This is part of large project.
We need android service with such functionality:
during call on screen appears a button. When user press it it calls special function Process() without parametrs.
if the function returns True, we neeed to turn off microphone and input. And then play some sound. (usual ringtone by default)
Thanks for posting the project on Freelancer, the project requirements completely falls under our domain and where this project exactly matches with our technical strengths and our abilities to deliver the work on time. We have gone through the requirement and have a sound team that has expertise in this type of development. Kindly see your PMB