如何在Flutter Android插件包中处理Android生命周期 [英] How to handle android lifecycle in flutter android plugin package

问题描述

我需要知道android插件包中flutter应用程序视图的当前状态.

I need to know the current state of the flutter app view in an android plugin package.

现在，我使用 https://docs.flutter.io/flutter/widgets/WidgetsBindingObserver-class.html 并将其传递给我的插件.

For now, I observe the state in the flutter view with https://docs.flutter.io/flutter/widgets/WidgetsBindingObserver-class.html and pass it then to my plugin.

由于有时看起来并不完美(第一个事件未在Android上传递)，我想直接从android插件获取状态.

As this seems sometimes not perfect (the first event is not passed on Android) I would like to get the state directly from the android plugin.

在插件中，我可以获得注册商，并且可以注册其活动，但是如何观察其状态?

In the plugin I get the registrar and can its activity, but how do I observe the state of it?

推荐答案

Flutter不提供这些生命周期事件的挂钩.

Flutter doesn't provide hooks for these lifecycle events.

Android Jetpack(以前称为Architecture Components)添加了一种从活动接收生命周期事件的好方法:

Android Jetpack (formerly Architecture Components) added a nice way to receive lifecycle events from an activity:

使用具有生命周期意识的组件处理生命周期

缺点:仅当活动是AppCompatActivity时，它才起作用. Flutter应用程序通常基于简单的Activity，因此您必须告诉用户使用AppCompatActivity.

Downside: It only works when the activity is an AppCompatActivity. Flutter apps are usually based on a simple Activity, so you have to tell your users to use an AppCompatActivity instead.

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