如何在android中启动两个nfc设备之间的仿真

Question

我必须从一个设备到另一个设备共享标签，我有android 2.3.3 galaxy。请与我分享一些代码，以便在一台设备与另一台设备之间共享标签。

我已经从开发者网站上获取了这段代码，但它在中显示了错误

 mNfcAdapter.setNdefPushMessageCallback(this, this);

  // 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);

现在我正在使用enable-foround消息，但它工作得很好，但如何查看模拟。。

public class DemoNFCtagActivity extends Activity {
    NdefMessage msg;
    @Override
    protected void onResume() {
        // TODO Auto-generated method stub
        super.onResume();
           mNfcAdapter.enableForegroundNdefPush(this,msg );
    }
    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!nn" +
                "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;
    }
}

Answer 1

NfcAdapter.setNdefPushMessageCallback()仅在Android 4.0 ICS及更高版本中可用。请改用enableForegroundNdefPush()。