WheelView.java 文件源码

/**
 * Initializes resources
 */
private void initResourcesIfNecessary() {

    if (topShadow == null) {
        topShadow = new GradientDrawable(Orientation.TOP_BOTTOM,
                SHADOWS_COLORS);
    }

    if (topBlurShadow == null) {
        topBlurShadow = new GradientDrawable(Orientation.TOP_BOTTOM,
                BLUR_SHADOWS_COLORS);
    }

    if (bottomBlurShadow == null) {
        bottomBlurShadow = new GradientDrawable(Orientation.BOTTOM_TOP,
                BLUR_SHADOWS_COLORS);
    }

    if (bottomShadow == null) {
        bottomShadow = new GradientDrawable(Orientation.BOTTOM_TOP,
                SHADOWS_COLORS);
    }

}