实现ArcGIS for flex 加载谷歌地图，同时点击地图，获取该点瓦片的地址(url)，即由瓦片所处的经纬度获取瓦片的url-Achieve ArcGIS for flex load Google Maps, while clicking on the map, to get the point tile address (url), that is, to get the tiles from the tile in which the latitude and longitude ur