是什么导致 android.support.v4.app.Fragment.setUserVisibleHint() 崩溃？
What is causing crash in android.support.v4.app.Fragment.setUserVisibleHint()?
最近我在我的应用程序的 crashlytics 中看到了几次以下崩溃：
Fragment.java line 960
android.support.v4.app.Fragment.setUserVisibleHint
Fatal Exception: android.os.BadParcelableException: ClassNotFoundException when unmarshalling: android.support.v7.widget.RecyclerView$SavedState
at android.os.Parcel.readParcelableCreator + 2855(Parcel.java:2855)
at android.os.Parcel.readParcelable + 2781(Parcel.java:2781)
at android.os.Parcel.readValue + 2684(Parcel.java:2684)
at android.os.Parcel.readSparseArrayInternal + 3134(Parcel.java:3134)
at android.os.Parcel.readSparseArray + 2367(Parcel.java:2367)
at android.os.Parcel.readValue + 2741(Parcel.java:2741)
at android.os.Parcel.readArrayMapInternal + 3053(Parcel.java:3053)
at android.os.BaseBundle.initializeFromParcelLocked + 288(BaseBundle.java:288)
at android.os.BaseBundle.unparcel + 232(BaseBundle.java:232)
at android.os.BaseBundle.putBoolean + 569(BaseBundle.java:569)
at android.support.v4.app.Fragment.setUserVisibleHint + 960(Fragment.java:960)
at android.support.v4.app.FragmentStatePagerAdapter.instantiateItem + 121(FragmentStatePagerAdapter.java:121)
at android.support.v4.view.ViewPager.addNewItem + 1004(ViewPager.java:1004)
at android.support.v4.view.ViewPager.populate + 1186(ViewPager.java:1186)
at android.support.v4.view.ViewPager.populate + 1086(ViewPager.java:1086)
at android.support.v4.view.ViewPager.run + 267(ViewPager.java:267)
at android.view.Choreographer$CallbackRecord.run + 986(Choreographer.java:986)
at android.view.Choreographer.doCallbacks + 764(Choreographer.java:764)
at android.view.Choreographer.doFrame + 696(Choreographer.java:696)
at android.view.Choreographer$FrameDisplayEventReceiver.run + 965(Choreographer.java:965)
at android.os.Handler.handleCallback + 873(Handler.java:873)
at android.os.Handler.dispatchMessage + 99(Handler.java:99)
at android.os.Looper.loop + 214(Looper.java:214)
at android.app.ActivityThread.main + 7073(ActivityThread.java:7073)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run + 494(RuntimeInit.java:494)
at com.android.internal.os.ZygoteInit.main + 965(ZygoteInit.java:965)
我无法重现崩溃。
有人知道是什么原因造成的吗？
显然，崩溃是由支持兼容库之一 'com.android.support:appcompat-v7:28.0.0' 或 'com.android.support:support-compat:28.0.0'
中的错误引起的
迁移到 AndroidX 反而解决了问题。
With Android Studio 3.2 and higher, you can migrate an existing
project to AndroidX by selecting Refactor > Migrate to AndroidX from
the menu bar.
相关信息：
AndroidX replaces the original support library APIs with packages in
the androidx namespace. Only the package and Maven artifact names
changed; class, method, and field names did not change.
AndroidX is a redesigned library to make package names more clear. So
from now on android hierarchy will be for only android default
classes, which comes with android operating system and other
library/dependencies will be part of androidx (makes more sense). So
from now on all the new development will be updated in androidx.
Google 不再支持原始支持库：
Version 28.0.0 is the last release of the Support Library.
最近我在我的应用程序的 crashlytics 中看到了几次以下崩溃：
Fragment.java line 960 android.support.v4.app.Fragment.setUserVisibleHint
Fatal Exception: android.os.BadParcelableException: ClassNotFoundException when unmarshalling: android.support.v7.widget.RecyclerView$SavedState
at android.os.Parcel.readParcelableCreator + 2855(Parcel.java:2855)
at android.os.Parcel.readParcelable + 2781(Parcel.java:2781)
at android.os.Parcel.readValue + 2684(Parcel.java:2684)
at android.os.Parcel.readSparseArrayInternal + 3134(Parcel.java:3134)
at android.os.Parcel.readSparseArray + 2367(Parcel.java:2367)
at android.os.Parcel.readValue + 2741(Parcel.java:2741)
at android.os.Parcel.readArrayMapInternal + 3053(Parcel.java:3053)
at android.os.BaseBundle.initializeFromParcelLocked + 288(BaseBundle.java:288)
at android.os.BaseBundle.unparcel + 232(BaseBundle.java:232)
at android.os.BaseBundle.putBoolean + 569(BaseBundle.java:569)
at android.support.v4.app.Fragment.setUserVisibleHint + 960(Fragment.java:960)
at android.support.v4.app.FragmentStatePagerAdapter.instantiateItem + 121(FragmentStatePagerAdapter.java:121)
at android.support.v4.view.ViewPager.addNewItem + 1004(ViewPager.java:1004)
at android.support.v4.view.ViewPager.populate + 1186(ViewPager.java:1186)
at android.support.v4.view.ViewPager.populate + 1086(ViewPager.java:1086)
at android.support.v4.view.ViewPager.run + 267(ViewPager.java:267)
at android.view.Choreographer$CallbackRecord.run + 986(Choreographer.java:986)
at android.view.Choreographer.doCallbacks + 764(Choreographer.java:764)
at android.view.Choreographer.doFrame + 696(Choreographer.java:696)
at android.view.Choreographer$FrameDisplayEventReceiver.run + 965(Choreographer.java:965)
at android.os.Handler.handleCallback + 873(Handler.java:873)
at android.os.Handler.dispatchMessage + 99(Handler.java:99)
at android.os.Looper.loop + 214(Looper.java:214)
at android.app.ActivityThread.main + 7073(ActivityThread.java:7073)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run + 494(RuntimeInit.java:494)
at com.android.internal.os.ZygoteInit.main + 965(ZygoteInit.java:965)
我无法重现崩溃。
有人知道是什么原因造成的吗？
显然，崩溃是由支持兼容库之一 'com.android.support:appcompat-v7:28.0.0' 或 'com.android.support:support-compat:28.0.0'
迁移到 AndroidX 反而解决了问题。
With Android Studio 3.2 and higher, you can migrate an existing project to AndroidX by selecting Refactor > Migrate to AndroidX from the menu bar.
相关信息：
AndroidX replaces the original support library APIs with packages in the androidx namespace. Only the package and Maven artifact names changed; class, method, and field names did not change.
AndroidX is a redesigned library to make package names more clear. So from now on android hierarchy will be for only android default classes, which comes with android operating system and other library/dependencies will be part of androidx (makes more sense). So from now on all the new development will be updated in androidx.
Google 不再支持原始支持库：
Version 28.0.0 is the last release of the Support Library.