Programmatically set the Background color of a Drawable in Android?

Issue

I have an image in a resource file.

Drawable draw = getResources().getDrawable(R.drawable.my_icon);

The image has a transparent background.

Is there a way to programmatically set the background color to the Drawable before using the end product further in my code?

Solution

I think Drawing with PorterduffXferMode may help you in your case. This way you can merge two images (your image and a overlay completly in your color you want to replace the transparent pixels with) in many different ways.

Different porterduff modes explaned: http://www.ibm.com/developerworks/java/library/j-mer0918/

Android example: http://www.vogella.com/code/ApiDemos/src/com/example/android/apis/graphics/Xfermodes.html

This way you draw the result inside a new Bitmap. (SRC_OVER should work in your case if your image is the src and the background is used as the dst)

Answered By - yekretsaM