Android ถามเรื่องการค้นหาสถานที่มาใช้ในการหา Search ต่ำแหน่งบน Google map ครับ

class MapOverlay extends com.google.android.maps.Overlay
{
    public boolean draw(Canvas canvas, MapView mapView, 
    boolean shadow, long when) 
    {
        super.draw(canvas, mapView, shadow);                   

        //---translate the GeoPoint to screen pixels---
        Point screenPts = new Point();
        mapView.getProjection().toPixels(p, screenPts);

        //---add the marker---
        Bitmap bmp = BitmapFactory.decodeResource(
            getResources(), R.drawable.pink);            
        canvas.drawBitmap(bmp, screenPts.x, screenPts.y-32, null);         
        return true;
    }
} 

                List<Address> addresses = geoCoder.getFromLocationName(txtsearch.getText().toString(),5);

                if(addresses.size() > 0)
                {
                     p = new GeoPoint( (int) (addresses.get(0).getLatitude() * 1E6), 
                                      (int) (addresses.get(0).getLongitude() * 1E6));

                       controller.animateTo(p);
                       controller.setZoom(12);

                       MapOverlay mapOverlay = new MapOverlay();
                     List<Overlay> listOfOverlays = map.getOverlays();
                     listOfOverlays.clear();
                     listOfOverlays.add(mapOverlay);

                       map.invalidate();
                       txtsearch.setText("");
                }
                else
                {
                        AlertDialog.Builder adb = new AlertDialog.Builder(GoogleMap.this);
                        adb.setTitle("Google Map");
                        adb.setMessage("Please Provide the Proper Place");
                        adb.setPositiveButton("Close",null);
                        adb.show();
                }