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copied!<p>I implemented that with sucess after a relevant amount of work, during the path i faced some tricky bugs, for instance I had to implement a Handshake protocol(something like <a href="http://en.wikipedia.org/wiki/Handshaking" rel="nofollow">that</a>) to avoid timeout problem during a connection attempt.</p> <p>Well, I started looking at the BluetoothChat example(Android SDK Sample), that implements communication between 2 devices. So, I modified that, to permit multiple connections. As the code became large, i will just tell you the approach I have used.</p> <p>Basically, all devices running my app can be a server or client. So each one, has always a BluetoothServerSocket(AcceptThread) running, so in this way, each device is always able to receive a request connection.</p> <p>A device that wants to connect, starts a ConnectThread, this thread it is started after a discovery process or if it choose BluetoothDevice of PairedDevices <a href="http://developer.android.com/reference/android/bluetooth/BluetoothAdapter.html#getBondedDevices%28%29" rel="nofollow">Using getBondedDevices</a>.</p> <p>When a connection is established, I create a new Thread(ConnectedThread) that represents that connection. If you want to has different behavior that depends of you device role(master or slave) you can have a ConnectedThread subclass like MasterThread and SlaveThread</p> <p>The Android Documentation has a good explanation of how to work with Bluetooth at: <a href="http://developer.android.com/guide/topics/connectivity/bluetooth.html" rel="nofollow">http://developer.android.com/guide/topics/connectivity/bluetooth.html</a></p>

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