android – 用于osmdroid错误的RoadManager

我在这里遵循 https://code.google.com/p/osmbonuspack/wiki/Tutorial_1教程,但我遇到一个错误,它没有正确显示正确的路由.它只显示从A点到B点的直线.

我想要实现的是从这些点显示正确的路线.我猜错误是它无法识别任何节点.

一个类似的问题也被问到,如果我没有很好地解释我的问题,我假设我有同样的问题.

类似的问题可以在这里找到：OSMDroid Routing problems when following a tutorial

这是使用RoadManager的代码的一部分

这是代码的一部分.

try {

                //get current longlat
                gpsLocator.getLocation(); 
                cur_loc_lat =gpsLocator.getLatitude();
                cur_loc_long =gpsLocator.getLongitude(); 

            } catch (Exception e) {
                // Todo: handle exception
            }

            //--- Create Another Overlay for multi marker
            anotherOverlayItemArray = new ArrayList<OverlayItem>();
            anotherOverlayItemArray.add(new OverlayItem(
                    "UST","UST",new GeoPoint( testlat,testlong))); 

            //--- Create Another Overlay for multi marker 
            anotherOverlayItemArray.add(new OverlayItem(
                    locDefine[0],new GeoPoint( sel_latitude,sel_longitude))); 


            ItemizedIconOverlay<OverlayItem> anotherItemizedIconOverlay 
             = new ItemizedIconOverlay<OverlayItem>(
               TomWalks.this,anotherOverlayItemArray,myOnItemGestureListener);

            myOpenMapView.getoverlays().add(anotherItemizedIconOverlay);
            //---

            //Add Scale Bar
            ScaleBarOverlay myScaleBarOverlay = new ScaleBarOverlay(TomWalks.this);
            myOpenMapView.getoverlays().add(myScaleBarOverlay);


           try {


               //1 Routing via road manager
                RoadManager roadManager = new mapquestRoadManager();
                roadManager.addRequestOption("routeType=pedestrian"); 
                /*
                roadManager.addRequestOption("units=m"); 
                roadManager.addRequestOption("narrativeType=text"); 
                roadManager.addRequestOption("shapeFormat=raw"); 
                roadManager.addRequestOption("direction=0");  
                */
                //Then,retrieve the road between your start and end point:
                ArrayList<GeoPoint> waypoints = new ArrayList<GeoPoint>();
                waypoints.add(new GeoPoint(testlat,testlong));
                waypoints.add(new GeoPoint(sel_latitude,sel_longitude)); //end point

                Road road = roadManager.getRoad(waypoints);


                // then,build an overlay with the route shape:
                PathOverlay roadOverlay = RoadManager.buildroadOverlay(road,myOpenMapView.getContext());
                roadOverlay.setColor(Color.GREEN);


                //Add Route Overlays into map
                myOpenMapView.getoverlays().add(roadOverlay);
                myOpenMapView.invalidate();//refesh map


                final ArrayList<ExtendedOverlayItem> roadItems = 
                          new ArrayList<ExtendedOverlayItem>();
                itemizedoverlayWithBubble<ExtendedOverlayItem> roadNodes = 
                          new itemizedoverlayWithBubble<ExtendedOverlayItem>(TomWalks.this,roadItems,myOpenMapView);



                myOpenMapView.getoverlays().add(roadNodes);
                myOpenMapView.invalidate();//refesh map



                int nodesize=road.mNodes.size();
                double length = road.mLength;


                Drawable    marker = getResources().getDrawable(R.drawable.marker_node);

                Toast.makeText(TomWalks.this," distance : " + length + " Nodes : "+nodesize,Toast.LENGTH_SHORT).show();

                  for (int i=0; i<road.mNodes.size(); i++)
                  {
                          RoadNode node = road.mNodes.get(i);
                          ExtendedOverlayItem nodeMarker = new ExtendedOverlayItem("Step "+i,"",node.mLocation,TomWalks.this);
                          nodeMarker.setMarkerHotspot(OverlayItem.HotspotPlace.CENTER);
                          nodeMarker.setMarker(marker);
                          roadNodes.addItem(nodeMarker);

                          nodeMarker.setDescription(node.mInstructions);
                          nodeMarker.setSubDescription(road.getLengthDurationText(node.mLength,node.mDuration));
                          Drawable icon = getResources().getDrawable(R.drawable.marker_node);
                          nodeMarker.setimage(icon);

                  }//end for

                  myOpenMapView.getoverlays().add(roadNodes);
                  myOpenMapView.invalidate();//refesh map


            } catch (Exception e) {
                // Todo: handle exception


                Toast.makeText(TomWalks.this,e.getMessage(),Toast.LENGTH_SHORT).show();


            } 

            myMapController.setCenter(new GeoPoint( sel_latitude,sel_longitude));


        } catch (Exception e) {
            // Todo: handle exception
        }           
    }

}

}//===================================================================================================

解决方法

我认为在这种情况下使用AsyncTasks会更好：

/**
     * Async task to get the road in a separate thread. 
     */
    private class UpdateRoadTask extends AsyncTask<Object,Void,Road> {

        protected Road doInBackground(Object... params) {
            @SuppressWarnings("unchecked")
            ArrayList<GeoPoint> waypoints = (ArrayList<GeoPoint>)params[0];
            RoadManager roadManager = new OSRMRoadManager();


            return roadManager.getRoad(waypoints);
                                                        }
         @Override
        protected void onPostExecute(Road result) {
            road = result;
             // showing distance and duration of the road 
            Toast.makeText(getActivity(),"distance="+road.mLength,Toast.LENGTH_LONG).show();
            Toast.makeText(getActivity(),"durée="+road.mDuration,Toast.LENGTH_LONG).show(); 

            if(road.mStatus != Road.STATUS_OK)
            Toast.makeText(getActivity(),"Error when loading the road - status="+road.mStatus,Toast.LENGTH_SHORT).show();
            polyline roadOverlay = RoadManager.buildroadOverlay(road,getActivity());

            map.getoverlays().add(roadOverlay);
            map.invalidate();
            //updateUIWithRoad(result);
                                                    }
    }

然后将其称为new UpdateRoadTask().execute(waypoints);