[android-developers] Re: Gradient banding on high DPI devices

It seems to be an issue with 2.0

If I draw a dithered gradient on a 1.6 emulator it looks fine, but if
I use the same code to draw it on a 2.0 emulator it has banding.

On Nov 2, 7:19 pm, Christopher <ch...@orr.me.uk> wrote:
> Hi all,
>
> I've been looking at some issues with the background of our
> application, particularly on high-density devices (240 dpi, 480x854).
>
> I managed to eliminate banding on existing devices (i.e. G1/G2, 160
> dpi) by applying the android:dither="true" attribute to our nine-patch
> image, which is a 1x480px PNG with no noise added.  Looks great.
>
> However, if I use the same image on a higher resolution device, the
> banding is pretty nasty looking.  Same happens regardless of whether I
> use a shape+gradient, a noisy nine-patch PNG, or an android:dithered
> nine-patch PNG -- even if I create an 854px-tall image.
>
> Is the use of gradients going to become a problem on high screen
> density devices, purely because of the display colour depth, or is
> there any way to solve this?
>
> Thanks,
> Chris

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