ArduinoBluetoothAndroid

package com.example.myApp;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ToggleButton;

public class Main extends Activity implements OnClickListener {

    Button Connect;
    ToggleButton OnOff;
    TextView Result;
    private String dataToSend;

    private static final String TAG = "Jon";
    private BluetoothAdapter mBluetoothAdapter = null;
    private BluetoothSocket btSocket = null;
    private OutputStream outStream = null;
    private static String address = "XX:XX:XX:XX:XX:XX";
    private static final UUID MY_UUID = UUID
            .fromString("00001101-0000-1000-8000-00805F9B34FB");
    private InputStream inStream = null;
    Handler handler = new Handler();
    byte delimiter = 10;
    boolean stopWorker = false;
    int readBufferPosition = 0;
    byte[] readBuffer = new byte[1024];

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Connect = (Button) findViewById(R.id.connect);
        OnOff = (ToggleButton) findViewById(R.id.tgOnOff);
        Result = (TextView) findViewById(R.id.msgJonduino);

        Connect.setOnClickListener(this);
        OnOff.setOnClickListener(this);

        CheckBt();
        BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
        Log.e("Jon", device.toString());

    }

    @Override
    public void onClick(View control) {
        switch (control.getId()) {
        case R.id.connect:
                Connect();
            break;
        case R.id.tgOnOff:
            if (OnOff.isChecked()) {
                dataToSend = "1";
                writeData(dataToSend);
            } else if (!OnOff.isChecked()) {
                dataToSend = "0";
                writeData(dataToSend);
            }
            break;
        }
    }

    private void CheckBt() {
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

        if (!mBluetoothAdapter.isEnabled()) {
            Toast.makeText(getApplicationContext(), "Bluetooth Disabled !",
                    Toast.LENGTH_SHORT).show();
        }

        if (mBluetoothAdapter == null) {
            Toast.makeText(getApplicationContext(),
                    "Bluetooth null !", Toast.LENGTH_SHORT)
                    .show();
        }
    }

        public void Connect() {
            Log.d(TAG, address);
            BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
            Log.d(TAG, "Connecting to ... " + device);
            mBluetoothAdapter.cancelDiscovery();
            try {
                btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
                btSocket.connect();
                Log.d(TAG, "Connection made.");
            } catch (IOException e) {
                try {
                    btSocket.close();
                } catch (IOException e2) {
                    Log.d(TAG, "Unable to end the connection");
                }
                Log.d(TAG, "Socket creation failed");
            }

            beginListenForData();
        }

    private void writeData(String data) {
        try {
            outStream = btSocket.getOutputStream();
        } catch (IOException e) {
            Log.d(TAG, "Bug BEFORE Sending stuff", e);
        }

        String message = data;
        byte[] msgBuffer = message.getBytes();

        try {
            outStream.write(msgBuffer);
        } catch (IOException e) {
            Log.d(TAG, "Bug while sending stuff", e);
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

            try {
                btSocket.close();
            } catch (IOException e) {
            }
    }

    public void beginListenForData()   {
         try {
                inStream = btSocket.getInputStream();
            } catch (IOException e) {
            }

            Thread workerThread = new Thread(new Runnable()
            {
                public void run()
                {
                   while(!Thread.currentThread().isInterrupted() && !stopWorker)
                   {
                        try
                        {
                            int bytesAvailable = inStream.available();
                            if(bytesAvailable > 0)
                            {
                                byte[] packetBytes = new byte[bytesAvailable];
                                inStream.read(packetBytes);
                                for(int i=0;i<bytesAvailable;i++)
                                {
                                    byte b = packetBytes[i];
                                    if(b == delimiter)
                                    {
                                        byte[] encodedBytes = new byte[readBufferPosition];
                                        System.arraycopy(readBuffer, 0, encodedBytes, 0, encodedBytes.length);
                                        final String data = new String(encodedBytes, "US-ASCII");
                                        readBufferPosition = 0;
                                        handler.post(new Runnable()
                                        {
                                            public void run()
                                            {

                                                if(Result.getText().toString().equals("..")) {
                                                    Result.setText(data);
                                                } else {
                                                    Result.append("\n"+data);
                                                }

                                                /* You also can use Result.setText(data); it won't display multilines
                                                */

                                            }
                                        });
                                    }
                                    else
                                    {
                                        readBuffer[readBufferPosition++] = b;
                                    }
                                }
                            }
                        }
                        catch (IOException ex)
                        {
                            stopWorker = true;
                        }
                   }
                }
            });

            workerThread.start();
        }
}