Android GPS定位赢了'；t更新

我想编程一个GPS定位器，每15秒更新一次位置。但是，要更新的方法（onLocationChanged）未调用。。。 当按下按钮时，它只设置文本视图中位置的一次时间，显示的时间有时也是在

确切地说，什么时候呼叫get-onLocationChanged？每10秒（或更快）强制一次，还是仅在位置更改时强制一次

我的代码（只有GPS的代码，还有检查google play服务是否激活的代码）：

代码部分复制自Google开发者培训网站

请尝试以下代码：-

public class GPSTracker extends Service implements LocationListener 
{

    private final Context mContext;

    // flag for GPS status
    boolean isGPSEnabled = false;

    // flag for network status
    boolean isNetworkEnabled = false;

    boolean canGetLocation = false;

    Location location; // location
    public static double latitude; // latitude
    public static double longitude; // longitude

    // The minimum distance to change Updates in meters
    private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters

    // The minimum time between updates in milliseconds
    private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute

    // Declaring a Location Manager
    protected LocationManager locationManager;

    public GPSTracker(Context context) 
    {

        this.mContext = context;
        getLocation();
    }

    public Location getLocation() 
    {
        try 
        {
            locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);

            // getting GPS status
            isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

            // getting network status
            isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

            if (!isGPSEnabled && !isNetworkEnabled) 
            {
                // no network provider is enabled
            } 
            else 
            {
                this.canGetLocation = true;
                // First get location from Network Provider
                if (isNetworkEnabled) 
                {
                    locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,
                            MIN_TIME_BW_UPDATES,MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
//                  Log.d("Network", "Network");
                    if (locationManager != null) 
                    {
                        location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                        if (location != null)
                        {
                            latitude = location.getLatitude();
                            longitude = location.getLongitude();
//                          System.out.println("latitude    if (isNetworkEnabled)   => "+latitude);
//                          System.out.println("longitude   if (isNetworkEnabled)   => "+longitude);
                        }
                    }
                }
                // if GPS Enabled get lat/long using GPS Services
                if (isGPSEnabled) 
                {
                    if (location == null)
                    {
                        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
                                MIN_TIME_BW_UPDATES,MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
//                      Log.d("GPS Enabled", "GPS Enabled");
                        if (locationManager != null)
                        {
                            location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
                            if (location != null)
                            {
                                latitude = location.getLatitude();
                                longitude = location.getLongitude();
//                              System.out.println("latitude    if (isGPSEnabled)   => "+latitude);
//                              System.out.println("longitude   if (isGPSEnabled)   => "+longitude);
                            }
                        }
                    }
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

        return location;
    }

    @Override
    public void onLocationChanged(Location location) 
    {
    }

    @Override
    public void onProviderDisabled(String provider)
    {
    }

    @Override
    public void onProviderEnabled(String provider)
    {
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) 
    {
    }

    @Override
    public IBinder onBind(Intent arg0) 
    {
        return null;
    }
}

当您需要lat和long时，请按如下方式呼叫：-

new GPSTracker();
System.out.println(GPSTracker.latitude + GPSTracker.longitude);

---

我不知道错误是什么，但现在它工作了。谢谢您！

new GPSTracker();
System.out.println(GPSTracker.latitude + GPSTracker.longitude);