How to change android vertical scrollbar inset

Question

In iOS I can easily change the inset of the scrollbar in a UIScrollView by setting the scrollIndicatorInsets. Basically what happens is the UIScrollView size and content area stays the same, yet the scrollbar can be smaller, which is very nice when using some (semi-transparent) overlays over the top or bottom of the scrollview, since the scrollbar won't be hidden behind the overlays.

If it possible to achieve the same result in Android? Could I have a full-size scrollview, yet have a smaller sized scrollbar (e.g. scrollview begins at pixel 0 and ends at pixel 100, scrollbar begins at pixel 10 and ends at pixel 90? If possible, how do I achieve this?

winitzki · Accepted Answer · 2013-12-12 04:04:42Z

2

From what I have seen, there is no API provided by Google to do this. You may have to inherit from ScrollView and override some method to achieve this effect. Something like this, perhaps:

@Override
protected void onDrawVerticalScrollBar(Canvas canvas,
                                       Drawable scrollBar,
                                       int l, int t, int r, int b) {
    scrollBar.setBounds(l, t + mVerticalScrollInset, r, b);
    scrollBar.draw(canvas);
}

Here mVerticalScrollInset is a private variable in your class. I have a similar problem. I'm setting this variable in code, to achieve different vertical scroll insets dynamically as required by my application.

answered Dec 12, 2013 at 4:04

winitzki

3,35726 silver badges35 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Ivan Ferrer Over a year ago

how do I do this in Objective-C?

Collectives™ on Stack Overflow

How to change android vertical scrollbar inset

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related