在100.3中仍然使用FeatureLayer來(lái)加載geodatabase中的要素。
不過(guò)與10.2.9不同的是需要異步加載。

加載離線數(shù)據(jù) geodatabase文件:

String path=StorageUtil.getSDCardRootPath(getApplicationContext())+"/ydyzt/data/GD_TDYT.geodatabase";
final Geodatabase localGdb=new Geodatabase(path);
// 異步加載
localGdb.loadAsync();
localGdb.addDoneLoadingListener(new Runnable() {
    @Override
    public void run() {
        LayerList mainLayerList = arcGISMap.getOperationalLayers();
        for (GeodatabaseFeatureTable gdbFeatureTable : localGdb.getGeodatabaseFeatureTables()) {
                 FeatureLayer dataFeatureLayer = new FeatureLayer(gdbFeatureTable);
                 mainLayerList.add(dataFeatureLayer);
                 // 地圖服務(wù)加載監(jiān)聽(tīng) -- 監(jiān)聽(tīng)地圖服務(wù)是否加載成功并作出后續(xù)動(dòng)作
                 featureLayer.addLoadStatusChangedListener(mOnStatusListener);
        }
    }
});

離線Geodatabase空間查詢:

第一種查詢方式: Identify查詢

        /* 使用Identify查詢 -- 參數(shù): 
           FeatureLayer（查詢的要素圖層）、
          ScreenPoint（屏幕坐標(biāo)點(diǎn)）、
          誤差值、
          是否只返回Popup、
          返回的最大結(jié)果數(shù)量 */
        ListenableFuture<IdentifyLayerResult> iFeatureResult =
                mMapView.identifyLayerAsync(feature, screenPoint, 5, false, 25);

        // 監(jiān)聽(tīng)異步查詢 -- 當(dāng)查詢結(jié)束時(shí)調(diào)用
        iFeatureResult.addDoneListener(new Runnable() {
            @Override
            public void run() {
                try {
                    IdentifyLayerResult iResult = iFeatureResult.get();
                    for (GeoElement identifiedElement : iResult.getElements()) {
                        if (identifiedElement instanceof Feature) {
                            mFeature = (Feature) identifiedElement;
                            ... do something ...
                        }
                    }
                } catch (InterruptedException | ExecutionException e) {
                    e.printStackTrace();
                    LogUtil.d("查詢拋出異常:" + feature.getName());
                }
            }
        });

第二種查詢方式: Query查詢

// 通過(guò)點(diǎn)擊的屏幕點(diǎn) -- 轉(zhuǎn)為地圖上的點(diǎn)
// 設(shè)置誤差范圍
int offSize = 15;
Point minPoint = new Point(mPoint.getX() - offSize, mPoint.getY() - offSize);
Point maxPoint = new Point(mPoint.getX() + offSize, mPoint.getY() + offSize);

QueryParameters queryParameters = new QueryParameters();
Envelope queryEnv = new Envelope(minPoint, maxPoint);

// 設(shè)置查詢范圍（查詢條件）
queryParameters.setGeometry(queryEnv);
queryParameters.setReturnGeometry(true);
queryParameters.setSpatialRelationship(QueryParameters.SpatialRelationship.INTERSECTS);
// 開(kāi)始異步查詢
ListenableFuture<FeatureQueryResult> featureQueryResult
                = featureTable.queryFeaturesAsync(queryParameters);
// 設(shè)置異步查詢監(jiān)聽(tīng)
featureQueryResult.addDoneListener(new Runnable() {
     @Override
     public void run() {
             try {
                     FeatureQueryResult result = featureQueryResult.get();
                     Iterator<Feature> iterator = result.iterator();
                     Feature mFeature;
                     while (iterator.hasNext()) {
                             mFeature = iterator.next();
                             ... do something ...
                     } 
              } catch (InterruptedException | ExecutionException e) {
                     e.printStackTrace();
                     LogUtil.d("查詢拋出異常:" + feature.getName());
             }
     }
});

一般情況是使用第二種方法查詢，在實(shí)際使用過(guò)程中，因?yàn)橛龅揭恍┎惶宄拈W退，所以換成了第一種方法查詢。