/**
* Set the alpha level for this drawable [0..255]. Note that this drawable also has a color in its
* paint, which has an alpha as well. These two values are automatically combined during drawing.
* Thus if the color's alpha is 75% (i.e. 192) and the drawable's alpha is 50% (i.e. 128), then
* the combined alpha that will be used during drawing will be 37.5% (i.e. 96).
*/
@Override
public void setAlpha(int alpha) {
mShapeState.mAlpha = alpha;
invalidateSelf();
}
