Android 颤振平台视图：尝试创建未注册类型的平台视图

所以，我从60devs开始学习，学习如何使用PlatformView在Flatter中实现本机Webview。我完全按照文章进行操作，但我发现了以下错误：

Unhandled Exception: PlatformException(error, Trying to create a platform view of unregistered type: webview, null)

• 我的最小SDK版本大于20（目前为21）
• 我在我的

  AndroidManifest.xml

  文件中拥有互联网权限
• 我已尝试过

  flutter clean

但什么都不管用

颤振运行错误：

E/flutter ( 8794): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: PlatformException(error, Trying to create a platform view of unregistered type: webview, null)
E/flutter ( 8794): #0      StandardMethodCodec.decodeEnvelope 
package:flutter/…/services/message_codecs.dart:564
E/flutter ( 8794): #1      MethodChannel.invokeMethod 
package:flutter/…/services/platform_channel.dart:316
E/flutter ( 8794): <asynchronous suspension>
E/flutter ( 8794): #2      AndroidViewController._create 
package:flutter/…/services/platform_views.dart:639
E/flutter ( 8794): <asynchronous suspension>
E/flutter ( 8794): #3      AndroidViewController.setSize 
package:flutter/…/services/platform_views.dart:556
E/flutter ( 8794): <asynchronous suspension>
E/flutter ( 8794): #4      RenderAndroidView._sizePlatformView 
package:flutter/…/rendering/platform_view.dart:189
E/flutter ( 8794): <asynchronous suspension>
E/flutter ( 8794): #5      RenderAndroidView.performResize 
package:flutter/…/rendering/platform_view.dart:170
E/flutter ( 8794): #6      RenderObject.layout 
package:flutter/…/rendering/object.dart:1604
E/flutter ( 8794): #7      _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
package:flutter/…/rendering/proxy_box.dart:105
E/flutter ( 8794): #8      RenderObject.layout 
package:flutter/…/rendering/object.dart:1619
E/flutter ( 8794): #9      _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
package:flutter/…/rendering/proxy_box.dart:105
E/flutter ( 8794): #10     RenderObject.layout 
package:flutter/…/rendering/object.dart:1619
E/flutter ( 8794): #11     _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
package:flutter/…/rendering/proxy_box.dart:105
E/flutter ( 8794): #12     RenderObject.layout 
package:flutter/…/rendering/object.dart:1619
E/flutter ( 8794): #13     _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
package:flutter/…/rendering/proxy_box.dart:105
E/flutter ( 8794): #14     RenderObject.layout 
package:flutter/…/rendering/object.dart:1619
E/flutter ( 8794): #15     _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
package:flutter/…/rendering/proxy_box.dart:105
E/flutter ( 8794): #16     RenderObject.layout 
package:flutter/…/rendering/object.dart:1619
E/flutter ( 8794): #17     _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
package:flutter/…/rendering/proxy_box.dart:105
E/flutter ( 8794): #18     RenderObject.layout 
package:flutter/…/rendering/object.dart:1619
E/flutter ( 8794): #19     _RenderProxyBox&RenderBox&RenderObjectWithChildMixin&RenderProxyBoxMixin.performLayout 
package:flutter/…/rendering/proxy_box.dart:105
E/flutter ( 8794): #20     RenderObject.layout 
package:flutter/…/rendering/object.dart:1619
E/flutter ( 8794): #21     RenderOffstage.performLayout 
package:flutter/…/rendering/proxy_box.dart:3074

E/flatter（8794）：[错误：flatter/lib/ui/ui\u dart\u state.cc（148）]未处理的异常：PlatformException（错误，尝试创建未注册类型的平台视图：webview，null）
E/颤振（8794）：#0标准方法编解码器
软件包：flatter/../services/message\u编解码器。dart:564
E/颤振（8794）：#1方法Channel.invokeMethod
包装：颤振/../services/平台\通道。dart:316
E/颤振（8794）：，它简短而简单。告诉我哪里出了问题？
请打印颤振医生-v的信息，可能1.5.4hotfix无法与平台视图一起使用。
即使我已经实现了该教程。但是，它没有得到正确的实现和测试。我认为作者从一篇媒体文章中复制了这篇文章，并在不理解其概念的情况下复制粘贴了它。我试过很多次平台视图。但是，我一点运气都没有。如果你有一天理解了这个概念，请在这里发表评论解释。谢谢