Install flutter_inappwebview: ^2.1.0+1 Android project crashes

[zboboan]

Environment

Android

Flutter version:
Flutter:1.12.13+hotfix.5

Android version:
Android 9.0

Description

After installing flutter_inappwebview: ^2.1.0+1, the project crashed when running. After debugging on the simulator, an error was reported as "Could not update files on device: HttpException: Connection closed before full header was received". After several versions were changed, no error was reported But it still collapses

[heshaShawky]

Same issue here too

[wwwdata]

I also have this problem on a fresh flutter project with version: Flutter 1.12.13+hotfix.5

Here is the stacktrace that was logged in adb shell:

01-16 13:02:40.772 17111 17111 E AndroidRuntime: FATAL EXCEPTION: main
01-16 13:02:40.772 17111 17111 E AndroidRuntime: Process: com.example.webview_newtest, PID: 17111
01-16 13:02:40.772 17111 17111 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.webview_newtest/com.example.webview_newtest.MainActivity}: java.lang.NullPointerException: Attempt to invoke interface method 'io.flutter.plugin.common.BinaryMessenger io.flutter.plugin.common.PluginRegistry$Registrar.messenger()' on a null object reference
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3270)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.os.Handler.dispatchMessage(Handler.java:107)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.os.Looper.loop(Looper.java:214)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.app.ActivityThread.main(ActivityThread.java:7356)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at java.lang.reflect.Method.invoke(Native Method)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
01-16 13:02:40.772 17111 17111 E AndroidRuntime: Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'io.flutter.plugin.common.BinaryMessenger io.flutter.plugin.common.PluginRegistry$Registrar.messenger()' on a null object reference
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at com.pichillilorenzo.flutter_inappwebview.InAppBrowser.<init>(InAppBrowser.java:66)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at com.pichillilorenzo.flutter_inappwebview.InAppWebViewFlutterPlugin.onAttachedToEngine(InAppWebViewFlutterPlugin.java:40)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at io.flutter.embedding.engine.FlutterEnginePluginRegistry.add(FlutterEnginePluginRegistry.java:125)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:15)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at com.example.webview_newtest.MainActivity.configureFlutterEngine(MainActivity.kt:10)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at io.flutter.embedding.android.FlutterActivityAndFragmentDelegate.onAttach(FlutterActivityAndFragmentDelegate.java:185)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at io.flutter.embedding.android.FlutterActivity.onCreate(FlutterActivity.java:418)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.app.Activity.performCreate(Activity.java:7802)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.app.Activity.performCreate(Activity.java:7791)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1299)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
01-16 13:02:40.772 17111 17111 E AndroidRuntime:        ... 11 more

[wwwdata]

as already mentioned in other issues. The plugin system of flutter changed and if you are on the latest version, install from the master branch. Fixes will only be available when version 3.0 is officially released. I am running on the master branch now and everything works fine!

[polilluminato]

@wwwdata so you're telling me we have to clone the repo and not download the plugin like usual from pub.dev and insert flutter_inappwebview in the dependencies section?

[wwwdata]

Yes. You can import from a git repo. It is described here https://flutter.dev/docs/development/packages-and-plugins/using-packages#dependencies-on-unpublished-packages

[polilluminato]

Yes. You can import from a git repo. It is described here https://flutter.dev/docs/development/packages-and-plugins/using-packages#dependencies-on-unpublished-packages

Yeah! If I add in the pubspec.yaml this:

flutter_inappwebview:
    git:
      url: git@github.com:pichillilorenzo/flutter_inappwebview.git

instead of:

flutter_inappwebview: ^2.1.0+1

the app runs well!

Thank you so much @wwwdata

[zboboan]

是。您可以从git仓库导入。它在这里描述https://flutter.dev/docs/development/packages-and-plugins/using-packages#dependencies-on-unpublished-packages

Thank you so much

[2x2xplz]

Thanks very much @wwwdata and @polilluminato

However I am getting

git@github.com: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

I'm able to clone the repo from the command line, although I am asked for my passphrase. I can also download a ZIP or clone from github. But the seamless install as @polilluminato describes is not successful.
I'm on Windows.

[polilluminato]

Thanks very much @wwwdata and @polilluminato
...
I'm able to clone the repo from the command line, although I am asked for my passphrase. I can also download a ZIP or clone from github. But the seamless install as @polilluminato describes is not successful.
I'm on Windows.

Try with

url: https://github.com/pichillilorenzo/flutter_inappwebview.git

instead of

url: git@github.com:pichillilorenzo/flutter_inappwebview.git

I read on other repos that some Windows users fix the issue in this way, I'm on Linux so I cannot try but maybe It works for you.

[2x2xplz]

Thanks again @polilluminato , that did work. Should have thought of it myself as https:// is how we download ZIP or clone the repo anyway. For future viewers, the full entry in pubspec.yaml is

  flutter_inappwebview:
    git:
      url: https://github.com/pichillilorenzo/flutter_inappwebview.git

It is also possible to clone or download a ZIP (then unzip) and use the local copy:

  flutter_inappwebview:
    path: C:/path/to/this/repo/flutter_inappwebview

(note that backslashes, or double-backslashes, don't work)

One final comment: if simply adding this package normally will automatically crash the app (which is why we're all here), a link to this issue should be highlighted on the front-page README.

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