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xxx.geodatabase可以理解为一个空间数据库

直接上代码：

1. 下载GDB

/** 数据保存路径--（“/gdb”是文件夹）*/ String gdbFile = context.getCacheDir().getParent() + "/gdb"; /**调用判断文件夹是否存在方法*/ localPath(gdbFile); /**gdb文件位置(包含文件名)*/ this.localGeodatabasePath = gdbFile+"/pipeline.geodatabase"; /**判断文件夹是否存在，不存在则新建*/ private void localPath(String path){ File file = new File(path); if (!file.exists()) { file.mkdirs(); } } /** * 下载gdb数据并加载到地图上 */ public void downloadGeodatabase() { mGeodatabaseSyncTask = new GeodatabaseSyncTask(serverPath); mGeodatabaseSyncTask.loadAsync(); mGeodatabaseSyncTask.addDoneLoadingListener(new Runnable() { @Override public void run() { // 显示用作图形的范围 final Envelope extent = mMapView.getVisibleArea().getExtent(); // 为当前范围创建生成地理数据库参数 final ListenableFuture<GenerateGeodatabaseParameters> defaultParameters = mGeodatabaseSyncTask .createDefaultGenerateGeodatabaseParametersAsync(extent); defaultParameters.addDoneListener(new Runnable() { @Override public void run() { try { // 设置参数，不包括附件 GenerateGeodatabaseParameters parameters = defaultParameters.get(); parameters.setReturnAttachments(false); // 创建工程 final GenerateGeodatabaseJob generateGeodatabaseJob = mGeodatabaseSyncTask .generateGeodatabaseAsync(parameters, localGeodatabasePath); generateGeodatabaseJob.start(); createProgressDialog(generateGeodatabaseJob, "下载GDB数据"); // 获取GDB数据文件 generateGeodatabaseJob.addJobDoneListener(new Runnable() { @Override public void run() { if (generateGeodatabaseJob.getStatus() == Job.Status.SUCCEEDED) { mGeodatabase = generateGeodatabaseJob.getResult(); mGeodatabase.loadAsync(); mGeodatabase.addDoneLoadingListener(new Runnable() { @Override public void run() { if (mGeodatabase.getLoadStatus() == LoadStatus.LOADED) { // 将gdb图层加载到地图上 /* List<GeodatabaseFeatureTable> gdbList = mGeodatabase.getGeodatabaseFeatureTables(); for (int i=0; i<gdbList.size(); i++){ GeodatabaseFeatureTable gdbFeatureTable = gdbList.get(i); gdbFeatureTable.loadAsync();// 异步加载（必须写） FeatureLayer featureLayer = new FeatureLayer(gdbFeatureTable); // 加载 geodatabase 数据图层 mMapView.getMap().getOperationalLayers().add(featureLayer); }*/ } else { Toast.makeText(context, "加载失败！", Toast.LENGTH_LONG).show(); } } }); } else if (generateGeodatabaseJob.getError() != null) { Toast.makeText(context, "Error generating geodatabase: " + generateGeodatabaseJob.getError().getMessage(), Toast.LENGTH_LONG).show(); } else { Toast.makeText(context, "Unknown Error generating geodatabase", Toast.LENGTH_LONG).show(); } } }); } catch (InterruptedException | ExecutionException e) { Toast.makeText(context, "Error generating geodatabase parameters: " + e.getMessage(), Toast.LENGTH_LONG).show(); } } }); } }); }

2.同步GDB

/** * 同步gdb数据 */ public void syncGeodatabase() { if (mGeodatabase != null){ // 创建同步参数 final SyncGeodatabaseParameters syncGeodatabaseParameters = new SyncGeodatabaseParameters(); syncGeodatabaseParameters.setSyncDirection(SyncGeodatabaseParameters.SyncDirection.BIDIRECTIONAL); syncGeodatabaseParameters.setRollbackOnFailure(false); // 获取地理数据库中每个特性表的层ID，然后将其添加到同步作业中 for (GeodatabaseFeatureTable geodatabaseFeatureTable : mGeodatabase.getGeodatabaseFeatureTables()) { long serviceLayerId = geodatabaseFeatureTable.getServiceLayerId(); SyncLayerOption syncLayerOption = new SyncLayerOption(serviceLayerId); syncGeodatabaseParameters.getLayerOptions().add(syncLayerOption); } mGeodatabaseSyncTask = new GeodatabaseSyncTask(serverPath); mGeodatabase.addDoneLoadingListener(new Runnable() { @Override public void run() { final SyncGeodatabaseJob syncGeodatabaseJob = mGeodatabaseSyncTask .syncGeodatabaseAsync(syncGeodatabaseParameters, mGeodatabase); syncGeodatabaseJob.start(); createProgressDialog(syncGeodatabaseJob, "同步GDB数据"); syncGeodatabaseJob.addJobDoneListener(new Runnable() { @Override public void run() { if (syncGeodatabaseJob.getStatus() == Job.Status.SUCCEEDED) { Toast.makeText(context, "同步成功", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(context, "数据库没有正确同步", Toast.LENGTH_LONG).show(); } } }); } }); }else { Toast.makeText(context, "本地无数据",Toast.LENGTH_SHORT).show(); } } /** * 进度条 */ private void createProgressDialog(final Job job, String title) { final ProgressDialog syncProgressDialog = new ProgressDialog(context); syncProgressDialog.setTitle(title); syncProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); syncProgressDialog.setCanceledOnTouchOutside(false); syncProgressDialog.show(); // 监听下载进度 job.addProgressChangedListener(new Runnable() { @Override public void run() { syncProgressDialog.setProgress(job.getProgress()); if (job.getProgress() == 100) syncProgressDialog.dismiss();// 当值为100取消显示dialog } }); }

