how to detect if keyboard is showing or no?

I am showing and hiding the keyboard after certain events. Now i want to know how to detect from code if the keyboard is up/showing or no. I tried the following but none work?

InputMethodManager imm = (InputMethodManager)getActivity().getSystemService(
                 Context.INPUT_METHOD_SERVICE);
 imm.isAcceptingText();
 imm.isActive();