I have some problems with location systems. I have a service that implements locationlistener. I want to get the best location using network when possible, gps if network is not enough accurate (accuracy greater than 300mt). The problem is this. I need location (accurate if possible, inaccuarte otherways) every 5 minutes. I start with a :

    LocationManager lm=(LocationManager)getApplicationContext().getSystemService(LOCATION_SERVICE);
    Criteria criteria = new Criteria();
    criteria.setAccuracy(Criteria.ACCURACY_COARSE);
    criteria.setAltitudeRequired(false);
    criteria.setBearingRequired(false);        
    String provider=lm.getBestProvider(criteria, true);
    if(provider!=null){


    lm.requestLocationUpdates( provider,5*60*1000,0,this);

In "onLocationChanged" i listen to locations and when i get a location with accuracy greater than 300mt, i want to change to gps location system.

If I remove allupdates and then request for gps updates, like this:

lm.removeUpdates((android.location.LocationListener) this);
Criteria criteria = new Criteria();
    criteria.setAccuracy(Criteria.ACCURACY_FINE);
    criteria.setAltitudeRequired(false);
    criteria.setBearingRequired(false);        
    String provider=lm.getBestProvider(criteria, true);
    if(provider!=null){
    lm.requestLocationUpdates( provider,5*60*1000,0,this);
    }

system stops waiting for gpsupdate, and if i'm in a close room it can stay without location updates for hours, ignoring timeupdate indications. Is there a way to tell locationprovider to switch to network if gps is not giving a location in "x" seconds? or how to understand when gps is not localizing?

or if i requestlocationupdates from 2 providers at same time (network and gps), can be a problem?

Any suggestion?