Null pointer exception when recycler view scrolled after adding Header items dynamically

[GaganBhatia]

I have created 3 DataBean class out of which 1 is sticky
At starting it's work fine, but after appending the data to the list it get crashed while scorlling.

It says "Databean is null", but I don't know how it is coming null.
As while creating the data for the list I creat "new" data bean class.

When i checked for same in Sample code , and added new users from Add Sticky View option from menu (changed the added users to be stickyheader in the code setting user.setShouldSticky(true); for all) the app crashed on scroll down.Please find the Log for the same.

Please look into the issue.
Thanks.

Log for 3 Databean model with 1 sticky header : -
java.lang.NullPointerException: Attempt to invoke virtual method 'int tellh.com.stickyheaderview_rv.adapter.DataBean.getItemLayoutId(tellh.com.stickyheaderview_rv.adapter.StickyHeaderViewAdapter)' on a null object reference
at tellh.com.stickyheaderview_rv.StickyHeaderView.updateHeaderView(StickyHeaderView.java:138)
at tellh.com.stickyheaderview_rv.StickyHeaderView.access$800(StickyHeaderView.java:22)
at tellh.com.stickyheaderview_rv.StickyHeaderView$1.onScrolled(StickyHeaderView.java:112)
at android.support.v7.widget.RecyclerView.dispatchOnScrolled(RecyclerView.java:4618)
at android.support.v7.widget.RecyclerView.scrollByInternal(RecyclerView.java:1723)
at android.support.v7.widget.RecyclerView.onTouchEvent(RecyclerView.java:2883)
at android.view.View.dispatchTouchEvent(View.java:8476)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2401)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2092)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2369)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1719)
at android.app.Activity.dispatchTouchEvent(Activity.java:2752)
at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:71)
at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:71)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2330)
at android.view.View.dispatchPointerEvent(View.java:8671)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4193)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4059)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3604)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3657)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3623)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3740)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3631)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3797)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3604)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3657)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3623)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3631)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3604)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5912)
at android.view.ViewRootImpl.doProces

---

Log for Sample Code ----->
java.lang.NullPointerException: Attempt to invoke virtual method 'int tellh.com.stickyheaderview_rv.adapter.DataBean.getItemLayoutId(tellh.com.stickyheaderview_rv.adapter.StickyHeaderViewAdapter)' on a null object reference
at tellh.com.stickyheaderview_rv.StickyHeaderView.updateHeaderView(StickyHeaderView.java:138)
at tellh.com.stickyheaderview_rv.StickyHeaderView.access$800(StickyHeaderView.java:22)
at tellh.com.stickyheaderview_rv.StickyHeaderView$1.onScrolled(StickyHeaderView.java:112)
at android.support.v7.widget.RecyclerView.dispatchOnScrolled(RecyclerView.java:4541)
at android.support.v7.widget.RecyclerView.scrollByInternal(RecyclerView.java:1698)
at android.support.v7.widget.RecyclerView.onTouchEvent(RecyclerView.java:2827)
at android.view.View.dispatchTouchEvent(View.java:8476)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2401)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2092)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2407)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2106)
at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2369)
at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1719)
at android.app.Activity.dispatchTouchEvent(Activity.java:2752)
at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:71)
at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2330)
at android.view.View.dispatchPointerEvent(View.java:8671)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4193)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4059)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3604)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3657)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3623)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3740)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3631)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3797)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3604)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3657)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3623)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3631)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3604)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5912)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5851)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5822)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6002)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:192)
at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
at and

[badonla65]

I am testing on sdk 21. I don't perfect. I want help Eric.

[badonla65]

I am testing on sdk 21. I don't perfect. I want help.