android über bt mit pc verbinden

public class ScanActivity extends ListActivity {


private static final int REQUEST_BT_ENABLE = 0x1;
        public static String EXTRA_DEVICE_ADDRESS = "device_address";
        ListView listGeraete;
        TextView text;
        BluetoothAdapter bluetoothAdapter;
        ArrayAdapter<String> arrayAdapter;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.list);
        bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        text = (TextView) findViewById(R.id.txt);
        ListView listGeraete = getListView();
        arrayAdapter = new ArrayAdapter<String>(ScanActivity.this,android.R.layout.simple_list_item_1);
        listGeraete.setAdapter(arrayAdapter);

// if bt disable, enabling
        if (!bluetoothAdapter.isEnabled()) {
            Intent enableBt = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableBt, REQUEST_BT_ENABLE);

        }


// start discovery

        bluetoothAdapter.startDiscovery();

        registerReceiver( ScanReceiver , new IntentFilter(
                BluetoothDevice.ACTION_FOUND)); 


    }

private final BroadcastReceiver ScanReceiver = new BroadcastReceiver() {
        public void onReceive(Context context, Intent intent) {
            text.setText("Die verfügbaren BT-Geräten sind:");
            String action = intent.getAction();


            if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                BluetoothDevice device = intent
                        .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                arrayAdapter.add(device.getName() + "\n" + device.getAddress());
                arrayAdapter.notifyDataSetChanged();
            }
        }
    };


    // select a device

    public void onListItemClick(ListView l, View view, int position, long id) {


        bluetoothAdapter.cancelDiscovery();
        String devicesinfo = ((TextView) view).getText().toString();
        String address = devicesinfo.substring(devicesinfo.length());


        Intent intent = new Intent();
        intent.putExtra(EXTRA_DEVICE_ADDRESS, address);


        setResult(Activity.RESULT_OK, intent);
        Toast.makeText(getApplicationContext(),"Connecting to " + devicesinfo + 
                address,
        Toast.LENGTH_SHORT).show();

    }

}