Casting from android.webkit

[ronaldG19]

D/WebView (27574): WebView
D/SettingsInterface(27574): from settings cache , name = show_password , value = 0
W/cr_AwContents(27574): onDetachedFromWindow called when already detached. Ignoring
E/MethodChannel#flutter_webview_plugin(27574): Failed to handle method call
E/MethodChannel#flutter_webview_plugin(27574): java.lang.ClassCastException: android.webkit.WebView cannot be cast to com.flutter_webview_plugin.ObservableWebView
E/MethodChannel#flutter_webview_plugin(27574): at com.flutter_webview_plugin.WebviewManager.(WebviewManager.java:102)
E/MethodChannel#flutter_webview_plugin(27574): at com.flutter_webview_plugin.FlutterWebviewPlugin.openUrl(FlutterWebviewPlugin.java:93)
E/MethodChannel#flutter_webview_plugin(27574): at com.flutter_webview_plugin.FlutterWebviewPlugin.onMethodCall(FlutterWebviewPlugin.java:42)
E/MethodChannel#flutter_webview_plugin(27574): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:191)
E/MethodChannel#flutter_webview_plugin(27574): at io.flutter.view.FlutterNativeView.handlePlatformMessage(FlutterNativeView.java:152)
E/MethodChannel#flutter_webview_plugin(27574): at android.os.MessageQueue.nativePollOnce(Native Method)
E/MethodChannel#flutter_webview_plugin(27574): at android.os.MessageQueue.next(MessageQueue.java:328)
E/MethodChannel#flutter_webview_plugin(27574): at android.os.Looper.loop(Looper.java:164)
E/MethodChannel#flutter_webview_plugin(27574): at android.app.ActivityThread.main(ActivityThread.java:5763)
E/MethodChannel#flutter_webview_plugin(27574): at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#flutter_webview_plugin(27574): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
E/MethodChannel#flutter_webview_plugin(27574): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:679)
E/flutter (27574): [ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception:
E/flutter (27574): PlatformException(error, android.webkit.WebView cannot be cast to com.flutter_webview_plugin.ObservableWebView, null)
E/flutter (27574): #0 StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:547:7)
E/flutter (27574): #1 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:279:18)
E/flutter (27574):
E/flutter (27574): #2 FlutterWebviewPlugin.launch (package:flutter_webview_plugin/src/base.dart:137:20)
E/flutter (27574):
E/flutter (27574): #3 _WebviewScaffoldState.build (package:flutter_webview_plugin/src/webview_scaffold.dart:71:24)
E/flutter (27574): #4 StatefulElement.build (package:flutter/src/widgets/framework.dart:3730:27)
E/flutter (27574): #5 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3642:15)
E/flutter (27574): #6 Element.rebuild (package:flutter/src/widgets/framework.dart:3495:5)
E/flutter (27574): #7 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3622:5)
E/flutter (27574): #8 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3769:11)
E/flutter (27574): #9 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3617:5)
E/flutter (27574): #10 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2907:14)
E/flutter (27574): #11 Element.updateChild (package:flutter/src/widgets/framework.dart:2710:12)
E/flutter (27574): #12 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4654:14)
E/flutter (27574): #13 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2907:14)
E/flutter (27574): #14 Element.updateChild (package:flutter/src/widgets/framework.dart:2710:12)
E/flutter (27574): #15 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3653:16)
E/flutter (27574): #16 Element.rebuild (package:flutter/src/widgets/framework.dart:3495:5)
E/flutter (27574): #17 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3622:5)
E/flutter (27574): #18 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3617:5)
E/flutter (27574): #19 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2907:14)
E/flutter (27574): #20 Element.updateChild (package:flutter/src/widgets/framework.dart:2710:12)
E/flutter (27574): #21 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4654:14)
E/flutter (27574): #22 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2907:14)
E/flutter (27574): #23 Element.updateChild (package:flutter/src/widgets/framework.dart:2710:12)
E/flutter (27574): #24 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4654:14)
E/flutter (27574): #25 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2907:14)
E/flutter (27574): #26 Element.updateChild (package:flutter/src/widgets/framework.dart:2710:12)
E/flutter (27574): #27 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4654:14)
E/flutter (27574): #28 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2907:14)
E/flutter (27574): #29 Element.updateChild (package:flutter/src/widgets/framework.dart:2710:12)
E/flutter (27574): #30 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:4654:14)
E/flutter (27574): #31 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2907:14)
E/flutter (27574): #32 Element.updateChild (package:flutter/src/widgets/framework.dart:2710:12)
E/flutter (27574): #33 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3653:16)
E/flutter (27574): #34 Element.rebuild (package:flutter/src/widgets/framework.dart:3495:5)
E/flutter (27574): #35 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3622:5)
E/flutter (27574): #36 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:3769:11)
E/flutter (27574): #37 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3617:5)
E/flutter (27574): #38 Element.inflateWidget (package:flutter/src/widgets/framework.dart:2907:14)
E/flutter (27574): #39 Element.updateChild (package:flutter/src/widgets/framework.dart:2710:12)
E/flutter (27574): #40 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:3653:16)
E/flutter (27574): #41 Element.rebuild (package:flutter/src/widgets/framework.dart:3495:5)
E/flutter (27574): #42 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:3622:5)
E/flutter (27574): #43 ComponentElement.mount (package:flutter/src/widgets/framework.dart:3617:5)
E/flutter (27574): #44 Elem

My flutter Doctor

Running flutter doctor...
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel beta, v0.5.1, on Linux, locale en_US.UTF-8)
[!] Android toolchain - develop for Android devices (Android SDK 27.0.3)
! Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses
[✓] Android Studio (version 3.1)
[✓] IntelliJ IDEA Community Edition (version 2018.1)
[✓] Connected devices (1 available)

! Doctor found issues in 1 category.

[dannysood]

Facing the same issue. Did you downgrade to older version?

[arthurbezerra]

Facing this issue when trying to run the example provided out of the box

android.webkit.WebView cannot be cast to com.flutter_webview_plugin.ObservableWebView

[Cyganieszka]

Facing the same issue when trying to run on android emulator.

flutter_webview_plugin: ^0.2.1+1

[✓] Flutter (Channel beta, v0.5.1, on Mac OS X 10.13.6 17G65, locale pl-PL)
[✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
[✓] iOS toolchain - develop for iOS devices (Xcode 9.4.1)
[✗] Android Studio (not installed)
[✓] IntelliJ IDEA Ultimate Edition (version 2018.2)
[✓] Connected devices (2 available)

! Doctor found issues in 1 category.

[ronaldG19]

@dannysood I downgraded the plugin but still the problem persist..

[Cyganieszka]

In my case, it works after downgrading to 2.0.

flutter_webview_plugin: 0.2.0

[lejard-h]

should be fix in 0.2.1+2, let me know if not

[ronaldG19]

Worked already