浏览ArcGIS Online服务数据内容

<?xml version="1.0" encoding="utf-8"?>  
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"  
               xmlns:s="library://ns.adobe.com/flex/spark"  
               xmlns:mx="library://ns.adobe.com/flex/mx"  
               xmlns:esri="http://www.esri.com/2008/ags"  
               pageTitle="浏览ArcGIS Online服务内容">  
    <!--  
    Description:  
    实例应用程序来自ArcGIS Online上不同的map services显示，每一个service服务都能查找更多的内容  
    Sample application to display different map services from ArcGIS Online,  
    and to find out more about each service.  
  
    Documentation:  
    https://developers.arcgis.com/en/flex/api-reference/com/esri/ags/layers/ArcGISTiledMapServiceLayer.html  
    https://developers.arcgis.com/en/flex/api-reference/com/esri/ags/layers/ArcGISTiledMapServiceLayer.html#tileInfo  
    https://developers.arcgis.com/en/flex/api-reference/com/esri/ags/layers/supportClasses/LOD.html  
  
    http://resources.arcgis.com/en/help/main/10.1/#/What_is_ArcGIS_Online/01w100000045000000/  
    -->  
  
    <fx:Script>  
        <![CDATA[ 
            import mx.controls.Alert; 
 
            protected function infoImage_clickHandler(event:MouseEvent):void 
            { 
               Alert.show("在ArcGIS Online数据缓存地图服务上，滑块的级别是 " + tiled.tileInfo.lods.length 
                           + " " + tiled.tileInfo.height + " x " + tiled.tileInfo.width 
                           + " " + tiled.tileInfo.format // + " tiles.\n\n" + tiled.description 
                           + "\n\n空间参考是 " + myMap.spatialReference.wkid + ".");  
            } 
        ]]>  
    </fx:Script>  
  
    <s:controlBarLayout>  
        <s:VerticalLayout gap="10"  
                          paddingBottom="7"  
                          paddingLeft="10"  
                          paddingRight="10"  
                          paddingTop="7"/>  
    </s:controlBarLayout>  
    <s:controlBarContent>  
        <s:RichText width="100%">  
            这个示例展示了来世ArcGIS Online上不同的map service，点击图形，查找有关每一个service的更多信息  
        </s:RichText>  
        <s:Button bottom="4"  
                  click="navigateToURL(new URLRequest('http://resources.arcgis.com/en/help/main/10.1/#/What_is_ArcGIS_Online/01w100000045000000/'))"  
                  fontWeight="bold"  
                  horizontalCenter="0"  
                  label="了解更多关于ArcGIS Online"/>  
    </s:controlBarContent>  
  
    <esri:Map id="myMap" wrapAround180="true">  
        <esri:ArcGISTiledMapServiceLayer id="tiled"  
                                         load="myMap.lods = tiled.tileInfo.lods"  
                                         url="http://server.arcgisonline.com/ArcGIS/rest/services/{servicePicker.selectedItem.toString()}/MapServer"/>  
    </esri:Map>  
    <s:Panel height="75"  
             top="15"  
             fontWeight="bold"  
             horizontalCenter="0"  
             title="选择一个ArcGIS Online服务">  
        <s:layout>  
            <s:HorizontalLayout horizontalAlign="center"  
                                paddingLeft="5"  
                                verticalAlign="middle"/>  
        </s:layout>  
        <s:DropDownList id="servicePicker"  
                        width="225"  
                        cornerRadius="0"  
                        requireSelection="true"  
                        selectedIndex="1">  
            <s:ArrayList>  
                <fx:String>Ocean_Basemap</fx:String>  
                <fx:String>NatGeo_World_Map</fx:String>  
                <fx:String>World_Imagery</fx:String>  
                <fx:String>World_Street_Map</fx:String>  
                <fx:String>World_Topo_Map</fx:String>  
                <fx:String>World_Shaded_Relief</fx:String>  
                <fx:String>Specialty/World_Navigation_Charts</fx:String>  
            </s:ArrayList>  
        </s:DropDownList>  
        <mx:Image id="infoImage"  
                  click="infoImage_clickHandler(event)"  
                  source="@Embed(source='assets/info_bubble.png')"/>  
    </s:Panel>  
  
</s:Application>

弹出框的内容，可以直接访问WebService地址查看

官方原文：https://developers.arcgis.com/flex/sample-code/arcgis-online-data.htm

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