如何使用nfc(android studio)获取卡号

<uses-permission android:name="android.permission.NFC" />
<uses-feature android:name="android.hardware.nfc" android:required="true" />

public class NFCReaderActivity extends AppCompatActivity {
    private NfcAdapter nfcAdapter;
    private PendingIntent pendingIntent;
    private IntentFilter[] intentFiltersArray;
    private String[][] techListsArray;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_nfc_reader);

        nfcAdapter = NfcAdapter.getDefaultAdapter(this);
        if (nfcAdapter == null) {
            // 设备不支持NFC
            finish();
            return;
        }

        pendingIntent = PendingIntent.getActivity(
                this, 0, new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
        IntentFilter ndefIntent = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);
        try {
            ndefIntent.addDataType("*/*");
        } catch (IntentFilter.MalformedMimeTypeException e) {
            throw new RuntimeException("fail", e);
        }
        intentFiltersArray = new IntentFilter[] { ndefIntent };
        techListsArray = new String[][] { new String[] { NfcA.class.getName() } };
    }

    @Override
    protected void onResume() {
        super.onResume();
        nfcAdapter.enableForegroundDispatch(this, pendingIntent, intentFiltersArray, techListsArray);
    }

    @Override
    protected void onPause() {
        super.onPause();
        nfcAdapter.disableForegroundDispatch(this);
    }

    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(intent.getAction())) {
            Parcelable[] rawMessages = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
            if (rawMessages != null) {
                NdefMessage[] messages = new NdefMessage[rawMessages.length];
                for (int i = 0; i < rawMessages.length; i++) {
                    messages[i] = (NdefMessage) rawMessages[i];
                }
                // 处理NDEF消息
                processNdefMessages(messages);
            }
        }
    }

    private void processNdefMessages(NdefMessage[] messages) {
        for (NdefMessage message : messages) {
            for (NdefRecord record : message.getRecords()) {
                byte[] payload = record.getPayload();
                String cardNumber = new String(payload, StandardCharsets.UTF_8).trim();
                // 处理卡号
                Log.d("NFCReader", "Card Number: " + cardNumber);
            }
        }
    }
}