如何清洁运行应用程序的GPS数据？

Question

我正在使用GPS开发运行的应用程序。我的问题是，当我不走路时，我的GPS返回垃圾值，我的距离计数器会增加，此外我的活动有时会变慢。这是我的“onCreate”代码：

locManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locListener = new MyLocationListener();
HandlerThread thread = new HandlerThread("MyHandlerThread");
thread.start();

Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setSpeedAccuracy(Criteria.ACCURACY_HIGH);

locManager.requestLocationUpdates(locManager.getBestProvider(criteria,false), 0, 0, locListener, thread.getLooper());

这是我的倾听者：

@Override
public void onLocationChanged(Location loc) {

    cityName = null;
    Geocoder gcd = new Geocoder(getBaseContext(), Locale.getDefault());
    List<Address> addresses;
    try {
        addresses = gcd.getFromLocation(loc.getLatitude(),
                loc.getLongitude(), 1);
        if (addresses.size() > 0) {
            System.out.println(addresses.get(0).getLocality());
            cityName = addresses.get(0).getLocality();
        }
    } catch (IOException e) {
        e.printStackTrace();
    }

    speed = loc.getSpeed() * 3.6; //in km/h

    lat = loc.getLatitude();
    lon = loc.getLongitude();

    if (starting_point) {
        last_long = lon;
        last_lat = lat;
        starting_point = false;
    } else {
        current_long = lon;
        current_lat = lat;

        Location locationA = new Location("Previous");
        locationA.setLatitude(last_lat);
        locationA.setLongitude(last_long);

        double distanceMeters = locationA.distanceTo(loc);

        double distanceKm = distanceMeters / 1000f;
        current_distance = current_distance + distanceKm;

        last_long = current_long;
        last_lat = current_lat;

    }

    //send to UI
    if (my_handler != null) {
        Message msg_ui = my_handler.obtainMessage(GPSActivity.UI_CODE);
        Bundle msg_ui_bundle = new Bundle();
        msg_ui_bundle.putDouble("LAT", lat);
        msg_ui_bundle.putDouble("LON", lon);
        msg_ui_bundle.putDouble("SPEED", speed);
        msg_ui_bundle.putString("CITY", cityName);
        msg_ui_bundle.putDouble("DIST", current_distance);
        msg_ui.setData(msg_ui_bundle);
        my_handler.sendMessage(msg_ui);
    }
}

这是我的UI更新处理程序：

private static Handler serviceHandler = new Handler(Looper.getMainLooper()) {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case UI_CODE:
                    lat= msg.getData().getDouble("LAT");
                    lon = msg.getData().getDouble("LON");
                    speed = msg.getData().getDouble("SPEED");
                    city_name = msg.getData().getString("CITY");
                    distance = msg.getData().getDouble("DIST");

                    tvlat.setText("Lat: "+lat );
                    tvlon.setText("Lon: "+lon);
                    tvspeed.setText("Speed: "+speed );
                    tvcity.setText("City: "+city_name);
                    tvdistance.setText("Distance: "+distance );

                    break;
            }
        }
    };