arcgis runtime sdk for android 系列 - 加载地形数据小结

try {

      // add an elevation source to the scene by passing the URI of the raster package to the constructor

      RasterElevationSource rasterElevationSource = new RasterElevationSource(filePaths);



      // add a listener to perform operations when the load status of the elevation source changes

      rasterElevationSource.addLoadStatusChangedListener(loadStatusChangedEvent -> {

        // when elevation source loads

        if (loadStatusChangedEvent.getNewLoadStatus() == LoadStatus.LOADED) {

          // add the elevation source to the elevation sources of the scene

          mSceneView.getScene().getBaseSurface().getElevationSources().add(rasterElevationSource);

        } else if (loadStatusChangedEvent.getNewLoadStatus() == LoadStatus.FAILED_TO_LOAD) {

          // notify user that the elevation source has failed to load

          logErrorToUser(getString(R.string.error_raster_elevation_source_load_failure_message,

              rasterElevationSource.getLoadError()));

        }

      });



      // load the elevation source asynchronously

      rasterElevationSource.loadAsync();

    } catch (IllegalArgumentException e) {

      // catch exception thrown by RasterElevationSource when a file is invalid/not found

      logErrorToUser(getString(R.string.error_raster_elevation_source_load_failure_message, e.getMessage()));

    }

 // add a ArcGISTiledElevationSource to the scene by passing the URI of the local tile package to the constructor

    ArcGISTiledElevationSource tiledElevationSource = new ArcGISTiledElevationSource(

        Environment.getExternalStorageDirectory() + getString(R.string.local_tile_package_location));



    // add a listener to perform operations when the load status of the ArcGISTiledElevationSource changes

    tiledElevationSource.addLoadStatusChangedListener(loadStatusChangedEvent -> {

      // when ArcGISTiledElevationSource loads

      if (loadStatusChangedEvent.getNewLoadStatus() == LoadStatus.LOADED) {

        // add the ArcGISTiledElevationSource to the elevation sources of the scene

        mSceneView.getScene().getBaseSurface().getElevationSources().add(tiledElevationSource);

      } else if (loadStatusChangedEvent.getNewLoadStatus() == LoadStatus.FAILED_TO_LOAD) {

        // notify user that the ArcGISTiledElevationSource has failed to load

        logErrorToUser(getString(R.string.error_tiled_elevation_source_load_failure_message));

      }

    });



    // load the ArcGISTiledElevationSource asynchronously

    tiledElevationSource.loadAsync();

 // add base surface for elevation data

    final Surface surface = new Surface();

    ArcGISTiledElevationSource elevationSource = new ArcGISTiledElevationSource(getString(R.string.elevation_image_service_url));

    surface.getElevationSources().add(elevationSource);

    scene.setBaseSurface(surface);

1. https://developers.arcgis.com/android/latest/java/sample-code/create-terrain-from-a-local-raster/
2. https://developers.arcgis.com/android/latest/java/sample-code/create-terrain-from-a-local-tile-package
3. https://github.com/Esri/arcgis-runtime-samples-android/blob/master/java/terrain-exaggeration/src/main/java/com/esri/arcgisruntime/sample/terrainexaggeration/MainActivity.java