我如何编程读取SD卡的CID寄存器，它包含一个序列号和其他信息？我能做到这一点通过Android的Java或本地code？

How can I programatically read the SD Card's CID register, which contains a Serial Number and other information? Can I do it through Android Java, or Native code?

在此先感谢， 埃里克

推荐答案

下面是一个示例code获取SID和CID

Here is sample code for getting SID and CID

if (isExteranlStorageAvailable()) {
    try {
        File input = new File("/sys/class/mmc_host/mmc1");
        String cid_directory = null;
        int i = 0;
        File[] sid = input.listFiles();

        for (i = 0; i < sid.length; i++) {
            if (sid[i].toString().contains("mmc1:")) {
                cid_directory = sid[i].toString();
                String SID = (String) sid[i].toString().subSequence(
                        cid_directory.length() - 4,
                        cid_directory.length());
                Log.d(TAG, " SID of MMC = " + SID);
                break;
            }
        }
        BufferedReader CID = new BufferedReader(new FileReader(
                cid_directory + "/cid"));
        String sd_cid = CID.readLine();
        Log.d(TAG, "CID of the MMC = " + sd_cid);

    } catch (Exception e) {
        Log.e("CID_APP", "Can not read SD-card cid");
    }

} else {
    Toast.makeText(this, "External Storage Not available!!",
            Toast.LENGTH_SHORT).show();
}