If you just change the brightness directly to what you want, the window manager will do a smooth ramp from the current to your new brightness (as much as it can with the hardware, many devices don't have a lot of possible screen brightness levels).
On Wed, Jul 15, 2009 at 6:00 AM, LD <[email protected]> wrote: > > Hi, > > I am trying to resolve following task: smooth change of brightness > from 100% to 0%, but can't gain effect of smoothness. > > Want to emphasize that I am using following approach of brightness > change. The recommended one. > > WindowManager.LayoutParams lp = window.getAttributes(); > lp.screenBrightness = floatPercent; // 0 - 1 > window.setAttributes(lp); > > Well, it obviously works, but not smooth. > I will describe logic: > > I have a thread that changes brightness: > > while (isRunning()) { > Thread.sleep(sleepTime); > spentTime+=sleepTime; > view.post(new Runnable() { > public void run() { > changeBrightness(); > } > }); > } > > We have duration of brightness change, for example 10 seconds. > I calculate next value of floatPercent (see code snippet above) the > way, sleepTime should always be less than 50ms. > So looks like it had to be smooth. > > But I always get not smooth transition. It relates specially the range > of 0% - 5% of brightness. Smoothness is completely lost on this > brightness range. > What can you propose? > > Thanks, > Lyubomyr > > > > > -- Dianne Hackborn Android framework engineer [email protected] 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. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
