crash by android.support.v7.widget.StaggeredGridLayoutManager$LazySpanLookup.invalidateAfter(StaggeredGridLayoutManager.java:2878) [160193663]

Fixed

Bug

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Description

gy...@gmail.com

created issue #1

Jun 30, 2020 07:12AM

android version:8.1.0
recyclerView- support.v7-28.0.0
Describe:
I try to update item count in RecyclerView (use StaggeredGridLayoutManager),which step is change the dataSet and invoke Adapter.notifyItemRangeInserted(int ,int) (notifyDataSetChanged will no crash but i can't use is because the staggere layout may be dislocated).This step can be invoked many times depends on http response(a http response will insert some items ,we invoke many times http request).Sometimes the application will crash but we have no idea why it is crash. The crash stack like this(full stack to see the file)

java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 46
        at java.util.Arrays.rangeCheck(Arrays.java:123)
        at java.util.Arrays.fill(Arrays.java:2831)
        at android.support.v7.widget.StaggeredGridLayoutManager$LazySpanLookup.invalidateAfter(StaggeredGridLayoutManager.java:2878)
        at android.support.v7.widget.StaggeredGridLayoutManager.handleUpdate(StaggeredGridLayoutManager.java:1550)
        at android.support.v7.widget.StaggeredGridLayoutManager.onItemsAdded(StaggeredGridLayoutManager.java:1509)
        at android.support.v7.widget.RecyclerView$6.dispatchUpdate(RecyclerView.java:1010)
        at android.support.v7.widget.RecyclerView$6.onDispatchSecondPass(RecyclerView.java:1027)
        at android.support.v7.widget.AdapterHelper.consumeUpdatesInOnePass(AdapterHelper.java:563)
        at android.support.v7.widget.RecyclerView.processAdapterUpdatesAndSetAnimationFlags(RecyclerView.java:3585)
        at android.support.v7.widget.RecyclerView.dispatchLayoutStep1(RecyclerView.java:3829)
        at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3639)
......
......

please tell me the solution to solve this problem and what is the LazySpanLookup,thanks very much.

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Comments

vi...@google.com <vi...@google.com> Jun 30, 2020 07:29AM

Assigned to vi...@google.com.

vi...@google.com <vi...@google.com> #2Jun 30, 2020 08:42AM

This isn't fixed in alpha 6 :(. It's easily reproducible by starting a drag with one finger and then tapping somewhere else (think back button) which calls clearSelection().

gy...@gmail.com <gy...@gmail.com> #3Jul 1, 2020 08:53AM

Comment from

https://b.corp.google.com/issues/128054552#comment9

gy...@gmail.com <gy...@gmail.com> #4Jul 2, 2020 10:06AM

Fix is in the works. Until then, a workaround is to avoid calling SelectionTracker#clearSelection while a gesture or mouse-band selection operation is in progress. Such a condition is likely not reflective of user intent (given the ongoing stream of selection operation), but reflective of a stray tap.

State can be monitored using OperationMonitor:

https://developer.android.com/reference/androidx/recyclerview/selection/OperationMonitor.OnChangeListener.html

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vi...@google.com <vi...@google.com> #5Jul 8, 2020 01:17PM

BTW, working on a fix for this (general improvement to state management). My unassigning this issue from me should not be construed as lack of attention to the matter. I just manage issues by hotlist (rather than ownership).

vi...@google.com <vi...@google.com> #6Jul 17, 2020 07:20AM

Rolling all state-related crash reports up into a single tracking bug.

sh...@google.com <sh...@google.com> #7Jul 21, 2020 09:01PM

Marked as fixed.

Fixed in upcoming beta01 release.