Flex读取离线地图CacheMap

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.URLLoader;import flash.net.URLRequest;public class CacheMap extends TiledMapServiceLayer{public var _baseURL:String="";public var _fullextent:String="";public var _initextent:String="";[Bindable]private var xmlList:XMLList;public function CacheMap(){super();}private function iniParam():void{buildTileInfo();setLoaded(true);}private var _tileInfo:TileInfo=new TileInfo();/*读取conf.xml文件*/[Bindable]private var datas:XML=new XML();private var tileCols:Number;private var tileRows:Number;private var tileOriginX:Number;private var tileOriginY:Number;private var lodInfo:Array=[];public function getXml():void{var url:URLRequest=new URLRequest(_baseURL + "/conf.xml");var loader:URLLoader=new URLLoader();loader.addEventListener(Event.COMPLETE, onComplete);loader.load(url);}private function onComplete(event:Event):void{var result:URLLoader=URLLoader(event.target);datas=XML(result.data);tileCols=Number(datas.TileCacheInfo.TileCols);tileRows=Number(datas.TileCacheInfo.TileRows);tileOriginX=Number(datas.TileCacheInfo.TileOrigin.X);tileOriginY=Number(datas.TileCacheInfo.TileOrigin.Y);var lodInfoArr:XMLList=datas.TileCacheInfo.LODInfos.LODInfo;_tileInfo.lods=[];for (var i:int=0; i < lodInfoArr.length(); i++){var xmlObj:XML=lodInfoArr[i];var lodObj:LOD=new LOD(xmlObj.LevelID, xmlObj.Resolution, xmlObj.Scale);_tileInfo.lods.push(lodObj);}iniParam();}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(4326));}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(4326));}override public function get spatialReference():SpatialReference{return new SpatialReference(4326);}override public function get tileInfo():TileInfo{return _tileInfo;}/*override public function get units():String{return "esriDecimalDegrees";}*/override protected function getTileURL(level:Number, row:Number, col:Number):URLRequest{var url:String=_baseURL + "/_alllayers" + "/L" + padString(String(level), 2, "0") + "/R" + padString(row.toString(16), 8, "0") + "/C" + padString(col.toString(16), 8, "0") + ".png";return new URLRequest(url);}private function buildTileInfo():void{_tileInfo.height=tileCols;_tileInfo.width=tileRows;_tileInfo.origin=new MapPoint(tileOriginX, tileOriginY);_tileInfo.spatialReference=new SpatialReference(4326);}private function padString(text:String, size:int, ch:String):String{while (text.length < size){text=ch + text;}return text;}}}