java.lang.NullPointerException Attempt to invoke virtual method 'void io.flutter.embedding.android.FlutterView.attachToFlutterEngine(io.flutter.embedding.engine.FlutterEngine)' on a null object reference

bugly 收集的日志

使用版本v3.0-preview.13

Attempt to invoke virtual method 'void io.flutter.embedding.android.FlutterView.attachToFlutterEngine(io.flutter.embedding.engine.FlutterEngine)' on a null object reference
com.idlefish.flutterboost.containers.FlutterBoostFragment.performAttach(FlutterBoostFragment.java:295)收起
出错堆栈

1 com.idlefish.flutterboost.containers.FlutterBoostFragment.performAttach(FlutterBoostFragment.java:295)
2 com.idlefish.flutterboost.containers.FlutterBoostFragment.didFragmentShow(FlutterBoostFragment.java:273)
3 com.idlefish.flutterboost.containers.FlutterBoostFragment.onHiddenChanged(FlutterBoostFragment.java:98)
4 androidx.fragment.app.FragmentManagerImpl.completeShowHideFragment(FragmentManagerImpl.java:1210)
5 androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManagerImpl.java:1275)
6 androidx.fragment.app.BackStackRecord.executeOps(BackStackRecord.java:434)
7 androidx.fragment.app.FragmentManagerImpl.executeOps(FragmentManagerImpl.java:2079)
8 androidx.fragment.app.FragmentManagerImpl.executeOpsTogether(FragmentManagerImpl.java:1869)
9 androidx.fragment.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManagerImpl.java:1824)
10 androidx.fragment.app.FragmentManagerImpl.execPendingActions(FragmentManagerImpl.java:1727)
11 androidx.fragment.app.FragmentManagerImpl$2.run(FragmentManagerImpl.java:150)
12 android.os.Handler.handleCallback(Handler.java:900)
13 android.os.Handler.dispatchMessage(Handler.java:103)
14 android.os.Looper.loop(Looper.java:219)
15 android.app.ActivityThread.main(ActivityThread.java:8668)
16 java.lang.reflect.Method.invoke(Native Method)
17 com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
18 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1109)

Start in FlutterBoostFragment.java at performAttach line 295, then trace the didFragmentShow and onHiddenChanged calls shown in the stack trace. Reproduce the reported v3.0-preview.13 scenario and determine why FlutterView is null; done means the reported attach path no longer raises this NullPointerException.

Written by the indexing model from the issue text.