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我有一个 DialogFragment 我尝试在我的 Activity 的覆盖 onPostResume() 方法中创建，但我收到此错误消息：java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState

我已经阅读了类似问题的所有答案（此处、此处、此处和此处的博客），但没有一个对我有用（onPostResume 修复或 Runnable 修复），或者不适合 - 我不想使用 commitAllowingStateLoss 因为它不安全，而且我不想在不调用 super() 的情况下覆盖 onSaveInstanceState。

编辑：我已将问题缩小到我对 Eventbus 的使用。当我直接在 onPostResume 方法中创建对话框片段时，我没有收到任何错误。当我调用 eventbus 事件来创建对话框片段时，我得到了上述错误。我尝试将事件处理程序的线程更改为：

public void onEvent(DisplayOperatorDialogEvent event)
public void onEventMainThread(DisplayOperatorDialogEvent event)

但这似乎没有什么不同。

编码：

@Override
protected void onPostResume()
{
    super.onPostResume();
    Log.d("MainActivity","in onPostResume");
    Intent receivedIntent = getIntent();
    String receivedAction = receivedIntent.getAction();//null if started from the menu
    try
    {
        String receivedText;
        if(receivedAction!=null && receivedAction.equals("display_dialog"))
        {
            receivedText = receivedIntent.getStringExtra("dialog");
            if(receivedText!=null && receivedText.equals("operator"))
            {
                String title = "hello";
                String msg = "test";
                DisplayOperatorDialogEvent dialogEvent = new DisplayOperatorDialogEvent(title, msg);
                EventBus.getDefault().post(dialogEvent);
            }
        }
        receivedIntent.setAction("");
        receivedIntent.removeExtra("screen");
    }
    catch(Exception e)
    {
        Log.e("Error: parse the notification screen intent: ", "" + e);
    } 
}

public void onEvent(DisplayOperatorDialogEvent event)
{
    {
        android.support.v4.app.FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        android.support.v4.app.Fragment prev = getSupportFragmentManager().findFragmentByTag("operator");
        if (prev != null)
        {
            ft.remove(prev);
        }
        ft.addToBackStack(null);

        operatorDialog = new OperatorDialogFragment();
        Bundle args = new Bundle();
        args.putString("title", event.getTitle());
        args.putString("message", event.getMsg());
        operatorDialog.show(ft,"operator");
    }
}

追溯：

10-05 19:06:43.115  20803-20803/com.unifiapp E/Event﹕ Could not dispatch event: class com.unifiapp.events.Events$DisplayOperatorDialogEvent to subscribing class class com.unifiapp.MainActivity
java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
        at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1360)
        at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1378)
        at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:595)
        at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:574)
        at android.support.v4.app.DialogFragment.show(DialogFragment.java:155)
        at com.unifiapp.MainActivity.onEvent(MainActivity.java:478)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at de.greenrobot.event.EventBus.invokeSubscriber(EventBus.java:569)
        at de.greenrobot.event.EventBus.postToSubscription(EventBus.java:500)
        at de.greenrobot.event.EventBus.postSingleEvent(EventBus.java:475)
        at de.greenrobot.event.EventBus.post(EventBus.java:365)
        at com.unifiapp.MainActivity.onPostResume(MainActivity.java:676)
        at android.app.Activity.performResume(Activity.java:5323)
        at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2764)
        at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2803)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2238)
        at android.app.ActivityThread.access$800(ActivityThread.java:135)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:136)
        at android.app.ActivityThread.main(ActivityThread.java:5001)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
        at dalvik.system.NativeStart.main(Native Method)

Android 4.0 和 4.4 都会出现此问题。

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