Почему мой Android NF C сканер не работает

Question

Я прочитал много постов, связанных со сканированием NF C на Android, но я не могу заставить его работать. Функция onNewIntent никогда не запускается моим примером приложения.

В моей деятельности у меня есть следующий код:

//The array lists to hold our messages
private ArrayList<String> messagesToSendArray = new ArrayList<>();
private ArrayList<String> messagesReceivedArray = new ArrayList<>();

//Text boxes to add and display our messages
private EditText txtBoxAddMessage;
private TextView txtReceivedMessages;
private TextView txtMessagesToSend;

private NfcAdapter mNfcAdapter;

public void addMessage(View view) {
    String newMessage = txtBoxAddMessage.getText().toString();
    messagesToSendArray.add(newMessage);

    txtBoxAddMessage.setText(null);
    updateTextViews();

    Toast.makeText(this, "Added Message", Toast.LENGTH_LONG).show();
}


private  void updateTextViews() {
    txtMessagesToSend.setText("Messages To Send:\n");
    //Populate Our list of messages we want to send
    if(messagesToSendArray.size() > 0) {
        for (int i = 0; i < messagesToSendArray.size(); i++) {
            txtMessagesToSend.append(messagesToSendArray.get(i));
            txtMessagesToSend.append("\n");
        }
    }

    txtReceivedMessages.setText("Messages Received:\n");
    //Populate our list of messages we have received
    if (messagesReceivedArray.size() > 0) {
        for (int i = 0; i < messagesReceivedArray.size(); i++) {
            txtReceivedMessages.append(messagesReceivedArray.get(i));
            txtReceivedMessages.append("\n");
        }
    }
}

//Save our Array Lists of Messages for if the user navigates away
@Override
public void onSaveInstanceState(@NonNull Bundle savedInstanceState) {
    super.onSaveInstanceState(savedInstanceState);
    savedInstanceState.putStringArrayList("messagesToSend", messagesToSendArray);
    savedInstanceState.putStringArrayList("lastMessagesReceived",messagesReceivedArray);
}

//Load our Array Lists of Messages for when the user navigates back
@Override
public void onRestoreInstanceState(@NonNull Bundle savedInstanceState) {
    super.onRestoreInstanceState(savedInstanceState);
    messagesToSendArray = savedInstanceState.getStringArrayList("messagesToSend");
    messagesReceivedArray = savedInstanceState.getStringArrayList("lastMessagesReceived");
}



private PendingIntent mPendingIntent;

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

    txtBoxAddMessage = (EditText) findViewById(R.id.txtBoxAddMessage);
    txtMessagesToSend = (TextView) findViewById(R.id.txtMessageToSend);
    txtReceivedMessages = (TextView) findViewById(R.id.txtMessagesReceived);
    Button btnAddMessage = (Button) findViewById(R.id.buttonAddMessage);

    btnAddMessage.setText("Add Message");
    updateTextViews();

    //Check if NFC is available on device
    mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
    if(mNfcAdapter != null) {
        //Handle some NFC initialization here
    }
    else {
        Toast.makeText(this, "NFC not available on this device",
                Toast.LENGTH_SHORT).show();
    }


    //Check if NFC is available on device
    mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
    if(mNfcAdapter != null) {
        //This will refer back to createNdefMessage for what it will send
        mNfcAdapter.setNdefPushMessageCallback(this, this);

        //This will be called if the message is sent successfully
        mNfcAdapter.setOnNdefPushCompleteCallback(this, this);
    }


    mPendingIntent = PendingIntent.getActivity(this, 0, new Intent(this,
            getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);


    this.onNewIntent(getIntent());
}

@Override
protected void onResume() {
    super.onResume();
    mNfcAdapter.enableForegroundDispatch(this, mPendingIntent, null, null);
}

@Override
protected void onPause() {
    super.onPause();
    if (mNfcAdapter != null) {
        mNfcAdapter.disableForegroundDispatch(this);
    }
}

@Override
public NdefMessage createNdefMessage(NfcEvent nfcEvent) {
    //This will be called when another NFC capable device is detected.
    if (messagesToSendArray.size() == 0) {
        return null;
    }
    //We'll write the createRecords() method in just a moment
    NdefRecord[] recordsToAttach = createRecords();
    //When creating an NdefMessage we need to provide an NdefRecord[]
    return new NdefMessage(recordsToAttach);
}

@Override
public void onNdefPushComplete(NfcEvent nfcEvent) {
    //This is called when the system detects that our NdefMessage was
    //Successfully sent.
    messagesToSendArray.clear();
}

public NdefRecord[] createRecords() {
    NdefRecord[] records = new NdefRecord[messagesToSendArray.size()];

    for (int i = 0; i < messagesToSendArray.size(); i++){

        byte[] payload = messagesToSendArray.get(i).
                getBytes(StandardCharsets.UTF_8);

        NdefRecord record = new NdefRecord(
                NdefRecord.TNF_WELL_KNOWN,  //Our 3-bit Type name format
                NdefRecord.RTD_TEXT,        //Description of our payload
                new byte[0],                //The optional id for our Record
                payload);                   //Our payload for the Record

        records[i] = record;
    }
    return records;
}


@Override
protected void onNewIntent(Intent intent) {
    Log.e("TAG", "onNewIntent: "+intent.getAction());
    super.onNewIntent(intent);
}

Это мой манифест:

<?xml version="1.0" encoding="utf-8"?>

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

<application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >



    <activity
            android:launchMode="singleTask"
            android:name="com.banalapps.nfcmesssenger.MainActivity"
            android:label="@string/app_name" >

        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>

        <intent-filter>
            <action android:name="android.nfc.action.NDEF_DISCOVERED" />
            <category android:name="android.intent.category.DEFAULT"/>
            <data android:mimeType="text/plain" />
        </intent-filter>
    </activity>
</application>

Я знаю, что это, вероятно, дубликат, но любая помощь будет принята с благодарностью, так как я несколько дней пытался сделать эту работу.