How do you make Android LocationManager use Cell network and not Wifi network?

Question

I have an android application using LocationManager get the cell network location and not the Wifi location? If I have turned off the Wifi antenna and do the following:

LocationManager lm = (LocationManager) paramContext.getSystemService(Context.LOCATION_SERVICE);
Location location = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

I am always returned the Wifi location and not the cell network location. I want it to return the cell location since I have moved fromthe Wifi location. I tried using a LocationListener but that doesn't seem to help.

This is running on an HTC Evo running Froyo.

Thanks!

Answer 1

Check out this section in the Android Dev Guide: Requesting Location Updates. Basically, you need to register a listener to get location updates, and then you tell Android that you want to get those updates with the network location provider.

// Acquire a reference to the system Location Manager
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

// Define a listener that responds to location updates
LocationListener locationListener = new LocationListener() {
    public void onLocationChanged(Location location) {
      // Called when a new location is found by the network location provider.
      makeUseOfNewLocation(location);
    }

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

    public void onProviderEnabled(String provider) {}

    public void onProviderDisabled(String provider) {}
  };

// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);

You should then be able to get the last known location with getLastKnownLocation() and/or use the onLocationChanged() in the LocationListener.