单击OSMdroid Android时导航至标记

Question

I've just written some code to set the onclick listeners for all markers on my map (I want to navigate to a marker when I click it). However the method doesn't seem to be working - in fact I popped a few Toasts in for debugging and they don't seem to be printing either. Would appreciate some input on what I'm missing... I just call navigateToMarkers in onCreate().

//method to set onclicks for markers - when you click one, you navigate to it.
private void navigateToMarkers(){
     for(int i=0; i<bookMap.getOverlays().size(); i++){
        if(bookMap.getOverlays().get(i) instanceof Marker){
            ((Marker) bookMap.getOverlays().get(i)).setOnMarkerClickListener(new Marker.OnMarkerClickListener() {
                @Override
                public boolean onMarkerClick(Marker marker, MapView mapView) {
                    DrawRoad drawRoad = new DrawRoad(getCurrentLocation(), marker.getPosition());
                    drawRoad.execute();

                    Toast.makeText(MapActivity.this, "Marker clicked!", Toast.LENGTH_SHORT).show();

                    return true;
                }
            });
        }
    }


}

//we do this in a different thread as it takes some amount of processing power to get route to ucd.
private class DrawRoad extends AsyncTask<Void, Void, Road> {
    GeoPoint startPoint;
    GeoPoint endPoint;

    public DrawRoad(GeoPoint startPoint, GeoPoint endPoint){
        this.startPoint = startPoint;
        this.endPoint = endPoint;
    }

    @Override
    protected Road doInBackground(Void... voids) {
        RoadManager roadManager = new OSRMRoadManager(MapActivity.this);

        ArrayList<GeoPoint> waypoints = new ArrayList<>();
        waypoints.add(startPoint);
        waypoints.add(endPoint);

        Road road = roadManager.getRoad(waypoints);

        return road;
    }

    protected void onPostExecute(Road road){
        updateUIWithRoad(road);
    }
}

Answer 1

Your code is correct, it should work.

Which osmdroid version used?

When debugging, can you check you reach the line:

((Marker) bookMap.getOverlays().get(i)).setOnMarkerClickListener(