Is it possible to set custom caller or busy tone for blocked contacts using android?

Question

I have searched a lot but I am not getting any solution to end incoming call and play custom ringtone to caller.

Answer 1

How to programmatically answer/end a call in Android 4.1?

Answer the call with the help of post as above

Then play the audio file with "in call" mode as below

Trigger an audio file when call is answered

And then dont forget to mute the mic :) its just a work around cuz u really can't set an audio from within an app.. All you can do js forward a request to you simcard operator for a custom callertone