在Android中阅读多个NFC标签.当屏幕解锁时,IsoDep-tag不会读取

我一直在尝试创建一个可以读取两种不同类型的NFC标签的应用程序.一个应该是HCE-IsoDep,在Nexus 5上模拟,一个是Ndef-tag.我遇到了一个小问题:

我设法读取两种类型的标签,但不是我想要的方式.Ndef标签完全没问题.当我尝试阅读我遇到问题的HCE标签时.我只能在手机打开时读取标签,我模拟标签打开(屏幕打开,但锁定打开).每当我解锁屏幕时,它就不会再进行交互了,据我所知,它试图反射.

如果我试图在没有它的情况下onNewIntent直接进行操作onTagDiscovered,那么在HCE设备被锁定和解锁时它都可以工作,但是我无法读取Ndef标签.在logcat中,我收到消息:NfcService LLCP Activation Message当我解锁时读取HCE标签.

当锁定我收到消息:NativeNfcTag Connect to a tag with a different handle(在此之前,我得到:audio_hw_primary select_devices: out_snd_device(2: speaker) in_snd_device(0: ))

我的代码如下:

主要:

public class NfcReader extends Activity implements OnMessageReceived {

private static String TAG = NfcReader.class.getSimpleName();

private Button sendButton;
private ProgressBar callProgress;


private NfcAdapter nfcAdapter;
private PendingIntent pIntent;
private IntentFilter[] writeTagFilters;
private String[][] mTechLists;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    TextView dateView = (TextView) findViewById(R.id.dateTextView);

    nfcAdapter = NfcAdapter.getDefaultAdapter(this);
    pIntent = PendingIntent.getActivity(this, 0, new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);

    IntentFilter tagDetected = new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED);
    writeTagFilters = new IntentFilter[] { tagDetected };

    mTechLists = new String[][] {new String[] {
            Ndef.class.getName(),
            IsoDep.class.getName()
    }};
}

@Override
protected void onPause() {
    super.onPause();
    disableForegroundMode();
}

@Override
protected void onResume() {
    super.onResume();
    enableForegroundMode();
}

public void enableForegroundMode() {
    Log.d(TAG, "onResume");
    nfcAdapter.enableForegroundDispatch(this, pIntent, writeTagFilters, mTechLists);
}

public void disableForegroundMode() {
    Log.d(TAG, "onPause");
    nfcAdapter.disableForegroundDispatch(this);
}

@Override
public void onNewIntent(Intent intent) {
    Log.d(TAG, "onNewIntent");

    if(NfcAdapter.ACTION_TAG_DISCOVERED.equals(intent.getAction())){

        Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
        Ndef nDef = Ndef.get(tag);

        if (nDef != null) {
            onNdefDiscovered(tag);
        }
        else {
            onTagDiscovered(tag);
        }
    }
}

public void onNdefDiscovered(Tag tag) {
    Log.d(TAG, "Ndef found");
    new ReadTag().execute(tag);
}

public void onTagDiscovered(Tag tag) {
    Log.d(TAG, "HCEfound"); 
    IsoDep isoDep = IsoDep.get(tag);
    IsoDepTransceiver transceiver = new IsoDepTransceiver(isoDep, this);
    transceiver.run();

}

@Override
public void onMessage(final byte[] message) {
    runOnUiThread(new Runnable() {

        @Override
        public void run() {
            String readFromHce = new String(message);
            TextView result = (TextView) findViewById(R.id.refTextView);
            result.setText(readFromHce);

        }
    });
}

@Override
public void onError(Exception exception) {
    onMessage(exception.getMessage().getBytes());
}
}

表现:

filter_nfc.xml

    
        android.nfc.tech.IsoDep
    

    
        android.nfc.tech.Ndef
    

有谁知道我做错了什么？我在没有找到解决方案的情况下搜索了很多.再说一遍.我可以毫无问题地阅读Ndef标签.当HCE设备上的屏幕被锁定时,我只能读取已验证的IsoDep标签.

感谢所有帮助
关心

编辑:以下代码正在运行

public class NfcReader extends Activity implements OnMessageReceived, ReaderCallback {

private static String TAG = NfcReader.class.getSimpleName();

private NfcAdapter nfcAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    TextView result = (TextView) findViewById(R.id.refTextView);

    nfcAdapter = NfcAdapter.getDefaultAdapter(this);
}

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

@Override
protected void onResume() {
    super.onResume();
    nfcAdapter.enableReaderMode(this, this, NfcAdapter.FLAG_READER_NFC_A, null);
}

public void onTagDiscovered(Tag tag) {
    Log.d(TAG, "Tag Found"); 

    Ndef nDef = Ndef.get(tag);
    IsoDep isoDep = IsoDep.get(tag);

    if (nDef != null) {
        new ReadTag().execute(tag);
    }
    else if (isoDep != null){
        IsoDepTransceiver transceiver = new IsoDepTransceiver(isoDep, this);
        transceiver.run();      
    }
}

@Override
public void onMessage(final byte[] message) {
    runOnUiThread(new Runnable() {

        @Override
        public void run() {
            String readFromHce = new String(message);
            TextView result = (TextView) findViewById(R.id.refTextView);
            result.setText(readFromHce);
        }
    });
}

@Override
public void onError(Exception exception) {
    onMessage(exception.getMessage().getBytes());
}
}

非常感谢NFC人员提示.