Android Arcgis入门(12)、加载天地图

在项目中可以经常需要动态加载一些图层，像投影地图服务、投影地图服务器。其实网上有大量这样的服务，比如天地图官网，

。

随便点开一个服务，里面有相关的信息。那如何加载这样图层服务呢。

一、首先感谢这篇博文ArcGIS读取天地图出现错位的情况，这篇文章的下载链接也有许多有用的资料。加载天地图用到一个关键的自定义类TianDiTuLayer

package com.huang.tianditu.layer;import java.util.Map;
import java.util.concurrent.RejectedExecutionException;import android.util.Log;import com.esri.android.map.TiledServiceLayer;
import com.esri.core.geometry.Envelope;
import com.esri.core.geometry.SpatialReference;public class TianDiTuLayer extends TiledServiceLayer {private TianDiTuLayerInfo layerInfo;public TianDiTuLayer(int layerType) {super(true);this.layerInfo = LayerInfoFactory.getLayerInfo(layerType);this.init();}private void init() {try {getServiceExecutor().submit(new Runnable() {public void run() {TianDiTuLayer.this.initLayer();}});} catch (RejectedExecutionException rejectedexecutionexception) {Log.e("ArcGIS", "initialization of the layer failed.", rejectedexecutionexception);}}public byte[] getTile(int level, int col, int row) throws Exception {String url = layerInfo.getUrl() + "?service=wmts&request=gettile&version=1.0.0&layer=" + layerInfo.getLayerName() + "&format=tiles&tilematrixset=" + layerInfo.getTileMatrixSet() + "&tilecol="+ col + "&tilerow=" + row + "&tilematrix=" + (level + 1);Map<String, String> map = null;return com.esri.core.internal.io.handler.a.a(url, map);}protected void initLayer() {if (getID() == 0L) {nativeHandle = create();changeStatus(com.esri.android.map.event.OnStatusChangedListener.STATUS.fromInt(-1000));} else {this.setDefaultSpatialReference(SpatialReference.create(layerInfo.getSrid()));Log.e("huang", layerInfo.toString()+"");this.setFullExtent(new Envelope(layerInfo.getxMin(), layerInfo.getyMin(), layerInfo.getxMax(), layerInfo.getyMax()));this.setTileInfo(new TileInfo(layerInfo.getOrigin(), layerInfo.getScales(), layerInfo.getResolutions(), layerInfo.getScales().length, layerInfo.getDpi(), layerInfo.getTileWidth(),layerInfo.getTileHeight()));super.initLayer();}}}

另外还有三个类，TianDiTuLayerInfo、LayerInfoFactory、TianDiTuLayerTypes这里就不贴代码了。资料下载。

二、我们修改一下代码
1.常量类TDTConstant:

package com.huang.tianditu;import com.esri.android.map.TiledServiceLayer.TileInfo;
import com.esri.core.geometry.Envelope;
import com.esri.core.geometry.Point;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, 90);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 = { 2.958293554545656E8, 1.479146777272828E8, 7.39573388636414E7, 3.69786694318207E7, 1.848933471591035E7, 9244667.357955175, 4622333.678977588,2311166.839488794, 1155583.419744397, 577791.7098721985, 288895.85493609926, 144447.92746804963, 72223.96373402482, 36111.98186701241, 18055.990933506204, 9027.995466753102,4513.997733376551, 2256.998866688275 };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 = { 0.7031249999891485, 0.35156249999999994, 0.17578124999999997, 0.08789062500000014, 0.04394531250000007, 0.021972656250000007,0.01098632812500002, 0.00549316406250001, 0.0027465820312500017, 0.0013732910156250009, 0.000686645507812499, 0.0003433227539062495, 0.00017166137695312503, 0.00008583068847656251,0.000042915344238281406, 0.000021457672119140645, 0.000010728836059570307, 0.000005364418029785169 };public 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 TileInfo TileInfo_2000 = new TileInfo(TDTConstant.ORIGIN_2000,TDTConstant.SCALES, TDTConstant.RESOLUTIONS_2000,TDTConstant.SCALES.length, TDTConstant.dpi,TDTConstant.tileWidth, TDTConstant.tileHeight);public static final TileInfo TileInfo_MERCATOR = new TileInfo(TDTConstant.ORIGIN_MERCATOR,TDTConstant.SCALES, TDTConstant.RESOLUTIONS_MERCATOR,TDTConstant.SCALES.length, TDTConstant.dpi,TDTConstant.tileWidth, TDTConstant.tileHeight);}

