Android Question Scrollview.ScrollPosition

[Semen Matusovskiy]

Relative to topic https://www.b4x.com/android/forum/threads/callsubdelayed-scrollview-scrollposition.76280/

This works, for example, in KitKat.
But what about Android 7/8 ? (does not work according my tests) ScrollPosition returns new value, but actually there is no scroll.

 

[KMatle]

Add

Sleep(0)

after you set the new pos to let Android get the time to scroll. Breakpoints may interfer the scrolling, too.

 

[Semen Matusovskiy]

I used Sleep before and after changing. Doesn't work on my Android 7 & 8 phones.

Log (scrollviewInstance.ScrollPosition & " " & intScrollPosition)
scrollviewInstance.ScrollToNow (intScrollPosition)
Sleep (0)
Log (scrollviewInstance.ScrollPosition & " " & intScrollPosition)
scrollviewInstance.ScrollPosition = intScrollPosition
Sleep (0)
Log (scrollviewInstance.ScrollPosition & " " & intScrollPosition)

Log :
0 10585
10585 10585
10585 10585

Looks Ok, but zero effect (does not scroll at all or scrolls to another position)

 

[KMatle]

Hm. Are you testing in release mode? I had some issues when I set breakpoints before/after settng the pos.

 

[Semen Matusovskiy]

Yes, in release mode
Under Android 4.4 (Samsung Galaxy s4) all worked with sleep (1).

I found a problem. I correct scroll position in some events, including IME. It looks that under different OSes there is another sequence of events. To my surprise, I found IME events like reaction to HideKeyboard (keyboard was not opened).

 

[Erel]

Use ScrollView.ScrollToNow if you want to change it immediately.

 

[Knoppi]

I have the same problem
I found
https://www.b4x.com/android/forum/t...ion-in-sub-activity_create.29668/#post-513972

This works for me with Android 7 and b4a 8.00

NewPosition = 120
Sleep (0)
scvBase.ScrollToNow( NewPosition )
Log( "ScrollPosition: "&TAB& scvBase.ScrollPosition)

Logs

ScrollPosition: 120

 

[Erel]

It should be 120dip