java.lang.IllegalStateException: Added View has RecyclerView as parent but view is not a real child. Unfiltered index:0

Hi, I use expandable and draggable adapter in my app. Some users crashed when use my app, but I can’t response this crash.

Here’s the crash log, I want to know if there’s any other people has this crash? And how to solve it?

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$LayoutManager.addViewInt(RecyclerView.java:6071)
    at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:6037)
    at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:6025)
    at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1378)
    at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1327)
    at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:556)
    at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2713)
    at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3011)
    at android.view.View.layout(View.java:14858)
    at android.view.ViewGroup.layout(ViewGroup.java:4646)
    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1673)
    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1527)
    at android.widget.LinearLayout.onLayout(LinearLayout.java:1436)
    at android.view.View.layout(View.java:14858)
    at android.view.ViewGroup.layout(ViewGroup.java:4646)
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
    at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
    at android.view.View.layout(View.java:14858)
    at android.view.ViewGroup.layout(ViewGroup.java:4646)
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
    at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
    at android.view.View.layout(View.java:14858)
    at android.view.ViewGroup.layout(ViewGroup.java:4646)
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
    at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
    at android.view.View.layout(View.java:14858)
    at android.view.ViewGroup.layout(ViewGroup.java:4646)
    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1673)
    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1527)
    at android.widget.LinearLayout.onLayout(LinearLayout.java:1436)
    at android.view.View.layout(View.java:14858)
    at android.view.ViewGroup.layout(ViewGroup.java:4646)
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
    at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
    at android.view.View.layout(View.java:14858)
    at android.view.ViewGroup.layout(ViewGroup.java:4646)
    at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2035)
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1792)
    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1047)
    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5896)
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
    at android.view.Choreographer.doCallbacks(Choreographer.java:574)
    at android.view.Choreographer.doFrame(Choreographer.java:544)
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
    at android.os.Handler.handleCallback(Handler.java:733)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5103)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:606)
    at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132)
    at dalvik.system.NativeStart.main(Native Method)

[crazymajax]

I had the same error and the solution for me was to no longer specify my own ids. So I removed the following lines of code and it started working again:

  public MyAdapter(Context context) {
      this.context = context;
-     setHasStableIds(true)   // <----- removed this
  }

and all of this:

 -    @Override     
 -    public long getItemId(int position) {     
 -        return position;      
 -    }

[GauthierChan]

I had the same error when using the Swipe adapter and removing/adding elements. It was related to duplicate IDs given to items. (2 items had the same ID, if I clicked on the second item -> crash).

Once I made sure every IDs were unique everything worked fine.

Hope it helps you.