Android : How to detect if a number is calling or not calling on android

i have this phone number i want to know whether its calling or is not.The confirmation that the phone is indeed on the other side is what i need and also if its not ringing on the other side.

Is there a way of knowing with certainty on android that a number is ringing or its not ringing?.

I am currently using this code to call a number

Intent callIntent = new Intent(Intent.ACTION_CALL);
                callIntent.setData(Uri.parse("tel:0377778888"));
                startActivity(callIntent);