ArcGIS API For Android离线地图的实现

今天搞了一个ArcGIS API For Android离线地图的实现。
效果如下：

ArcGIS API For Android离线地图的实现_第1张图片

Android的版本是2.1
main.xml，这里要说明的，初始化范围一定要有，不然会不能显示的。

<?xml version="1.0" encoding="utf-8"?><com.esri.android.map.MapView      xmlns:android="http://schemas.android.com/apk/res/android"      android:id="@+id/map" android:layout_width="fill_parent"      android:layout_height="fill_parent"     initExtent="120.64101459999999 31.280566089 120.6769494 31.303135911">           <com.esri.arcgis.sample.AgsOfflineTiledLayer android:id="@+id/layer"/>      </com.esri.android.map.MapView>

AgsLOD.java

package com.esri.arcgis.sample;import com.esri.core.internal.d.c;public class AgsLOD extends c {    private static final long serialVersionUID = 4341699179151728883L;        private int level;    private double resolution;    private double scale;    public AgsLOD(int level, double scale, double resolution) {super();this.level = level;this.scale = scale;this.resolution = resolution;    }    public int a() {return this.level;    }    public double b() {return this.resolution;    }    public double c() {return this.scale;    }}

AgsOfflineTiledLayer.java

package com.esri.arcgis.sample;import java.io.File;import java.util.ArrayList;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import org.w3c.dom.Document;import org.w3c.dom.Node;import org.w3c.dom.NodeList;import android.content.Context;import android.util.AttributeSet;import android.util.Log;import com.esri.android.map.TiledLayer;import com.esri.core.geometry.Envelope;import com.esri.core.geometry.Point;import com.esri.core.geometry.SpatialReference;import com.esri.core.internal.d.c;import com.esri.core.internal.d.k;import com.esri.core.map.TiledLayerModel;public class AgsOfflineTiledLayer extends TiledLayer {//瓦片文件的路径呀  private String location = "/sdcard/BaseMap/Layers";//REST里面的空间参考private SpatialReference spatialReference = SpatialReference.create(4326);//全图范围private Envelope fullExtent = new Envelope(120.64101459999999,31.280566089, 120.6769494, 31.303135911);private k tileInfo;public AgsOfflineTiledLayer(Context context, AttributeSet attrs) {super(context, attrs);try {init();} catch (Exception ex) {ex.printStackTrace();}}@Overrideprotected TiledLayerModel initModel() throws Exception {return new AgsOfflineTiledLayerModel(location, spatialReference, fullExtent, tileInfo);}private void init() {String confPath = location + File.separator + "conf.xml";Log.i("conf", confPath);try {tileInfo = new k();DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();File file = new File(confPath);Document doc = docBuilder.parse(file);NodeList nsX = doc.getElementsByTagName("X");double originX = Double.valueOf(nsX.item(0).getFirstChild().getNodeValue());NodeList nsY = doc.getElementsByTagName("Y");double originY = Double.valueOf(nsY.item(0).getFirstChild().getNodeValue());tileInfo.f = new Point(originX, originY);NodeList nsTileRows = doc.getElementsByTagName("TileRows");tileInfo.a = Integer.valueOf(nsTileRows.item(0).getFirstChild().getNodeValue());NodeList nsTileCols = doc.getElementsByTagName("TileCols");tileInfo.b = Integer.valueOf(nsTileCols.item(0).getFirstChild().getNodeValue());NodeList nsLODInfos = doc.getElementsByTagName("LODInfos");tileInfo.h = new ArrayList<c>();NodeList lodInfos = nsLODInfos.item(0).getChildNodes();for (int j = 0, jcount = lodInfos.getLength(); j < jcount; j++) {Node lod = lodInfos.item(j);NodeList list = lod.getChildNodes();int level = Integer.valueOf(list.item(0).getFirstChild().getNodeValue());double scale = Double.valueOf(list.item(1).getFirstChild().getNodeValue());double resolution = Double.valueOf(list.item(2).getFirstChild().getNodeValue());tileInfo.h.add(new AgsLOD(level, scale, resolution));}} catch (Exception e) {e.printStackTrace();}}}

AgsOfflineTiledLayerModel.java

package com.esri.arcgis.sample;import java.io.File;import java.io.FileInputStream;import android.util.Log;import com.esri.core.geometry.Envelope;import com.esri.core.geometry.SpatialReference;import com.esri.core.internal.d.k;import com.esri.core.map.TiledLayerModel;public class AgsOfflineTiledLayerModel extends TiledLayerModel {private static final long serialVersionUID = 7726567118839553087L;private String location;public AgsOfflineTiledLayerModel(String location, SpatialReference sr,Envelope full, k tileInfo) {super(sr, full, tileInfo);this.location = location;}@Overridepublic byte[] getTile(int level, int row, int col) throws Exception {byte[] result = null;try {String bundlesDir = location + File.separator + "_alllayers";Log.i("location", bundlesDir);String l = "0" + level;int lLength = l.length();if (lLength > 2) {l = l.substring(lLength - 2);}l = "L" + l;int rGroup = 128 * (row / 128);String r = "000" + Integer.toHexString(rGroup);int rLength = r.length();if (rLength > 4) {r = r.substring(rLength - 4);}r = "R" + r;int cGroup = 128 * (col / 128);String c = "000" + Integer.toHexString(cGroup);int cLength = c.length();if (cLength > 4) {c = c.substring(cLength - 4);}c = "C" + c;String bundleBase = String.format("%s/%s/%s%s", bundlesDir, l, r, c);String bundlxFileName = bundleBase + ".bundlx";String bundleFileName = bundleBase + ".bundle";int index = 128 * (col - cGroup) + (row - rGroup);FileInputStream isBundlx = new FileInputStream(bundlxFileName);isBundlx.skip(16 + 5 * index);byte[] buffer = new byte[5];isBundlx.read(buffer);long offset = (long) (buffer[0] & 0xff) + (long) (buffer[1] & 0xff)* 256 + (long) (buffer[2] & 0xff) * 65536+ (long) (buffer[3] & 0xff) * 16777216+ (long) (buffer[4] & 0xff) * 4294967296L;FileInputStream isBundle = new FileInputStream(bundleFileName);isBundle.skip(offset);byte[] lengthBytes = new byte[4];isBundle.read(lengthBytes);int length = (int) (lengthBytes[0] & 0xff)+ (int) (lengthBytes[1] & 0xff) * 256+ (int) (lengthBytes[2] & 0xff) * 65536+ (int) (lengthBytes[3] & 0xff) * 16777216;result = new byte[length];isBundle.read(result);} catch (Exception ex) {ex.printStackTrace();}return result;}}

AgsOfflineTiles.java

package com.esri.arcgis.sample;import com.esri.android.map.MapView;import android.app.Activity;import android.os.Bundle;public class AgsOfflineTiles extends Activity {MapView map = null;AgsOfflineTiledLayer layer = null;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        map = (MapView) findViewById(R.id.map);layer = (AgsOfflineTiledLayer) findViewById(R.id.layer);                   }}

在SD卡的瓦片数据的路径

ArcGIS API For Android离线地图的实现_第2张图片

源码和测试数据在附件中

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