Android location app

/* V0.01
 * 4/10/11 - 2010
 * Just network data location
 *
 */

package com.saltapps.satmap;

import android.app.Activity;
import android.location.Criteria;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

public class Location extends Activity implements LocationListener {    // implement LocationListener, for getting network location data

      LocationManager locationManager;

      TextView tvLat, tvLongi;                      // textviews for location
      String towers;    // used with location manager, to get location from service provider masts

      float lat, longi;         // values for Location (longi, since long is Java keyword)


      @Override
      public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.location);  // lays the activity out according to the main.xml file in the res/layout folder

          locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);   //  get location manager

        tvLat = (TextView) findViewById(R.id.tvLat);            // for displaying latitude and longitude values
        tvLongi = (TextView) findViewById(R.id.tvLongi);

        Criteria crit = new Criteria();
        towers = locationManager.getBestProvider(crit, false);  // gets best data according to criteria. Our criteria is default, so we should get best data
        android.location.Location location = locationManager.getLastKnownLocation(towers);  // gets last known location using network data from masts

        if (location != null) {                     // checks that location information is present
            lat = (float) (location.getLatitude());     // gets latidude
            longi = (float) (location.getLongitude());  // gets longitude

            tvLat.setText("Latitude: " + lat);          // displays latitude
            tvLongi.setText("Longitude: " + longi);     // displays longitude

        } else {
            Toast.makeText(this, "Couldn't get provider", Toast.LENGTH_SHORT).show();   // displays briefly
        }   // if/else

      } // onCreate


      @Override
      public void onResume() {  // actions to carry out upon returning to this activity
        super.onResume();       //
      } // onResume


      @Override
      public void onPause() {   // actions to carry out when activity isn't in focus
        super.onPause();
      } // onPause



    public void onLocationChanged(Location location) {    // Ignore (for now)
        // TODO Auto-generated method stub
    }   // onLocationChanged


    public void onProviderDisabled(String provider) {     // Ignore (for now)
        Toast.makeText(this, "Couldn't get provider", Toast.LENGTH_SHORT).show();
    }   // onProviderDisabled


    public void onProviderEnabled(String provider) {      // Ignore (for now)
        // TODO Auto-generated method stub
    }   // onProviderEnabled


    public void onStatusChanged(String provider, int status, Bundle extras) {     // Ignore (for now)
        // TODO Auto-generated method stub
    }   // onStatusChanged


    public void onLocationChanged(android.location.Location arg0) {
        // TODO Auto-generated method stub

    }   // onLocationChanged


}   // class