计算两点的距离 经典网页以及得到内存信息

http://www.movable-type.co.uk/scripts/latlong.html 这个网站可以计算两点距离 也可以自动生成距离相当好

 

ActivityManager activityManager = = (ActivityManager) getSystemService(ACTIVITY_SERVICE); 
MemoryInfo mi = new MemoryInfo(); 
activityManager.getMemoryInfo(mi); 
Log.i("memory free", "" + mi.availMem);