解決IllegalStateException: Can not perform this

今天使用Fragment的時候，出現了這個錯誤 IllegalStateException: Can not perform this action after onSaveInstanceState：

1. E/AndroidRuntime(12747): Caused by: java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState  

2.     at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1314)  

3.     at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1325)  

是在使用FragmentTransition的 commit方法添加一個Fragment的時候出現的，後來在官網找到了相關的

說明：http://developer.android.com/reference/android/app/FragmentTransaction.html#commitAllowingStateLoss()

public abstract int commitAllowingStateLoss ()                                    Added in API level 11

Like commit() but allows the commit to be executed after an activity's state is saved. This is dangerous 

because the commit can be lost if the activity needs to later be restored from its state, so this should 

only be used for cases where it is okay for the UI state to change unexpectedly on the user.

大體意思是說我使用的 commit方法是在Activity的onSaveInstanceState()以後調用的，這樣會出錯，由於onSaveInstanceState

方法是在該Activity即將被銷燬前調用，來保存Activity數據的，若是在保存玩狀態後再給它添加Fragment就會出錯。解決辦法就

是把commit（）方法替換成 commitAllowingStateLoss()就行了，其效果是同樣的。