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emilsjolander / StickyListHeaders

An android library for section headers that stick to the top
Apache License 2.0
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Null pointer exception when recycler view scrolled after adding Header items dynamically #476

Open GaganBhatia opened 7 years ago

GaganBhatia commented 7 years ago

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 commented 6 years ago

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

badonla65 commented 6 years ago

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