Well you could register for this:

http://developer.android.com/reference/android/content/Intent.html#ACTION_SCREEN_OFF

On Fri, Nov 27, 2009 at 3:47 AM, David Given <d...@cowlark.com> wrote:

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> Is there any way where I can detect that the screen is about to turn
> off, so I can do some work *before* it happens?
>
> I need this to work around bug 3755: OpenGL apps sometimes crash when
> the screen gets turned off because they don't get
> surfaceDestroyed()/surfaceCreated() events.
>
> http://code.google.com/p/android/issues/detail?id=3755
>
> Simply put, I need to shut down OpenGL before the phone has a chance to
> detach the GPU. The only events I seems to be getting when the screen
> turns off are onPause() and onWindowFocusChanged()... both of which turn
> up *after* the GPU detaches, by which time it's too late.
>
> Can anyone suggest any way of doing this?
>
> (In desperation, I have tried to intercept the power key, but the
> power/hangup key is treated specially and doesn't generate keyboard
> events...)
>
> - --
> ┌─── dg@cowlark.com ───── http://www.cowlark.com ─────
> │
> │ "Sufficiently advanced incompetence is indistinguishable from
> │ malice." -- Vernon Schryver
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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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