onWaveInstanceState之后的TabWidget onClick（java.lang.IllegalStateException：在onSaveInstanceState之后无法执行此操作）

Question

I've created a fragment tab widget following fragment compatibility package sample, I change fragment in onTabChanged but I have some market reports that spots IllegalStateException after onSaveInstanceState , this is caused by asking a commit to fragment manager after calling onSaveInstanceState() , but how can I receive a performClick after onSaveInstanceState is called?

the stack trace:

java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1314)
at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1325)
at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:548)
at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:532)
at my.app.NewsTab.onTabChanged(NewsTab.java:144)
at android.widget.TabHost.invokeOnTabChangeListener(TabHost.java:378)
at android.widget.TabHost.setCurrentTab(TabHost.java:363)
at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:149)
at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:559)
at android.view.View.performClick(View.java:3122)
at android.view.View$PerformClick.run(View.java:12012)
at android.os.Handler.handleCallback(Handler.java:587)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:132)
at android.app.ActivityThread.main(ActivityThread.java:4126)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
at dalvik.system.NativeStart.main(Native Method)

looks like this was somehow discussed (by searching the error), but for me it's only a side effect, a bug in support? I've also read about a different application lifecycle for honeycomb+, but perform click after saving instance looks unrealable behavior to me

should I use commitAllowingStateLoss() or mTabHost.setOnClickListener(null) in onSaveInstanceState ?

unfortunately I'm unable to reproduce, I only see rare reports on developer console

the activity has android:configChanges="orientation|screenLayout"

I've tested the lifecycle also with "always finish"

the tab fragment switcher is inside a ViewPager but I doubt can be related

Answer 1

它似乎是Android从版本4.4到版本5的错误。有关更多详细信息，请参阅此答案 。

Answer 2

The problem is that you are attempting to commit a FragmentTransaction after the Activity 's onSaveInstanceState() method has been called. This is not allowed for the reasons described in this blog post .

Answer 3

onSaveInstanceState() is called after the Activity is gone from the foreground. You can't do anything after saving the state. Please, if you can, share us your code to check it. You have to make the changes before calling onSaveInstanceState() method.