setting z order of View with bringChildToFront()

Question

I'm trying to set the z order of a UI element (i.e. a View) so that it will overlap another element, but calling ViewGroup.bringChildToFront() has a weird side effect....it moves the element to be the last item in the parent (the ViewGroup). Is this a bug, expected behavior, or what? More importantly, how can I set the z order or a View without this unfortunate side effect?

score 20 · Accepted Answer · answered Sep 18 '10 at 05:05

20

This is the expected behavior. bringChildToFront() just changes the index of the View inside its parent.

answered Sep 18 '10 at 05:05

Romain Guy

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score 15 · Answer 2 · edited Apr 17 '15 at 16:23

15

To send a view all the way back, do this:

private void moveToBack(View currentView) {
    ViewGroup viewGroup = ((ViewGroup) currentView.getParent());
    int index = viewGroup.indexOfChild(currentView);
    for(int i = 0; i<index; i++) {
        viewGroup.bringChildToFront(viewGroup.getChildAt(i));
    }
}

edited Apr 17 '15 at 16:23

GreyCat

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answered Nov 11 '12 at 17:14

Kumar

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"i" instead of "0" at `vg.bringChildToFront(vg.getChildAt(0));` – Jorge Gil Mar 22 '13 at 00:00

score 0 · Answer 3 · edited Jul 14 '11 at 06:10

0

bringChildToFront(child) does nothing but changes the index value of the child.

In order to bring a child to the front without using showNext() or showprevious(),

use

setDisplayedChild() and indexOfChild() together.

example

vf.setDisplayedChild(vf.indexOfChild(child));

where child is the view that needs to be brought front.

Thanks

edited Jul 14 '11 at 06:10

Hussain

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answered Jul 13 '11 at 09:44

sm abbas

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Only when your parent view is a `ViewFlipper`. – Jorge Gil May 10 '13 at 21:28

setting z order of View with bringChildToFront()

3 Answers3

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