现有Android项目中FlutterFragment集成InAppWebView失败求助

我正尝试将Flutter库InAppWebView集成到基于传统XML布局的现有Android应用中。使用FlutterActivity时一切正常，但改用FlutterFragment后，InAppWebView出现错误——我的目标是让WebView仅占据屏幕一部分，所以必须用Fragment实现。怀疑是对Fragment生命周期的理解有误，希望有人指出问题所在。

问题复现步骤 #

• 已创建Android应用和Flutter模块
• 将Flutter组件加载到FlutterActivity中时运行正常
• 加载到FlutterFragment中时，执行以下代码后触发错误：

  await InAppWebViewController.setWebContentsDebuggingEnabled(true);
  

  这段代码是Flutter模块main.dart的Future main()中最先执行的操作之一（main.dart使用了InAppWebView文档中的示例代码），错误日志如下：

  E/OpenGLRenderer: Unable to match the desired swap behavior.
  E/flutter: [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: MissingPluginException(No implementation found for method setWebContentsDebuggingEnabled on channel com.pichillilorenzo/flutter_inappwebview_manager)
      #0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:308:7)
      <asynchronous suspension>
      #1      InAppWebViewController.setWebContentsDebuggingEnabled (package:flutter_inappwebview/src/in_app_webview/in_app_webview_controller.dart:3817:12)
      <asynchronous suspension>
      #2      main (package:flutter_web_view/main.dart:11:5)
      <asynchronous suspension>
  

• 如果移除上述引发错误的代码，会出现另一个错误：

  E/flutter: [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(error, java.lang.IllegalStateException: Trying to create a platform view of unregistered type: com.pichillilorenzo/flutter_inappwebview
          at io.flutter.plugin.platform.PlatformViewsController$1.createPlatformView(PlatformViewsController.java:489)
          at io.flutter.plugin.platform.PlatformViewsController$1.createForPlatformViewLayer(PlatformViewsController.java:163)
          at io.flutter.embedding.engine.systemchannels.PlatformViewsChannel$1.create(PlatformViewsChannel.java:105)
          at io.flutter.embedding.engine.systemchannels.PlatformViewsChannel$1.onMethodCall(PlatformViewsChannel.java:55)
          at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:258)
          at io.flutter.embedding.engine.dart.DartMessenger.invokeHandler(DartMessenger.java:295)
          at io.flutter.embedding.engine.dart.DartMessenger.lambda$dispatchMessageToQueue$0$io-flutter-embedding-engine-dart-DartMessenger(DartMessenger.java:322)
          at io.flutter.embedding.engine.dart.DartMessenger$$ExternalSyntheticLambda0.run(Unknown Source:12)
          at android.os.Handler.handleCallback(Handler.java:958)
          at android.os.Handler.dispatchMessage(Handler.java:99)
          at android.os.Looper.loopOnce(Looper.java:205)
          at android.os.Looper.loop(Looper.java:294)
          at android.app.ActivityThread.main(ActivityThread.java:8176)
          at java.lang.reflect.Method.invoke(Native Method)
          at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:971)
      , null, null)
      #0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:652:7)
      #1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:310:18)
      <asynchronous suspension>
      #2      ExpensiveAndroidViewController._sendCreateMessage (package:flutter/src/services/platform_views.dart:1040:5)
      <asynchronous suspension>
      #3      AndroidViewController.create (package:flutter/src/services/platform_views.dart:763:5)
      <asynchronous suspension>
  

• 无论哪种情况，WebView都无法加载
• 已在该Flutter库的GitHub页面提交issue

内容的提问来源于stack exchange，提问作者JacobToftgaardRasmussen