获取异常"IllegalStateException: onSaveInstanceState后不能执行此操作"

我有一个Live Android应用程序，从市场上我收到了以下堆栈跟踪，我不知道为什么它会发生，因为它不是发生在应用程序代码中，而是由应用程序的一些或其他事件引起的(假设)

我没有使用片段，仍然有一个FragmentManager的参考。如果有人能揭示一些隐藏的事实，以避免这类问题:

java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
at android.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1109)
at android.app.FragmentManagerImpl.popBackStackImmediate(FragmentManager.java:399)
at android.app.Activity.onBackPressed(Activity.java:2066)
at android.app.Activity.onKeyDown(Activity.java:1962)
at android.view.KeyEvent.dispatch(KeyEvent.java:2482)
at android.app.Activity.dispatchKeyEvent(Activity.java:2274)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1668)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)
at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1112)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1720)
at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1258)
at android.app.Activity.dispatchKeyEvent(Activity.java:2269)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1668)
at android.view.ViewRoot.deliverKeyEventPostIme(ViewRoot.java:2851)
at android.view.ViewRoot.handleFinishedEvent(ViewRoot.java:2824)
at android.view.ViewRoot.handleMessage(ViewRoot.java:2011)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:132)
at android.app.ActivityThread.main(ActivityThread.java:4025)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
at dalvik.system.NativeStart.main(Native Method)

当前回答

我认为在这些操作之前调用FragmentActivity.onStateNotSaved()可能是目前最好的选择。

2017-05-24 19:22:55

其他回答

我得到这个异常时，我按下后退按钮取消意图选择器在我的地图片段活动。我通过替换onResume()的代码来解决这个问题(我在那里初始化片段和提交事务)到onStart()，应用程序现在工作正常。希望能有所帮助。

2014-07-14 11:44:15

读 http://chris-alexander.co.uk/on-engineering/dev/android-fragments-within-fragments/

篇文章。 fragment. isresume()检查帮助我在onDestroyView w/o使用onSaveInstanceState方法。

2013-04-18 09:24:02

My use case: I have used listener in fragment to notify activity that some thing happened. I did new fragment commit on callback method. This works perfectly fine on first time. But on orientation change the activity is recreated with saved instance state. In that case fragment is not created again implies that the fragment have the listener which is old destroyed activity. Any way the call back method will get triggered on action. It goes to destroyed activity which cause the issue. The solution is to reset the listener in fragment with current live activity. This solve the problem.

2016-09-02 12:18:12

当一个Fragment或AppCompatActivity的状态通过onSaveInstanceState()保存时，它的UI被认为是不可变的，直到ON_START被调用。在保存状态后尝试修改UI可能会导致应用程序导航状态的不一致，这就是为什么FragmentManager会抛出异常，如果应用程序在保存状态后运行FragmentTransaction。参见commit()了解详细信息。

LiveData通过避免在观察者的关联生命周期至少不是STARTED时调用它的观察者来避免这种边缘情况。在幕后，它在决定调用其观察者之前调用isAtLeast()。

2022-07-25 04:09:14

经过研究，这个问题的解决方案是做你的片段提交在onresume。

来源:https://wenchaojames.wordpress.com/2013/01/12/illegalstateexception-from-onactivityresult/

2015-03-06 10:14:32

获取异常"IllegalStateException: onSaveInstanceState后不能执行此操作"

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