android 获取cpu序列

public static String getCPUSerial() {
        String str = "", strCPU = "", cpuAddress = "0000000000000000";
        try {
                //读取CPU信息
                Process pp = Runtime.getRuntime().exec("cat /proc/cpuinfo");
                InputStreamReader ir = new InputStreamReader(pp.getInputStream());
                LineNumberReader input = new LineNumberReader(ir);
                //查找CPU序列号
                for (int i = 1; i < 100; i++) {
                        str = input.readLine();
                        if (str != null) {
                                //查找到序列号所在行
                                if (str.indexOf("Serial") > -1) {
                                        //提取序列号
                                        strCPU = str.substring(str.indexOf(":") + 1,
                                                        str.length());
                                        //去空格
                                        cpuAddress = strCPU.trim();
                                        break;
                                }
                        }else{
                                //文件结尾
                                break;
                        }
                }
        } catch (IOException ex) {
                //赋予默认值
                ex.printStackTrace();
        }
        return cpuAddress;
}