IssueTracker

Component used: ListRowPresenter, GridLayoutManager, BrowseSupportFragment Version used: All versions of leanback library Devices/Android versions reproduced on: The problem appears on Crashlytics on all different devices. For all android versions.

SWTV-22AE-FHD (Android 11), MiTV-ASTP0 (Android 9) Philips Android TV (Android 9) Formuler Z10 Pro (Android 10) and other Android TV devices

This is a bug in the library, related to Leanback GridView and Recyclerview

• Sample project: https://github.com/linimin/lbry-androidtv If it is not accessible I can provide source code

FATAL EXCEPTION: main Process: <packaheName>, PID: 6461 java.lang.NullPointerException: Attempt to invoke virtual method 'void androidx.recyclerview.widget.RecyclerView$Recycler.unscrapView(androidx.recyclerview.widget.RecyclerView$ViewHolder)' on a null object reference at androidx.recyclerview.widget.RecyclerView$ViewHolder.unScrap(RecyclerView.java:12050) at androidx.recyclerview.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:6735) at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6688) at androidx.recyclerview.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:6684) at androidx.leanback.widget.GridLayoutManager.getViewForPosition(GridLayoutManager.java:1158) at androidx.leanback.widget.GridLayoutManager$2.createItem(GridLayoutManager.java:1695) at androidx.leanback.widget.SingleRow.appendVisibleItems(SingleRow.java:115) at androidx.leanback.widget.Grid.appendOneColumnVisibleItems(Grid.java:400) at androidx.leanback.widget.GridLayoutManager.appendOneColumnVisibleItems(GridLayoutManager.java:1919) at androidx.leanback.widget.GridLayoutManager.onLayoutChildren(GridLayoutManager.java:2355) at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:4604) at androidx.recyclerview.widget.RecyclerView.dispatchLayout(RecyclerView.java:4307) at androidx.recyclerview.widget.RecyclerView.onLayout(RecyclerView.java:4873) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673) at android.widget.LinearLayout.onLayout(LinearLayout.java:1582) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673) at android.widget.LinearLayout.onLayout(LinearLayout.java:1582) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at androidx.recyclerview.widget.RecyclerView$LayoutManager.layoutDecoratedWithMargins(RecyclerView.java:10321) at androidx.leanback.widget.GridLayoutManager.layoutChild(GridLayoutManager.java:1856) at androidx.leanback.widget.GridLayoutManager.fastRelayout(GridLayoutManager.java:2076) at androidx.leanback.widget.GridLayoutManager.onLayoutChildren(GridLayoutManager.java:2339) at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:4604) at androidx.recyclerview.widget.RecyclerView.dispatchLayout(RecyclerView.java:4307) at androidx.recyclerview.widget.RecyclerView.onLayout(RecyclerView.java:4873) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at androidx.leanback.widget.ScaleFrameLayout.onLayout(ScaleFrameLayout.java:172) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673) at android.widget.LinearLayout.onLayout(LinearLayout.java:1582) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at com.android.internal.policy.DecorView.onLayout(DecorView.java:784) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:3470) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2938) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1952) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8184) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:972) at android.view.Choreographer.doCallbacks(Choreographer.java:796) at android.view.Choreographer.doFrame(Choreographer.java:731) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:957) at android.os.Handler.handleCallback(Handler.java:938) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7656) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)