NullPointerException in dissapearence animation of RecyclerView from support v.23.2.0

Question

In new RecyclerView we can use wrap_content for height (or for width). So Google fixed bug - https://code.google.com/p/android/issues/detail?id=74772
But not all is well in the end.
I try to use animation of dissapearence when remove item from RecyclerView. So i use method of Adapter - notifyItemRemoved(int) with any argument and RecyclerView cause NullPointerException.

Xml code:

...
    <RecyclerView
        android:id="@+id/RecyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scrollbars="vertical"
        android:overScrollMode="always"/>
    ...

Logs:

E/AndroidRuntime: FATAL EXCEPTION: main
 java.lang.NullPointerException
     at android.support.v7.widget.SimpleItemAnimator.animateDisappearance(SimpleItemAnimator.java:78)
     at android.support.v7.widget.RecyclerView.animateDisappearance(RecyclerView.java:3246)
     at android.support.v7.widget.RecyclerView.access$700(RecyclerView.java:147)
     at android.support.v7.widget.RecyclerView$4.processDisappeared(RecyclerView.java:422)
     at android.support.v7.widget.ViewInfoStore.process(ViewInfoStore.java:231)
     at android.support.v7.widget.RecyclerView.dispatchLayoutStep3(RecyclerView.java:3086)
     at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2914)
     at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3277)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1021)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1663)
     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1521)
     at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1663)
     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1521)
     at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1663)
     at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1521)
     at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
     at android.view.View.layout(View.java:14015)
     at android.view.ViewGroup.layout(ViewGroup.java:4373)
     at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1892)
     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1711)
     at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989)
     at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351)
     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
     at android.view.Choreographer.doCallbacks(Choreographer.java:562)
     at android.view.Choreographer.doFrame(Choreographer.java:532)
     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
     at android.os.Handler.handleCallback(Handler.java:725)
     at android.os.Handler.dispatchMessage(Handler.java:92)
     at android.os.Looper.loop(Looper.java:137)
     at android.app.ActivityThread.main(ActivityThread.java:5227)
     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:795)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
     at dalvik.system.NativeStart.main(Native Method)

Maybe there are temp workarounds of these problem?

EDIT
I tried to reproduce in new project. So no exceptions was thrown. Maybe in my project there are others dependencies which call this problem.

Answer 1

I had exactly the same error as the one raised in the question and in fact have raised a bug with Google for this. I did find, after delving into the framework code, that I could resolve the issue by changing the setting of HasFixedSize from FALSE to TRUE i.e. "rv.setHasFixedSize(true)". This is basically telling the RecyclerView that changes to its contents will not change the RecyclerView size thus avoiding a full layout. I had originally set this FALSE due to a mis-interpretation of its meaning. This change removes the fault for me and is a reproducible solution.