Android Question Scrollview.ScrollPosition

KMatle

Expert

Licensed User

Longtime User

• Apr 5, 2018

• #2

Add

B4X:

Sleep(0)

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

 

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Semen Matusovskiy

Well-Known Member

Licensed User

• Apr 5, 2018

• #3

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

B4X:

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)

 

Last edited: Apr 5, 2018

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KMatle

Expert

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Longtime User

• Apr 5, 2018

• #4

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

 

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Semen Matusovskiy

Well-Known Member

Licensed User

• Apr 5, 2018

• #5

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).

 

Last edited: Apr 6, 2018

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Erel

B4X founder

Staff member

Licensed User

Longtime User

• Apr 8, 2018

• #6

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

 

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Knoppi

Active Member

Licensed User

Longtime User

• Apr 8, 2018

• #7

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

B4X:

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

Logs

ScrollPosition: 120

Click to expand...

 

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Erel

B4X founder

Staff member

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Longtime User

• Apr 9, 2018

• #8

It should be 120dip

 

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