Android应用程序可在NFC标签中添加多个记录

大家好,我是开发android应用程序的初学者,目前我需要将一些数据写入NFC标签以检查自己的NFC阅读器程序,但是,我可以尝试的那些应用程序只能将一个记录写入标签中,但记录不匹配由于我要求里面有几条记录,最后要有一条AAR记录,所以我想问是否有人知道可以提供此功能的任何应用程序,或者有人曾经写过这样的程序？谢谢！

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);
    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 };

    //enableTagWriteMode();
    //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(View view){
    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);    
}

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);
        }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(mWriteMode && 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();
}


}

解决方法:

您需要在清单文件中为应用程序NFC提供支持.

标签：ndef,android,nfc
来源： https://codeday.me/bug/20191012/1901766.html