How to know a incomming call Xamarin iOS

Question

Hello, I have a requirement that I must validate if there is a call (normal or VoIP), for Xamarin Android I have:

public bool InCall() {
            var theAudioManager = (AudioManager)Android.App.Application.Context.GetSystemService(Android.Content.Context.AudioService);
            if (theAudioManager.Mode == Mode.InCall || theAudioManager.Mode == Mode.InCommunication) {
                return true;
            } else {
                return false;
            }
        }

Is there a way to do the same on iOS? I have read CallKit but my application does not need to make calls, only to know if there is a call (normal or VoIP)

Answer 1

Hello,

If your app is playing an audio/video, you can receive the AVAudioSession.InterruptionNotification, and do something in its callback method. And you cannot detect the system-event if your app is not playing an audio/video.

Please refer to the following code:

 var player = new AVPlayer(new NSUrl("https://XXXXX"));
 player.Play();

       NSNotificationCenter.DefaultCenter.AddObserver(
        AVAudioSession.InterruptionNotification, (notification) =>
        {
           var okAlertController = UIAlertController.Create("Title", "The message", UIAlertControllerStyle.Alert);
            okAlertController.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
           // Present Alert for testing           UIApplication.SharedApplication.Delegate.GetWindow().RootViewController.PresentViewController(okAlertController, true, null);
       });

Best Regards,

Wenyan Zhang

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