（GPS或网络），因此您可能会在短时间内获得非常不准确的点数。您需要为所需的准确度添加过滤器，并且只有在获得所需的点时才关闭位置更新。以下是如何执行此操作的示例：

@Override
public void onLocationChanged(Location location) {
    Log.d(TAG,"On Location Changed Calling ");
    if (location.getAccuracy() <= MIN_ACCURACY) {
        Log.d(TAG,"Updated Location OnLocationChnaged "+location);
        CurrentLocation=location;
        getLocation.currentLoc(CurrentLocation);
        stopLocationUpdates();
    }
    //Else don't stop the update until a location with good accuracy is received.
}

即使设备处于高精度，融合位置也能提供超过2000的精度

1 个答案: