private String SERVER_ADDR = "192.168.1.106"; // USB connected!
private int SERVER_PORT = 7777;
// Variables that are used for UI
private int systemProtocolVer = 0;
private String systemTemperature = "--";
private String systemLightLevel = "--";
// Internal application state and helper variables
private String messageFromNetworkThread = "";
private boolean connectedToServer = false;
//UI elements
private Button connectButton;
private ToggleButton Lamp1, Lamp2;
// Handler that will receive messages from NetworkTask final Handler uiHandler = new Handler();
//Network thread
private NetworkTask nt;
private String username = "";
private String password = "";

private void debug(String message) {
    Log.v("Akera", "main/ " + message);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Lamp1 = (ToggleButton) findViewById(R.id.toggleButton);
    Lamp1.setText("Lamp A");
    Lamp2 = (ToggleButton) findViewById(R.id.toggleButton2);
    Lamp2.setText("Lamp B");
    connectButton = (Button) findViewById(R.id.button);
    debug("Application loaded");
}

public void uiEventHandler(View v) {
    if (v == connectButton && !connectedToServer) {
        AlertDialog a = loginDialog(this, "Please enter your username and password:");
        a.show();
        debug("Connecting to " + SERVER_ADDR + ":" + SERVER_PORT);
    }
    //Connect button pressed,and we're connected -> disconnect
    else if (v == connectButton && connectedToServer) {
        debug("Disconnect button pressed");
        nt.alive = false;
        nt = null;
        connectedToServer = false;
        Lamp1.setEnabled(false);
        Lamp2.setEnabled(false);
        connectButton.setText("Connect");
    } else if (v == Lamp1) {
        Lamp1.setText("Lamp A");
        nt.messageQueued = BeagleProtocol.MT_RELAY_1;
        Toast.makeText(this, "Switching Lamp A",
                Toast.LENGTH_SHORT).show();
    } else if (v == Lamp2) {
        Lamp2.setText("Lamp B");
        nt.messageQueued = BeagleProtocol.MT_RELAY_2;
        Toast.makeText(this, "Switching Lamp B",
                Toast.LENGTH_SHORT).show();
    }
}

//Handler
@SuppressLint("HandlerLeak")
final Handler handler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
        Log.v("Akera", "handler/message received");
        Parcel p;
        switch (msg.what) {
            case BeagleProtocol.PROTOCOL_READ:
                p = (Parcel) msg.obj;
                systemProtocolVer = p.protocollevel;
                messageFromNetworkThread = "Server protocol version: " + Integer.toString(p.protocollevel);
                connectedToServer = true;
                break;
            /*case BeagleProtocol.REFRESH_DATA:
    Log.v("Akera", "handler/Temperature read");
    p = (Parcel) msg.obj;
    systemLightLevel = p.lightlevel;
    systemTemperature = p.temperature;
    messageFromNetworkThread = "Data refreshed";
    break;*/

            case BeagleProtocol.ACTION_TOGGLE_RELAY_1:
                debug("Toggle relay 1");
                break;
            case BeagleProtocol.ACTION_TOGGLE_RELAY_2:
                debug("Toggle relay 2");
                break;
            case BeagleProtocol.ACTION_INTERRUPT:
                Lamp1.setVisibility(View.GONE);
                debug("Interrupt occur");
                break;
            default:
                break;

        }
        //Schedule UI update
        uiHandler.post(uiHandlerRunnable);
    }


};
final Runnable uiHandlerRunnable = new Runnable() {
    public void run() {
        Log.v("Akera", "Updating the UI");
        if (messageFromNetworkThread != "") {
            debug(messageFromNetworkThread);
            messageFromNetworkThread = "";
        }
        if (connectedToServer) {
            connectButton.setText("Disconnect");
            Lamp1.setEnabled(true);
            Lamp2.setEnabled(true);
        }
        //temperatureState.setText(systemTemperature + "?C");
        //lightState.setText(systemLightLevel);
    }//run()
};//Internal Runnable


public AlertDialog loginDialog(Context c, String message) {
    //Inflate the login query window from resources
    LayoutInflater factory = LayoutInflater.from(c);
    final View textEntryView = factory.inflate(R.layout.password_query, null);
    //Set message and title, and button details
    AlertDialog.Builder alert = new AlertDialog.Builder(c);
    alert.setTitle("Login");
    alert.setMessage(message);
    alert.setView(textEntryView);
    alert.setPositiveButton("Login", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int whichButton) {
            final EditText usernameInput = textEntryView.findViewById(R.id.login_username_edittext);
            final EditText passwordInput = textEntryView.findViewById(R.id.login_password_edittext);
            //Get the text user entered
            username = usernameInput.getText().toString();
            password = passwordInput.getText().toString();
            new Thread(new Runnable() {
                public void run() {
                    nt = new NetworkTask(SERVER_ADDR, SERVER_PORT, handler, username + ":" + password);
                    uiHandlerRunnable.run();
                }

            }).start();
        }
    });
}

private class BeagleProtocol {
    public static final int ACTION_TOGGLE_RELAY_1 = ;
}