Default gradient radius to %p when no intrinsic width or height set

                    float radius = st.mGradientRadius;

                    if (st.mGradientRadiusType == RADIUS_TYPE_FRACTION) {

                        radius *= Math.min(st.mWidth, st.mHeight);

                        // Fall back to parent width or height if intrinsic

                        // size is not specified.

                        final float width = st.mWidth >= 0 ? st.mWidth : r.width();

                        final float height = st.mHeight >= 0 ? st.mHeight : r.height();

                        radius *= Math.min(width, height);

                    } else if (st.mGradientRadiusType == RADIUS_TYPE_FRACTION_PARENT) {

                        radius *= Math.min(r.width(), r.height());

                    }

                    mGradientRadius = radius;

                    if (radius == 0) {

                        // We can't have a shader with zero radius, so let's

                        // have a very, very small radius.

                    if (radius <= 0) {

                        // We can't have a shader with non-positive radius, so

                        // let's have a very, very small radius.

                        radius = 0.001f;

                    }