重写TiledServiceLayer实现Arcgis访问Mapabc地图服务

package com.baixin.main;
/**
*
* @ClassName:   MapAbcToArcGISTLayer
* @Description:    ArcGIS访问MapAbc地图服务
* @author：        Zrd
* @version：       v1.0
* @Date：          2012-8-11 上午10:18:17
*/
import java.util.HashMap;
import com.esri.android.map.TiledServiceLayer;
import com.esri.core.geometry.Envelope;
import com.esri.core.geometry.Point;
import com.esri.core.geometry.SpatialReference;
import com.esri.core.internal.b.a.a;

public class MapAbcToArcGISTLayer extends TiledServiceLayer {
private int WKID = 2436;
private String layername = null;
private String layerurl = null;
private static final double[] c = { 896.0859375, 548.04296875,
224.02148437, 112.0107421875, 56.00537109375, 28.002685546875,
14.0013427734375, 7.00067138671875, 3.50033569335937,
1.75016784667968, 0.875083923339843, 0.4375419616699215,
0.2187709808349608 };
private static final double[] d = { 3386781.496062992D, 1693390.748031496D,
846695.374015748D, 423347.687007874D, 211673.843503937D,
105836.92175196858D, 52918.46087598425D, 26459.23043799213D,
13229.61521899604D, 6614.807609498003D, 3307.403804749013D,
1653.701902374507D, 826.8509511872533D };
private static final double[] res = { 0.0011159643937610616,
0.0032319287875221232, 0.0044638575750442465, 0.008927715150088493,
0.017855430300176986, 0.03571086060035397, 0.07142172120070794,
0.1428434424014159, 0.2856868848028318, 0.5713737696056635,
1.143547539211327, 2.287295078422654, 4.574490156845308 };
public static final int initWithDpi = 96;
public MapAbcToArcGISTLayer(String layerurl,String layername) {
super(layerurl);
this.layerurl = layerurl;
this.layername = layername;
initLayer();
}
protected void initLayer() {
if(getID()==0){
this.nativeHandle = create();
}
try {
SpatialReference localSpatialReference = SpatialReference.create(WKID);
setDefaultSpatialReference(localSpatialReference);
Envelope localEnvelope = new Envelope(371987.18333999999D,
252920.58593D, 624459.12035999994D, 423400.07714000001D);
setFullExtent(localEnvelope);
Point localPoint = new Point(0.0D, 458793.07714);
double[] arrayOfDoublescale = d;
double[] arrayOfDoubleres = c;
int k = d.length;
TiledServiceLayer.TileInfo localTileInfo = new TiledServiceLayer.TileInfo(
localPoint, arrayOfDoublescale, arrayOfDoubleres, k, 96,
256, 256);
setTileInfo(localTileInfo);
super.initLayer();
return;
} catch (Exception localException) {
localException.printStackTrace();
}
}

@Override
protected byte[] getTile(int level, int col, int row) throws Exception {
// TODO Auto-generated method stub
int nrow  = (int) (Math.floor((458400.07714) * res[level] / 256) - row);
String strUrl = layerurl + "x=" + col + "&y=" + nrow + "&z=" + level
+ "&type=ic&layer="+layername+"";
HashMap<String, String> localHashMap = new HashMap<String, String>();
byte[] bytes = a.a(strUrl, localHashMap);
return bytes;
}
}