Location object is null

Question

I am new to android programming. I wanted to develop an application that makes use of Location API. I am using Location Manager for the purpose. Code:

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

                isGPSEnabled = locationManager
                        .isProviderEnabled(LocationManager.GPS_PROVIDER);

                isNetworkEnabled = locationManager
                        .isProviderEnabled(LocationManager.NETWORK_PROVIDER);

                if (!isGPSEnabled && !isNetworkEnabled) {
                } else {
                    this.canGetLocation = true;
                    if (isNetworkEnabled) {
                        locationManager.requestLocationUpdates(
                                LocationManager.NETWORK_PROVIDER,
                                MIN_TIME_BW_UPDATES,
                                MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                        Log.d("clickindia", "Network");
                        if (locationManager != null) {
                            location = locationManager
                                    .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                            Log.d("message","location"+location);
                            if (location != null) {
                                latitude = location.getLatitude();
                                longitude = location.getLongitude();
                            }
                        }
                    }

                    if (isGPSEnabled) {
                        if (location == null) {
                            locationManager.requestLocationUpdates(
                                    LocationManager.GPS_PROVIDER,
                                    MIN_TIME_BW_UPDATES,
                                    MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                            Log.d("message", "GPS Enabled");
                            if (locationManager != null) {
                                location = locationManager
                                        .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                                if (location != null) {
                                    latitude = location.getLatitude();
                                    longitude = location.getLongitude();
                                }
                            }
                        }
                    }
                }

All the necessary permissions have been mentioned in the manifest file. I am running the code on the phone and it seems getLastKnownLocation() is not doing anything. Please help I am stuck

I cannot use new FusedLocationApi because my phone has google play services versions lower than what required to support the googleApiClient and LocationServices.

Answer 1

您可以从

onLocationChanged(Location location)

Answer 2

您是否已 获得 Google Maps API 密钥并在google api 控制台中设置了所有内容？

Answer 3

 best = LocationManager.NETWORK_PROVIDER;
 loc = (LocationManager) getSystemService(LOCATION_SERVICE);
 googleMap.setMyLocationEnabled(true);
 loc.requestLocationUpdates(best,1000,0,this);
 location=loc.getLastKnownLocation(best);

Try this. Your code should work.