必应地图，承袭Windows Phone 设计风格，力图提供中国用户最为简单流畅的地图体验。 Bing Map version[ Improvements ] 1.7.0.0 1. Improve my location accuracy. 2. Add a refresh button if user search driving from current location. This way user can easily refresh the routing when his location changed. Bing Map version[ Improvements ] 1.6.0.0 1. 当定位服务不可用时，默认使用用户上次退出时的地点。 2. 修正地图图层问题。 1. When location service is not available, use user’s last map center to display map. 2. Fix map tile issues.