Arcgis For Android 加载天地图（拥有缓存功能）

天地图做为国家发布的地理信息公共服务平台，“天地图”网站装载了覆盖全球的地理信息数据，这些数据以矢量、影像、三维3种模式全方位、多角度展现，可漫游、能缩放，具有多类型全面的地理信息服务。

那怎么在Android程序中使用呢？

常量类：

public class TDTConstant {public static final String LAYER_NAME_VECTOR = "vec";public static final String LAYER_NAME_VECTOR_ANNOTATION_CHINESE = "cva";public static final String LAYER_NAME_VECTOR_ANNOTATION_ENGLISH = "eva";public static final String LAYER_NAME_IMAGE = "img";public static final String LAYER_NAME_IMAGE_ANNOTATION_CHINESE = "cia";public static final String LAYER_NAME_IMAGE_ANNOTATION_ENGLISH = "eia";public static final String LAYER_NAME_TERRAIN = "ter";public static final String LAYER_NAME_TERRAIN_ANNOTATION_CHINESE = "cta";public static final String TILE_MATRIX_SET_MERCATOR = "w";public static final String TILE_MATRIX_SET_2000 = "c";public static final Point ORIGIN_2000 = new Point(-180 + 0.000160, 90 - 0.000110);public static final Point ORIGIN_MERCATOR = new Point(-20037508.3427892, 20037508.3427892);public static final int SRID_2000 = 4490;public static final int SRID_MERCATOR = 102100;public static final double X_MIN_2000 = -180;public static final double Y_MIN_2000 = -90;public static final double X_MAX_2000 = 180;public static final double Y_MAX_2000 = 90;public static final double X_MIN_MERCATOR = -20037508.3427892;private static final double Y_MIN_MERCATOR = -20037508.3427892;public static final double X_MAX_MERCATOR = 20037508.3427892;public static final double Y_MAX_MERCATOR = 20037508.3427892;public static final int tileWidth = 256;public static final int tileHeight = 256;public static final int dpi = 96;public static final double[] SCALES = { 400000000, 295497598.5708346, 147748799.285417,73874399.6427087, 36937199.8213544, 18468599.9106772,9234299.95533859, 4617149.97766929, 2308574.98883465,1154287.49441732, 577143.747208662, 288571.873604331,144285.936802165, 72142.9684010827, 36071.4842005414,18035.7421002707, 9017.87105013534, 4508.93552506767,2254.467762533835};//,2254.467762533835, 1127.2338812669175, 563.616940// //错误   public static final double[] RESOLUTIONS_MERCATOR = { 78271.51696402048, 39135.75848201024, 19567.87924100512, 9783.93962050256, 4891.96981025128, 2445.98490512564, 1222.99245256282,
//            611.49622628141, 305.748113140705, 152.8740565703525, 76.43702828517625, 38.21851414258813, 19.109257071294063, 9.554628535647032, 4.777314267823516, 2.388657133911758, 1.194328566955879,
//            0.5971642834779395 };public static final double[] RESOLUTIONS_2000 = { 1.40625, 0.703125, 0.3515625, 0.17578125,0.087890625, 0.0439453125, 0.02197265625, 0.010986328125,0.0054931640625, 0.00274658203125, 0.001373291015625,0.0006866455078125, 0.00034332275390625, 0.000171661376953125,8.58306884765629E-05, 4.29153442382814E-05, 2.14576721191407E-05,1.07288360595703E-05, 5.36441802978515E-06};//, 2.68220901489258E-06,1.34110450744629E-06public static final Envelope Envelope_2000 = new Envelope(TDTConstant.X_MIN_2000,TDTConstant.Y_MIN_2000, TDTConstant.X_MAX_2000,TDTConstant.Y_MAX_2000);public static final Envelope Envelope_MERCATOR = new Envelope(TDTConstant.X_MIN_MERCATOR,TDTConstant.Y_MIN_MERCATOR, TDTConstant.X_MAX_MERCATOR,TDTConstant.Y_MAX_MERCATOR);public static final TiledServiceLayer.TileInfo TileInfo_2000 = new TiledServiceLayer.TileInfo(TDTConstant.ORIGIN_2000,TDTConstant.SCALES, TDTConstant.RESOLUTIONS_2000,TDTConstant.SCALES.length, TDTConstant.dpi,TDTConstant.tileWidth, TDTConstant.tileHeight);//    public static final TiledServiceLayer.TileInfo TileInfo_MERCATOR = new TiledServiceLayer.TileInfo(TDTConstant.ORIGIN_MERCATOR,
//            TDTConstant.SCALES, TDTConstant.RESOLUTIONS_MERCATOR,
//            TDTConstant.SCALES.length, TDTConstant.dpi,
//            TDTConstant.tileWidth, TDTConstant.tileHeight);}

