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.

如果我尝试在没有onNewIntent的情况下直接进入onTagDiscovered,它可以在HCE设备被锁定和解锁的同时工作,但是我无法读取Ndef标签.
在logcat中,当我解锁时读取HCE标签时,我收到消息：NfcService LLCP激活消息.

锁定时,我收到消息：NativeNfcTag连接到具有不同句柄的标记(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,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：

<uses-sdk
    android:minSdkVersion="19"
    android:targetSdkVersion="19" />

<uses-permission 
    android:name="android.permission.INTERNET" />

<uses-permission 
    android:name="android.permission.NFC" />

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

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
    <activity
        android:name=".HceReader"
        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"/>
            <action android:name="android.nfc.action.TECH_DISCOVERED"/>
            <action android:name="android.nfc.action.TAG_DISCOVERED" />
            <category android:name="android.intent.category.DEFAULT" />
            <data android:mimeType="text/plain" />
        </intent-filter>

        <Meta-data
            android:name="android.nfc.action.TECH_DISCOVERED"
            android:resource="@xml/filter_nfc"/>

filter_nfc.xml

<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">

    <tech-list>
        <tech>android.nfc.tech.IsoDep</tech>
    </tech-list>

    <tech-list>
        <tech>android.nfc.tech.Ndef</tech>
    </tech-list>
</resources>

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.

感谢任何帮助
问候

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.