SceneView

Runtime100是用了一个GeoView类作为地图的基类直接继承于ViewGroup，然后MapView和SceneView分别作为二维和三维地图的容器继承于GeoView。

其实把SceneView当做MapView，把ArcGISScene当做ArcGISMap就行，于是我们简单尝试下。首先是在XML文件里添加SceneView：

 <com.esri.arcgisruntime.mapping.view.SceneView android:id="@+id/sceneview" android:layout_width="match_parent" android:layout_height="match_parent"> </com.esri.arcgisruntime.mapping.view.SceneView>

讯享网public class SceneViewActivity extends AppCompatActivity { private SceneView mSceneView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_scene_view); mSceneView = (SceneView) findViewById(R.id.sceneview); ArcGISScene arcGISScene = new ArcGISScene(); mSceneView.setScene(arcGISScene); } @Override protected void onResume() { super.onResume(); mSceneView.resume(); } @Override protected void onPause() { super.onPause(); mSceneView.pause(); } @Override protected void onDestroy() { super.onDestroy(); mSceneView.dispose(); } } 

运行下，看看效果：

讯享网

可以看出其实SceneView的基本底图就是一个地球，然后我们给它设置个瓦片图层作为底图：

 mSceneView = (SceneView) findViewById(R.id.sceneview); ArcGISScene arcGISScene = new ArcGISScene(); ArcGISTiledLayer arcGISTiledLayer = new ArcGISTiledLayer( "https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer"); Basemap basemap = new Basemap(arcGISTiledLayer); arcGISScene.setBasemap(basemap); mSceneView.setScene(arcGISScene);

可以看出这其实就是把一个切片图层展示在地球上，可以进行三维操作而已。

展示三维场景（ArcGISScene）

三维通过接近真实世界的角度来可视化数据信息
三维场景的使用类似于MapView和ArcGISMap，二维数据皆可加入三维场景
三维场景不同于二维，其具备高程表面（elevation surface）

无高程表面（elevation surface）

讯享网 private SceneView mSceneView; private String brest_buildings = " http://tiles.arcgis.com/tiles/P3ePLMYs2RVChkJx/arcgis/rest/services/Buildings_Brest/SceneServer"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_scene_layer); mSceneView = (SceneView) findViewById(R.id.sceneView); ArcGISScene scene = new ArcGISScene(); scene.setBasemap(Basemap.createImagery()); mSceneView.setScene(scene); // add a scene service to the scene for viewing buildings ArcGISSceneLayer sceneLayer = new ArcGISSceneLayer(brest_buildings); scene.getOperationalLayers().add(sceneLayer); // 设置三维场景视角镜头（camera） Camera camera = new Camera(48.378, -4.494, 200, 345, 65, 0); mSceneView.setViewpointCamera(camera); } 

使用高程表面（ArcGISTiledElevationSource、RasterElevationSource）

 private SceneView mSceneView; private String elevation_image_service = "http://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_display_scene); mSceneView = (SceneView) findViewById(R.id.sceneView); ArcGISScene scene = new ArcGISScene(); scene.setBasemap(Basemap.createImagery()); mSceneView.setScene(scene); ArcGISTiledElevationSource elevationSource = new ArcGISTiledElevationSource(elevation_image_service); scene.getBaseSurface().getElevationSources().add(elevationSource); Camera camera = new Camera(28.4, 83.9, 10010.0, 10.0, 80.0, 0.0); mSceneView.setViewpointCamera(camera); }

设置三维场景视角镜头（camera）

讯享网纬度（Latitude）、经度（longitude）和高程（elevation） Heading：镜头水平朝向 0度表示指北，从0度逐渐增加，镜头顺时针旋转，360度回到0度指北。 Pitch：镜头垂直朝向 0度表示垂直俯视地球，从0度逐渐增加，镜头沿其水平朝向，从俯视地球朝天空旋转，360度回到0度俯视地球。 public Camera(double latitude, double longitude, double altitude, double heading, double pitch, double roll) 

