From d810e6c82df6e6cf8e8a7cfcf0d1449bfae9e115 Mon Sep 17 00:00:00 2001 From: Viktor De Pasquale Date: Sat, 11 Apr 2020 17:58:10 +0200 Subject: [PATCH] Fixed modules screen crashing on load This commit fixes the issue of adding single-span items in between full-span items whilst using `StaggeredGridLayoutManager` on recycler view. Adding such items results in: ``` java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 13 at java.util.Arrays.rangeCheck(Arrays.java:123) at java.util.Arrays.fill(Arrays.java:2828) at androidx.recyclerview.widget.StaggeredGridLayoutManager$LazySpanLookup.invalidateAfter(StaggeredGridLayoutManager.java:2876) at androidx.recyclerview.widget.StaggeredGridLayoutManager.handleUpdate(StaggeredGridLayoutManager.java:1548) at androidx.recyclerview.widget.StaggeredGridLayoutManager.onItemsUpdated(StaggeredGridLayoutManager.java:1524) at androidx.recyclerview.widget.RecyclerView$6.dispatchUpdate(RecyclerView.java:1021) at androidx.recyclerview.widget.RecyclerView$6.onDispatchSecondPass(RecyclerView.java:1032) at androidx.recyclerview.widget.AdapterHelper.consumePostponedUpdates(AdapterHelper.java:121) at androidx.recyclerview.widget.AdapterHelper.consumeUpdatesInOnePass(AdapterHelper.java:557) at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:4128) at androidx.recyclerview.widget.RecyclerView.dispatchLayout(RecyclerView.java:3851) at androidx.recyclerview.widget.RecyclerView.onLayout(RecyclerView.java:4404) ...and more ``` Affects versions including and prior to androidx.recyclerview:recyclerview:1.2.0-alpha02 (at the time of this commit) and possibly more after that. This bug is caused by a single fact and that is - array inside of `LazySpanLookup` is not being invalidated and resized correctly when non-full-span item is being added in between of two full-span items. The invalidation however passes on some (high performance) devices so it doesn't necessarily cause issues for _some_ users; others keep getting the same crash over and over again. Possible fix for anyone reading this, in the hope of fixing the same error, is to copy-paste the `StaggeredGridLayoutManager` and fix the array length before calling `Arrays.fill()`. There's no fix from user's perspective if you need to keep the UI as-is. We however don't need the UI as-is, so we're instead opting to use LinearLayoutManager until is the issue resolved. Continues tracking at https://issuetracker.google.com/issues/37034096 Close #2631 --- app/src/main/res/layout/fragment_module_md2.xml | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/app/src/main/res/layout/fragment_module_md2.xml b/app/src/main/res/layout/fragment_module_md2.xml index 4baa39d40..bc76c7837 100644 --- a/app/src/main/res/layout/fragment_module_md2.xml +++ b/app/src/main/res/layout/fragment_module_md2.xml @@ -17,6 +17,17 @@ android:layout_width="match_parent" android:layout_height="match_parent"> + +