video call acceptance screen with Agora flutter

Question

I'm trying to build a video calling app with Agora , I need to show acceptance screen like WhatsApp when user calling, if the app is exited i need to show calling screen when user is calling, I tried lot of thing but nothing works, I trying to do i flutter and but there is nothing much information on this,Please help me

Answer 1

First things first. You need to learn about some concepts before delving into your solution. Actually there isn't an out of the box solution.

You need to use a couple of things together:

• Use push notifications to "wake up" your app:
  https://pub.dev/packages/firebase_messaging
  To start your app using push notifications refers to this post:
  https://stackoverflow.com/a/48405551/4335775
  
  
• Use CallKit (IOS) or ConnectionServices (Android) to show the upcoming call screen. By the day of this answer there are only a few packages to handle these things, here is one that can handle both platforms:
  https://pub.dev/packages/flutter_callkeep

If you want a completely different thing and need to run some background process, there are bunch whole of things you should know first.
I suggest beginning here: https://flutter.dev/docs/development/packages-and-plugins/background-processes

Here is a usefull package to work with background processes that should be constantly running:
https://pub.dev/packages/background_fetch

Currently there are two packages which provides integration for agora.io:

• https://pub.dev/packages/agora_rtc_engine (for Agora Real Time Communication, vídeo call included)
• https://pub.dev/packages/agora_rtm for real-time messaging

I hope this can help you.

Answer 2

You can try WorkManager plugin.

You can register an call back function to the os when the app is closed.

const myTask = "syncWithTheBackEnd";

void main() {
  Workmanager.initialize(callbackDispatcher);
  Workmanager.registerOneOffTask(
    "1",
    myTask, //This is the value that will be returned in the callbackDispatcher
    initialDelay: Duration(minutes: 5),
    constraints: WorkManagerConstraintConfig(
      requiresCharging: true,
      networkType: NetworkType.connected,
    ),
  );
  runApp(MyApp());
}

void callbackDispatcher() {
  Workmanager.executeTask((task) {
    switch (task) {
      case myTask:
        print("this method was called from native!");
        break;
      case Workmanager.iOSBackgroundTask:
        print("iOS background fetch delegate ran");
        break;
    }

    //Return true when the task executed successfully or not
    return Future.value(true);
  });
}

Maybe this can help you.

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