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1、先来看看出错的日志 java.lang.IllegalStateException: Can’t change tag of fragment CustomFuctionFragment{eeb755a #0 id=0x7f090341 android:switcher:2131297089:0}: was android:switcher:2131297089:0 now android:s

错误： java.lang.NullPointerException at com.lala.Home.hideLoadinganimation(Home.java:969) at com.lala.Home.access$4(Home.java:967) at com.lala.Home$17.onFinish(Home.java:892) at com.loopj.android.http.A

Process: learnknow.ibn.com.lezhiteacherpad, PID: 21844     java.lang.IllegalStateException: Can't change tag of fragment CompositionDataAnalysisFragment{16ad829a id=0x7f090163 android:switcher:2131296

Process: com.ws.storehouse, PID: 2937 java.lang.IllegalStateException: Fragment already added: MainFragment{3bf077c2} (f057265a-9d7e-4720-b2ed-9aca72e54f7b) id=0x7f08012e android:switcher:21312310

错误信息： java.lang.IllegalStateException: Can't change tag of fragment TransferFragment{6e857a4 (3f474cec-7622-4fbd-aeb3-b975f87bbc15) id=0x7f0800ea android:switcher:2131230954:0}: was android:switcher:2

        在应用里用到了 ViewPager 和 FragmentPagerAdapter  实现多页滑动，每一页都是一个Fragment。         当需要对某个Fragment进行操作时，就要获取到这个Fragment（Fragment之间通信有几种方式，在这直说Tag），但是并没有去设置Tag。当我们通过getFragmentManager().beginTransaction(

java.lang.IllegalStateException: Fragment already added: GoodsDetailFragment{47ad471 #0 id=0x7f0903f9 android:switcher:2131297273:0} at android.support.v4.app.FragmentManagerImpl.addFragment(F

java.lang.IllegalStateException: Can't change tag of fragment fendo1MainActivity{531dbce4 id=0x7f0b0054 android:switcher:2131427412:0}: was android:switcher:2131427412:0 now android:switcher:213142741

java.lang.IllegalArgumentException: No view found for id 0xad7b9d70 (unknown) for fragment, 爬出一个findViewById的坑 最近遇到一个比较奇怪且难定位的异常，是由新功能开发而导致的，在4.4模拟器上面初始化某个界面的时候会出现崩溃，崩溃信息如下。这个异常在真机以及5.0以上的模拟器上都不会出现。 j

  Andorid完成初始加载页面后闪退，出现下面的异常信息。 java.lang.IllegalStateException: Fragment already added: xxxFragment{a26fb6d} (bfc99ad9-04b8-468b-aa9d-eebf146ca002) id=0x7f09016f android:switcher:2131296623:0}