arcgis for android（八）加载shape和影像

本是古典何须时尚 2022-09-09 12:45 430阅读 0赞

1、上一章讲了arcgis for android 入门与提高（七）加载服务[arcgis for android 入门与提高（七）加载arcgis server服务\_郝大大的博客-CSDN博客][arcgis for android _arcgis server_-CSDN]，介绍了三种加载服务图层的方式，这节讲如何加载各类数据。

2、shape数据是最常用的数据，arcgis for android提供了提别方便的接口供我们使用，当然这个接口的权限是最高的，所以只能在开发者模式中使用。

**首先我们要获取Android读取文件的权限：**

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.
            permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
        permissionList.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
    }

**把数据拷贝到设备中，**设置导入数据的路径，**Environment.getExternalStorageDirectory()**是根目录：

String shapeFile = Environment.getExternalStorageDirectory() + "/test.shp";

3、默认的显示效果是黑色的，我们需要给它一个颜色渲染**SimpleRenderer **，点、线、面符号颜色、大小用**SimpleMarkerSymbol**、**SimpleLineSymbol**、**SimpleFillSymbol**表示，核心代码：

private void importShape(String shapeFile) {
        ShapefileFeatureTable shapefileFeatureTable = new ShapefileFeatureTable(shapeFile);
        FeatureLayer featureLayer = new FeatureLayer(shapefileFeatureTable);
        mMapView.getMap().getOperationalLayers().add(featureLayer);
        shapefileFeatureTable.addDoneLoadingListener(new Runnable() {
            @Override
            public void run() {
                if (shapefileFeatureTable.getLoadStatus() == LoadStatus.LOADED) {
                    mMapView.setViewpointGeometryAsync(shapefileFeatureTable.getExtent());
                    String geoType = shapefileFeatureTable.getGeometryType().toString();
                    SimpleRenderer renderer = null;
                    SimpleMarkerSymbol markerSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.Style.CIRCLE, Color.GREEN, 6);
                    SimpleLineSymbol lineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, Color.RED, 1);
                    SimpleFillSymbol fillSymbol = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, Color.argb(70, 252, 241, 144), lineSymbol);
                    if (geoType.equals("POINT")) {
                        renderer = new SimpleRenderer(markerSymbol);
                    }
                    if (geoType.equals("POLYLINE")) {
                        renderer = new SimpleRenderer(lineSymbol);
                    }
                    if (geoType.equals("POLYGON")) {
                        renderer = new SimpleRenderer(fillSymbol);
                    }
                    featureLayer.setRenderer(renderer);
                } else {
                    String error = "Shapefile feature table failed to load: " + shapefileFeatureTable.getLoadError().toString();
                    Toast.makeText(MainActivity.this, error, Toast.LENGTH_LONG).show();
                }
            }
        });
    }

4、效果：

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5LmL5LmO6ICF5Lmf5ZOm_size_12_color_FFFFFF_t_70_g_se_x_16][]  ![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5LmL5LmO6ICF5Lmf5ZOm_size_12_color_FFFFFF_t_70_g_se_x_16 1][]

5、加载影像：

private void importTiff(String tiffFile) {
        Raster raster = new Raster(tiffFile);
        RasterLayer rasterLayer = new RasterLayer(raster);
        mMapView.getMap().getOperationalLayers().add(rasterLayer);
        rasterLayer.addDoneLoadingListener(new Runnable() {
            @Override
            public void run() {
                if (raster.getLoadStatus() == LoadStatus.LOADED)
                    mMapView.setViewpointGeometryAsync(rasterLayer.getFullExtent());
                else {
                    String error = "Raster failed to load: " + raster.getLoadError().toString();
                    Toast.makeText(MainActivity.this, error, Toast.LENGTH_LONG).show();
                }
            }
        });
    }

6、下一节讲解 **arcgis for android 入门与提高（九）地理查询**[arcgis for android 入门与提高（九）地理查询 + 触摸事件\_郝大大的博客-CSDN博客][arcgis for android _ _ _-CSDN]

欢迎订阅专栏！

[arcgis for android _arcgis server_-CSDN]: https://blog.csdn.net/HB_Programmer/article/details/120009351
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5LmL5LmO6ICF5Lmf5ZOm_size_12_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/20210901102833844.png?x-oss-process=image/watermark,type_ZHJvaWRzYW5zZmFsbGJhY2s,shadow_50,text_Q1NETiBA5LmL5LmO6ICF5Lmf5ZOm,size_12,color_FFFFFF,t_70,g_se,x_16
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBA5LmL5LmO6ICF5Lmf5ZOm_size_12_color_FFFFFF_t_70_g_se_x_16 1]: /images/20220829/dff192308b2a49379a5019cfbee0842c.png
[arcgis for android _ _ _-CSDN]: https://blog.csdn.net/HB_Programmer/article/details/120031792