Detect incoming VOIP calls in Android

Question

Detect incoming VOIP calls in Android

Young Calabria 61

Hi,

I need to detect incoming VOIP calls in order to allow/block some numbers.
I found CallScreeningService API for Android witch sounds good!
But I'm not sure and it is not clear whether it works only on gsm calls or it also supports voip too, for example like detecting whatsapp calls.

Any idea? Thanks!

Anonymous

You can try to use AudioManager to detect incoming VOIP calls. Check the MODE_IN_COMMUNICATION, it could detect the incoming VOIP call. here is code snap.

AudioManager am = Application.Context.GetSystemService(Context.AudioService) as AudioManager;
             var mode = am.Mode;
            if (Mode.InCall == mode)
            {
                // device is in a telephony call
            }
            else if (Mode.InCommunication == mode)
            {
                // device is in communiation mode, i.e. in a VoIP or video call
            }
            else if (Mode.Ringtone == mode)
            {
                // device is in ringing mode, some incoming is being signalled
            }
            else
            {
                // device is in normal mode, no incoming and no audio being played
            }

Young Calabria 61 Reputation points

2021-08-03T20:58:03.05+00:00

Thank you @Anonymous .
But the problem is I want to detect incoming call event when app is running in the background.
I'm looking mainly to detect whatsapp calls in background and block them under specific criteria based on user preferences.
Is that achievable?
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2021-08-04T09:56:43.96+00:00

You can have a try in BackgroundService.
Young Calabria 61 Reputation points

2021-08-04T23:06:22.487+00:00

@Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) thank you.
But using BackgroundService, how can I catch incoming call event?
If you mean to keep listening in the background, then this will drain user battery and will definitely get my app to be banned.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2021-08-05T08:43:23.157+00:00

I' m afraid you could have a try to use Foreground Service and judge voip in the onCreate() method. However, as you said, it will drain user battery.

Your answer

Anonymous

2021-08-03T08:58:23.563+00:00

You can try to use AudioManager to detect incoming VOIP calls. Check the MODE_IN_COMMUNICATION, it could detect the incoming VOIP call. here is code snap.

AudioManager am = Application.Context.GetSystemService(Context.AudioService) as AudioManager; var mode = am.Mode; if (Mode.InCall == mode) { // device is in a telephony call } else if (Mode.InCommunication == mode) { // device is in communiation mode, i.e. in a VoIP or video call } else if (Mode.Ringtone == mode) { // device is in ringing mode, some incoming is being signalled } else { // device is in normal mode, no incoming and no audio being played }
Young Calabria 61 Reputation points

2021-08-03T20:58:03.05+00:00

Thank you @Anonymous .
But the problem is I want to detect incoming call event when app is running in the background.
I'm looking mainly to detect whatsapp calls in background and block them under specific criteria based on user preferences.
Is that achievable?
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2021-08-04T09:56:43.96+00:00

You can have a try in BackgroundService.
Young Calabria 61 Reputation points

2021-08-04T23:06:22.487+00:00

@Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) thank you.
But using BackgroundService, how can I catch incoming call event?
If you mean to keep listening in the background, then this will drain user battery and will definitely get my app to be banned.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,436 Reputation points Microsoft External Staff

2021-08-05T08:43:23.157+00:00

I' m afraid you could have a try to use Foreground Service and judge voip in the onCreate() method. However, as you said, it will drain user battery.

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Detect incoming VOIP calls in Android

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