Phone-Call-Detection-Kotlin

Phone Call Detection

This application provides a sample demonstrating phone calls detection. Upon deploying this sample application, you should be able to have two-way audio and video communication using OpenTok. Audio and video streams published from device to OpenTok session will be halted for the duration of ongoing phone call.

Main features:

• Create 2-way OpenTok video call
• Detect incoming and outgoing native phone calls
• Disable device video/video while being onCallStateChanged the phone call

Configure the app

Open the OpenTokConfig file and configure the API_KEY, SESSION_ID, and TOKEN variables. You can obtain these values from your TokBox account.

Listen fo call state changes

This is the code responsible for listening for the call status:

TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
//Phone state permissions are required from Api 31. Add check of permission to avoid crash.
telephonyManager.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);

//...

private PhoneStateListener phoneStateListener = new PhoneStateListener() {
    @Override
    public void onCallStateChanged(int state, String incomingNumber) {

        super.onCallStateChanged(state, incomingNumber);

        switch (state) {
            case TelephonyManager.CALL_STATE_IDLE: //Initial state
                Log.d("onCallStateChanged", "CALL_STATE_IDLE");
                break;

            case TelephonyManager.CALL_STATE_RINGING: // Incoming call Ringing
                Log.d("onCallStateChanged", "CALL_STATE_RINGING");
                break;

            case TelephonyManager.CALL_STATE_OFFHOOK: // Outgoing Call | Accepted incoming call
                Log.d("onCallStateChanged", "CALL_STATE_OFFHOOK");
                break;

            default:
                Log.d("onCallStateChanged", "Unknown Phone State !");
                break;
        }
    }
};

Further Reading

• Review other sample projects
• Read more about OpenTok Android SDK