android---获取cpu核心个数

android获取cpu核心数代码如下

private int getNumCores()
    {
        // Private Class to display only CPU devices in the directory listing
        class CpuFilter implements FileFilter
        {
            @Override
            public boolean accept(File pathname)
            {
                // Check if filename is "cpu", followed by a single digit number
                if (Pattern.matches("cpu[0-9]", pathname.getName()))
                {
                    return true;
                }
                return false;
            }
        }

        try
        {
            // Get directory containing CPU info
            File dir = new File("/sys/devices/system/cpu/");
            // Filter to only list the devices we care about
            File[] files = dir.listFiles(new CpuFilter());
            // Return the number of cores (virtual CPU devices)
            return files.length;
        } catch (Exception e)
        {
            // Default to return 1 core
            return 1;
        }
    }