sprockets/src/main/java/net/sf/sprockets/view/Reveals.java
public static Animator circleToRect(View circle, View rect) {
        return circleRect(circle, rect, true);
    }
public static Animator circleToRect(View circle, View rect) {
        return circleRect(circle, rect, true);
    }
Get an Animator that reveals the rectangular View from the circular View.

@param circle to start reveal from
@param rect   to reveal, probably should already be {@link View#INVISIBLE invisible}