java - 单击时导航到标记 OSMdroid Android

Question

我刚刚编写了一些代码来为 map 上的所有标记设置 onclick 监听器(我想在单击标记时导航到该标记)。然而，该方法似乎不起作用 - 事实上，我弹出了一些 Toast 进行调试，但它们似乎也没有打印。希望能对我所缺少的内容提供一些意见...我只是在 onCreate() 中调用 navigatorToMarkers。

//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

您的代码是正确的，它应该可以工作。

使用哪个 osmdroid 版本？

调试时，您能否检查一下是否到达了以下行:

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