/** * Gets the number of cores available in this device, across all processors. * Requires: Ability to peruse the filesystem at "/sys/devices/system/cpu" * @return The number of cores, or 1 if failed to get result */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;    }}

参考http://stackoverflow.com/questions/7962155/how-can-you-detect-a-dual-core-cpu-on-an-android-device-from-code