ArcGIS api for flex读取下载到本机的google瓦片地图 web墨卡托

GoogeleLayer.as

/**
 * @Description:
 * @Type:组件类
 * @Copyright: Copyright 2013
 * @Company:
 * @Author : NEIL
 * @Date:2013-10-21
 * @Version 1.0
 */
package com
{
	import com.esri.ags.SpatialReference;
	import com.esri.ags.geometry.Extent;
	import com.esri.ags.geometry.MapPoint;
	import com.esri.ags.layers.TiledMapServiceLayer;
	import com.esri.ags.layers.supportClasses.LOD;
	import com.esri.ags.layers.supportClasses.TileInfo;

	import flash.events.Event;
	import flash.net.URLRequest;

	public class GoogeleLayer extends TiledMapServiceLayer
	{
		public var _fullextent:String="";
		public var _initextent:String="";
		[Bindable]
		public var _tileInfo:TileInfo=new TileInfo();
		private var _baseURL:String="";

		public function GoogeleLayer()
		{
			super();
		}

		public function getXml():void
		{
			buildTileInfo();
			setLoaded(true);
		}

		override public function get fullExtent():Extent
		{
			var fullExtentArr:Array=_fullextent.split(",");
			return new Extent(Number(fullExtentArr[0]),Number(fullExtentArr[1]),Number(fullExtentArr[2]),Number(fullExtentArr[3]),new SpatialReference(102113));
		}

		override public function get initialExtent():Extent
		{
			var initExtentArr:Array=_initextent.split(",");
			return new Extent(Number(initExtentArr[0]),Number(initExtentArr[1]),Number(initExtentArr[2]),Number(initExtentArr[3]),new SpatialReference(102113));
		}

		override public function get spatialReference():SpatialReference
		{
			return new SpatialReference(102113);
		}

		override public function get tileInfo():TileInfo
		{
			return _tileInfo;
		}

		override protected function getTileURL(level:Number,row:Number,col:Number):URLRequest
		{
			var urlMap:String=baseURL + "/tiles" + "/" + String(level) + "/" + col.toString() + "/" + row.toString() + ".png";
			return new URLRequest(urlMap);
		}

		public function get baseURL():String
		{
			return _baseURL;
		}

		public function set baseURL(value:String):void
		{
			_baseURL=value;
		}

		public function buildTileInfo():void
		{
			_tileInfo.height=256;
			_tileInfo.width=256;
			_tileInfo.origin=new MapPoint(-20037508.342787001,20037508.342787001);
			_tileInfo.spatialReference=new SpatialReference(102113);
			_tileInfo.lods=[new LOD(10,152.874056570411,577790.554289),new LOD(11,76.4370282850732,288895.277144),new LOD(12,38.2185141425366,144447.638572),new LOD(13,19.1092570712683,72223.819286),new LOD(14,9.55462853563415,36111.909643),new LOD(15,4.77731426794937,18055.954822),];
		}


	}
}