2014-10-09 12 views
2

我正在使用GWT(版本2.61)和gwt-maps(版本3.8.0)嘗試顯示Google地圖GWT。GWT Google地圖:setCenter:不是LatLng或LatLngLiteral:屬性lat:不是數字

基礎知識似乎工作,但現在我試圖運行gwt-maps zip附帶的CitySimple示例。 Here它是直接JavaScript,但我試圖通過GWT來完成。

然而,當我運行示例,我在啓動時出現以下錯誤:

com.google.gwt.core.client.JavaScriptException: (InvalidValueError) @com.google.maps.gwt.client.Circle::create(Lcom/google/maps/gwt/client/CircleOptions;)([JavaScript object(17)]): setCenter: not a LatLng or LatLngLiteral: in property lat: not a number 
    at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:249) 
    at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136) 
    at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:576) 
    at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:284) 
    at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91) 
    at com.google.maps.gwt.client.Circle$.create(Circle.java) 
    at com.test.client.GwtTest.renderMap(GwtTest.java:80) 

的地圖上顯示了,但沒有一個城市圈的出現。它似乎認爲我的LatLng類型中的緯度值不是一個數字,這在GWT中是不可能的,因爲Java將只有取雙倍值。

這裏是GWT代碼我運行:

package com.test.client; 

import java.util.HashMap; 

import com.google.gwt.ajaxloader.client.AjaxLoader; 
import com.google.gwt.ajaxloader.client.AjaxLoader.AjaxLoaderOptions; 
import com.google.gwt.core.client.EntryPoint; 
import com.google.gwt.dom.client.Document; 
import com.google.maps.gwt.client.Circle; 
import com.google.maps.gwt.client.CircleOptions; 
import com.google.maps.gwt.client.GoogleMap; 
import com.google.maps.gwt.client.LatLng; 
import com.google.maps.gwt.client.MapOptions; 
import com.google.maps.gwt.client.MapTypeId; 

public class GwtTest implements EntryPoint { 

    static class City { 
     LatLng center; 
     Long population; 

     City(LatLng center, Long population) { 
      this.center = center; 
      this.population = population; 
     } 
    } 

    private static java.util.Map<String, City> citymap = new HashMap<String, City>(); 
    static { 
     citymap.put("Chicago", new City(LatLng.create(41.878113, -87.629798), 2842518L)); 
     citymap.put("New York", new City(LatLng.create(40.714352, -74.005973), 8143197L)); 
     citymap.put("Los Angeles", new City(LatLng.create(34.052234, -118.243684), 3844829L)); 
    } 

    @Override 
    public void onModuleLoad() { 
     AjaxLoaderOptions options = AjaxLoaderOptions.newInstance(); 
     options.setOtherParms("sensor=false"); 
     Runnable callback = new Runnable() { 
      public void run() { 
       renderMap(); 
      } 
     }; 
     AjaxLoader.loadApi("maps", "3", callback, options); 
    } 

    public static void renderMap() { 
     MapOptions mapOpts = MapOptions.create(); 
     mapOpts.setZoom(4); 
     mapOpts.setCenter(LatLng.create(37.09024, -95.712891)); 
     mapOpts.setMapTypeId(MapTypeId.TERRAIN); 
     GoogleMap map = GoogleMap.create(Document.get().getElementById("map_canvas"), mapOpts); 

     for (String cityName : citymap.keySet()) { 

      System.out.println("City: " + cityName); 

      City city = citymap.get(cityName); 

      // Construct the circle for each value in citymap. Scale population by 20. 
      CircleOptions populationOptions = CircleOptions.create(); 
      populationOptions.setStrokeColor("#ff0000"); 
      populationOptions.setStrokeOpacity(0.8); 
      populationOptions.setStrokeWeight(2); 
      populationOptions.setFillColor("#ff0000"); 
      populationOptions.setFillOpacity(0.35); 
      populationOptions.setMap(map); 

      System.out.println("Lat: " + city.center.lat()); 
      System.out.println("Lng: " + city.center.lng()); 

      populationOptions.setCenter(city.center); 

      populationOptions.setRadius(city.population/20); 
      Circle.create(populationOptions); 
     } 
    } 
} 

正如你可以看到,所有的經緯度值對他們的拉特和LNGS數字,所以這個錯誤沒有任何意義,我。

爲了完整起見,這裏是我的html文件:

<!doctype html> 
<html> 
<head> 
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">            
    <link type="text/css" rel="stylesheet" href="GwtTest.css">        
    <title>GWT Test</title> 
    <script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script> 
    <script type="text/javascript" language="javascript" 
     src="gwttest/gwttest.nocache.js"></script> 
</head> 
<body> 
    <p>Testing</p> 
    <div style="width:500px; height:500px"> 
     <div id="map_canvas" style="width: 100%; height: 100%;">Map is loading...</div> 
    </div> 
</body> 
</html> 

,這裏是我的GWT模塊XML文件:

<?xml version="1.0" encoding="UTF-8"?> 
<!-- 
    When updating your version of GWT, you should also update this DTD reference, 
    so that your app can take advantage of the latest GWT module capabilities. 
--> 
<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 2.6.1//EN" 
    "file:///C:/Users/kworkman/Desktop/gwt-2.6.1/gwt-module.dtd"> 
<module rename-to='gwttest'> 
    <!-- Inherit the core Web Toolkit stuff.      --> 
    <inherits name='com.google.gwt.user.User'/> 
    <inherits name="com.google.maps.gwt.GoogleMaps" /> 
    <inherits name="com.google.gwt.ajaxloader.AjaxLoader" /> 

    <!-- Inherit the default GWT style sheet. You can change  --> 
    <!-- the theme of your GWT application by uncommenting   --> 
    <!-- any one of the following lines.       --> 
    <inherits name='com.google.gwt.user.theme.clean.Clean'/> 
    <!-- <inherits name='com.google.gwt.user.theme.standard.Standard'/> --> 
    <!-- <inherits name='com.google.gwt.user.theme.chrome.Chrome'/> --> 
    <!-- <inherits name='com.google.gwt.user.theme.dark.Dark'/>  --> 

    <!-- Other module inherits          --> 

    <!-- Specify the app entry point class.       --> 
    <entry-point class='com.test.client.GwtTest'/> 

    <!-- Specify the paths for translatable code     --> 
    <source path='client'/> 
    <source path='shared'/> 

    <!-- allow Super Dev Mode --> 
    <add-linker name="xsiframe"/> 
</module> 

任何人都可以看到什麼我做錯了嗎?我還是GWT的全新人物,所以如果我在做一些愚蠢的事情時我不會感到震驚,但是這個錯誤似乎與代碼直接矛盾,所以我有點不知所措。

我已經使用了這個錯誤,但是我看到的每個問題都是由人們通過字符串而不是數字傳遞給LatLng類型造成的,而我並沒有這樣做。

+1

您可以下載地圖api兩次:一次在您的html文件(

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