Problems with Reflection for createRfcommSocket
Method m = mmDevice.getClass().getMethod("createRfcommSocket", new Class[] {int.class});
mmSocket = (BluetoothSocket) m.invoke(mmDevice, Integer.valueOf(1));

mmSocket = mmDevice.createRfcommSocketToServiceRecord(SerialPortServiceClass_UUID);

if(level<=1){
success set level = 1
fail set level = 0
}

if(level<=2){
success set level = 2
fail set level = 0
}

...


if(level<=4){
success set level = 4
fail set level = 0
}