Android Logcat Error: Attempt to invoke virtual method 'double android.location.Location.getLatitude()' on a null object reference

Question

Good day!

I am currently experiencing a dilemma where my code works on one of my Android devices but force closes on the other one.

Based on the my logcat, this is the error:

02-27 06:37:29.134 23579-23579/com.example.maui.dabtrain E/UncaughtException: java.lang.NullPointerException: Attempt to invoke virtual method 'double android.location.Location.getLatitude()' on a null object reference
                                                                              at com.example.maui.dabtrain.MainActivity.onMapReady(MainActivity.java:504)
                                                                              at com.google.android.gms.maps.SupportMapFragment$zza$1.zza(Unknown Source)
                                                                              at com.google.android.gms.maps.internal.zzt$zza.onTransact(Unknown Source)
                                                                              at android.os.Binder.transact(Binder.java:507)
                                                                              at com.google.android.gms.maps.internal.bw.a(:com.google.android.gms.DynamiteModulesB:82)
                                                                              at com.google.maps.api.android.lib6.impl.bf.run(:com.google.android.gms.DynamiteModulesB:1805)
                                                                              at android.os.Handler.handleCallback(Handler.java:751)
                                                                              at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                              at android.os.Looper.loop(Looper.java:154)
                                                                              at android.app.ActivityThread.main(ActivityThread.java:6688)
                                                                              at java.lang.reflect.Method.invoke(Native Method)
                                                                              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)
                                                                              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)

Here is the code for my location:

        gMap = googleMap;

        if(!gMap.isMyLocationEnabled())
            gMap.setMyLocationEnabled(true);

        LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
        Location myLocation = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);


        if (myLocation == null) {
            Criteria criteria = new Criteria();
            criteria.setAccuracy(Criteria.ACCURACY_COARSE);
            String provider = lm.getBestProvider(criteria, true);
            myLocation = lm.getLastKnownLocation(provider);
        }


    LatLng userLocation = new LatLng(myLocation.getLatitude(), myLocation.getLongitude());
    gMap.animateCamera(CameraUpdateFactory.newLatLngZoom(userLocation, 13), 1500, null);

The rest of the code is for Google Markers, Polyline, Radius, etc.

Thank you for your time!

try read this, `mylocation` return null `http://stackoverflow.com/questions/20438627/getlastknownlocation-returns-null` — Iqbal Rizky, Feb 26 '17 at 22:59
Duplicate of: [What is a NullPoiterException and how do I fix it](http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception-and-how-do-i-fix-it) — Phantômaxx, Feb 27 '17 at 07:58
@Rotwang - may you please guide me on what to do? Thank you. — Simone Walter Macatangay, Feb 27 '17 at 13:05
As with ALL NPEs, find the object you're referencing while it still has not been instanced. Instance it BEFORE using it. — Phantômaxx, Feb 27 '17 at 13:12

score 0 · Answer 1 · answered Feb 26 '17 at 22:55

0

It is because of getLastKnownLocation is returned as null, if you look at the method

https://developer.android.com/reference/android/location/LocationManager.html#getLastKnownLocation(java.lang.String)

This can be done without starting the provider. Note that this location could be out-of-date, for example if the device was turned off and moved to another location. If the provider is currently disabled, null is returned.

Having said that, you should always check for null when using getLastKnownLocation

answered Feb 26 '17 at 22:55

WenChao

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Sorry, I'm so lost at the moment. So, what should I do now? – Simone Walter Macatangay Feb 26 '17 at 23:56
add `if(myLocation != null)` before ` LatLng userLocation = new LatLng(myLocation.getLatitude(), myLocation.getLongitude()); ` – WenChao Feb 27 '17 at 00:31
but it gives an error to my Location.distanceBetween if I do. That's why I removed the if(myLocation != null) statement in the first place. Haha! – Simone Walter Macatangay Feb 27 '17 at 00:34
put all code that uses `myLocation` under the `if` statement – WenChao Feb 27 '17 at 00:39
I have tried this as well. I inserted it all under the if (myLocation != null) but all Google Markers, Polylines, Radius does not appear. – Simone Walter Macatangay Feb 27 '17 at 00:43

Android Logcat Error: Attempt to invoke virtual method 'double android.location.Location.getLatitude()' on a null object reference

1 Answers1