[android-developers] Re: Back Button ?what it really does?

But so when it goes back to teh original y doesnt it call onCreate()?
it almost looks like its taking an activity from cache?

On Feb 2, 1:34 pm, Dianne Hackborn <hack...@android.com> wrote:
> What it does is simple: if nothing in the view hierarchy consumes it, the
> activity in response to receiving it just calls finish() on itself.
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> On Wed, Feb 2, 2011 at 11:40 AM, kiros88 <ghui...@gmail.com> wrote:
> > Hi i was wondering what the back button really does okay so its kinda
> > confusing but here is the problem?
>
> > i have 2 tabs and another page of intent  so my app acts like a music
> > palyer basically that once u click on the song it brings u to another
> > page. but on the first tab i have a seekbar thats like volume so i
> > adjust taht click on a song then i use intent to go to another page
> > which now has a volume seek bar that also is changed based off the
> > first tab adjustment soo i tried the
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> > public static int vol
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> > then on the intent pge i adjust the volume so that i changes the value
>
> > firstTab.vol = getprogress() something like this
>
> > but when i click the back button it doesnt update on the oncreate like
> > it should
> > i know the value is changed though cuz like i said i have 2 tabs so
> > the second tab doesnt really do anythng i just go to that tab and go
> > back to the first tab and then the volume on the seekbar changes?
> > so my main questions is why isnt the back button updating the oncreate
> > i know that if u did backbutton i does changes things like when u make
> > ur own custom  arrayAdapter u can have a change on an item when u back
> > button it   but like for this example wit the seekbar its not
> > updating???
>
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> --
> Dianne Hackborn
> Android framework engineer
> hack...@android.com
>
> Note: please don't send private questions to me, as I don't have time to
> provide private support, and so won't reply to such e-mails.  All such
> questions should be posted on public forums, where I and others can see and
> answer them.

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