ElectronicAssistant/plugin/custom_notification/lib/custom_notification_method_channel.dart

import 'dart:async';

import 'package:flutter/foundation.dart';
import 'package:flutter/services.dart';

import 'custom_notification_platform_interface.dart';

/// An implementation of [CustomNotificationPlatform] that uses method channels.
class MethodChannelCustomNotification extends CustomNotificationPlatform {
  /// The method channel used to interact with the native platform.
  @visibleForTesting
  final methodChannel = const MethodChannel('custom_notification');

  MethodChannelCustomNotification() {
    methodChannel.setMethodCallHandler(_handleMethod);
  }

  final StreamController<String> _recordActionStreamController =
      StreamController<String>.broadcast();

  Future<dynamic> _handleMethod(MethodCall call) async {
    debugPrint(
        'MethodChannelCustomNotification  _handleMethod  ${call.method}');
    switch (call.method) {
      case "recordAction":
        _recordAction(call.arguments);
        break;
    }
  }

  void _recordAction(dynamic action) {
    if (action is String) {
      _recordActionStreamController.add(action);
    }
  }

  @override
  Stream<String> recordActionStream() {
    return _recordActionStreamController.stream;
  }

  @override
  Future<void> showRecordNotification(
      int notificationId, bool isRecording, String timeDesc,
      {required String channelId, required String channelName}) async {
    return await methodChannel.invokeMethod("showRecordNotification", {
      "notificationId": notificationId,
      "isRecording": isRecording,
      "timeDesc": timeDesc,
      "channelId": channelId,
      "channelName": channelName,
    });
  }
}