Problems with BluetoothServerSocket.accept () returning unbound BluetoothSocket

I am working on an Android application (EDIT1: development on 4.0.3 on Nexsus S) that shares P2P data via Bluetooth and has an unpleasant odor when connecting two devices. In our NFC application, the MAC address of one device is transmitted to another. The sender then creates an instance of the BlueToothServer socket and calls accept, while the receiver creates an instance of BluetoothDevice with the accepted MAC address and tries to connect.

The problem we are facing is to return the BluetoothSocket from accept (). The documentation for him clearly states that it should return a connected socket, but instead returns a disconnected socket that cannot be connected by calling connect (). I checked the MAC address that the socket has and it is cleared, and only the fact that accept () is returned means that it is successfully connected long enough to make the socket, so I don’t understand what else to try.

It is also worth noting that the BluetoothSocket receiver during this time claims to be connected. Obviously, it just hangs while it waits for data that never comes from another device, but using breakpoints in several places, we know that until that time it always claims to be connected.

Any help or advice on this will be appreciated.

Other relevant information:

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:

String s = new String(msg.getRecords()[0].getPayload());
otherBluetoothMACAddress = s;
Log.d(DEV, "WaitingToGetGame: Other BT Address... "
    + otherBluetoothMACAddress);


Toast.makeText(getApplicationContext(), s, Toast.LENGTH_LONG).show();

Log.d(DEV, "WaitingToGetGame: Getting remote device");
BluetoothDevice bluetoothDevice = bluetoothAdapter
    .getRemoteDevice(otherBluetoothMACAddress);

ObjectInputStream objectInputStream;
ObjectOutputStream objectOutputStream;


try
{
  Log.d(DEV, "WaitingToGetGame: Getting BluetoothSocket");
  bluetoothSocket = bluetoothDevice
      .createInsecureRfcommSocketToServiceRecord(SDP_UUID);

  Log.d(DEV, "WaitingToGetGame: Connecting...");
  bluetoothSocket.connect();

  Log.d(DEV,
      "WaitingToGetGame: Bluetooth "
          + ((bluetoothSocket.isConnected()) ? ("is ") : ("is NOT "))
          + "Connected.");

  Log.d(DEV, "WaitingToGetGame: Getting input stream");
  bluetoothInputStream = bluetoothSocket.getInputStream();

  Log.d(DEV,
      "WaitingToGetGame: Bluetooth "
          + ((bluetoothSocket.isConnected()) ? ("is ") : ("is NOT "))
          + "Connected.");
  Log.d(DEV, "WaitingToGetGame: Getting output stream");
  bluetoothOutputStream = bluetoothSocket.getOutputStream();

  Log.d(DEV,
      "WaitingToGetGame: Bluetooth "
          + ((bluetoothSocket.isConnected()) ? ("is ") : ("is NOT "))
          + "Connected.");
  objectInputStream = new ObjectInputStream(bluetoothInputStream);
  objectOutputStream = new ObjectOutputStream(bluetoothOutputStream);

  Log.d(DEV, this.getClass().getSimpleName() + ": Receiving game data");
  game = (Game) objectInputStream.readObject();

  Log.d(DEV, this.getClass().getSimpleName() + ": Sending acknowledgment.");
  objectOutputStream.writeObject(new Boolean(true));
  objectInputStream.close();
  objectOutputStream.close();
  bluetoothInputStream.close();
  bluetoothOutputStream.close();
  bluetoothInputStream = null; // GC
  bluetoothOutputStream = null; // GC
  bluetoothSocket.close();
  bluetoothSocket = null;

:

BluetoothServerSocket bluetoothServerSocket = null;
ObjectInputStream objectInputStream;
ObjectOutputStream objectOutputStream;

try
{

  Log.d(DEV, this.getClass().getSimpleName()
      + ": Getting BluetoothServerSocket");
  // bluetoothServerSocket = bluetoothAdapter
  // .listenUsingRfcommWithServiceRecord(user.getName(), SDP_UUID);
  bluetoothServerSocket = bluetoothAdapter
      .listenUsingInsecureRfcommWithServiceRecord(user.getName(), SDP_UUID);

  Log.d(DEV, this.getClass().getSimpleName() + ": Waiting for connection.");
  bluetoothSocket = bluetoothServerSocket.accept();
  bluetoothServerSocket.close();
  BluetoothDevice dev = bluetoothSocket.getRemoteDevice();
  Log.d(DEV, dev.getAddress());

  Log.d(DEV, this.getClass().getSimpleName() + ": Bluetooth "
      + ((bluetoothSocket.isConnected()) ? ("is ") : ("is NOT "))
      + "Connected.");
  // At this point bluetoothSocket should be ready to use.

  Log.d(DEV, this.getClass().getSimpleName() + ": Getting input stream");
  bluetoothInputStream = bluetoothSocket.getInputStream();

  Log.d(DEV, this.getClass().getSimpleName() + ": Bluetooth "
      + ((bluetoothSocket.isConnected()) ? ("is ") : ("is NOT "))
      + "Connected.");


  Log.d(DEV, this.getClass().getSimpleName() + ": Getting output stream");
  bluetoothOutputStream = bluetoothSocket.getOutputStream();

  // Log.d(DEV, this.getClass().getSimpleName()
  // + ": Attempting direct connect()");
  // bluetoothSocket.connect();

  objectInputStream = new ObjectInputStream(bluetoothInputStream);
  objectOutputStream = new ObjectOutputStream(bluetoothOutputStream);


  Log.d(DEV, this.getClass().getSimpleName() + ": Sending game data.");
  objectOutputStream.writeObject(game);

  Log.d(DEV, this.getClass().getSimpleName() + ": Waiting for response.");
  Boolean response = (Boolean) objectInputStream.readObject();

  objectInputStream.close();
  objectOutputStream.close();
  bluetoothInputStream.close();
  bluetoothOutputStream.close();
  bluetoothInputStream = null; // GC
  bluetoothOutputStream = null; // GC
  bluetoothSocket.close();
  bluetoothSocket = null;
}// try
catch( IOException e )
{
  Log.d(
      DEV,
      this.getClass().getSimpleName() + ": "
          + java.util.Arrays.toString(e.getStackTrace()));
  e.printStackTrace();
  return;
}
catch( ClassNotFoundException e )
{
  // TODO Auto-generated catch block
  e.printStackTrace();
}