onForegroundAlarmEventHandler method

Implementation

@override
void onForegroundAlarmEventHandler(OnForegroundAlarmEvent alarmEvent) {
  methodChannel.setMethodCallHandler((call) {
    if (call.method ==
        describeEnum(ChannelMethods.ON_BACKGROUND_ACTIVITY_LAUNCH)) {
      alarmEvent(AlarmItem.fromJsonList(jsonDecode(call.arguments)));
    }
    return Future.value();
  });
}