如何获取可见地图范围的坐标（lat/lon）？

Question

如何使用android SDK获取ArcGIS MapView的可见地图范围角点坐标（纬度/经度）？

Answer 1

ArcGIS的运行10.2.x中：

SpatialReference WGS1984 = SpatialReference.create(4326); 
Polygon extent = (Polygon) GeometryEngine.project(
     mapView.getExtent(), 
     mapView.getSpatialReference(), 
     WGS1984); 
for (int i = 0; i < extent.getPointCount(); i++) { 
    Point corner = extent.getPoint(i); 
    // Do something with that corner, e.g. print it... 
    Toast.makeText(MainActivity.this, 
      "Here's a corner: " + corner.getX() + ", " + corner.getY(), 
      Toast.LENGTH_LONG).show(); 
} 

的ArcGIS运行石英（测试版3）：

SpatialReference WGS1984 = SpatialReference.create(4326); 
Envelope extent = (Envelope) GeometryEngine.project(
     mapView.getCurrentViewpoint(Viewpoint.Type.BOUNDING_GEOMETRY).getTargetGeometry(), 
     WGS1984); 
// Do something with the extent, e.g. print it... 
Toast.makeText(MainActivity.this, 
     "Extent:\n(" + extent.getXMin() + ", " + extent.getYMin() + "),\n" + 
       "(" + extent.getXMax() + ", " + extent.getYMax() + ")", 
     Toast.LENGTH_LONG).show();