NullPointerException

Current use version？

当前使用的版本是多少？

v3.11.1

Will this problem occur in demo?

Demo能否复现这问题？

Describe the problem or provide an error log？

描述问题或提供错误log？

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'int com.luck.picture.lib.widget.RecyclerPreloadView.getLastVisiblePosition()' on a null object reference
       at com.luck.picture.lib.PictureSelectorFragment.onSaveInstanceState(PictureSelectorFragment.java:223)
       at androidx.fragment.app.Fragment.performSaveInstanceState(Fragment.java:3151)
       at androidx.fragment.app.FragmentStateManager.saveBasicState(FragmentStateManager.java:683)
       at androidx.fragment.app.FragmentStateManager.saveState(FragmentStateManager.java:649)
       at androidx.fragment.app.FragmentStore.saveActiveFragments(FragmentStore.java:177)
       at androidx.fragment.app.FragmentManager.saveAllState(FragmentManager.java:2655)
       at androidx.fragment.app.FragmentController.saveAllState(FragmentController.java:152)
       at androidx.fragment.app.FragmentActivity$1.saveState(FragmentActivity.java:133)
       at androidx.savedstate.SavedStateRegistry.performSave(SavedStateRegistry.java:247)
       at androidx.savedstate.SavedStateRegistryController.performSave(SavedStateRegistryController.kt:81)
       at androidx.activity.ComponentActivity.onSaveInstanceState(ComponentActivity.java:383)
       at android.app.Activity.performSaveInstanceState(Activity.java:2088)
       at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1485)
       at android.app.ActivityThread.callActivityOnSaveInstanceState(ActivityThread.java:5436)
       at android.app.ActivityThread.callActivityOnStop(ActivityThread.java:4749)
       at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:4713)
       at android.app.ActivityThread.handleStopActivity(ActivityThread.java:4788)
       at android.app.servertransaction.StopActivityItem.execute(StopActivityItem.java:41)
       at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:176)
       at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2073)
       at android.os.Handler.dispatchMessage(Handler.java:107)
       at android.os.Looper.loop(Looper.java:225)
       at android.app.ActivityThread.main(ActivityThread.java:7563)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:994)

Start in PictureSelectorFragment.java at line 223 and trace the RecyclerPreloadView lifecycle during onSaveInstanceState. Reproduce the reported NullPointerException around activity or fragment stopping, then verify that state saving completes without dereferencing a null view.