RoadManager for osmdroid 错误 [英] RoadManager for osmdroid error
问题描述
我在这里学习教程 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.它只是显示了从 A 点到 B 点的直线.
I am following a tutorial here https://code.google.com/p/osmbonuspack/wiki/Tutorial_1 but I have encountered an error that it doesn't show the correct route correctly. It just shows a straight line from Point A to Point B.
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要通过的节点.
What I want to achieve is to show the correct route from these points. I'm guessing the error is that it doesn't recognize any nodes to go through.
也有人问了一个类似的问题，如果我没有很好地解释我的问题，我假设我有同样的问题.
A similar question has been also asked and I am assuming I have the same problem if I haven't explained my question well.
可以在这里找到类似的问题:OSMDroid Routing questions when following a tutorial
Similar question can be found here: OSMDroid Routing problems when following a tutorial
这是我使用 RoadManager 的代码的一部分
Here is a part of my code using RoadManager
这是部分代码.
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
}
}
}
}//===================================================================================================
推荐答案
让我们尝试为这个非常常见的问题提供一个完整的答案.
Let's try to provide a complete answer to this quite frequent question.
基本上，当你得到直线"时，这意味着 RoadManager 出错了.
Basically, when you get the "straight line", it means that the RoadManager got an error.
所以，首先，在你的代码中，你应该检查getRoad的结果，这样:
So, first of all, in your code, you should check the result of getRoad, this way:
if (road.mStatus != Road.STATUS_OK){
//handle error... warn the user, etc.
}
现在，这个错误来自哪里?=> 你必须在 logcat 中搜索.您应该找到已发送的完整 url，可能还有关于错误的堆栈跟踪.
Now, where this error is coming from? => You must search in the logcat. You should find the full url that has been sent, and probably a stacktrace about the error.
我强烈建议您在浏览器中复制/粘贴此完整网址，然后检查结果.
I strongly recommend that you copy/paste this full url in a browser , and check the result.
以下是典型的错误，按概率递减:
Here are the typical errors, by decreasing probability:
1) 您没有仔细阅读Tutorial_0，并且您正尝试在主线程中使用 SDK >= 3.0 进行网络调用.=> 阅读此重要提示".
1) You didnt' read carefully the "Important note" at the beginning of the Tutorial_0, and you are trying to do a Network call in the main thread, with an SDK >= 3.0. => Read this "Important note".
2) 你要求的路线是不可能的(真的不可能，或者因为奇怪的位置，或者因为设置了不受支持的选项).=> 这很容易通过在网络浏览器中复制/粘贴完整的 url 并查看答案来检查.
2) You asked for a route that is not possible (really not possible, or because of weird positions, or because of setting unsupported options). => This is easy to check by copy/pasting the full url in a web browser, and looking at the answer.
3) 您的设备没有网络连接.
3) Your device has no network connectivity.
4) 路由服务更改了它的 API(这种情况发生了不止一次……).=> 可以通过在浏览器中复制/粘贴完整的 url 来检查.在这种情况下，请在 OSMBonusPack 项目中提出问题，以便我们尽快将其考虑在内.
4) The routing service changed its API (this happened, more than once...). => Could be checked by copy/pasting the full url in a browser. In this case, raise an Issue in OSMBonusPack project, so that we can take it into account ASAP.
5) 路由服务已关闭.=> 通过在浏览器中复制/粘贴完整的 url 很容易检查.
5) The routing service is down. => Easy to check by copy/pasting the full url in a browser.
这篇关于RoadManager for osmdroid 错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
