我的NFC寫作應用程序不能寫入標籤

Question

對不起，再次問，我正在創建一個android應用程序將數據寫入標籤，它可以感應標籤並通過使用AAR自動打開，但是，它不能寫入數據填入EdiText列並點擊按鈕後，我已經嘗試了不同的方式，包括在layout.xml文件中聲明onclick動作，或者使用onclicklistener，但沒有一個可以工作，所以任何人都可以幫助我拍攝看看問題在哪裏？

public class Writer extends Activity{ 

NfcAdapter mAdapter; 
PendingIntent mPendingIntent; 
IntentFilter mWriteTagFilters[]; 
boolean mWriteMode; 
Tag detectedTag; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_writer); 
    Button btn = (Button) findViewById(R.id.button); 
    btn.setOnClickListener(new View.OnClickListener() 
     { 
      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 
       SetTag(); 
      } 
     }); 
    mAdapter = NfcAdapter.getDefaultAdapter(this); 
    mPendingIntent = PendingIntent.getActivity(this, 0, 
      new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0); 
    IntentFilter tagDetected = new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED); 
    mWriteTagFilters = new IntentFilter[] { tagDetected }; 
    //Intent intent = getIntent(); 

} 

private void enableTagWriteMode(){ 
    mWriteMode = true; 
    mAdapter.enableForegroundDispatch(this, mPendingIntent, mWriteTagFilters, null); 
} 

private void disableTagWriteMode(){ 
    mWriteMode = false; 
    mAdapter.disableForegroundDispatch(this); 
} 

public void SetTag(){ 
    EditText editText1 = (EditText) findViewById(R.id.edit_message1); 
    EditText editText2 = (EditText) findViewById(R.id.edit_message2); 
    String message1 = editText1.getText().toString(); 
    String message2 = editText2.getText().toString(); 
    byte[] textBytes1 = message1.getBytes(); 
    byte[] textBytes2 = message2.getBytes(); 
    NdefRecord textRecord1 = new NdefRecord(NdefRecord.TNF_WELL_KNOWN, 
      NdefRecord.RTD_TEXT, new byte[]{}, textBytes1); 
    NdefRecord textRecord2 = new NdefRecord(NdefRecord.TNF_WELL_KNOWN, 
      NdefRecord.RTD_TEXT, new byte[]{}, textBytes2); 
    NdefMessage mNdefMessage = new NdefMessage(
     new NdefRecord[]{ 
       textRecord1, 
       textRecord2, 
       NdefRecord.createApplicationRecord("android.reader") 
     } 
    ); 
    writeTag(mNdefMessage, detectedTag);  
} 

public static void writeTag(NdefMessage message, Tag tag){ 
    int size = message.toByteArray().length; 
    try { 
     Ndef ndef = Ndef.get(tag); 
     if (ndef != null){ 
      ndef.connect(); 
      if (ndef.isWritable() && ndef.getMaxSize() > size) 
       ndef.writeNdefMessage(message); 
      ndef.close(); 
     }else{ 
      NdefFormatable format = NdefFormatable.get(tag); 
      if (format != null) { 
       try { 
        format.connect(); 
        format.format(message); 
       }catch(IOException e){ 

       } 
      } 
     } 
    }catch(Exception e){ 

    } 
} 

@Override 
protected void onNewIntent(Intent intent){ 
    if(NfcAdapter.ACTION_TAG_DISCOVERED.equals(intent.getAction())) 
     detectedTag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);   
} 

@Override 
public void onPause(){ 
    super.onPause(); 
    disableTagWriteMode(); 
} 

@Override 
public void onResume(){ 
    super.onResume(); 
    enableTagWriteMode(); 
} 

/*@Override 
public void onClick(View v) { 
    // TODO Auto-generated method stub 
    EditText editText1 = (EditText) findViewById(R.id.edit_message1); 
    EditText editText2 = (EditText) findViewById(R.id.edit_message2); 
    String message1 = editText1.getText().toString(); 
    String message2 = editText2.getText().toString(); 
    byte[] textBytes1 = message1.getBytes(); 
    byte[] textBytes2 = message2.getBytes(); 
    NdefRecord textRecord1 = new NdefRecord(NdefRecord.TNF_WELL_KNOWN, 
      message1.getBytes(), new byte[]{}, textBytes1); 
    NdefRecord textRecord2 = new NdefRecord(NdefRecord.TNF_WELL_KNOWN, 
      message2.getBytes(), new byte[]{}, textBytes2); 
    NdefMessage mNdefMessage = new NdefMessage(
     new NdefRecord[]{ 
       textRecord1, 
       textRecord2, 
       NdefRecord.createApplicationRecord("android.reader") 
     } 
    ); 
    writeTag(mNdefMessage, detectedTag); 
}*/ 


} 

以下是layot文件：

<EditText android:id="@+id/edit_message1" 
    android:layout_weight="2" 
    android:layout_width="0dp" 
    android:layout_height="wrap_content" 
    android:hint="@string/edit_message1" /> 

<EditText android:id="@+id/edit_message2" 
    android:layout_weight="2" 
    android:layout_width="0dp" 
    android:layout_height="wrap_content" 
    android:hint="@string/edit_message2" /> 

<Button android:id="@+id/button" 
    android:layout_weight="1" 
    android:layout_width="0dp" 
    android:layout_height="wrap_content" 
    android:text="@string/button_send" /> 

</LinearLayout> 

最近我的代碼只能推出，但它不能將數據寫入標籤，從而在設備感再次標籤，它會打開這個應用程序，而不是我寫的另一個閱讀標籤應用程序

Answer 1

您的IntentFilter顯然不匹配，使ForegroundDispatch無法正常工作。 在您的onCreate()中，請嘗試添加tagDetected.addCategory(Intent.CATEGORY_DEFAULT);。我認爲這會做到這一點。