I built an endless horizontal recycler view similar to the one in the solution of this post: How do I create a circular (endless) RecyclerView? with 5 total items.
Currently because the count of the list is Int.MAX_INTEGER, TalkBack dictates the view as
"1073741820 of 2147483650, in list, 2147483650 items"
For Accessibility, what can I do to have TalkBack to describe the contents of each item as
"1 of 5, in list, 5 items" etc for each item.
This may help you
private fun setupAccessibility() {
val recyclerView = binding.viewPager.getChildAt(0) as? RecyclerView ?: return
recyclerView.setAccessibilityDelegateCompat(object :
RecyclerViewAccessibilityDelegate(recyclerView) {
override fun onInitializeAccessibilityNodeInfo(
host: View?,
info: AccessibilityNodeInfoCompat?
) {
super.onInitializeAccessibilityNodeInfo(host, info)
info?.collectionInfo?.run {
info.setCollectionInfo(
AccessibilityNodeInfoCompat.CollectionInfoCompat.obtain(
max(1, rowCount % ITEMS_COUNT),
max(1, columnCount % ITEMS_COUNT),
isHierarchical,
selectionMode
)
)
}
}
override fun sendAccessibilityEventUnchecked(host: View?, event: AccessibilityEvent?) {
super.sendAccessibilityEventUnchecked(host, event)
event?.apply {
fromIndex %= ITEMS_COUNT
toIndex %= ITEMS_COUNT
itemCount = ITEMS_COUNT
}
}
override fun onInitializeAccessibilityEvent(host: View?, event: AccessibilityEvent?) {
super.onInitializeAccessibilityEvent(host, event)
event?.apply {
fromIndex %= ITEMS_COUNT
toIndex %= ITEMS_COUNT
itemCount = ITEMS_COUNT
}
}
override fun getItemDelegate(): AccessibilityDelegateCompat {
return object : ItemDelegate(this) {
override fun onInitializeAccessibilityNodeInfo(
host: View?,
info: AccessibilityNodeInfoCompat?
) {
super.onInitializeAccessibilityNodeInfo(host, info)
info?.collectionItemInfo?.run {
info.setCollectionItemInfo(
AccessibilityNodeInfoCompat.CollectionItemInfoCompat.obtain(
rowIndex % ITEMS_COUNT,
rowSpan,
columnIndex % ITEMS_COUNT,
columnSpan,
info.isHeading,
isSelected
)
)
}
}
}
}
})
}
Where ITEMS_COUNT is actual number of items (data items count)
The number can be changed using AccessibilityDelegateCompat, specifically, CollectionInfoCompat would allow to set rowCount to 5, instead of Int.MAX_INTEGER.
However, with this, custom circular navigation likely would not work anymore when using Talkback.