天地图实体类：

public class TDTInfo {private String layerName;private int minZoomLevel = 0;private int maxZoomLevel = 17;private int srid;private String tileMatrixSet;private Envelope envelope;private TiledServiceLayer.TileInfo tileInfo;private TDTType mapType;public TDTType getMapType() {return mapType;}public void setMapType(TDTType mapType) {this.mapType = mapType;}public TiledServiceLayer.TileInfo getTileInfo() {return tileInfo;}public void setTileInfo(TiledServiceLayer.TileInfo tileInfo) {this.tileInfo = tileInfo;}public String getLayerName() {return layerName;}public void setLayerName(String layerName) {this.layerName = layerName;}public int getMinZoomLevel() {return minZoomLevel;}public void setMinZoomLevel(int minZoomLevel) {this.minZoomLevel = minZoomLevel;}public int getMaxZoomLevel() {return maxZoomLevel;}public void setMaxZoomLevel(int maxZoomLevel) {this.maxZoomLevel = maxZoomLevel;}public int getSrid() {return srid;}public void setSrid(int srid) {this.srid = srid;}public String getTileMatrixSet() {return tileMatrixSet;}public void setTileMatrixSet(String tileMatrixSet) {this.tileMatrixSet = tileMatrixSet;}public Envelope getEnvelope() {return envelope;}public void setEnvelope(Envelope envelope) {this.envelope = envelope;}

常用类型枚举：

public enum  TDTType {/*** 天地图矢量* */VEC_C,/*** 天地图影像* */IMG_C,/*** 天地图矢量标注* */CVA_C,/*** 天地图影像标注* */CIA_C,
}

URL封装类:

public class TDTUrl {private TDTType _tiandituMapServiceType;private int _level;private int _col;private int _row;public TDTUrl(int level, int col, int row, TDTType tiandituMapServiceType) {this._level = level;this._col = col;this._row = row;this._tiandituMapServiceType = tiandituMapServiceType;}public String getUrl() {StringBuilder url1 = new StringBuilder("http://t");StringBuilder url2 = new StringBuilder("http://t0.tianditu.com/");Random random = new Random();int subdomain = (random.nextInt(6) + 1);url1.append(subdomain);switch (this._tiandituMapServiceType) {case VEC_C://矢量url1.append(".tianditu.com/DataServer?T=").append("vec_c").append("&X=").append(this._col).append("&Y=").append(this._row).append("&L=").append(this._level);url2.append("vec_c/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=vec&STYLE=default&TILEMATRIXSET=c&TILEMATRIX="+this._level+"&TILEROW="+this._row+"&TILECOL="+this._col+"&FORMAT=tiles");break;case CVA_C://矢量注记url1.append(".tianditu.com/DataServer?T=").append("cva_c").append("&X=").append(this._col).append("&Y=").append(this._row).append("&L=").append(this._level);url2.append("cva_c/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=cva&STYLE=default&TILEMATRIXSET=c&TILEMATRIX="+this._level+"&TILEROW="+this._row+"&TILECOL="+this._col+"&FORMAT=tiles");break;case CIA_C://影像注记url1.append(".tianditu.com/DataServer?T=").append("cia_c").append("&X=").append(this._col).append("&Y=").append(this._row).append("&L=").append(this._level);url2.append("cia_c/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=cia&STYLE=default&TILEMATRIXSET=c&TILEMATRIX="+this._level+"&TILEROW="+this._row+"&TILECOL="+this._col+"&FORMAT=tiles");break;case IMG_C://影像url1.append(".tianditu.com/DataServer?T=").append("img_c").append("&X=").append(this._col).append("&Y=").append(this._row).append("&L=").append(this._level);url2.append("img_c/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=img&STYLE=default&TILEMATRIXSET=c&TILEMATRIX="+this._level+"&TILEROW="+this._row+"&TILECOL="+this._col+"&FORMAT=tiles");break;default:break;}if (this._level > 10) {//System.out.println(url2.toString());return url2.toString();} else {//System.out.println(url1.toString());return url1.toString();}}}

