ViewPager里面片段FragmentPagerAdapter开始交易时，应用程序崩溃 [英] ViewPager with FragmentPagerAdapter inside Fragment crashes Application when starting Transaction

问题描述

我有一个ViewPager带片段内FragmentPagerAdapter，这是我一个的FrameLayout内显示。
一切工作正常，到目前为止，我可以在完全没有问题的片段之间交换我的FrameLayout里。

I have a ViewPager with a FragmentPagerAdapter inside a Fragment, which I display inside a FrameLayout. Everything works fine so far, I can swap between Fragments inside my FrameLayout with no problems at all.

但如果我轻弹ViewPager，然后快速交换到不同的片段中旬动画，我这个错误，应用程序崩溃：

BUT if I flick the ViewPager and then fast swap to a different Fragment mid animation, I this Error and the App crashes:

12-20 03:00:14.539: E/AndroidRuntime(20193): FATAL EXCEPTION: main
12-20 03:00:14.539: E/AndroidRuntime(20193): java.lang.IllegalArgumentException: No view found for id 0x7f0a002f for fragment NewsPagerFragment{4184f340 #4 id=0x7f0a002f android:switcher:2131361839:3}
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:822)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.app.FragmentManagerImpl.attachFragment(FragmentManager.java:1206)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.app.BackStackRecord.run(BackStackRecord.java:612)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1382)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:437)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.support.v13.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:145)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.support.v4.view.ViewPager.populate(ViewPager.java:1068)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.support.v4.view.ViewPager.populate(ViewPager.java:914)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.support.v4.view.ViewPager$3.run(ViewPager.java:244)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.os.Handler.handleCallback(Handler.java:605)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.os.Handler.dispatchMessage(Handler.java:92)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.os.Looper.loop(Looper.java:137)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at android.app.ActivityThread.main(ActivityThread.java:4514)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at java.lang.reflect.Method.invokeNative(Native Method)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at java.lang.reflect.Method.invoke(Method.java:511)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
12-20 03:00:14.539: E/AndroidRuntime(20193):    at dalvik.system.NativeStart.main(Native Method)

我重新创建片段我每次回到这个片段的时间，所以我不会被切换或类似的东西之前摧毁片段介意找到一种方法，只是忽略这个错误，例如说..任何人都得到了一个主意如何处理这个问题？

I recreate the Fragments every time I come back to this fragment, so I wouldn't mind to find a way to just ignore this error, for example by destroying the fragments before switching or something like that.. anyone got an idea how to handle this problem?

编辑：
好了一个解决这个问题的方法是使用

Okay one way to fix this is to use

mViewPager.setCurrentItem(0);

右键改变片段之前，这样的viewpager将开始一个新的事务，并在切换之前完成它

Right before changing the fragment, that way the viewpager will start a new transaction and finish it before switching

EDIT2：
还有一个办法解决它。

One more way to fix it

mViewPager.isDirty()

如果返回true，不要开关

if this returns true, dont switch

推荐答案

好吧来解决这个问题的一种方法是使用

Okay one way to fix this is to use

mViewPager.setCurrentItem(0);

右键改变片段之前，这样的viewpager将开始一个新的事务，并在切换之前完成它

Right before changing the fragment, that way the viewpager will start a new transaction and finish it before switching

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