Android : data transfer through bluetooth in android

I have been following this Android guide for Bluetooth communication http://developer.android.com/guide/topics/connectivity/bluetooth.html

I want to send simple text from one to another device. Bluetooth chat example is complecate to understand. please give suggestion for simple code for understand.. I have managed to establish a connection between the two devices, but now I want to send data which I have not been able to do.

They give this code for data transfer:

private class ConnectedThread extends Thread {
        private final BluetoothSocket mmSocket;
        private final InputStream mmInStream;
        private final OutputStream mmOutStream;

        public ConnectedThread(BluetoothSocket socket) {
            Log.d(TAG, "create ConnectedThread");
            mmSocket = socket;
            InputStream tmpIn = null;
            OutputStream tmpOut = null;
            try {
                tmpIn = socket.getInputStream();
                tmpOut = socket.getOutputStream();
            } catch (IOException e) {
                Log.e(TAG, "temp sockets not created", e);
            }

            mmInStream = tmpIn;
            mmOutStream = tmpOut;
        }
        public void write(byte[] out) throws IOException {
            mmOutStream.write(out);
        }

        public void run() {
            final int BUFFER_SIZE = 1024;
            byte[] buffer = new byte[BUFFER_SIZE];
            int bytes = 0;

            // Keep listening to the InputStream while connected
            while (true) {
                try {
                    // Read from the InputStream
                   // bytes = mmInStream.read(buffer);
                    bytes = mmInStream.read(buffer, bytes, BUFFER_SIZE - bytes);

                   // Send the obtained bytes to the UI Activity
                //   mHandler.obtainMessage(BluetoothActivity.MESSAGE_READ, bytes, -1, buffer).sendToTarget();

                } catch (IOException e) {
                    Log.e(TAG, "disconnected", e);
                    connectionLost();
                    break;
                }
            }
        }