Attempt to read from field 'android.view.View android.support.v7.widget.RecyclerView$ViewHolder.itemView'

Fatal Exception: java.lang.NullPointerException
Attempt to read from field 'android.view.View android.support.v7.widget.RecyclerView$ViewHolder.itemView' on a null object reference
android.support.v7.widget.DefaultItemAnimator.runPendingAnimations (DefaultItemAnimator.java:157)
android.support.v7.widget.RecyclerView$2.run (RecyclerView.java:589)
android.view.Choreographer$CallbackRecord.run (Choreographer.java:911)
android.view.Choreographer.doCallbacks (Choreographer.java:713)
android.view.Choreographer.doFrame (Choreographer.java:645)
android.view.Choreographer$FrameDisplayEventReceiver.run (Choreographer.java:897)
android.os.Handler.handleCallback (Handler.java:815)
android.os.Handler.dispatchMessage (Handler.java:104)
android.os.Looper.loop (Looper.java:207)
android.app.ActivityThread.main (ActivityThread.java:5790)
java.lang.reflect.Method.invoke (Method.java)
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1015)
com.android.internal.os.ZygoteInit.main (ZygoteInit.java:876)