表面置放模式（LayerSceneProperties.SurfacePlacement）

与二维不同的是，通过GraphicsOverlay添加空间要素时，需要设置表面置放模式，默认为DRAPED。

DRAPED：空间要素紧贴场景表面（surface layer），不考虑空间要素的高程值（Z-values）
ABSOLUTE：空间要素通过其高程值（Z-values）设置距离球体表面（海平面）的高度
RELATIVE：空间要素通过其高程值（Z-values）设置距离场景表面（surface layer）的高度

球体表面和场景表面的差异在于是否使用高程表面，若不使用高程表面ABSOLUTE和RELATIVE在三维场景中展示的位置相同。

 private SceneView mSceneView; private String elevation_image_service = "http://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_surfac_placement); mSceneView = (SceneView) findViewById(R.id.sceneView); // create a scene and add a basemap to it ArcGISScene agsScene = new ArcGISScene(); agsScene.setBasemap(Basemap.createImagery()); mSceneView.setScene(agsScene); // add base surface for elevation data ArcGISTiledElevationSource elevationSource = new ArcGISTiledElevationSource(elevation_image_service); agsScene.getBaseSurface().getElevationSources().add(elevationSource); // add a camera and initial camera position Camera camera = new Camera(53.04, -4.04, 1300, 0, 90.0, 0); mSceneView.setViewpointCamera(camera); // create overlays with elevation modes GraphicsOverlay drapedOverlay = new GraphicsOverlay(); drapedOverlay.getSceneProperties().setSurfacePlacement(LayerSceneProperties.SurfacePlacement.DRAPED); mSceneView.getGraphicsOverlays().add(drapedOverlay); GraphicsOverlay relativeOverlay = new GraphicsOverlay(); relativeOverlay.getSceneProperties().setSurfacePlacement(LayerSceneProperties.SurfacePlacement.RELATIVE); mSceneView.getGraphicsOverlays().add(relativeOverlay); GraphicsOverlay absoluteOverlay = new GraphicsOverlay(); absoluteOverlay.getSceneProperties().setSurfacePlacement(LayerSceneProperties.SurfacePlacement.ABSOLUTE); mSceneView.getGraphicsOverlays().add(absoluteOverlay); // create point for graphic location Point point = new Point(-4.04, 53.06, 1000, camera.getLocation().getSpatialReference()); // create a red (0xFFFF0000) circle symbol SimpleMarkerSymbol circleSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.CIRCLE, 0xFFFF0000, 10); // create a text symbol for each elevation mode TextSymbol drapedText = new TextSymbol(10, "DRAPED", 0xFFFFFFFF, TextSymbol.HorizontalAlignment.LEFT, TextSymbol.VerticalAlignment.MIDDLE); TextSymbol relativeText = new TextSymbol(10, "RELATIVE", 0xFFFFFFFF, TextSymbol.HorizontalAlignment.LEFT, TextSymbol.VerticalAlignment.MIDDLE); TextSymbol absoluteText = new TextSymbol(10, "ABSOLUTE", 0xFFFFFFFF, TextSymbol.HorizontalAlignment.LEFT, TextSymbol.VerticalAlignment.MIDDLE); // add the point graphic and text graphic to the corresponding graphics // overlay drapedOverlay.getGraphics().add(new Graphic(point, circleSymbol)); drapedOverlay.getGraphics().add(new Graphic(point, drapedText)); relativeOverlay.getGraphics().add(new Graphic(point, circleSymbol)); relativeOverlay.getGraphics().add(new Graphic(point, relativeText)); absoluteOverlay.getGraphics().add(new Graphic(point, circleSymbol)); absoluteOverlay.getGraphics().add(new Graphic(point, absoluteText)); }

PortalItem

讯享网mSceneView = findViewById(R.id.sceneView); // get the portal url and portal item from ArcGIS online Portal portal = new Portal("http://www.arcgis.com/", false); PortalItem portalItem = new PortalItem(portal, "a13c3cbc933cb5e498b8e4"); ArcGISScene scene = new ArcGISScene(portalItem); mSceneView.setScene(scene);

三维场景中的可视化

三维场景（SceneView 、ArcGISScene）中具备更多的符号化方式来传递信息，包括SimpleMarkerSceneSymbol、ModelMarkerSymbol、DistanceCompositeSceneSymbol以及空间要素拉伸。