How to read a GeoPoint once and then go back to normal view?

Question

I'm totally new to android development, I used osmdroid in creating an app for Android, I want to get a point by clicking on the map and I found this solution :

MapEventsReceiver mReceive = new MapEventsReceiver()
{
    @Override
    public boolean singleTapConfirmedHelper(GeoPoint p) {
        Toast.makeText(getBaseContext(),p.getLatitude() + " - "+p.getLongitude(),Toast.LENGTH_LONG).show();
        GeoPoint point = new GeoPoint(p.getLatitude(),p.getLongitude());
        // This is the line i will explain in problem #2
        Global_point = point;
        return true;
    }

    @Override
    public boolean longPressHelper(GeoPoint p) {
        return false;
    }
};
MapEventsOverlay OverlayEvents = new MapEventsOverlay(mReceive);
mapView.getOverlays().add(OverlayEvents);

by this page, and I put it in Onclick function of a Button.

The problems are:

1- It (point receiving) Won't stop and it will run forever, How can I stop it when a GeoPoint got received?

2- The MapEventsReceiver is an Interface that should implement as it defined, so singleTapConfirmedHelper function should return a Boolean, How can I return the GeoPoint that got received by clicking? I know I can define a Global variable and fill it in singleTapConfirmedHelper-function but I am asking if it is possible to change the Interface-function return value.

Ps: I know i can remove the map overlay by indexing:

mapView.getOverlays().add(0,OverlayEvents);
mapView.getOverlays().remove(0);

but I don't know where should I put it.

Answer 1

You should call some methot from singleTapConfirmedHelper. It's anonymous class so it can call methos of the class where it's created.

MapEventsReceiver mReceive = new MapEventsReceiver() {
    @Override
    public boolean singleTapConfirmedHelper(GeoPoint p) {
        Toast.makeText(getBaseContext(),p.getLatitude() + " - "+p.getLongitude(),Toast.LENGTH_LONG).show();
        onPointSelected(point);
        return true;
    }
//...
}

And later, somewhere in your Activity or Fragment:

private void onPointSelected(GeoPoint p) {
    //do whatever you want with the point. For example: store it in a field
    this.selectedPoint = p;
    //finish interaction => somehow remove or turn of particular overlay
    mapView.getOverlays().remove(0);
}