无法获取用户位置

我正在尝试获取用户位置网络位置或gps位置或两者。为此，我正在运行一个后台服务，它实现LocationListener。我还在清单文件中添加了所有需要的权限。这是我的服务

public class GetLocation extends Service implements LocationListener {

    LocationManager lm;
    Location networkLocation, gpsLocation;

    @Override
    public void onCreate() {
        super.onCreate();
        lm = (LocationManager) getSystemService(LOCATION_SERVICE);
        if (lm.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
            lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
            gpsLocation = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
            Toast.makeText(getApplicationContext(), "Getting Location Via GPS",
                    Toast.LENGTH_LONG).show();
        }
        if (lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {
            lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0,
                    this);
            networkLocation = lm
                    .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
            Toast.makeText(getApplicationContext(),
                    "Getting location Via Network", Toast.LENGTH_LONG).show();
        }
        if (gpsLocation != null) {
            Toast.makeText(
                    getApplicationContext(),
                    "GPSLOCATION: " + gpsLocation.getLatitude() + " , "
                            + gpsLocation.getLongitude(), Toast.LENGTH_LONG)
                    .show();
        }
        if (networkLocation != null) {
            Toast.makeText(
                    getApplicationContext(),
                    "NETWORKLOCATION: " + networkLocation.getLatitude() + " , "
                            + networkLocation.getLongitude(), Toast.LENGTH_LONG)
                    .show();
        }
        if (gpsLocation == null && networkLocation == null) {
            Toast.makeText(getApplicationContext(),
                    "Couldn't get user location", Toast.LENGTH_LONG).show();
        }

    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        new Thread() {
            public void run() {
                Looper.prepare();

                if (gpsLocation != null) {
                    Log.d("Usman", "GPSLOCATION: " + gpsLocation.getLatitude()
                            + " , " + gpsLocation.getLongitude());
                }
                if (networkLocation != null) {
                    Log.d("Usman",
                            "NETWORKLOCATION: " + networkLocation.getLatitude()
                                    + " , " + networkLocation.getLongitude());
                }
                if (gpsLocation == null && networkLocation == null) {
                    Log.d("Usman", "Couldn't get user lcoation");
                }
                try {
                    Thread.sleep(3000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                Looper.loop();
            }
        }.start();
        return START_STICKY;
    }

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

    @Override
    public void onLocationChanged(Location location) {
        // do something with this location

        Toast.makeText(
                getApplicationContext(),
                location.getProvider() + " Location Changed:"
                        + location.getLatitude() + " , "
                        + location.getLongitude(), Toast.LENGTH_LONG).show();
    }

    @Override
    public void onProviderDisabled(String arg0) {
        Toast.makeText(getApplicationContext(), arg0 + " Disabled",
                Toast.LENGTH_LONG).show();
    }

    @Override
    public void onProviderEnabled(String provider) {
        Toast.makeText(getApplicationContext(), provider + " Enabled",
                Toast.LENGTH_LONG).show();
    }

    @Override
    public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
    }

}

在 onCreate() 方法中，gps 和网络位置均为 null。 谁能告诉我我哪里错了

正如您所说，您甚至没有得到“通过网络获取位置”的祝酒。所以你的执行不会进入 if 块

if (lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER)) {

}

所以请确保您已检查过

Google 的位置服务 - 已选中

在您的设备设置中。

设置 > 位置服务 > Google 位置服务和访问位置。

那么你应该从以下位置获取位置LocationManager。否则你的代码的其余部分看起来不错。

希望这可以帮助。

参考链接 https://stackoverflow.com/questions/10154937/isproviderenabledlocationmanager-network-provider-return-false/15993514#15993514