android - 如何读取 SD 卡 ID 号？

Question

如何以编程方式读取 SD 卡的 CID 寄存器，其中包含序列号和其他信息？我可以通过 Android Java 或 Native 代码来实现吗？

提前致谢，埃里克

Answer 1

这里是获取 SID 和 CID 的示例代码

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();
}