3.从GDB数据库中查询属性信息

// final String whereClause = "name = "+ "\""+qujie_name+"\""; // 查询语句 final String whereClause = "name like "+ "\'%"+name+"%\'"; QueryParameters query = new QueryParameters(); query.setWhereClause(whereClause); if (name.length() != 0){ for (GeodatabaseFeatureTable gdbTable : gdbFeatureTables){ final FeatureLayer queryFeatureLayer = gdbTable.getFeatureLayer(); // 查询图层显示 queryFeatureLayer.setVisible(false); final ListenableFuture<FeatureQueryResult> featureQueryResult = queryFeatureLayer.selectFeaturesAsync(query,FeatureLayer.SelectionMode.SUBTRACT); featureQueryResult.addDoneListener(new Runnable() { @Override public void run() { try { FeatureQueryResult features = featureQueryResult.get(); for (Object element : features){ if (element instanceof Feature){ mFeature = (Feature) element; // 查询图层显示 queryFeatureLayer.setVisible(true); // 筛选要素图层 queryFeatureLayer.setDefinitionExpression(whereClause); // 高亮 queryFeatureLayer.selectFeature(mFeature); // 取消高亮 queryFeatureLayer.unselectFeature(mFeature); Geometry geometry = mFeature.getGeometry(); // 点 定位 - 固定比例尺 // mapView.setViewpointCenterAsync((Point) geometry,500); // 图形定位 - 自定义比例尺 mapView.setViewpointGeometryAsync(geometry); /* Graphic graphic = null; if (geometry.getGeometryType() == GeometryType.POINT){// 点 Point point = (Point) geometry; SimpleMarkerSymbol simpleMarkerSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.CIRCLE,Color.RED,8); // 渲染 SimpleRenderer simpleRenderer = new SimpleRenderer(simpleMarkerSymbol); mGraphicsOverlay.setRenderer(simpleRenderer); graphic = new Graphic(point); mGraphicsOverlay.getGraphics().add(graphic); }else if(geometry.getGeometryType() == GeometryType.POLYLINE){// 线 Polyline polyline = (Polyline) geometry; SimpleLineSymbol simpleLineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID,Color.GREEN,2); graphic = new Graphic(polyline,simpleLineSymbol); mGraphicsOverlay.getGraphics().add(graphic); }else if (geometry.getGeometryType() == GeometryType.POLYGON){// 面 Polygon polygon = (Polygon) geometry; SimpleLineSymbol simpleLineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID,Color.BLUE,2); graphic = new Graphic(polygon,simpleLineSymbol); mGraphicsOverlay.getGraphics().add(graphic); }*/ } } }catch (Exception ex){ ex.printStackTrace(); } } }); } }

