定位到自己，获取到自己的经纬度然后根据一直的几个经纬度点 算出直接的距离和角度-Navigate to yourself, and then get into their latitude and longitude latitude and longitude based on a few points have been calculated distance and angle directly

这是android开发的谷歌地图，可以选择地图上任意一点再计算与指定经纬度的距离。-This is a Google Maps android development, you can select and then calculate the distance between any point on the map with the specified latitude and longitude.