Android foreground service lose context

问题

I have a little problem understanding what's going on with a service lifecycle that I created. My Application declare and use a service "LocalisationSevice" which its goal is to start a location listener and add the updated location to an array.

Simple as that. The service run foreground.

The problem is that if I manually kill my application though the task switcher or eclipse the service will stay (GPS and notification are here in the notification area). Thats fine, it is what I want, if I click on the notification it will take me back to my application saved state. But now the problem is if I launch the application by clicking on the icon instead of the service notification it will start the application from the start. But it should restore the application into the latest state no ? Like if I have clicked on the service notification.

I start the service like this:

Intent i = new Intent(this, LocalisationService.class);
startService(i);

Here is the code of the service:

public class LocalisationService extends Service {

private LocationManager locationManager;
private LocationListener locationListener;

@Override
public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    Notification notification = new Notification(R.drawable.iconsmall,
            "Notification text", System.currentTimeMillis());
    notification.flags |= Notification.FLAG_ONGOING_EVENT;
    Intent i = new Intent(this, RouteActivity.class);

    i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
            | Intent.FLAG_ACTIVITY_SINGLE_TOP);

    PendingIntent pi = PendingIntent.getActivity(this, 0, i, 0);

    notification.setLatestEventInfo(this, "Notification title",
            "notification message)", pi);
    startForeground(1337, notification);
    startListenLocation();
    return (START_NOT_STICKY);
}

@Override
public void onDestroy() {
    stopListenLocation();
    stopForeground(true);
}

public void startListenLocation() {
    locationManager = (LocationManager) getApplicationContext()
            .getSystemService(Context.LOCATION_SERVICE);
    locationListener = new LocationListener() {
        public void onLocationChanged(Location location) {
            CurrentRouteManager.getSharedManager().updateWithLocation(
                    location);
        }

        public void onStatusChanged(String provider, int status,
                Bundle extras) {

        }

        public void onProviderEnabled(String provider) {

        }

        public void onProviderDisabled(String provider) {

        }

    };
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
            200, locationListener);
    locationManager.requestLocationUpdates(
            LocationManager.NETWORK_PROVIDER, 0, 200, locationListener);
}

public void stopListenLocation() {
        locationManager.removeUpdates(locationListener);
}

If I kill the application and then relaunch it by the service it will call onStartCommand(); again. Also it seems that I lost the link with the location listener, when i'll destroy the service after relaunching it, the notification icon disapear but not the GPS icon.

Edit: Here is the interesting part of my Manifest file The part about the actvity from where the service is started

    <activity
        android:name="com.wayzup.activity.RouteActivity"
        android:screenOrientation="portrait"
        android:launchMode="singleTop" >
    </activity>

And the part about my service

  <service android:name="com.wayzup.services.LocalisationService" >
        </service>

来源：https://stackoverflow.com/questions/12564620/android-foreground-service-lose-context

标签

java

android

service

multitasking

foreground