用于osmdroid错误的RoadManager

Question

我在这里按照教程https://code.google.com/p/osmbonuspack/wiki/Tutorial_1但我遇到了一个错误,它没有正确显示正确的路线.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.

还有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跟踪教程时的路由问题

以下是使用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], "UST", 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
        }           
    }

}

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

Answer 1

让我们试着为这个非常频繁的问题提供一个完整的答案.

基本上,当你得到"直线"时,这意味着RoadManager出错了.

所以,首先,在你的代码中,你应该检查getRoad的结果,这样:

if (road.mStatus != Road.STATUS_OK){
  //handle error... warn the user, etc. 
}

现在,这个错误来自哪里？=>您必须在logcat中搜索.您应该找到已发送的完整URL,并且可能找到有关错误的堆栈跟踪.

我强烈建议您在浏览器中复制/粘贴此完整URL,并检查结果.

以下是典型错误,通过降低概率:

1)你没有仔细阅读Tutorial_0开头的"重要说明" ,而你正试图在主线程中进行网络调用,SDK> = 3.0.=>阅读"重要提示".

2)您要求的路线是不可能的(真的不可能,或者由于奇怪的位置,或者因为设置了不支持的选项).=>通过在Web浏览器中复制/粘贴完整URL并查看答案,可以轻松检查.

3)您的设备没有网络连接.

4)路由服务改变了它的API(这发生了,不止一次......).=>可以通过在浏览器中复制/粘贴完整的URL进行检查.在这种情况下,在OSMBonusPack项目中引发一个问题,以便我们尽快考虑它.

5)路由服务已关闭.=>通过在浏览器中复制/粘贴完整的URL轻松检查.