How to prevent Android's drawBitmap from only drawing black images?

Question

As per the original question, The end result is a rounded-rect png in an ImageView with a natural looking drop shadow.

I have the shadow wo

Answer 1

You have to draw both the shadow image and the original image. The shadow image only contains the alpha values of the original image, not the actual colored pixels.

Answer 2

I commented in your last question, but here it is again.

The problem might be that you're drawing a 32-bit image (the original) onto an 8-bit image (the extracted shadowImage). If that's the case, do something like

Bitmap shadowImage32 = shadowImage.copy(ARGB_8888, true);

after the extractAlpha call, and draw onto that guy instead of the 8-bit shadowImage.