Question

我刚刚编写了一些代码来为地图上的所有标记设置onclick监听器（我想在点击它时导航到标记）。然而，这种方法似乎并没有起作用 - 实际上我在调试中弹出了几个Toast，而且他们似乎也没有打印。我会很感激我对失踪的一些看法......我只是在onCreate（）中调用navigateToMarkers。

//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，它应该有效。

使用哪个osmdroid版本？

调试时，您能否检查到达该行：

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

单击OSMdroid Android时导航到Marker

1 个答案: