Android NullPointerException when getting LocationManager from service context

Question

I'm getting:

 Caused by: java.lang.NullPointerException
        at android.content.ContextWrapper.getSystemService(ContextWrapper.java:423)

when the app:

    locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);

The code which throws the exceptions is:

421:    @Override
422:    public void grantUriPermission(String toPackage, Uri uri, int modeFlags) {
423:        mBase.grantUriPermission(toPackage, uri, modeFlags);
424:    }

(The debugger shows mBase as being null in the call.)

I have checked:

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

and debugged:

context={MyService@830033501600}

Any ideas?

check if `context!=null` then `context.getSystemService(Context.LOCATION_SERVICE);` — Rustam, Sep 05 '15 at 05:34

Derek Fung · Accepted Answer · 2015-09-05T05:40:34.573

1

It seems that you have to use Activity context to get Location Manager.

Was your context an application context? Try changing it to Activity.

Edit:

If you are in Service, run getSystemService in onCreate()

edited Sep 05 '15 at 05:40

answered Sep 05 '15 at 05:32

Derek Fung

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No, my context is a class which `extends Service`. – fadedbee Sep 05 '15 at 05:34
How can I get an application context from a long running service which starts from a BootReceiver? – fadedbee Sep 05 '15 at 05:37
are you calling it in the constructor? you should call the command in onCreate() – Derek Fung Sep 05 '15 at 05:37
Thanks, the problem was that I was calling it (indirectly) from a parameter initialiser in the service. Calling it (indirectly) from the service's `onCreate()` fixed the problem. – fadedbee Sep 05 '15 at 05:43

score 0 · Answer 2 · answered Apr 10 '16 at 06:04

0

Somehow you need to extend Activity class where you will use getSystemService method

answered Apr 10 '16 at 06:04

Anirban Bhui

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Android NullPointerException when getting LocationManager from service context

2 Answers2