CODEWITHSUNDEEP
androidandroid-serviceandroid-location
nickik
nickik

Reputation: 5881

Service stops updating location

I am working on a app that has to work in the background and send location updates to the server.

The code is pretty simple and normaly works. There is a service that has a Timer that sends updates to the server every 15 seconds and it also implements the LocationListener Interface.

I dont think giving all the code would be useful, here is how I set up the class:

@Override
public void onCreate() {
    super.onCreate();

    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER            , 5000, 10.0f, this);
    locationManager.requestLocationUpdates( LocationManager.NETWORK_PROVIDER , 5000, 10.0f, this);

    //Ping Task sends updates to the Server
    Ping_Timer.scheduleAtFixedRate( new Ping_Task(), 5000, Ping_Task.TIME_GET_JOBS*1000 );
}

In practice I have some problems with my code. Services should work in the background, even if the Service stoppes there is a GCM system in place to restart the service in the background.

Even with these protections I still have the problems, sometimes the app does not update the location anymore, even if it is clear that the service is still running. On the Google Maps App I can see that the Location is correct there, but not in my app. How can this be, why do I not get the 'onLocationChanged' event anymore.

Thanks for your help.

Upvotes: 0

Views: 269

Answers (1)

slhddn
slhddn

Reputation: 1997

First, I am not sure about Service life cycle. But I used the code below in onStart() method of the Service. This method is called after calling startService(Intent) method on Context. I guess, you can do this in onCreate() method.

Implement a location listener:

private final static LocationListener listener = new LocationListener() {

    @Override
    public void onLocationChanged(Location location) {
        //locationHandler will be created below.
        Message.obtain(locationHandler, 0, location.getLatitude() + ", " + location.getLongitude()).sendToTarget();
    }

    @Override
    public void onProviderDisabled(String provider) {
    }

    @Override
    public void onProviderEnabled(String provider) {
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
    }
};

Give your listener to the method instead this

locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 5000, 10.0f, listener);
locationManager.requestLocationUpdates( LocationManager.NETWORK_PROVIDER, 5000, 10.0f, listener);

Implement a handler for this listener in your onStart() method in Service.

Handler locationHandler = new Handler() {
    @Override
    public void handleMessage(android.os.Message msg) {
        String location = (String) msg.obj;

        //do what you wanna do with this location

    }
}

This is how I did.

Upvotes: 2

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