android 读取NFC序列号

Question

我手上有一个android系统的手持设备，有读取NFC功能，我想请问一下，NFC不都有一个唯一的序列号码。怎么读取这个序列号呀，很急，因为初学android所以希望有人可以帮我解决一下，谢谢

Answer 1

byte[] bytesId =intent.getByteArrayExtra(NfcAdapter.EXTRA_ID);
Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
byte[] dataId = tag.getId();
Log.e("dataId",dataId+"");
String strId = bytesToHexString(dataId);// 字符序列转换为16进制字符串
Log.e("strId",strId+"");
cardIdtext.setText(strId);

// 字符序列转换为16进制字符串
private String bytesToHexString(byte[] src) {

return bytesToHexString(src, true);

}

    private String bytesToHexString(byte[] src, boolean isPrefix) {  
        StringBuilder stringBuilder = new StringBuilder();  
        if (isPrefix == true) {  
            stringBuilder.append("0x");  
        }  
        if (src == null || src.length <= 0) {  
            return null;  
        }  
        char[] buffer = new char[2];  
        for (int i = 0; i < src.length; i++) {  
            buffer[0] = Character.toUpperCase(Character.forDigit(  
                    (src[i] >>> 4) & 0x0F, 16));  
            buffer[1] = Character.toUpperCase(Character.forDigit(src[i] & 0x0F,  
                    16));  
            System.out.println(buffer);  
            stringBuilder.append(buffer);  
        }  
        return stringBuilder.toString();  
    }
    public static boolean isNumeric(String str){

        Pattern pattern = Pattern.compile("[0-9]*");

        return pattern.matcher(str).matches();   

    }