MenuDrawer.java 文件源码

protected GradientDrawable.Orientation getDropShadowOrientation() {
    // Gets the orientation for the static and sliding drawer. The overlay drawer provides its own implementation.
    switch (getPosition()) {
        case TOP:
            return GradientDrawable.Orientation.BOTTOM_TOP;

        case RIGHT:
            return GradientDrawable.Orientation.LEFT_RIGHT;

        case BOTTOM:
            return GradientDrawable.Orientation.TOP_BOTTOM;

        default:
            return GradientDrawable.Orientation.RIGHT_LEFT;
    }
}