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Android开发问题汇总 #34

Open microacup opened 9 years ago

microacup commented 9 years ago
  1. 解决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方法添加一个Fragment的时候出现的,后来在官网找到了相关的 说明:http://developer.android.com/reference/android/app/FragmentTransaction.html#commitAllowingStateLoss()

大致意思是说我使用的 commit方法是在Activity的onSaveInstanceState()之后调用的,这样会出错,因为onSaveInstanceState 方法是在该Activity即将被销毁前调用,来保存Activity数据的,如果在保存玩状态后再给它添加Fragment就会出错。解决办法就 是把commit()方法替换成 commitAllowingStateLoss()就行了,其效果是一样的。