在Android上如何阅读NFC标签的唯一ID？

Tag mytag = (Tag) intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
Log.i("tag ID",mytag.getId().toString());

这给我一个ID如“[B @ 40521c40”,但这个ID改变每一个阅读.

任何帮助将不胜感激.

谢谢.

解决方法

您仍然需要将字节转换为字符串：

private String bytesToHexString(byte[] src) {
    StringBuilder stringBuilder = new StringBuilder("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.forDigit((src[i] >>> 4) & 0x0F,16);  
        buffer[1] = Character.forDigit(src[i] & 0x0F,16);  
        System.out.println(buffer);
        stringBuilder.append(buffer);
    }

    return stringBuilder.toString();
}