为什么当前位置与 FusedLocationClient.requestLocationUpdates 提供的位置之间存在差异

Question

我只想在从当前位置移动至少 3 米时获取当前位置更新，为此我使用了

FusedLocationClient.requestLocationUpdates

为此，我做了这样的 LocationRequest：

 private LocationRequest requestLocation(){

 LocationRequest mLocationRequest = new LocationRequest();                                                                                                              
 mLocationRequest.setSmallestDisplacement(3.81f);                                                                                                                                                 
 mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);            
 return mLocationRequest;                                                         
 }

并像这样实现：连接到播放服务后

@Override
public void onConnected(Bundle bundle) {                                                                  

mFusedLocationClient.requestLocationUpdates(requestLocation(), 
new LocationCallback() {               
    @Override                                                                                         
    public void onLocationResult(LocationResult locationResult) {                                     
        for (final Location location : locationResult.getLocations()) {                               

            tvLat.setText(Double.toString(location.getLatitude()));                                   
            tvLng.setText(Double.toString(location.getLongitude()));                                  

           //changing position of marker and camera                                                                                    
            changeCameraPosition(CameraUpdateFactory.newLatLngZoom(                                   
             new LatLng(location.getLatitude(), location.getLongitude()),                      
                    16), new GoogleMap.CancelableCallback() {                                         

      @Override                                                                             
      public void onFinish() {}                                                          


      @Override                                                                             
      public void onCancel() { }                                                             

            });                                                                                       

        }                                                                                             
    }                                                                                                 
    }, Looper.myLooper());                                                                                

但是即使我没有移动一点点，我也会从距离我当前位置至少 650m 的地方获得 latlng，这是我在清单中的权限：

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="permission.READ_GSERVICES" />                                                                                                                                                                                      

Answer 1

也许你可以检查一下这个：Android map Update location to server when there is difference of x meters between current location and last location，看看你移动时的距离差异，这样你就会知道过度移动的根源在哪里。