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Updated the 'scrollToBottom' behaviour to be more efficient

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This commit is contained in:
Morgan Pretty 2023-01-20 09:19:29 +11:00
parent 810430e806
commit afa42daab1
1 changed files with 15 additions and 2 deletions
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17
app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationActivityV2.kt
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@ -315,11 +315,24 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
restoreDraftIfNeeded()
setUpUiStateObserver()
binding!!.scrollToBottomButton.setOnClickListener {
val layoutManager = binding?.conversationRecyclerView?.layoutManager ?: return@setOnClickListener
val layoutManager = (binding?.conversationRecyclerView?.layoutManager as? LinearLayoutManager) ?: return@setOnClickListener
if (layoutManager.isSmoothScrolling) {
binding?.conversationRecyclerView?.scrollToPosition(0)
} else {
binding?.conversationRecyclerView?.smoothScrollToPosition(0)
// It looks like 'smoothScrollToPosition' will actually load all intermediate items in
// order to do the scroll, this can be very slow if there are a lot of messages so
// instead we check the current position and if there are more than 10 items to scroll
// we jump instantly to the 10th item and scroll from there (this should happen quick
// enough to give a similar scroll effect without having to load everything)
val position = layoutManager.findFirstVisibleItemPosition()
if (position > 10) {
binding?.conversationRecyclerView?.scrollToPosition(10)
}
binding?.conversationRecyclerView?.post {
binding?.conversationRecyclerView?.smoothScrollToPosition(0)
}
}
}
unreadCount = mmsSmsDb.getUnreadCount(viewModel.threadId)