位置感知Android，比较Java或数据库中的距离？

Question

I have a question about geopoints guys..

I'm implementing a location-aware client-server application in android. Clients have some saved locations in the server database (mysql). And they will get some messages bound to these locations.

I have to compare distance between 2 points, what is the best way to store and calculate the distance. Calculating the dinstance in the database with query, or geting all results into server java, and then calculate 2 points which is supplied by Location.distanceBetween(..).

Which way is better, i'm a newbie in this. Thank you..

Answer 1

如果使用查询计算数据库中的距离，则应遍历数据库中的所有行...，并计算与该行中每个点的距离。或者如果将所有结果都输入到服务器中，然后计算之间的距离2分，那么您还应该遍历数据库的所有行并获取行中的值..然后计算距离..但在第二种情况下，您应该获取数据库中的所有值 （即位置值）...但是在第一种情况下，只有一个值 ...这是在第二种情况下应该做的额外工作..所以.. 第一种方法更好 ...我认为。