Передача данных через Intent

        listAdapter = new ArrayAdapter<BluetoothDevice>(getBaseContext(), android.R.layout.simple_list_item_1, discoveredDevices) {
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                View view = super.getView(position, convertView, parent);
                final BluetoothDevice device = getItem(position);
                ((TextView) view.findViewById(android.R.id.text1)).setText(device.getName());
                return view;
            }
        };
        setListAdapter(listAdapter);

        BluetoothDevice deviceSelected = discoveredDevices.get(position);
 
        Intent ChatActIntent = new Intent(this, ChatActivity.class);
        ChatActIntent.putExtra("DeviceName",deviceSelected.getName().toString());  //берем имя для TextView (работает)
        ChatActIntent.putExtra("Device", deviceSelected);
        startActivity(ChatActIntent);

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.chat_activity);
 
        textData = (TextView) findViewById(R.id.data_text);
        textMessage = (EditText) findViewById(R.id.message_text);
        sendButton = (Button) findViewById(R.id.BtnSendMain);
        deviceName = (TextView)findViewById(R.id.deviceName);
 
        Intent ChatActIntent = getIntent();
        String DeviceName = ChatActIntent.getStringExtra("DeviceName");
        String DeviceSelected = ChatActIntent.getStringExtra("Device");
 
        deviceName.setText("to: "+ DeviceName);
 
        startChat();
 
    }
 
    void startChat(){
        clientThread = new ClientThread(deviceSelected, communicatorService);  //DeviceSelected подчеркивает красным
        clientThread.start();
    }
 
    private final CommunicatorService communicatorService = new CommunicatorService() {
        @Override
        public Communicator createCommunicatorThread(BluetoothSocket socket) {
            return new CommunicatorImpl(socket, new CommunicatorImpl.CommunicationListener() {
                @Override
                public void onMessage(final String message) {
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            textData.setText(textData.getText().toString() + "\n" + message);
                            Log.d("ChatActivity", "Receive message");
                        }
                    });
                }
            });
        }
    };

clientThread = new ClientThread(DeviceSelected, communicatorService);