后端计算路线，Here-API 仅在地图上显示指导和路线 [英] Backend Calculated Route,Here-API to just show Guidance and route on Map

问题描述

我有一个完成路线计算的后端服务，我将使用 here-api 在地图上显示计算的路线并开始导航，我可以知道可以用于此目的的 API 吗?

I have a back-end service where the route calculation is done and I will be using here-api to display the calculated route on map and start guidance, Can I know the API which can be used for this purpose ?

我已经通过了，Here-API 我看到的地方

I have gone through, Here-API where I see

1. 我们可以在重写的 onCalculateRouteFinished() 函数上从 RouteResult 创建一个路由.

1. We can create an Route from RouteResult on Overridden onCalculateRouteFinished() function.

我们可以从列表中获取路线数据并创建一个MapObject.

From the list we can get Route data and create a MapObject.

使用此 MapObject 将其添加到地图中.

Using this MapObject add this to the Map.

但这不是我的意图，因为我根本不会有路线数据.

But this is not my intention as I will not be having Route data at all.

使用地理坐标调用哪个 Here-api 以在地图中显示路线.

Which Here-api to call with Geo-Coordinates to display the route b/w them in the map.

推荐答案

一般情况下，无法将路由从后端服务器(使用 HERE Routing API)传输到 HERE Mobile SDK.解决方法是:

In general it is not possible to transfer a route from a back end server (using HERE Routing API) to the HERE Mobile SDK. A workaround solution would be :

1. 从 HERE Routing API 检索路线的形状.
2. 简化此形状以减少坐标数.这里可能有不同的可能性，例如只使用机动的开始、中间、结束坐标而不是整个机动形状)
3. 将简化的形状传递给您的应用

4. 在应用中，使用HERE Mobile SDK函数CoreRouter重构路线.

1. Retrieve the shape of the route from HERE Routing API.
2. Simplify this shape to reduce the number of coordinates. There can be different possibilities here, for e.g use only start,middle,end coordinates of maneuvers instead of the whole maneuver shape )
3. Pass the Simplified shape to you app

4. In the app , reconstruct the route using HERE Mobile SDK function CoreRouter.

calculateRoute(java.util.List<GeoCoordinate> routePoints, RouteOptions routeOptions, Router.Listener<java.util.List<RouteResult>,RoutingError> listener) 

将回调中的路由用于导航用例.

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