andriod arcgis加载影像TIF

  private static final String TAG = "MainActivity";

    private MapView mapView = null;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        this.mapView = (MapView)this.findViewById(R.id.map);

        String rasterPath = Environment.getExternalStorageDirectory().getPath() +"/ArcGIS/samples/Raster/QL_IMage.tif"; //QL_IMage.tif,Landsat8Hawaii_naturecolor.tif

        FileRasterSource rasterSource =null;

        try {

            rasterSource = new FileRasterSource(rasterPath);

        } catch (IllegalArgumentException ie) {

            Log.d(TAG, "null or empty path");

        } catch (FileNotFoundException fe) {

            Log.d(TAG, "raster file doesn't exist");

        } catch (RuntimeException re) {

            Log.d(TAG, "raster file can't be opened");

        }

        RasterLayer rasterLayer = new RasterLayer(rasterSource);

        this.mapView.addLayer(rasterLayer);