addEventHandler method
      
void
addEventHandler({ 
    
- EventHandler? onReceiveNotification,
- EventHandler? onOpenNotification,
- EventHandler? onReceiveMessage,
- EventHandler? onReceiveNotificationAuthorization,
- EventHandler? onNotifyMessageUnShow,
- EventHandler? onConnected,
- EventHandler? onInAppMessageClick,
- EventHandler? onInAppMessageShow,
- EventHandler? onNotifyButtonClick,
- EventHandler? onCommandResult,
- EventHandler? onReceiveDeviceToken,
初始化 JPush 必须先初始化才能执行其他操作(比如接收事件传递)
Implementation
void addEventHandler({
  EventHandler? onReceiveNotification,
  EventHandler? onOpenNotification,
  EventHandler? onReceiveMessage,
  EventHandler? onReceiveNotificationAuthorization,
  EventHandler? onNotifyMessageUnShow,
  EventHandler? onConnected,
  EventHandler? onInAppMessageClick,
  EventHandler? onInAppMessageShow,
  EventHandler? onNotifyButtonClick,
  EventHandler? onCommandResult,
  EventHandler? onReceiveDeviceToken,
}) {
  print(flutter_log + "addEventHandler:has not been implemented.");
}