2.TianDiTuLayer，代码如下：

package com.huang.tianditu;import java.util.Map;
import java.util.concurrent.RejectedExecutionException;import android.util.Log;import com.esri.android.map.TiledServiceLayer;
import com.esri.core.geometry.SpatialReference;public class TianDiTuLayer extends TiledServiceLayer {private TianDiTuInfo tianDiTuInfo;public TianDiTuLayer(TianDiTuInfo tianDiTuInfo) {super(true);this.tianDiTuInfo = tianDiTuInfo;this.init();}private void init() {try {getServiceExecutor().submit(new Runnable() {public void run() {TianDiTuLayer.this.initLayer();}});} catch (RejectedExecutionException rejectedexecutionexception) {Log.e("ArcGIS", "initialization of the layer failed.", rejectedexecutionexception);}}public byte[] getTile(int level, int col, int row) throws Exception {String url = tianDiTuInfo.getUrl() + "?service=wmts&request=gettile&version=1.0.0&layer=" + tianDiTuInfo.getLayerName() + "&format=tiles&tilematrixset=" + tianDiTuInfo.getTileMatrixSet() + "&tilecol="+ col + "&tilerow=" + row + "&tilematrix=" + (level + 1);Map<String, String> map = null;return com.esri.core.internal.io.handler.a.a(url, map);}protected void initLayer() {if (getID() == 0L) {nativeHandle = create();changeStatus(com.esri.android.map.event.OnStatusChangedListener.STATUS.fromInt(-1000));} else {this.setDefaultSpatialReference(SpatialReference.create(tianDiTuInfo.getSrid()));this.setFullExtent(tianDiTuInfo.getEnvelope());this.setTileInfo(tianDiTuInfo.getTileInfo());super.initLayer();}}}

3.TianDiTuInfo实体类：

package com.huang.tianditu;import com.esri.android.map.TiledServiceLayer.TileInfo;
import com.esri.core.geometry.Envelope;public class TianDiTuInfo {private String url;private String layerName;private int minZoomLevel = 0;private int maxZoomLevel = 17;private int srid;private String tileMatrixSet;private Envelope envelope;private TileInfo tileInfo;public String getUrl() {return url;}public void setUrl(String url) {this.url = url;}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;}public TileInfo getTileInfo() {return tileInfo;}public void setTileInfo(TileInfo tileInfo) {this.tileInfo = tileInfo;}}

4.Activity代码：

package com.huang.tianditu;import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;import com.esri.android.map.MapView;public class TianDiTuLayerActivity extends Activity {private MapView mMapView;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);mMapView = (MapView) findViewById(R.id.mapView);TianDiTuInfo tianDiTuInfo = new TianDiTuInfo();tianDiTuInfo.setUrl("http://t0.tianditu.com/vec_c/wmts");tianDiTuInfo.setLayerName(TDTConstant.LAYER_NAME_VECTOR);tianDiTuInfo.setTileMatrixSet(TDTConstant.TILE_MATRIX_SET_2000);tianDiTuInfo.setSrid(TDTConstant.SRID_2000);tianDiTuInfo.setEnvelope(TDTConstant.Envelope_2000);tianDiTuInfo.setTileInfo(TDTConstant.TileInfo_2000);mMapView.addLayer(new TianDiTuLayer(tianDiTuInfo));}}

调用的地图服务相关信息
效果图：

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Android Arcgis入门(12)、加载天地图

在项目中可以经常需要动态加载一些图层，像投影地图服务、投影地图服务器。其实网上有大量这样的服务，比如天地图官网，

随便点开一个服务，里面有相关的信息。那如何加载这样图层服务呢。

一、首先感谢这篇博文ArcGIS读取天地图出现错位的情况，这篇文章的下载链接也有许多有用的资料。加载天地图用到一个关键的自定义类TianDiTuLayer

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