locationManager.getLastKnownLocation() return null

Question

i dont understand why locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); return the location null. I gave all permission but its reutning null.

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

GPS will not work while you are in office or building.So you need also check using NETWORK_PROVIDER in such case — Biraj Zalavadia, May 28 '14 at 09:00
@Biraj I gave NETWORK_PROVIDER it still gives null untill after sometime. how can I ensure a not null value before proceeding — Utsav Gupta, Aug 28 '15 at 08:55

score 22 · Accepted Answer · answered May 28 '14 at 09:14

22

I had this exact same problem. It was because my device was not storing a last known location. I simply went on to Google Maps and pinpointed my location with GPS, then a value was returned for getLastKnownLocation()

answered May 28 '14 at 09:14

Twobard

2,553
1
24
27

You are correct, it is suggested to see this answer https://stackoverflow.com/questions/10524381/gps-android-get-positioning-only-once – Udara Kasun Mar 29 '19 at 17:15
this fixed the issue for me, the app developer, but how can I do this without telling my end users to go to Google Maps for a GPS fix? – iSWORD Mar 21 '21 at 14:46

score 12 · Answer 2 · edited Jul 14 '19 at 15:52

12

You can request location updates like this

mLocationManager.requestLocationUpdates(myProvider, 0, 0, locationListener);

then on the first callback in locationListener.onLocationChanged set your coordinates. Just don't forget to call mLocationManager.removeUpdates(locationListener)

edited Jul 14 '19 at 15:52

ONE

567
7
15

answered Nov 03 '14 at 18:08

aknopov

236
3
4

So your answer is to just not use `getLastKnownLocation()` at all? why? – Stealth Rabbi Mar 15 '19 at 11:46

score 4 · Answer 3 · answered May 28 '14 at 09:12

Accoding to the documentation, it returns null, if the device is not aware of the last known location. Probably the GPS can not locate you. It takes about a minute or more, anyway. So try to go outside, under the clear sky, away from tall buildings, and wait until GPS can locate you.

score 3 · Answer 4 · answered May 28 '14 at 09:14

I used this method for get location i think it will help you

private void startReceivingLocationUpdates() {

    if (mLocationManager == null) {

        mLocationManager = (android.location.LocationManager)
                mContext.getSystemService(Context.LOCATION_SERVICE);

    }

    if (mLocationManager != null) {

        try {

            mLocationManager.requestLocationUpdates(

                    android.location.LocationManager.NETWORK_PROVIDER,
                    1000,
                    0F,
                    mLocationListeners[1]);

        } 
     catch (SecurityException ex) 
         {
            Log.i(TAG, "fail to request location update, ignore", ex);

        } 

       catch (IllegalArgumentException ex)
       {
            Log.d(TAG, "provider does not exist " + ex.getMessage());
        }

        try {

            mLocationManager.requestLocationUpdates(

                    android.location.LocationManager.GPS_PROVIDER,
                    1000,
                    0F,
                    mLocationListeners[0]);

            if (mListener != null) mListener.showGpsOnScreenIndicator(false);


        }
       catch (SecurityException ex) {

            Log.i(TAG, "fail to request location update, ignore", ex); } 

        catch (IllegalArgumentException ex) {

            Log.d(TAG, "provider does not exist " + ex.getMessage());  }

        Log.d(TAG, "startReceivingLocationUpdates");
    }
}

score 1 · Answer 5 · answered May 28 '14 at 09:04

When you use GPS as provider then it gives your result with in 1 to 2 mnts so you have to contentiously check for that when get location stop and Network Provider gives you immediate locationwhen you request. So you dont get immediate Location lat lon in GPS provider.

GPS take 1 to 2 only first time then after it will give location you on call...

locationManager.getLastKnownLocation() return null

5 Answers5

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