我正在使用该代码，但没有任何反应，此代码有什么问题。它正在运行并且没有显示任何错误。我必须将标签从一台设备共享到另一台设备。
请分享一些代码，用于将标签从一台设备共享到另一台设备。
package com.app.app.nfctag;
import java.nio.charset.Charset;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.Intent;
import android.content.IntentFilter;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.os.Bundle;
import android.os.Parcelable;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class DemoNFCtagActivity extends Activity {
NdefMessage msg;
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(getIntent().getAction())) {
processIntent(getIntent());
}
mNfcAdapter.enableForegroundNdefPush(this,msg );
}
@Override
public void onNewIntent(Intent intent) {
// onResume gets called after this to handle the intent
setIntent(intent);
}
NfcAdapter mNfcAdapter;
TextView textView;
Button btnEmulation;
PendingIntent mNfcPendingIntent;
IntentFilter[] mNdefExchangeFilters;
NdefMessage message;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// TextView textView = (TextView) findViewById(R.id.textView);
// Check for available NFC Adapter
mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
if (mNfcAdapter == null) {
Toast.makeText(this, "NFC is not available", Toast.LENGTH_LONG).show();
finish();
return;
}
// Register callback
// mNfcAdapter.setNdefPushMessageCallback(this, this);
String text = ("Beam me up, Android!\n\n" +
"Beam Time: " + System.currentTimeMillis());
msg = new NdefMessage(
new NdefRecord[] { createMimeRecord(
"application/com.example.android.beam", text.getBytes())
/**
* The Android Application Record (AAR) is commented out. When a device
* receives a push with an AAR in it, the application specified in the AAR
* is guaranteed to run. The AAR overrides the tag dispatch system.
* You can add it back in to guarantee that this
* activity starts when receiving a beamed message. For now, this code
* uses the tag dispatch system.
*/
//,NdefRecord.createApplicationRecord("com.example.android.beam")
});
}
public NdefRecord createMimeRecord(String mimeType, byte[] payload) {
byte[] mimeBytes = mimeType.getBytes(Charset.forName("US-ASCII"));
NdefRecord mimeRecord = new NdefRecord(
NdefRecord.TNF_MIME_MEDIA, mimeBytes, new byte[0], payload);
return mimeRecord;
}
void processIntent(Intent intent) {
textView = (TextView) findViewById(R.id.textView);
Parcelable[] rawMsgs = intent.getParcelableArrayExtra(
NfcAdapter.EXTRA_NDEF_MESSAGES);
// only one message sent during the beam
NdefMessage msg = (NdefMessage) rawMsgs[0];
// record 0 contains the MIME type, record 1 is the AAR, if present
textView.setText(new String(msg.getRecords()[0].getPayload()));
}
}