http://blog.synchack.com/2012/02/proccpuinfoprocess.html

getRawCpuinfo_old.java

String getRawCpuinfo_old() {

    String ret = "";
    InputStream in = null;
    byte[] buf = new byte[4096];

    try {
        String[] args = {
                "/system/bin/cat", "/proc/cpuinfo"
        };

        Process process = new ProcessBuilder(args).start();
        in = process.getInputStream();

        int len = in.read(buf);
        if (len > 0) {
            ret = new String(buf, 0, len);
        }
    } catch (IOException ioe) {
        // ioe.printStackTrace();
    } finally {
        try {
            if (in != null) {
                in.close();
            }
        } catch (IOException ioe) {
            // ioe.printStackTrace();
        }
    }
    return ret;
}