I need to know if there is any way (although I am almost convinced that there is no way) to detect when an outgoing call starts to ring on the destination phone.
What I need to know specifically is just THE INSTANT where the phone call starts on the other person's phone, and then, if possible, the duration of the phone call before it is attended or hung. The latter does not matter since I only need the time it is being stamped regardless of whether it is hung or hangs up.
I have been searching for google for a long time and the solutions they give are 0. I have also searched for SO in English, such as here and here , where I'm practically the only one who has given them answers saying it's impossible to do it (based on my experience and my research all over the internet ), but I would like to know if anyone from this community knows any way to do this.
This is another similar question, from SOes, and also without answers. What is asked in a more specific way, using the class
Visualizer and I ask from a more general point of view, that is by any way that exists.
Concluding, all the questions I have found on other sites on this subject are absolutely unanswered and I have not managed to find a way to achieve it. Please, if someone knows a way to do this, I would greatly appreciate it, since I have been dealing with this problem for a long time. Thanks for your attention. Greetings