Question

如何在不使用活动中的地图的情况下获取当前用户位置？我只想存储位置的坐标？我使用了这段代码，但它没有用！

LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

Criteria criteria = new Criteria();

String provider = locationManager.getBestProvider(criteria, true);

Location location = locationManager.getLastKnownLocation(provider);
latitude = location.getLatitude();
longitude = location.getLongitude();

Answer 1

这就是我在我的应用中使用的，工作得很好：

 public class TheLocationClass implements LocationListener  {
    final long MIN_TIME_INTERVAL = 60 * 1000L;
    private boolean isGPSEnabled = false;
    private boolean isNetworkEnabled = false;
    private Location location;          //  location.getLatitude() & location.getLongitude() will give you what you need...
    private LocationManager locationManager;

    public TheLocationClass()  {
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    }

    public void requestForUpdates(){

        if(locationManager == null) {
            return;
        }

        isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
        isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);

        if (isNetworkEnabled) {
            locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER,0,0,TheLocationClass.this);
            if (locationManager != null) {
                Location tempLocation = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                if (tempLocation != null && isBetterLocation(tempLocation,location))
                    location = tempLocation;
            }
        }
        if (isGPSEnabled) {
            locationManager.requestSingleUpdate(LocationManager.GPS_PROVIDER, TheLocationClass.this, null);
            locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,0, TheLocationClass.this);
            if (locationManager != null) {
                Location tempLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
                if (tempLocation != null  && isBetterLocation(tempLocation,location))
                    location = tempLocation;
            }
        }
    }

    public void stopLocationUpdates(){
        if(locationManager!=null){
            locationManager.removeUpdates(TheLocationClass.this);
        }
    }

    private boolean isBetterLocation(Location location, Location currentBestLocation) {
        if (currentBestLocation == null) {
            return true;
        }

        // Check whether the new location fix is newer or older
        long timeDelta = location.getTime() - currentBestLocation.getTime();
        boolean isSignificantlyNewer = timeDelta > MIN_TIME_INTERVAL;
        boolean isSignificantlyOlder = timeDelta < -MIN_TIME_INTERVAL;
        boolean isNewer = timeDelta > 0;

        // If it's been more than two minutes since the current location, use the new location because the user has likely moved
        if (isSignificantlyNewer) {
            return true;
        } else if (isSignificantlyOlder) {
            return false;
        }

        // Check whether the new location fix is more or less accurate
        int accuracyDelta = (int) (location.getAccuracy() - currentBestLocation.getAccuracy());
        boolean isLessAccurate = accuracyDelta > 0;
        boolean isMoreAccurate = accuracyDelta < 0;
        boolean isSignificantlyLessAccurate = accuracyDelta > 200;

        // Check if the old and new location are from the same provider
        boolean isFromSameProvider = isSameProvider(location.getProvider(),currentBestLocation.getProvider());

        // Determine location quality using a combination of timeliness and accuracy
        if (isMoreAccurate) {
            return true;
        } else if (isNewer && !isLessAccurate) {
            return true;
        } else if (isNewer && !isSignificantlyLessAccurate  && isFromSameProvider) {
            return true;
        }
        return false;
    }

    private boolean isSameProvider(String provider1, String provider2) {
        if (provider1 == null) {
            return provider2 == null;
        }
        return provider1.equals(provider2);
    }

    @Override
    public void onLocationChanged(Location loc) {
        if (loc != null  && isBetterLocation(loc, location)) {
            location = loc;
        }
    }

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

    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {

    }
}

只需创建此类的实例并调用requestForUpdates（）。

变量位置新更新了设备的准确位置。

获取当前位置而不使用android中的map

1 个答案: