ChromeSafariBrowser requestPostMessageChannel is unimplemented.

[LawrenceStent]

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Current Behavior

The plugin throws an Unimplemented Exception when trying to use the ChromeSafariBrowser (required for using ChromeCustomTabs and needing secure webview), and calling browser.requestPostMessageChannel("www.xyz.com", "www.xyz.com").

The error:
E/flutter (26341): [ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: MissingPluginException(No implementation found for method requestPostMessageChannel on channel com.pichillilorenzo/flutter_chromesafaribrowser_1711081391042471983824345991992081426910332) E/flutter (26341): #0 MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:332:7) E/flutter (26341): <asynchronous suspension> E/flutter (26341): #1 AndroidChromeSafariBrowser.requestPostMessageChannel (package:flutter_inappwebview_android/src/chrome_safari_browser/chrome_safari_browser.dart:335:12) E/flutter (26341): <asynchronous suspension> E/flutter (26341): #2 _ChromeSafariBrowserExampleScreenState.build.<anonymous closure> (package:post_message_test/src/sample_feature/chrome_webview:105:33) E/flutter (26341): <asynchronous suspension> E/flutter (26341):

Due to this we can't utilise web to app communication.

Expected Behavior

Expected behaviour is that requestPostMessageChannel and postMessage are implemented so that ChromeSafariBrowser.

I have a simple example app in this repo, that opens a browser and then calls widget.browser.requestPostMessageChannel(). Found here: https://github.com/TFG-Labs/flutter_post_message_test

I then cloned the library and tried implementing the method myself but ran into issues. I implement it in ChromeSafariBrowser:flutter_inappwebview_android/lib/src/chrome_safari_browser/chrome_safari_browser.dart. Found here: https://github.com/TFG-Labs/flutter_inappwebview_new_fork

*apologies for lack of commits on both repos.

I then also implement it in the ChromeSafariBrowserManager: flutter_inappwebview_android/chrome_custom_tabs/ChromeSafariBrowserManager.java

In ChromeCustomTabsChannelDelegate: flutter_inappwebview_android/chrome_custom_tabs/ChromeCustomTabsChannelDelegate.java

And in ChromeCustomTabsActivity: flutter_inappwebview_android/chrome_custom_tabs/ChromeCustomTabsActivity.java

But regardless nothing I've tried causes the unimplemented error to go away. I can't find another method channel that might need implementing, nor does implementing the method channel directly in the ChromeCustomTabsActivity work.

Steps with code example to reproduce

Steps with code example to reproduce

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Stacktrace/Logs

Stacktrace/Logs

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Flutter version

3.22.0

Operating System, Device-specific and/or Tool

Android 34

Plugin version

6.1.5

Additional information

No response

Self grab

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