天地图图层类（加本地缓存功能）：

public class TDTTiedMapLayer extends TiledServiceLayer {//本地缓存路径public static String cachepath = MyApplication.basePath+"TileTDT";private TDTInfo _TDTInfo;public TDTTiedMapLayer(TDTInfo _TDTInfo) {super(true);this._TDTInfo=_TDTInfo;this.init();}private void init(){try {getServiceExecutor().submit(new Runnable() {@Overridepublic void run() {TDTTiedMapLayer.this.initLayer();}});}catch (RejectedExecutionException e){Log.e("TDT Map Layer", "initialization of the layer failed.",e);}}protected void initLayer(){if (getID() == 0L) {nativeHandle = create();changeStatus(com.esri.android.map.event.OnStatusChangedListener.STATUS.fromInt(-1000));} else {//设置瓦片信息this.setTileInfo(new com.esri.android.map.TiledServiceLayer.TileInfo(ORIGIN_2000, SCALES, RESOLUTIONS_2000, RESOLUTIONS_2000.length, dpi, tileWidth,tileHeight));//设置全幅边界、默认坐标系、初始边界this.setFullExtent(new Envelope(95.80873303426465, 16.036465898612885, 123.5371052042365, 33.491348458866938));this.setDefaultSpatialReference(SpatialReference.create(SRID_2000)); // CGCS2000this.setInitialExtent(new Envelope(108.80873303426465, 20.036465898612885, 117.5371052042365, 26.491348458866938));//执行父类初始化super.initLayer();}}@Overrideprotected byte[] getTile(int level, int col, int row) throws Exception {if (level>_TDTInfo.getMaxZoomLevel()||level<_TDTInfo.getMinZoomLevel())return new byte[0];byte[] bytes= getOffLineCacheFile(_TDTInfo.getMapType().toString(), level, col, row);try {if (bytes==null) {String url = (new TDTUrl(level, col, row, _TDTInfo.getMapType())).getUrl();bytes = com.esri.core.internal.io.handler.a.a(url,new HashMap());addOfflineCacheFile(_TDTInfo.getMapType().toString(), level, col, row,bytes);}}catch(Exception e){e.printStackTrace();}return bytes;}private byte[] getOffLineCacheFile(String _TDTType,int _level,int _col,int _row)throws IOException{File file=new File(cachepath+"/"+_TDTType+"/"+_level+"/"+_col+"/"+_row+".dat");if (file.exists()) {FileInputStream in = new FileInputStream(file);ByteArrayOutputStream out = new ByteArrayOutputStream(1024);byte[] temp = new byte[1024];int size = 0;while ((size = in.read(temp)) != -1) {out.write(temp, 0, size);}in.close();byte[] bytes = out.toByteArray();return bytes;}else {return null;}}private void addOfflineCacheFile(String _TDTType,int _level,int _col,int _row,byte[] bytes){File file=new File(cachepath);if (!file.exists()){file.mkdir();}File typeFile=new File(cachepath+"/"+_TDTType);if (!typeFile.exists()){typeFile.mkdir();}File levelFile=new File(cachepath+"/"+_TDTType+"/"+_level);if (!levelFile.exists()){levelFile.mkdir();}File colFile=new File(cachepath+"/"+_TDTType+"/"+_level+"/"+_col);if (!colFile.exists()){colFile.mkdir();}File rowFile=new File(cachepath+"/"+_TDTType+"/"+_level+"/"+_col+"/"+_row+".dat");if (!rowFile.exists()){try {FileOutputStream outputStream=new FileOutputStream(rowFile);outputStream.write(bytes);outputStream.close();}catch (IOException e){e.printStackTrace();}}}
}

调用：

    private void initBaseMap(){TDTInfo tdtInfo=new TDTInfo();tdtInfo.setMapType(TDTType.VEC_C);TDTInfo tdtInfo1=new TDTInfo();tdtInfo1.setMapType(TDTType.CVA_C);Layer layer2d=new TDTTiedMapLayer(tdtInfo);Layer layer2dzj=new TDTTiedMapLayer(tdtInfo1);mapView.addLayer(layer2d);mapView.addLayer(layer2dzj);}

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