ArcGIS For Android 地圖比例尺擷取

mMapView.setOnZoomListener(new OnZoomListener() {
			
			@Override
			public void preAction(float arg0, float arg1, double arg2) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void postAction(float arg0, float arg1, double arg2) {
				// TODO Auto-generated method stub
				
				double scale = mMapView.getScale()/100;
				
				String unit = "米";
				
				if(scale > 1000){
					
					unit = "千米";
					scale = scale/1000;
					
				}
				
				BigDecimal bigDecimal = new BigDecimal(scale);
				scale = bigDecimal.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
				
				String result = scale+unit;
				
			}
		});