4.添加信息和空间信息到GDB

featureTable.addFeatureAsync(feature) --- 添加方法

GeodatabaseFeatureTable layer = gdbFeatureTables.get(0); final FeatureLayer featureLayer = layer.getFeatureLayer(); featureLayer.addDoneLoadingListener(new Runnable() { @Override public void run() { FeatureTable featureTable = featureLayer.getFeatureTable(); // 判断当前featureTable图层是否可编辑\可否添加信息 if (featureTable.isEditable() && featureTable.canAdd()){ Feature feature = featureTable.createFeature(); // 添加信息到GDB /**feature.getAttributes().put(属性值, 添加内容);**/ feature.getAttributes().put("name", "test"); // 添加空间对象(点线面均可以) /** feature.setGeometry(Geometry);**/ feature.setGeometry(point); // 调用addFeatureAsync方法增加要素 final ListenableFuture<Void> addFeatureOper = featureTable.addFeatureAsync(feature); addFeatureOper.addDoneListener(new Runnable() { @Override public void run() { try { addFeatureOper.get(); if (addFeatureOper.isDone()) { // 定位到添加点 Point point = new Point(Double.parseDouble((String) map.get("point_x")), Double.parseDouble((String) map.get("point_y"))); setMapCenter(point); //Toast.makeText(context, "success", Toast.LENGTH_SHORT).show(); } } catch (InterruptedException interruptedExceptionException) { // 处理异常 Toast.makeText(context, "fail", Toast.LENGTH_SHORT).show(); } catch (ExecutionException executionException) { // 处理异常 Toast.makeText(context, "fail", Toast.LENGTH_SHORT).show(); } } }); } else { Toast.makeText(context, "不允许添加", Toast.LENGTH_SHORT).show(); } } });

5.删除GDB中信息和空间信息

feature.getFeatureTable().deleteFeatureAsync(feature) --- 删除方法

// private List<Feature> mSelectedFeatures; public void deleteFeatureOnTap(){ for (Feature feature : mSelectedFeatures) { feature.getFeatureTable().deleteFeatureAsync(feature); } mSelectedFeatures.clear(); }

6.更改GDB中信息和空间信息

feature.getFeatureTable().updateFeatureAsync(feature); --- 更新方法

public void updateLineToGdb(final HashMap map){ for (final Feature feature : mSelectedFeatures) { final FeatureTable featureTable = feature.getFeatureTable(); // 更新name属性数据 feature.getAttributes().put("name", "test"); // 更新要素 final ListenableFuture<Void> updateFeatureOper = featureTable.updateFeatureAsync(feature); updateFeatureOper.addDoneListener(new Runnable() { @Override public void run() { try { updateFeatureOper.get(); if (updateFeatureOper.isDone()){ // Toast.makeText(context, "success", Toast.LENGTH_SHORT).show(); } } catch (ExecutionException e) { // 处理异常 Toast.makeText(context, "fail", Toast.LENGTH_SHORT).show(); e.printStackTrace(); } catch (InterruptedException e) { // 处理异常 Toast.makeText(context, "fail", Toast.LENGTH_SHORT).show(); e.printStackTrace(); } } }); } mSelectedFeatures.clear(); }

7.筛选图层

for (GeodatabaseFeatureTable gdbTable : gdbFeatureTables) { FeatureLayer featureLayer = gdbTable.getFeatureLayer(); // 筛选出nama 列中 值是 demo的数据并加载地图 featureLayer.setDefinitionExpression("name = "+ "\""+demo+"\""); // featureLayer.setVisible(true);// 显示 mMapView.getMap().getOperationalLayers().add(featureLayer); }

8.加载本地GDB

/** * 加载geodatabase数据 * 一次性全部加载 * */ public void initLoadGDB(){ if (mGeodatabase == null){ mGeodatabase = new Geodatabase(localGeodatabasePath); mGeodatabase.loadAsync();// 异步加载（必须写） mGeodatabase.addDoneLoadingListener(new Runnable() { @Override public void run() { if (mGeodatabase.getLoadStatus() == LoadStatus.LOADED){ gdbFeatureTables = mGeodatabase.getGeodatabaseFeatureTables(); for (GeodatabaseFeatureTable gdbTable : gdbFeatureTables) { // 此方法在第一次加载gdbTable无法获取layer //FeatureLayer featureLayer = gdbFeatureTable.getFeatureLayer(); // 此方法只能在第一次加载gdbTable时使用 FeatureLayer featureLayer = new FeatureLayer(gdbTable); //featureLayer.setVisible(false);// 隐藏 mMapView.getMap().getOperationalLayers().add(featureLayer); } } } }); } }

9.根据图层名称加载GDB图层

/** * 加载GDB数据 * @param gdbLayerName - 要加载的图层名称 * */ public void loadGDBFile(final String gdbLayerName){ makeRootDirectory(context,"GDB");// 创建存储GDB数据文件夹 mGeodatabase = new Geodatabase(readGDBFile(context,"info")); mGeodatabase.loadAsync();// 异步加载（必须写） mGeodatabase.addDoneLoadingListener(new Runnable() { @Override public void run() { GeodatabaseFeatureTable gdbTable = mGeodatabase.getGeodatabaseFeatureTable(gdbLayerName); FeatureLayer featureLayer = new FeatureLayer(gdbTable); mMapView.getMap().getOperationalLayers().add(featureLayer); } }); }