[Android] Google Map ผม Get Location ตำแหน่ง ปัจจุบัน โดยใช้แอนดรอยมาได้แล้วโดย ศึกษาโค้ดจากเว็ป ,,แล้วผมจะเขียนโค้ดยังไงครับ

package androidcode.in.th.GetPosition;

import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.TextView;

public class GetPositionActivity extends Activity {
	
	private double lat;
	private double lon;
	private LocationManager locationManager;
	private TextView txtLat;
	private TextView txtLon;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
      
        txtLat = (TextView)findViewById(R.id.txtLat);
        txtLon = (TextView)findViewById(R.id.txtLon);
        
       
        LocationListener locationListener = new LocationListener(){
        	
      
			public void onLocationChanged(Location location) {
				// TODO Auto-generated method stub
				
			
				lat = location.getLatitude();
		        lon = location.getLongitude();
		        

		        txtLat.setText("Latitude : " + lat);
		        txtLon.setText("Longitude : " + lon);
			}

			public void onProviderDisabled(String provider) {
				// TODO Auto-generated method stub
				
			}

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

			public void onStatusChanged(String provider, int status,
					Bundle extras) {
				// TODO Auto-generated method stub
				
			}
        };
        
        
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        
     Wifi EDGE GPRS 3G
        locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
    }
}