Cancelling an already open toast in Android

I'm currently starting to develop Android applications and I've been following up a this tutorial on how to use and improve the Google maps application.

I've managed to show up on screen the map, on touch I get the address of a location (via Reverse Geocoding) with the showing of a Toast. But here is my problem - when you click a number of consecutive times over the map you will get all the toasts one after other and each of them will take his time (in my case - Toast.LENGTH_LONG) to disappear. I want to make the application automatically close the older toast and show a new toast with the new address clicked.

In other resources I found I should use the toast.cancel() method for this purpose, but I experience trouble using it - I have already overrided the onTouchEvent - how can I detect there is a new touch over the map while the toast is showing? Or maybe you would suggest me a better way of hiding the already open toast?

I've tried to make my Toast address a global one, but it wasn't working also.

Here is my code for the application:

@Override
public boolean onTouchEvent(MotionEvent event, MapView mapView) {   
    //---when user lifts his finger---
    if (event.getAction() == 1) {                
        GeoPoint p2 = mapView.getProjection().fromPixels((int) event.getX(), (int) event.getY());
        Geocoder geoCoder = new Geocoder(getBaseContext(), Locale.getDefault());
        try {
            List<Address> addresses = geoCoder.getFromLocation(p2.getLatitudeE6() / 1E6,
                    p2.getLongitudeE6() / 1E6, 1);
            String add = " ";
            if (addresses.size() > 0) 
                for (int i=0; i<addresses.get(0).getMaxAddressLineIndex();i++)
                    add += addresses.get(0).getAddressLine(i) + "\n";
            Toast address;
            address = Toast.makeText(getBaseContext(), add, Toast.LENGTH_LONG);
            address.show();                     
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        return true;
    }
    return false;
}