How to scroll to show a node?

[ModestinoAndre]

Hi.

I have a big tree and I need to make a specific node visible (on screen center). In other words, I need scroll to that node programmatically. For example: treeView.scrollTo(node127); Can you help me?

Sorry my bad english.

Thanks!

[bmelnychuk]

Sorry for late response, TreeView is just ScrollView so you can work with tree in the same way. You can try to play with scrollTo method

[1240]

Hi. Sorry but AndroidTreeView not ScrollView... is just Class, so. How to use TreeView like ScrollView ? I need to pass AndroidTreeView.getView() into PlaceHolder, how I can do this.

p.s. Sorry for my bad english. Thanks alot.

[bmelnychuk]

AndroidTreeView.getView() is ScrollView, you can check implementation, you should be able to add this to any container. This can be also FrameLayout if you enable 2d scrolling (see example)

[altagir]

Anyone had luck trying this ? scrollViewTreeView?.scrollTo doesn't have any effect

upon using scrollview->scrollTo

 if (getChildCount() > 0) {
            View child = getChildAt(0);
            x = clamp(x, getWidth() - mPaddingRight - mPaddingLeft, child.getWidth());
            y = clamp(y, getHeight() - mPaddingBottom - mPaddingTop, child.getHeight());
            if (x != mScrollX || y != mScrollY) {
                super.scrollTo(x, y);
            }
        }

getChildCount = 1 and width and height are always the same (total size of scrollView) instead of the child element being focused to

[alierdogan7]

Please see this answer:

https://github.com/bmelnychuk/AndroidTreeView/issues/152#issuecomment-614309243