In night-mode image background is black

[evelikov]

trafficstars

Huge shout-out for having night-mode, as well as the AMOLED on/off option.

When using night-mode and AMOLED off the image colors are inverted and it stands out, instead of seamlessly blending with the background. Can we have a variant of the ColorMatrixColorFilter so the image blends nicely?

Thanks

[tom-anders]

Tbh I copied that filter from stackoverflow, so I have no idea how to adjust it in such a way.. :D You can have a try of course, if you want?

[evelikov]

From a quick search - the materials dark is 0x171717, so something like the following should work. I don't have the Android toolchain atm, so it's completely untested.

    public ColorFilter getNegativeColorFilter() {
        # make these arrays const and/or final?
        float[] colorMatrix_amoledNegative = {
                -1.0f, 0, 0, 0, 255, //red
                0, -1.0f, 0, 0, 255, //green
                0, 0, -1.0f, 0, 255, //blue
                0, 0, 0, 1.0f, 0 //alpha
        };
        # Don't hard-code the 0.9 below...
        # getColor(... R.color.background_material_dark) - A single color value in the form 0xAARRGGBB.
        # For each RGB value, divide by 255, negate and substitute below 
        float[] colorMatrix_Negative = {
                -0.9f, 0, 0, 0, 255, //red
                0, -0.9f, 0, 0, 255, //green
                0, 0, -0.9f, 0, 255, //blue
                0, 0, 0, 1.0f, 0 //alpha
        };
        return new ColorMatrixColorFilter(amoledThemeEnabled() ? colorMatrix_amoledNegative : colorMatrix_Negative);