Banding on ICS Holo Theme

Question

I'm seeing banding on my activities using the Holo theme on my Samsung Galaxy Nexus, Android version 4.0.2.

Below is a screenshot of my PreferenceActivity, taken from the Nexus using DDMS, which illustrates the issue.

I have tried adding (to no avail):

getWindow().setFormat(PixelFormat.RGBA_8888);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_DITHER);

What causes this and is there a work around?

Answer 1

This worked for me:

@Override
    public void onAttachedToWindow() {

            getWindow().setFormat(PixelFormat.RGBA_8888);
}

Answer 2

Dither itself is an imperfect solution to the problem, check to see that:

1. Make sure the Bitmap is loaded with the following settings BitmapFactory.Options.inPreferredConfig=Bitmap.Config.RGBA_8888 and BitmapFactory.Options.inDither=false

2. The background image is not stretched

Reference