To get geolocation information, we need to implement LocationListener

public class GPSTesting extends ListActivity implements  LocationListener {

Then, the location information will be delivered by these callback methods

in onCreate method, we can initialize locationManager and bestProvider

We can extract latitude and longitude data from the Location object just like this

mLongitude = location.getLongitude();
mLatitude = location.getLatitude();

I used latitude and longitude data to retrieve nearby twitter users.

By the way, New York is really hot! (…What?)