xxx.geodatabase可以理解爲一個空間數據庫
直接上代碼：
1. 下載GDB
/** 數據保存路徑--（“/gdb”是文件夾）*/
String gdbFile = context.getCacheDir().getParent() + "/gdb";
/**調用判斷文件夾是否存在方法*/
localPath(gdbFile);
/**gdb文件位置(包含文件名)*/
this.localGeodatabasePath = gdbFile+"/pipeline.geodatabase";
/**判斷文件夾是否存在，不存在則新建*/
private void localPath(String path){
File file = new File(path);
if (!file.exists()) {
file.mkdirs();
}
}
/**
* 下載gdb數據並加載到地圖上
*/
public void downloadGeodatabase() {
mGeodatabaseSyncTask = new GeodatabaseSyncTask(serverPath);
mGeodatabaseSyncTask.loadAsync();
mGeodatabaseSyncTask.addDoneLoadingListener(new Runnable() {
@Override
public void run() {
// 顯示用作圖形的範圍
final Envelope extent = mMapView.getVisibleArea().getExtent();
// 爲當前範圍創建生成地理數據庫參數
final ListenableFuture<GenerateGeodatabaseParameters> defaultParameters = mGeodatabaseSyncTask
.createDefaultGenerateGeodatabaseParametersAsync(extent);
defaultParameters.addDoneListener(new Runnable() {
@Override
public void run() {
try {
// 設置參數，不包括附件
GenerateGeodatabaseParameters parameters = defaultParameters.get();
parameters.setReturnAttachments(false);
// 創建工程
final GenerateGeodatabaseJob generateGeodatabaseJob = mGeodatabaseSyncTask
.generateGeodatabaseAsync(parameters, localGeodatabasePath);
generateGeodatabaseJob.start();
createProgressDialog(generateGeodatabaseJob, "下載GDB數據");
// 獲取GDB數據文件
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) {
// 將gdb圖層加載到地圖上
/* List<GeodatabaseFeatureTable> gdbList = mGeodatabase.getGeodatabaseFeatureTables();
for (int i=0; i<gdbList.size(); i++){
GeodatabaseFeatureTable gdbFeatureTable = gdbList.get(i);
gdbFeatureTable.loadAsync();// 異步加載（必須寫）
FeatureLayer featureLayer = new FeatureLayer(gdbFeatureTable);
// 加載 geodatabase 數據圖層
mMapView.getMap().getOperationalLayers().add(featureLayer);
}*/
} else {
Toast.makeText(context,
"加載失敗！", 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數據
*/
public void syncGeodatabase() {
if (mGeodatabase != null){
// 創建同步參數
final SyncGeodatabaseParameters syncGeodatabaseParameters = new SyncGeodatabaseParameters();
syncGeodatabaseParameters.setSyncDirection(SyncGeodatabaseParameters.SyncDirection.BIDIRECTIONAL);
syncGeodatabaseParameters.setRollbackOnFailure(false);
// 獲取地理數據庫中每個特性表的層ID，然後將其添加到同步作業中
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數據");
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, "數據庫沒有正確同步", Toast.LENGTH_LONG).show();
}
}
});
}
});
}else {
Toast.makeText(context, "本地無數據",Toast.LENGTH_SHORT).show();
}
}
/**
* 進度條
*/
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();
// 監聽下載進度
job.addProgressChangedListener(new Runnable() {
@Override
public void run() {
syncProgressDialog.setProgress(job.getProgress());
if (job.getProgress() == 100)
syncProgressDialog.dismiss();// 當值爲100取消顯示dialog
}
});
}
3.添加信息和空間信息到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();
// 判斷當前featureTable圖層是否可編輯\可否添加信息
if (featureTable.isEditable() && featureTable.canAdd()){
Feature feature = featureTable.createFeature();
// 添加信息到GDB
/**feature.getAttributes().put(屬性值, 添加內容);**/
feature.getAttributes().put("name", "test");
// 添加空間對象(點線面均可以)
/** feature.setGeometry(Geometry);**/
feature.setGeometry(point);
// 調用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()) {
// 定位到添加點
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) {
// 處理異常
Toast.makeText(context, "fail", Toast.LENGTH_SHORT).show();
} catch (ExecutionException executionException) {
// 處理異常
Toast.makeText(context, "fail", Toast.LENGTH_SHORT).show();
}
}
});
} else {
Toast.makeText(context, "不允許添加", Toast.LENGTH_SHORT).show();
}
}
});
4.刪除GDB中信息和空間信息
feature.getFeatureTable().deleteFeatureAsync(feature) --- 刪除方法
// private List<Feature> mSelectedFeatures;
public void deleteFeatureOnTap(){
for (Feature feature : mSelectedFeatures) {
feature.getFeatureTable().deleteFeatureAsync(feature);
}
mSelectedFeatures.clear();
}
5.更改GDB中信息和空間信息
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屬性數據
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) {
// 處理異常
Toast.makeText(context, "fail", Toast.LENGTH_SHORT).show();
e.printStackTrace();
} catch (InterruptedException e) {
// 處理異常
Toast.makeText(context, "fail", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
});
}
mSelectedFeatures.clear();
}
6.篩選圖層
for (GeodatabaseFeatureTable gdbTable : gdbFeatureTables) {
FeatureLayer featureLayer = gdbTable.getFeatureLayer();
// 篩選出nama 列中 值是 demo的數據並加載地圖
featureLayer.setDefinitionExpression("name = "+ "\""+demo+"\"");
// featureLayer.setVisible(true);// 顯示
mMapView.getMap().getOperationalLayers().add(featureLayer);
}
7.加載本地GDB
/**
* 加載geodatabase數據
* */
public void initLoadGDB(){
if (mGeodatabase == null){
mGeodatabase = new Geodatabase(localGeodatabasePath);
mGeodatabase.loadAsync();// 異步加載（必須寫）
mGeodatabase.addDoneLoadingListener(new Runnable() {
@Override
public void run() {
gdbFeatureTables = mGeodatabase.getGeodatabaseFeatureTables();
for (GeodatabaseFeatureTable gdbTable : gdbFeatureTables) {
FeatureLayer featureLayer = new FeatureLayer(gdbTable);
featureLayer.setVisible(false);// 隱藏
mMapView.getMap().getOperationalLayers().add(featureLayer);
}
}
});
}
}