fluttercommunity / fluttercommunity/flutter_webview_plugin

MissingPluginException

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Description

System info

Issue occurs on: iOS / Android / both
Plugin version: xxx
Flutter doctor output:

Unhandled Exception: MissingPluginException(No implementation found for method launch on channel flutter_webview_plugin)
#0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:154:7)
<asynchronous suspension>
#1      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:329:12)
#2      FlutterWebviewPlugin.launch (package:flutter_webview_plugin/src/base.dart:225:20)
#3      _WebviewScaffoldState.build.<anonymous closure> (package:flutter_webview_plugin/src/webview_scaffold.dart:156:30)
#4      _WebviewPlaceholderRender.notifyRect (package:flutter_webview_plugin/src/webview_scaffold.dart:246:16)
#5      _WebviewPlaceholderRender.paint (package:flutter_webview_plugin/src/webview_scaffold.dart:256:7)
#6      RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#7      PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#8      RenderBoxContainerDefaultsMixin.defaultPaint (package:flutter/src/rendering/box.dart:2515:15)
#9      RenderCustomMultiChildLayoutBox.paint (package:flutter/src/rendering/custom_layout.dart:404:5)
#10     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#11     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#12     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#13     _RenderInkFeatures.paint (package:flutter/src/material/material.dart:531:11)
#14     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#15     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#16     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#17     PaintingContext.pushLayer (package:flutter/src/rendering/object.dart:391:12)
#18     RenderPhysicalModel.paint (package:flutter/src/rendering/proxy_box.dart:1800:15)
#19     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#20     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#21     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#22     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#23     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#24     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#25     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#26     PaintingContext._repaintCompositedChild (package:flutter/src/rendering/object.dart:135:11)
#27     PaintingContext.repaintCompositedChild (package:flutter/src/rendering/object.dart:95:5)
#28     PaintingContext._compositeChild (package:flutter/src/rendering/object.dart:201:7)
#29     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:182:7)
#30     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#31     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#32     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#33     RenderBoxContainerDefaultsMixin.defaultPaint (package:flutter/src/rendering/box.dart:2515:15)
#34     RenderStack.paintStack (package:flutter/src/rendering/stack.dart:602:5)
#35     RenderStack.paint (package:flutter/src/rendering/stack.dart:610:7)
#36     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#37     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#38     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#39     RenderDecoratedBox.paint (package:flutter/src/rendering/proxy_box.dart:2040:11)
#40     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#41     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#42     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#43     RenderFractionalTranslation.paint (package:flutter/src/rendering/proxy_box.dart:2514:13)
#44     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#45     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#46     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#47     RenderFractionalTranslation.paint (package:flutter/src/rendering/proxy_box.dart:2514:13)
#48     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#49     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#50     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#51     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#52     PaintingContext._repaintCompositedChild (package:flutter/src/rendering/object.dart:135:11)
#53     PaintingContext.repaintCompositedChild (package:flutter/src/rendering/object.dart:95:5)
#54     PaintingContext._compositeChild (package:flutter/src/rendering/object.dart:201:7)
#55     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:182:7)
#56     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#57     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#58     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#59     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#60     RenderOffstage.paint (package:flutter/src/rendering/proxy_box.dart:3238:11)
#61     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#62     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#63     _RenderTheatre.paintStack (package:flutter/src/widgets/overlay.dart:737:15)
#64     _RenderTheatre.paint (package:flutter/src/widgets/overlay.dart:747:7)
#65     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#66     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#67     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#68     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#69     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#70     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#71     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#72     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#73     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#74     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#75     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#76     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#77     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#78     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#79     RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:129:15)
#80     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#81     PaintingContext.paintChild (package:flutter/src/rendering/object.dart:184:13)
#82     RenderView.paint (package:flutter/src/rendering/view.dart:213:15)
#83     RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:2264:7)
#84     PaintingContext._repaintCompositedChild (package:flutter/src/rendering/object.dart:135:11)
#85     PaintingContext.repaintCompositedChild (package:flutter/src/rendering/object.dart:95:5)
#86     PipelineOwner.flushPaint (package:flutter/src/rendering/object.dart:980:29)
#87     RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:404:19)
#88     WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:884:13)
#89     RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:284:5)
#90     SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1113:15)
#91     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1052:9)
#92     SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:968:5)
#93     _rootRun (dart:async/zone.dart:1184:13)
#94     _CustomZone.run (dart:async/zone.dart:1077:19)
#95     _CustomZone.runGuarded (dart:async/zone.dart:979:7)
#96     _invoke (dart:ui/hooks.dart:261:10)
#97     _drawFrame (dart:ui/hooks.dart:219:3)

Steps to Reproduce

  1. ...
  2. ...
  3. ...

Logs

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

The report supplies only a MissingPluginException stack trace, pointing to FlutterWebviewPlugin.launch in src/base.dart:225 and WebviewScaffold in src/webview_scaffold.dart:156. First obtain the missing system information, reproduction steps, logs, and flutter doctor output, then reproduce the launch failure. Done means the cause is identified and the reported launch path works without the exception.

Written by the indexing model from the issue text.

Assessment

Tech stack
dart, flutter, java
Domain
mobile
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
15/100

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