"alternatives=true" 无法在 Google 方向工作 API

Question

我正在使用 Google 的方向 API 绘制源和目的地之间的行驶路径。我想显示多条替代路线，所以我传递了参数 alternatives=true 在 URL 字符串中。但它不显示任何额外的路径，而只显示一个。我的 URL 代码：

Private String getDirectionsUrl(LatLng origin,LatLng dest)
{
    // Origin of route
    String str_origin = "origin="+origin.latitude+","+origin.longitude;

    // Destination of route
    String str_dest = "destination="+dest.latitude+","+dest.longitude;

    // Sensor enabled
    String sensor = "sensor=false";

    //Adding Alternative parameter
    String alternative = "alternatives=true";

    // Building the parameters to the web service
    String parameters = str_origin+"&"+str_dest+"&"+sensor+"&"+alternative;

    // Output format
    String output = "json";

    // Building the url to the web service
    String url = "https://maps.googleapis.com/maps/api/directions/"+output+"?"+parameters;

    return url;
}

Answer 1

alternatives — If set to true, specifies that the Directions service may provide more than one route alternative in the response. Note that providing route alternatives may increase the response time from the server.

你不会总是有替代品！

Source

"alternatives=true" 无法在 Google 方向工作 API

"alternatives=true" not working in Google Direction API

android

google-maps

google-directions-api