flutter - 在flutter插件中获取事件引用

Question

当我创建一个flutter插件时，默认情况下，插件类中有两种方法:

override fun onAttachedToEngine(flutterPluginBinding: FlutterPlugin.FlutterPluginBinding)

和

fun registerWith(registrar: Registrar)

文件上的注释说: It is encouraged to share logic between onAttachedToEngine and registerWith to keep them functionally equivalent. Only one of onAttachedToEngine or registerWith will be called depending on the user's project. onAttachedToEngine or registerWith must both be defined in the same class.
现在，我需要使用 activity.startActivityForResult()从此处开始另一个事件。
可以使用 registerWith(registrar: Registrar)在 registrar.activity()中获得对事件的引用。如何在 onAttachedToEngine(flutterPluginBinding: FlutterPlugin.FlutterPluginBinding)方法中执行此操作？

Answer 1

找到了解决方案here。
实现ActivityAware及其方法之一是

 override fun onAttachedToActivity(binding: ActivityPluginBinding) {
    this.activity = binding.activity;
  }