Your colorValue
is always 0!
Replace argb(AlphaValue, RedValue, GreenValue, BlueValue);
by colorValue = argb(AlphaValue, RedValue, GreenValue, BlueValue);
EDIT:
I just realized now: you argb
method does nothing! You don't make proper use of any parameter!
Replace it by:
public int argb (int alpha, int red, int green, int blue) {
return Color.argb(alpha, red, green, blue);
}