doc-rj / smartcard-reader Goto Github PK

// reader mode flags: listen for type A (not B), skipping ndef check
    private static final int READER_FLAGS =
            NfcAdapter.FLAG_READER_NFC_A |NfcAdapter.FLAG_READER_NFC_B |
                    NfcAdapter.FLAG_READER_SKIP_NDEF_CHECK | NfcAdapter.FLAG_READER_NO_PLATFORM_SOUNDS;

  /**
     * Re-enable the tag dispatch if the app is in the foreground
     */
    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    @Override
    public void onResume() {
 super.onResume();
        // register broadcast receiver
        IntentFilter filter = new IntentFilter(NfcAdapter.ACTION_ADAPTER_STATE_CHANGED);
        this.registerReceiver(mBroadcastReceiver, filter);

        mAdapter = NfcAdapter.getDefaultAdapter(this);
        mAdapter.enableReaderMode(this,
                new NfcAdapter.ReaderCallback() {
                    @RequiresApi(api = Build.VERSION_CODES.O)
                    @Override
                    public void onTagDiscovered(final Tag t) {
                        // do something
                        tag = t;
                        startTransaction();
                    }
                },
                READER_FLAGS,
                null);

FATAL EXCEPTION: Thread-2237
Process: org.docrj.smartcard.reader, PID: 30330
java.lang.ExceptionInInitializerError
    at org.docrj.smartcard.emv.GpoApdu.getGpoApdu(GpoApdu.java:40)
    at org.docrj.smartcard.reader.PaymentReaderXcvr.initiateAppProcessing(PaymentReaderXcvr.java:169)
    at org.docrj.smartcard.reader.PaymentReaderXcvr.run(PaymentReaderXcvr.java:87)
    at java.lang.Thread.run(Thread.java:818)
 Caused by: java.lang.NullPointerException: in == null
    at java.util.Properties.load(Properties.java:246)
    at org.docrj.smartcard.emv.EMVTerminal.<clinit>(EMVTerminal.java:67)
    at org.docrj.smartcard.emv.GpoApdu.getGpoApdu(GpoApdu.java:40) 
    at org.docrj.smartcard.reader.PaymentReaderXcvr.initiateAppProcessing(PaymentReaderXcvr.java:169) 
    at org.docrj.smartcard.reader.PaymentReaderXcvr.run(PaymentReaderXcvr.java:87) 
    at java.lang.Thread.run(Thread.java:818)