BluetoothService service = new BluetoothService(this, mHandler);

service.connect(device);

public synchronized void connect(BluetoothDevice device){

try {
        	for (Integer port = 1; port <= 3; port++) {
                
            
			mConnectThread = new ConnectThread(device, port);
			}

 mConnectThread.start();
}
private class ConnectThread extends Thread {

public ConnectThread(BluetoothDevice device, int port){
      mmDevice = device;
      BluetoothSocket tmp = null;
          
       Method m = device.getClass().getMethod("createRfcommSocket", new Class[] {int.class});
       tmp = (BluetoothSocket) m.invoke(device, 1);
			
				
        mmSocket = tmp;
  }      
public void run() {
     try {
                
                mmSocket.connect();
               
                
            } catch (IOException e) {}
       // Start the connected thread
        connected(mmSocket, mmDevice, mSocketType);
     }
}

private class ConnectedThread extends Thread {
    public ConnectedThread(BluetoothSocket socket, String socketType) {
      
     //Ruft zweite Activity auf
     BluetoothScann.verbunden();

   }
}

 BluetoothService service = new BluetoothService(this, mHandler);