记一个FragmentActivity按Home键后强制关闭(FC)的报错

来源：互联网发布：java不区分大小写比较编辑：程序博客网时间：2024/06/06 11:38

起因:当我在FragmentActivity中实现ViewPager多页滑动时,按Home键直接报错.

报错信息:

java.lang.RuntimeException: Unable to pause activity {xx.PageViewActivity}: java.lang.NullPointerException

Caused by:java.lang.nullpointerException

at android.support.v4.app.FragmentManagerImpl.saveFragmentBasicState(FragmentManager.java:1576)

at android.support.v4.app.FragmentManagerImpl.saveAllState(FragmentManager.java:1617)

at android.app.Activity.performSaveInstanceState(Activity.java:1061)

查了相当多的资料.当然也有国外网站的.资料甚少,

一是用了android.support.v4包,

二是FragmentActivity.

翻了翻的 Pro android 3也没有半句讲到FragmentActivity..

解决方案: outState 对象为空..在onSaveInstanceState()函数中不使用到outState即可.

@Overrideprotected void onSaveInstanceState(Bundle outState) {// TODO Auto-generated method stub //super.onSaveInstanceState(outState);}

让我不解的是Activity中不重写 onSaveInstanceState()也会报空指针.FragmentActivity中就有问题.?