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);
