Android Question Problem with rotated customListView on Android 9

Seems to work fine here on Android 9.

1. Why aren't you using xCustomListView library? It is a mistake to use the class.

2. Why not rotate each item separately? Will probably work better.

1) I am using the class because i need to add some other codes to xCLV (for example i found here on the forum a modified version with selection mode, i added a sub to resize an item and shift the others intead of removing and adding it back, etc)

2) I created a chat application. When i scroll back messages and i reach the top of scrollview i add old messages to the top. After i add, for example, one message to the top i scroll down programmatically to the original top item. If i add dozens of messages to the top i can see a ugly "bouncing" effect on the scrollview items. So i created a workaround by rotating the CLV so when i scroll to the top of CLV in the reality i scrolled to the bottom to the CLV and i add old messages to the bottom of CLV and in this way i don't need to jump programmatically to the original top item.
By rotating CLV by 180 i need of course to rotate all the items too so in this way all items appear straight on the screen.
(https://www.b4x.com/android/forum/t...m-with-getscrollviewoffset.95845/#post-605683)


Here the link to video about the strange behaviour i have on my android 9 device: https://photos.app.goo.gl/YRMXnfEQgHAkNTLv5
(Sorry i can't upload it here on the forum due to a size limitation)

FrankBerra said:

for example i found here on the forum a modified version with selection mode, i added a sub to resize an item and shift the others intead of removing and adding it back, etc

Click to expand...

Resizing items is supported in xCLV. You can also implement different selection models without modifying the code.

About the rotation, this is handled by the OS so I don't think that there is much that you can do.

Ok thank you
I found other informations about: https://issuetracker.google.com/issues/112385925

Is it possible in some way (with reflection?) to apply an inverted "momentum" to the scrollview....or at least stop it on android 9?

FrankBerra said:

Is it possible in some way (with reflection?) to apply an inverted "momentum" to the scrollview

Click to expand...

I don't think so.

I tryed to handle the scrollview with Gesture Detector library. In this way, at least, i disable the "momentum".
Here following the code i used if anyone is facing the same problem:


Suggestions for improvements are wellcome!