Call Persistence #1486

Vinayak006 · 2023-11-20T09:17:01Z

Vinayak006
Nov 20, 2023

How to make a call persist even when the app is in the background?

Below is the sample code i have used in my project:

class VoipApp with WidgetsBindingObserver implements WebRTCDelegate {
  bool background = false;
  late final VoIP voIP;
  BuildContext context;
  bool _canHandleNewCall = true;

  VoipApp(this.context) {
    voIP = VoIP(locator<Client>(), this);
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState? state) {
    background = (state == AppLifecycleState.detached ||
        state == AppLifecycleState.paused);
  }

  @override
  bool get canHandleNewCall => _canHandleNewCall;

  @override
  Future<webrtc_impl.RTCPeerConnection> createPeerConnection(
      Map<String, dynamic> configuration,
      [Map<String, dynamic> constraints = const {}]) {
    return webrtc_impl.createPeerConnection(configuration, constraints);
  }

  @override
  webrtc_impl.VideoRenderer createRenderer() {
    return webrtc_impl.RTCVideoRenderer();
  }

  @override
  Future<void> handleCallEnded(CallSession session) async {
    _canHandleNewCall = true;
  }

  @override
  Future<void> handleGroupCallEnded(GroupCall groupCall) async {
    throw UnimplementedError();
  }

  @override
  Future<void> handleMissedCall(CallSession session) async {
    Logs().i("MISSED CALL");
  }

  @override
  Future<void> handleNewCall(CallSession session) async {
    _canHandleNewCall = false;
    switch (session.direction) {
      case CallDirection.kIncoming:
        Logs().i("[VOIP] INCOMING CALL");
        Navigator.of(context).push(
          MaterialPageRoute(
            builder: (context) => CallScreen(
              callSession: session,
            ),
          ),
        );
        break;
      case CallDirection.kOutgoing:
        Logs().i("[VOIP] OUTGOING CALL");
        Navigator.of(context).push(
          MaterialPageRoute(
            builder: (context) => CallScreen(
              callSession: session,
            ),
          ),
        );
        break;
    }
  }

  @override
  Future<void> handleNewGroupCall(GroupCall groupCall) {
    throw UnimplementedError();
  }

  @override
  bool get isWeb => kIsWeb;

  @override
  webrtc_interface.MediaDevices get mediaDevices =>
      webrtc_impl.navigator.mediaDevices;

  @override
  Future<void> playRingtone() async {
  }

  @override
  Future<void> stopRingtone() async {
  }
}

After navigating to the "Call Screen", when the user exits the app (ie. the app goes background), the audio gets stopped.

D/FlutterWebRTCPlugin(24632): Stopping the audio manager...

How can I make the call persist in all life cycle states?

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Call Persistence #1486

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Call Persistence #1486

Vinayak006 Nov 20, 2023

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Vinayak006
Nov 20, 2023