Manipulate alpha bytes of Java/Android color int

Question

If I have an int in Java that I\'m using as an Android color (for drawing on a Canvas), how do I manipulate just the alpha component of that int? For example, how can I use an o

Answer 1

in the android-support-v4:

int alpha = 85; //between 0-255
@ColorInt
int alphaColor = ColorUtils.setAlphaComponent(Color.Red, alpha);