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suihan74 / Satena

非公式はてなブックマークAndroidアプリ
https://play.google.com/store/apps/details?id=com.suihan74.satena
MIT License
7 stars 0 forks source link

`BookmarksActivity#onBackPressed`呼び出し時に`ViewPager2`のコンテンツ復元処理でクラッシュする場合がある #300

Closed suihan74 closed 3 years ago

suihan74 commented 3 years ago 
Fatal Exception: java.lang.IllegalStateException: Fragment no longer exists for key f#0: unique id fd3c8d3c-f6d0-4a41-a14a-1055f7b8d4bc
       at androidx.fragment.app.FragmentManager.getFragment(FragmentManager.java:960)
       at androidx.viewpager2.adapter.FragmentStateAdapter.restoreState(FragmentStateAdapter.java:549)
       at androidx.viewpager2.widget.ViewPager2.restorePendingState(ViewPager2.java:350)
       at androidx.viewpager2.widget.ViewPager2.dispatchRestoreInstanceState(ViewPager2.java:375)
       at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:3892)
       at android.view.View.restoreHierarchyState(View.java:19983)
       at androidx.fragment.app.Fragment.restoreViewState(Fragment.java:639)
       at androidx.fragment.app.Fragment.restoreViewState(Fragment.java:3010)
       at androidx.fragment.app.Fragment.performActivityCreated(Fragment.java:3001)
       at androidx.fragment.app.FragmentStateManager.activityCreated(FragmentStateManager.java:580)
       at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:285)
       at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2180)
       at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2100)
       at androidx.fragment.app.FragmentManager.popBackStackImmediate(FragmentManager.java:781)
       at androidx.fragment.app.FragmentManager.popBackStackImmediate(FragmentManager.java:692)
       at androidx.fragment.app.FragmentManager.handleOnBackPressed(FragmentManager.java:664)
       at androidx.fragment.app.FragmentManager$1.handleOnBackPressed(FragmentManager.java:436)
       at androidx.activity.OnBackPressedDispatcher.onBackPressed(OnBackPressedDispatcher.java:192)
       at androidx.activity.ComponentActivity.onBackPressed(ComponentActivity.java:529)
       at com.suihan74.satena.scenes.bookmarks.BookmarksActivity.onBackPressed(BookmarksActivity.java:140)
       at android.app.Activity.onKeyUp(Activity.java:3709)
       at android.view.KeyEvent.dispatch(KeyEvent.java:2847)
       at android.app.Activity.dispatchKeyEvent(Activity.java:4026)
       at androidx.core.app.ComponentActivity.superDispatchKeyEvent(ComponentActivity.java:122)
       at androidx.core.view.KeyEventDispatcher.dispatchKeyEvent(KeyEventDispatcher.java:84)
       at androidx.core.app.ComponentActivity.dispatchKeyEvent(ComponentActivity.java:140)
       at androidx.appcompat.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:569)
       at androidx.appcompat.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:59)
       at androidx.appcompat.app.AppCompatDelegateImpl$AppCompatWindowCallback.dispatchKeyEvent(AppCompatDelegateImpl.java:3054)
       at com.android.internal.policy.DecorView.dispatchKeyEvent(DecorView.java:388)
       at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:5558)
       at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5426)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4931)
       at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4984)
       at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4950)
       at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5090)
       at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4958)
       at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5147)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4931)
       at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4984)
       at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4950)
       at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4958)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4931)
       at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4984)
       at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4950)
       at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5123)
       at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:5286)
       at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:3069)
       at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:2612)
       at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:2603)
       at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:3046)
       at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:143)
       at android.os.MessageQueue.nativePollOnce(MessageQueue.java)
       at android.os.MessageQueue.next(MessageQueue.java:336)
       at android.os.Looper.loop(Looper.java:181)
       at android.app.ActivityThread.main(ActivityThread.java:7560)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)
suihan74 commented 3 years ago

ViewPager2を使用する他の箇所でも発生する可能性があると思われるが果たして。

同様の問題と思われるものの解決法
java.lang.IllegalStateException: Fragment no longer exists for key f0: unique id

suihan74 commented 3 years ago

当然ではあるが、コンテンツのRecyclerViewのスクロール位置などもリセットされてしまうのでこの対応しない方がいいのではという感じはしている。