Added View has RecyclerView as parent but view is not a real child

[captain-miao]

java.lang.IllegalStateException: Added View has RecyclerView as parent but view is not a real child. Unfiltered index:0
at android.support.v7.widget.RecyclerView$LayoutManager.addViewInt(RecyclerView.java:6720)
at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:6686)
at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:6674)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1404)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1353)
at android.support.v7.widget.LinearLayoutManager.scrollBy(LinearLayoutManager.java:1180)
at android.support.v7.widget.LinearLayoutManager.scrollVerticallyBy(LinearLayoutManager.java:1031)
at android.support.v7.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:4061)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:603)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)