我已使用RecyclerView实现了Endless滚动。当用户点击底部我添加null对象以显示AsyncTask onPreExecute中的进度并通知适配器项已插入。这个代码我已经安静了一段时间了。最近我从23.0.3 to 24.2.1更新了Android支持库。从那以后，当我点击列表底部时，我会遇到异常。
Cannot call this method in a scroll callback. Scroll callbacks might be run during a measure & layout pass where you cannot change the RecyclerView data. Any method call that might change the structure of the RecyclerView or the adapter contents should be postponed to the next frame.
java.lang.IllegalStateException:
at android.support.v7.widget.RecyclerView.assertNotInLayoutOrScroll(RecyclerView.java:2403)
at android.support.v7.widget.RecyclerView$RecyclerViewDataObserver.onItemRangeInserted(RecyclerView.java:4634)
at android.support.v7.widget.RecyclerView$AdapterDataObservable.notifyItemRangeInserted(RecyclerView.java:10472)
at android.support.v7.widget.RecyclerView$Adapter.notifyItemInserted(RecyclerView.java:6214)
at com.test.film.buzz.BuzzFeedsFragment$5.onPreExecute(BuzzFeedsFragment.java:229)
at com.test.utils.ParallelAsyncTask.executeOnExecutor(ParallelAsyncTask.java:595)
at com.test.utils.ParallelAsyncTask.execute(ParallelAsyncTask.java:543)
at com.test.film.buzz.BuzzFeedsFragment.onLoadMore(BuzzFeedsFragment.java:258)
at com.test.film.buzz.BuzzFeedsFragment$3.onScrolled(BuzzFeedsFragment.java:177)
at android.support.v7.widget.RecyclerView.dispatchOnScrolled(RecyclerView.java:4305)
at android.support.v7.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:4463)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:871)
at android.view.Choreographer.doCallbacks(Choreographer.java:683)
at android.view.Choreographer.doFrame(Choreographer.java:616)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:857)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)