onGpsStatusChanged NOT firing for GpsStatus.Listener

Question

Would like to listen to gps availability. Followed this. However, onGpsStatusChanged was not fired even when I disabled/enabled gps. Tried on multiple phones. Also, looked into related stackoverflow Qns such as this, this and this. However met with no success. Any help is appreciated. Thanks!

Code Snippets:

Listener

Listener mGPSListener = new GpsStatus.Listener() {

    @Override
    public void onGpsStatusChanged(final int event) {
        Log.d(TAG, "---onGpsStatusChanged---");
        switch (event) {
            case GpsStatus.GPS_EVENT_STARTED:
                Log.d(TAG, "GPS_EVENT_STARTED");
                break;
            case GpsStatus.GPS_EVENT_FIRST_FIX:
                Log.d(TAG, "GPS_EVENT_FIRST_FIX");
                break;
            case GpsStatus.GPS_EVENT_STOPPED:
                Log.d(TAG, "GPS_EVENT_STOPPED");
                break;
            case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
                Log.d(TAG, "GPS_EVENT_SATELLITE_STATUS");
                break;
            default:
                Log.d(TAG, "SOMETHING_ELSE");
                break;
        }


    }


};

Service

.....
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        super.onStartCommand(intent, flags, startId);
        Log.d(TAG, "onStartCommand");
        Context ctx = getBaseContext();
        Log.d(TAG, "Done, " + ctx);
        LocationManager locManager = (LocationManager)
        ctx.getSystemService(Context.LOCATION_SERVICE);
        Log.d(TAG, "Got locManager");
        locManager.addGpsStatusListener(mGPSListener);
        Log.d(TAG, "Added -> locManager.addGpsStatusListener(mGPSListener)");
        return START_STICKY;


    }
.....

Could see log statements for context, LocationManager, etc. However nothing from onGpsStatusChanged at all.

Edit1 My manifest contains following permissions:

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

Answer 1

OK, so here is my finding.

If you want onGpsStatusChanged of your GpsStatus.Listener called you need to NOT ONLY register it to your LocationManager using addGpsStatusListener but also listen for location updates by requestLocationUpdates.

As soon as I started listening to location updates by means of requestLocationUpdates of LocationManager class, I started getting gps status changes.