CODEWITHSUNDEEP
androidgpslocationlocationmanagerlocationlistener
VPS
VPS

Reputation: 37

GPS location provider gives me null location in Android

I try to find location using GPS_Provider in android. when try to get location using Network_Provider than it give me location and call callback function properly, but when I tried to get location using GPS_Provider than it give me location null & also not calling callback function onLocationChanged of LocationListener.

My code is:

 LocationManager lm;
    boolean isNetwork = false;
    Location location;
    LocationListener locationListener;
    LocationListener loc;
    MyLocation myLocation;
    Location location1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

        try {
            myLocation = new MyLocation();

            if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                // TODO: Consider calling
                Log.e("Location", "Permission Not Given");
                return;
            }
            Log.e("Location", "Permission is Given");
            lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, myLocation);
            location1=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        }catch(Exception e)
        {

        }
    }

MyLocation.class

public class MyLocation implements LocationListener {
    @Override
    public void onLocationChanged(Location location) {

        if(location!=null)
        {

            String lat,Longi;
            lat=String.valueOf(location.getLatitude());
            Longi=String.valueOf(location.getLongitude());

            Log.e("Latitude: " , lat);
            Log.e("Longitude: " , Longi);

        }
        else
            Log.e("Location is null", "Location not Found");
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        Log.e("Latitude: " ,""+ provider+ " Status: "+status);
    }

    @Override
    public void onProviderEnabled(String provider) {

    }

    @Override
    public void onProviderDisabled(String provider) {
        Log.e("Latitude: " , provider);
    }
}

It give me logcat error as follow:

02-04 00:50:52.280 14480-14480/com.arc.locationusingnetwork E/Location: Permission is Given
02-04 00:50:52.360 14480-14480/com.arc.locationusingnetwork E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 46
02-04 00:50:52.370 14480-14480/com.arc.locationusingnetwork E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 49
02-04 00:50:52.370 14480-14480/com.arc.locationusingnetwork E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 50
02-04 00:50:52.380 14480-14480/com.arc.locationusingnetwork E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 50
02-04 00:50:52.380 14480-14480/com.arc.locationusingnetwork E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 50
02-04 00:50:52.390 14480-14480/com.arc.locationusingnetwork E/IMGSRV: :0: PVRDRMOpen: TP3, ret = 52

Upvotes: 1

Views: 4255

Answers (3)

Kapil Rajput
Kapil Rajput

Reputation: 11545

You need to move your device to call onLocationChanged of LocationListener as LocationListener is Used for receiving notifications from the LocationManager when the location has changed. These methods are called if the LocationListener has been registered with the location manager service using the LocationManager.requestLocationUpdates(String, long, float, LocationListener) method.

Now there is no guarantee that getLastKnownLocation always return Location as it returns last location but if app is installed freshly or user did clear data then gps last known location returns null so to handle this you should move your device so that onLocationChanged is called ( I recommend to move in open so that device connect to gps fast).

OR

You can use FusedLocationProviderApi as it is the latest API and the best among the available possibilities to get location in Android. google docs : Getting the Last Known Location

Upvotes: 0

Petterson
Petterson

Reputation: 851

Have you checked if your GNSS/GPS is Enabled?

boolean gpsEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);

Upvotes: 0

Tafveez Mehdi
Tafveez Mehdi

Reputation: 456

The old LocationListener class is probably deprecated. You should use FusedLocationApi by Android to fetch current location or receive location updates via FusedLocationAPI's LocationListener.

It's a good tutorial for using FusedLocationApi : Android Location API

Upvotes: 2

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