NullPointerException android.support.v4.app.FragmentManagerImpl.saveFragmentBasicState

最新推荐文章于 2022-06-29 20:56:39 发布

xiaoyitian0

最新推荐文章于 2022-06-29 20:56:39 发布

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分类专栏： Android异常问题文章标签： Android Fragment java.lang.NullPointe

本文链接：https://blog.youkuaiyun.com/xiaoyitian0/article/details/46969059

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本文详细解析了在使用ViewPager和Fragment时遇到的程序异常退出问题，通过分析异常堆栈找到了解决方案，包括为每个View分配ID及重载onSaveInstanceState方法。

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今天在使用android.support.v4.view.ViewPager和Fragment时，发现程序运行期间总是意外退出，报异常

07-20 15:44:59.453 31957-31957/com.zhang.ChatTab W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x40aa6300)
07-20 15:44:59.453 31957-31957/com.zhang.ChatTab E/AndroidRuntime﹕ FATAL EXCEPTION: main
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.support.v4.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:481)
at android.app.Activity.performSaveInstanceState(Activity.java:1137)
at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1215)
at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:3079)
at android.app.ActivityThread.handleStopActivity(ActivityThread.java:3138)
at android.app.ActivityThread.access$900(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1232)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4966)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
at dalvik.system.NativeStart.main(Native Method)