解決IllegalStateException: Can not perform this action after onSaveInstanceState

yangxi_001發表於2016-09-05
ExceptionORM

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

E/AndroidRuntime(12747): Caused by: 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)

是在使用FragmentTransition的 commit方法新增一個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.

大致意思是說我使用的 commit方法是在Activity的onSaveInstanceState()之後呼叫的，這樣會出錯，因為onSaveInstanceState

方法是在該Activity即將被銷燬前呼叫，來儲存Activity資料的，如果在儲存玩狀態後再給它新增Fragment就會出錯。解決辦法就

是把commit（）方法替換成 commitAllowingStateLoss()就行了，其效果是一樣的。


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