Google Map Directions.load失败，返回SERVER_ERROR

I'm trying out google directions from the gwt-map library. Apart from assigning RootPanel in onModuleLoad(), I have copied most of the codes from SimpleDirectionsDemo.java.

我正在尝试从gwt-map库中获取google指令。除了在onModuleLoad()中分配RootPanel之外,我还复制了SimpleDirectionsDemo.java中的大部分代码。

I get a "Failed to load directions: SERVER_ERROR" message callback after running

运行后,我收到“无法加载路线:SERVER_ERROR”消息回调

Directions.load(query, opts, new DirectionsCallback() {

  public void onFailure(int statusCode) {
    Window.alert("Failed to load directions: Status "
        + StatusCodes.getName(statusCode) + " " + statusCode);
  }

  public void onSuccess(DirectionResults result) {
    GWT.log("Successfully loaded directions.", null);
  }
});

API of GWT-Map Library: http://gwt-google-apis.googlecode.com/svn/javadoc/maps/1.1/index.html

GWT-Map Library的API:http://gwt-google-apis.googlecode.com/svn/javadoc/maps/1.1/index.html
The working example can be found at http://gwt.google.com/samples/hellomaps-1.1.0/HelloMaps.html#Simple%20Directions

可以在http://gwt.google.com/samples/hellomaps-1.1.0/HelloMaps.html#Simple%20Directions找到该工作示例
while the files can be found at
http://code.google.com/p/gwt-google-apis/source/browse/#svn%2Ftrunk%2Fmaps%2Fsamples%2Fhellomaps%2Fsrc%2Fcom%2Fgoogle%2Fgwt%2Fmaps%2Fsample%2Fhellomaps%2Fclient%253Fstate%253Dclosed

文件可以在http://code.google.com/p/gwt-google-apis/source/browse/#svn%2Ftrunk%2Fmaps%2Fsamples%2Fhellomaps%2Fsrc%2Fcom%2Fgoogle%2Fgwt%2Fmaps%找到2Fsample%2Fhellomaps%2Fclient%253Fstate%253Dclosed

and here's a snippet of the working code thats found in the trunk..

这是一个在主干中找到的工作代码的片段..

 public SimpleDirectionsDemo() {
    final Grid grid = new Grid(1, 2);
    grid.setWidth("100%");
    grid.getCellFormatter().setWidth(0, 0, "500px");
    grid.getCellFormatter().setVerticalAlignment(0, 0,
        HasVerticalAlignment.ALIGN_TOP);
    grid.getCellFormatter().setWidth(0, 1, "300px");
    grid.getCellFormatter().setVerticalAlignment(0, 1,
        HasVerticalAlignment.ALIGN_TOP);
    map = new MapWidget(LatLng.newInstance(42.351505, -71.094455), 15);
    map.setHeight("480px");
    grid.setWidget(0, 0, map);
    DirectionsPanel directionsPanel = new DirectionsPanel();
    grid.setWidget(0, 1, directionsPanel);
    directionsPanel.setSize("100%", "100%");

    initWidget(grid);

    DirectionQueryOptions opts = new DirectionQueryOptions(map, directionsPanel);
    String query = "from: 500 Memorial Dr, Cambridge, MA to: 4 Yawkey Way, Boston, MA";
    Directions.load(query, opts, new DirectionsCallback() {

      public void onFailure(int statusCode) {
        Window.alert("Failed to load directions: Status "
            + StatusCodes.getName(statusCode) + " " + statusCode);
      }

      public void onSuccess(DirectionResults result) {
        GWT.log("Successfully loaded directions.", null);
      }
    });
  }

Anyone experienced with either google maps or gwt-map knows why does the load fail ?

任何有谷歌地图或gwt-map经验的人都知道为什么负载会失败?

1 个解决方案

#1

Realized on my end, I decided to leave out the DirectionsPanel.

在我结束时意识到,我决定省略DirectionsPanel。

My original code for DirectionQueryOptions was

我对DirectionQueryOptions的原始代码是

DirectionQueryOptions opts = new DirectionQueryOptions(map);

which apparently causes SERVER_ERROR Based on the API at http://gwt-google-apis.googlecode.com/svn/javadoc/maps/1.1/index.html

显然导致SERVER_ERROR基于http://gwt-google-apis.googlecode.com/svn/javadoc/maps/1.1/index.html上的API

There's an error with the api since it gives a constructor with just map as a parameter. DirectionsPanel is mandatory to be declared if you're going to use gwt-map library

api有一个错误,因为它给构造函数只有map作为参数。如果您要使用gwt-map库,则必须声明DirectionsPanel

Correct code:

DirectionQueryOptions opts = new DirectionQueryOptions(map, directionsPanel);

#1