Getting error after authorization- Failed to handle method call

[mprabhu33]

Trying to authorization using Microsoft office 365 account,
Error:
E/MethodChannel#oauth2_custom_uri_scheme( 481): Failed to handle method call
E/MethodChannel#oauth2_custom_uri_scheme( 481): java.lang.UnsupportedOperationException: The new embedding does not support the old FlutterView.
E/MethodChannel#oauth2_custom_uri_scheme( 481): at io.flutter.embedding.engine.plugins.shim.ShimRegistrar.view(ShimRegistrar.java:82)
E/MethodChannel#oauth2_custom_uri_scheme( 481): at jp.espresso3389.oauth2_custom_uri_scheme.Oauth2CustomUriSchemePlugin.onMethodCall(Oauth2CustomUriSchemePlugin.kt:53)
E/MethodChannel#oauth2_custom_uri_scheme( 481): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:231)
E/MethodChannel#oauth2_custom_uri_scheme( 481): at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:93)
E/MethodChannel#oauth2_custom_uri_scheme( 481): at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:642)
E/MethodChannel#oauth2_custom_uri_scheme( 481): at android.os.MessageQueue.nativePollOnce(Native Method)
E/MethodChannel#oauth2_custom_uri_scheme( 481): at android.os.MessageQueue.next(MessageQueue.java:325)
E/MethodChannel#oauth2_custom_uri_scheme( 481): at android.os.Looper.loop(Looper.java:142)
E/MethodChannel#oauth2_custom_uri_scheme( 481): at android.app.ActivityThread.main(ActivityThread.java:6626)
E/MethodChannel#oauth2_custom_uri_scheme( 481): at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#oauth2_custom_uri_scheme( 481): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
E/MethodChannel#oauth2_custom_uri_scheme( 481): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:811)
I/flutter ( 481): PlatformException(error, The new embedding does not support the old FlutterView., null)

Configuration:
final oauth2Config = OAuth2Config(
uniqueId: 'example.com#1',
authorizationEndpoint: Uri.parse("https://login.microsoftonline.com/common/oauth2/v2.0/authorize"),
tokenEndpoint: Uri.parse("https://login.microsoftonline.com/common/oauth2/v2.0/token"),

// NOTE: For Android, we also have corresponding intent-filter entry on example/android/app/src/main/AndroidManifest.xml
redirectUri: Uri.parse('com.example.redirect43763246328://callback'),
scope: "user.read",
clientId: "xxxxxxxx",
clientSecret: "xxxxxx"

);

Android Manifest.xml:

Microsoft Office 365 Redirect URI configuration:

Not able to get token after authorization.

Please let me know, how to resolve the issue and get token.

[espresso3389]

Could you please try the git version by replacing the dependency to pub.dev's oauth2_custom_uri_scheme with the following one:

  oauth2_custom_uri_scheme:
    git:
      https://github.com/espresso3389/oauth2_custom_uri_scheme

If it works for you, I'll publish a new package as soon as possible.

[espresso3389]

Sorry, the previous commit does not fix the issue and 7d4d869 (0.3.8) finally fixes the issue.

[mprabhu33]

Thanks @espresso3389
But app getting crashed when include the oauth2_custom_uri_scheme in pubspec.yaml.
oauth2_custom_uri_scheme: ^0.3.9

Tried all versions 0.3.6, 0.3.8 and 0.3.9
Also direct from git
oauth2_custom_uri_scheme:
git:
https://github.com/espresso3389/oauth2_custom_uri_scheme

Application getting crashed, if exclude/comment oauth2_custom_uri_scheme application is working fine.

Attached sample project,
test_oauth.zip

Could you please check the issue?

[espresso3389]

Woops,

We're hitting the issue just now...
pichillilorenzo/flutter_inappwebview#220

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.oauth_test, PID: 15697
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.oauth_test/com.example.oauth_test.MainActivity}: java.lang.NullPointerException: Attempt to invoke interface method 'io.flutter.plugin.common.BinaryMessenger io.flutter.plugin.common.PluginRegistry$Registrar.messenger()' on a null object reference
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3430)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3614)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:86)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2199)
        at android.os.Handler.dispatchMessage(Handler.java:112)
        at android.os.Looper.loop(Looper.java:216)
        at android.app.ActivityThread.main(ActivityThread.java:7625)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987)
     Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'io.flutter.plugin.common.BinaryMessenger io.flutter.plugin.common.PluginRegistry$Registrar.messenger()' on a null object reference
        at com.pichillilorenzo.flutter_inappwebview.InAppBrowser.<init>(InAppBrowser.java:66)
        at com.pichillilorenzo.flutter_inappwebview.InAppWebViewFlutterPlugin.onAttachedToEngine(InAppWebViewFlutterPlugin.java:40)
        at io.flutter.embedding.engine.FlutterEnginePluginRegistry.add(FlutterEnginePluginRegistry.java:130)
        at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:17)
        at com.example.oauth_test.MainActivity.configureFlutterEngine(MainActivity.kt:10)
        at io.flutter.embedding.android.FlutterActivityAndFragmentDelegate.onAttach(FlutterActivityAndFragmentDelegate.java:186)
        at io.flutter.embedding.android.FlutterActivity.onCreate(FlutterActivity.java:421)
        at android.app.Activity.performCreate(Activity.java:7458)
        at android.app.Activity.performCreate(Activity.java:7448)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1286)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3409)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3614) 
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:86) 
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2199) 
        at android.os.Handler.dispatchMessage(Handler.java:112) 
        at android.os.Looper.loop(Looper.java:216) 
        at android.app.ActivityThread.main(ActivityThread.java:7625) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:987) 

[espresso3389]

There's a release blocker and I just released a release, 0.3.10 which is based on 0.3.6 (the code is not changed) so it's anyway not fixing any things but it just work on certain environments.

So if you want to check the latest version, please use the latest github commit. I think the following commit will work:

  oauth2_custom_uri_scheme:
    git:
      url: https://github.com/espresso3389/oauth2_custom_uri_scheme
      ref: a94d9e76001fb09c4761eda47fd47ecdca9f08e4

[espresso3389]

0.4.3 introduces flutter_inappwebview 4.0.0 and the issue is fixed.