java.lang.NullPointerException

Stack Overflow | user2359958 | 5 months ago
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    NullPointerException when expanding some/most items using support library v23.2.0

    GitHub | 9 months ago | jhavatar
    java.lang.NullPointerException: Attempt to read from field 'int android.support.v7.widget.RecyclerView$ItemAnimator$ItemHolderInfo.left' on a null object reference

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Root Cause Analysis

  1. java.lang.NullPointerException

    No message provided

    at android.support.v7.widget.RecyclerView$Adapter.createViewHolder()
  2. Android v7
    RecyclerView.onLayout
    1. android.support.v7.widget.RecyclerView$Adapter.createViewHolder(RecyclerView.java:5780)
    2. android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5003)
    3. android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4913)
    4. android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2029)
    5. android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1414)
    6. android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1377)
    7. android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:578)
    8. android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3260)
    9. android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3069)
    10. android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3518)
    10 frames
  3. Android Platform
    ViewGroup.layout
    1. android.view.View.layout(View.java:15781)
    2. android.view.ViewGroup.layout(ViewGroup.java:4884)
    3. android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
    4. android.widget.FrameLayout.onLayout(FrameLayout.java:388)
    5. android.view.View.layout(View.java:15781)
    6. android.view.ViewGroup.layout(ViewGroup.java:4884)
    7. android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
    8. android.widget.FrameLayout.onLayout(FrameLayout.java:388)
    9. android.view.View.layout(View.java:15781)
    10. android.view.ViewGroup.layout(ViewGroup.java:4884)
    11. android.widget.RelativeLayout.onLayout(RelativeLayout.java:1055)
    12. android.view.View.layout(View.java:15781)
    13. android.view.ViewGroup.layout(ViewGroup.java:4884)
    13 frames
  4. android.support.design
    CoordinatorLayout.onLayout
    1. android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:120)
    2. android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42)
    3. android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1319)
    4. android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:815)
    4 frames
  5. Android Platform
    Choreographer.doFrame
    1. android.view.View.layout(View.java:15781)
    2. android.view.ViewGroup.layout(ViewGroup.java:4884)
    3. android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
    4. android.widget.FrameLayout.onLayout(FrameLayout.java:388)
    5. android.view.View.layout(View.java:15781)
    6. android.view.ViewGroup.layout(ViewGroup.java:4884)
    7. android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
    8. android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
    9. android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
    10. android.view.View.layout(View.java:15781)
    11. android.view.ViewGroup.layout(ViewGroup.java:4884)
    12. android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
    13. android.widget.FrameLayout.onLayout(FrameLayout.java:388)
    14. android.view.View.layout(View.java:15781)
    15. android.view.ViewGroup.layout(ViewGroup.java:4884)
    16. android.widget.LinearLayout.setChildFrame(LinearLayout.java:1677)
    17. android.widget.LinearLayout.layoutVertical(LinearLayout.java:1531)
    18. android.widget.LinearLayout.onLayout(LinearLayout.java:1440)
    19. android.view.View.layout(View.java:15781)
    20. android.view.ViewGroup.layout(ViewGroup.java:4884)
    21. android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
    22. android.widget.FrameLayout.onLayout(FrameLayout.java:388)
    23. android.view.View.layout(View.java:15781)
    24. android.view.ViewGroup.layout(ViewGroup.java:4884)
    25. android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2361)
    26. android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2074)
    27. android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1256)
    28. android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6658)
    29. android.view.Choreographer$CallbackRecord.run(Choreographer.java:813)
    30. android.view.Choreographer.doCallbacks(Choreographer.java:613)
    31. android.view.Choreographer.doFrame(Choreographer.java:583)
    31 frames