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

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

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