If I will use the approach of brightness change present in android
sources with IHardware interface, what do you think, will it possibly
improve brightness transition?
On 15 Лип, 20:11, Dianne Hackborn <hack...@android.com> wrote:
> 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 <lyubomyr.du...@gmail.com> 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
> 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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