android - 解码 : android. support.v4.view.ViewPager$SavedState 时出现 ClassNotFoundException

Question

我在 Android 崩溃报告中看到以下错误:

android.os.BadParcelableException: ClassNotFoundException when unmarshalling: android.support.v4.view.ViewPager$SavedState
at android.os.Parcel.readParcelable(Parcel.java:1971)
at android.os.Parcel.readValue(Parcel.java:1859)
at android.os.Parcel.readSparseArrayInternal(Parcel.java:2128)
at android.os.Parcel.readSparseArray(Parcel.java:1581)
at android.os.Parcel.readValue(Parcel.java:1916)
at android.os.Parcel.readMapInternal(Parcel.java:2099)
at android.os.Bundle.unparcel(Bundle.java:223)
at android.os.Bundle.getSparseParcelableArray(Bundle.java:1225)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:806)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1083)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:635)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1431)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:431)
at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:160)
at android.support.v4.view.ViewPager.populate(ViewPager.java:895)
at android.support.v4.view.ViewPager.populate(ViewPager.java:772)
at android.support.v4.view.ViewPager.completeScroll(ViewPager.java:1539)
at android.support.v4.view.ViewPager.computeScroll(ViewPager.java:1422)
at android.view.ViewGroup.drawChild(ViewGroup.java:3028)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2788)
at android.view.ViewGroup.drawChild(ViewGroup.java:3184)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2788)
at android.view.ViewGroup.drawChild(ViewGroup.java:3184)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2788)
at android.view.ViewGroup.drawChild(ViewGroup.java:3184)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2788)
at android.view.View.draw(View.java:11017)
at android.widget.FrameLayout.draw(FrameLayout.java:450)
at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2175)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2234)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1810)
at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2695)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:4977)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)

恢复 Activity 时似乎会间歇性发生。我没有在任何代码中直接访问 SavedState 类。

Answer 1

我遇到了同样的错误，这就是我所做的。

我的问题来自于将 ViewPager 与 FragmentStatePagerAdapter 一起使用。 ViewPager 中的一个 fragment 内部有另一个 ViewPager。拥有第二个 View 寻呼机导致了这个罕见的错误。即使有或没有适配器。

解决方案是简单地设置 setSaveEnabled(false);在第二个 ViewPager 上。