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是什么导致 Flutter 2.10 应用程序的 dispatchWindowVisibilityChanged 出现 NullPointerException？

[英]What is causing a NullPointerException in dispatchWindowVisibilityChanged for Flutter 2.10 app?

原文 2022-02-08 19:34:44 7 1 android/ flutter

Since updating my app to the latest stable version of Flutter (2.10) targeting API 31, I am seeing in Crashlytics lots of exceptions similar to this:自从将我的应用程序更新到 Flutter (2.10) 的最新稳定版本（针对 API 31）后，我在 Crashlytics 中看到了很多与此类似的异常：

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.dispatchWindowVisibilityChanged(int)' on a null object reference at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1619) at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1619) at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1619) at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1619) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2646) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:2143) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8665) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1037) at android.view.Choreographer.doCallbacks(Choreogra Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.dispatchWindowVisibilityChanged(int)' on a null object reference at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1619) at android. view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1619) at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1619) at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1619) at android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:2646) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:2143) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8665) at android.view.Choreographer$CallbackRecord.run( Choreographer.java:1037) 在 android.view.Choreographer.doCallbacks(Choreogr pher.java:845) at android.view.Choreographer.doFrame(Choreographer.java:780) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1022) at android.os.Handler.handleCallback(Handler.java:938) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loopOnce(Looper.java:201) at android.os.Looper.loop(Looper.java:288) at android.app.ActivityThread.main(ActivityThread.java:7839) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003) pher.java:845) at android.view.Choreographer.doFrame(Choreographer.java:780) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1022) at android.os.Handler.handleCallback(Handler.java :938) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loopOnce(Looper.java:201) at android.os.Looper.loop(Looper.java:288) at android .app.ActivityThread.main(ActivityThread.java:7839) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) at com.android. internal.os.ZygoteInit.main(ZygoteInit.java:1003)

The crash occurs mostly in the background.崩溃主要发生在后台。 I saw some other posts about the Google ad control, but I am not serving ads.我看到了一些关于 Google 广告控制的其他帖子，但我没有投放广告。 I do display a Google map control using hybrid composition, but I have no idea if that is even related.我确实使用混合组合显示了一个 Google map 控件，但我不知道这是否相关。 I need some ideas on what is causing this and how to track it down.我需要一些关于造成这种情况的原因以及如何追踪它的想法。