如何用java中的waypoints准备google map api请求

Question

GeoApiContext context = new GeoApiContext();
    context.setApiKey("AIzaSyDhhwfZgJv4DCVuX-RDuXLXfoHWL6FIPAw");

    LatLng originLatLng = new LatLng(17.4366668,78.3982614);

    LatLng destinationLatLng = new LatLng(17.42955,78.34171);

    LatLng wayPoints = new LatLng(17.4477, 78.38264);


    DirectionsResult result = DirectionsApi.newRequest(context)
            .origin(originLatLng)
            .destination(destinationLatLng)
            .waypoints("17.44027,78.39431", "17.43149,78.38817")
            .await();

Answer 1

您可以在GitHub上的源代码中轻松找到waypoints的方法：

https://github.com/googlemaps/google-maps-services-java/blob/master/src/main/java/com/google/maps/directionsapirequest.java

从151行开始：

/**
* Specifies a list of waypoints. Waypoints alter a route by routing it through the specified
* location(s). A waypoint is specified as either a latitude/longitude coordinate or as an address
* which will be geocoded. Waypoints are only supported for driving, walking and bicycling
* directions.
*
* <p>For more information on waypoints, see <a href="https://developers.google.com/maps/documentation/directions/#Waypoints">
* Using Waypoints in Routes</a>.
*/
public DirectionsApiRequest waypoints(String... waypoints) {
  if (waypoints == null || waypoints.length == 0) {
    return this;
  } else if (waypoints.length == 1) {
    return param("waypoints", waypoints[0]);
  } else {
    return param("waypoints", (optimizeWaypoints ? "optimize:true|" : "") + join('|', waypoints));
  }
}