使用谷歌地图路线API 。您需要请求指示通过HTTP。您可以直接从Android或通过自己的服务器做到这一点。

Use the Google Maps Directions API. You'll need to request the directions over HTTP. You can do this directly from Android, or via your own server.

例如，方向从Montreal多伦多：

GET http://maps.googleapis.com/maps/api/directions/json?origin=Toronto&destination=Montreal&sensor=false

您最终会得到一些JSON。在路线[]腿[]距离，你会得到这样一个对象：

You'll end up with some JSON. In routes[].legs[].distance, you'll get an object like this:

     "legs" : [
        {
           "distance" : {
              "text" : "542 km",
              "value" : 542389
           },

您也可以直接从响应对象获取的折线的信息。

You can also get the polyline information directly from the response object.