RecyclerView ViewPager java.lang.NullPointerException android.support.v7.widget.RecyclerView $ ItemAnimator $ ItemHolderInfo.left

我使用ViewPager与Recyclerview,但在创build时间崩溃…

我试着用Recyclerview.Adapter AsyncListUtil,它的工作。 当我将片段移动到ViewPager时,它开始像这样崩溃。 任何见解?

FATAL EXCEPTION: main Process: com.dekanski.popularmovies, PID: 6554 java.lang.NullPointerException: Attempt to read from field 'int android.support.v7.widget.RecyclerView$ItemAnimator$ItemHolderInfo.left' on a null object reference at android.support.v7.widget.SimpleItemAnimator.animateChange(SimpleItemAnimator.java:130) at android.support.v7.widget.RecyclerView.animateChange(RecyclerView.java:3062) at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2924) at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3071) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.support.v4.view.ViewPager.onLayout(ViewPager.java:1627) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.support.design.widget.CoordinatorLayout.layoutChild(CoordinatorLayout.java:1037) at android.support.design.widget.CoordinatorLayout.onLayoutChild(CoordinatorLayout.java:747) at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:761) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) at android.widget.FrameLayout.onLayout(FrameLayout.java:514) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557) at android.widget.LinearLayout.onLayout(LinearLayout.java:1466) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) at android.widget.FrameLayout.onLayout(FrameLayout.java:514) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557) at android.widget.LinearLayout.onLayout(LinearLayout.java:1466) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579) at android.widget.FrameLayout.onLayout(FrameLayout.java:514) at android.view.View.layout(View.java:15671) at android.view.ViewGroup.layout(ViewGroup.java:5038) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2086) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1843) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) at android.view.Choreographer.doCallbacks(Choreographer.java:580) at android.view.Choreographer.doFrame(Choreographer.java:550) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5254) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 

这似乎是支持版本23.2.1固定

我已经想通了…我错过了包括应用程序:layout_behavior =“@string/ appbar_scrolling_view_behavior”viewpager,所以CoordinatorLayout不知道如何做它的工作正确。

使用更具体的notifyItem{Inserted,Removed,...}变体replace对RecyclerView.Adapter.notifyDataSetChanged()所有调用之后,崩溃似乎已经消失了。

它与23.2.0的问题。 使用23.2.1:

 compile 'com.android.support:design:23.2.1'