kotlin.TypeCastException: null cannot be cast to non-null type com.kizitonwose.calendarview.ui.MonthViewHolder

[kizitonwose]

kotlin.TypeCastException: null cannot be cast to non-null type com.kizitonwose.calendarview.ui.MonthViewHolder

[kizitonwose]

This issue is fixed in the fix-crash branch but has not been released yet.
You can get the fix using: implementation 'com.github.kizitonwose:CalendarView:7da609173c' until version 0.2.5 is released.

[kizitonwose]

It seems you are using an older version of the library as this issue has already been fixed. See #29.

Can you confirm that you are on the latest version of the library? Otherwise, update to the latest version and see if the issue persists.

[federicomiralles]

@kizitonwose I'm using the latest version:
implementation 'com.github.kizitonwose:CalendarView:0.2.4'
Cheers,

Federico

[federicomiralles]

Looks like the problem isn't related to the Don't keep activities configuration, but when it's used inside a viewpager within a fragment.
My current layout hierarchy is like follows:
activity layout -> viewpager -> fragment layout -> calendar view
Swiping back and forth between the pages (in my case the calendar in the third page) several times triggers the exception...

[federicomiralles]

As workaround I ended up setting a fixed height for the calendarView (instead using wrap_content) to overcome the TypeCastException.
Not the best solution but at least it doesn't crash...

[kizitonwose]

Version 0.2.5 is released. You can now revert to implementation 'com.github.kizitonwose:CalendarView:0.2.5'

[raymondbarrinuevo]

hi @kizitonwose

I am still having this issue. I am using this version implementation 'com.github.kizitonwose:CalendarView:0.3.2'

Fatal Exception: kotlin.TypeCastException: null cannot be cast to non-null type com.kizitonwose.calendarview.ui.DayBinder<com.kizitonwose.calendarview.ui.ViewContainer>
at com.kizitonwose.calendarview.ui.CalendarAdapter.onCreateViewHolder(CalendarAdapter.kt:134)
at com.kizitonwose.calendarview.ui.CalendarAdapter.onCreateViewHolder(CalendarAdapter.kt:29)
at androidx.recyclerview.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:7078)
at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6235)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6118)
at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6114)
at androidx.recyclerview.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2303)
at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1627)
at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1587)
at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:665)
at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:4134)
at androidx.recyclerview.widget.RecyclerView.dispatchLayout(RecyclerView.java:3851)
at androidx.recyclerview.widget.RecyclerView.onLayout(RecyclerView.java:4404)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1565)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1565)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1565)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at androidx.drawerlayout.widget.DrawerLayout.onLayout(DrawerLayout.java:1231)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1565)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1565)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1565)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1812)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1656)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1565)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:323)
at android.widget.FrameLayout.onLayout(FrameLayout.java:261)
at com.android.internal.policy.DecorView.onLayout(DecorView.java:1067)
at android.view.View.layout(View.java:22415)
at android.view.ViewGroup.layout(ViewGroup.java:6594)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:3427)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2894)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1942)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8595)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:988)
at android.view.Choreographer.doCallbacks(Choreographer.java:765)
at android.view.Choreographer.doFrame(Choreographer.java:700)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:967)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7156)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:975)