ShadowParentView.java 文件源码

private void drawShadow(Canvas canvas) {
    if (shadowDrawable != null) {

        Rect newRect = canvas.getClipBounds();
        Log.d(TAG,"ShadowParentView has blur! " + newRect);
        newRect.inset(-shadowPadding, -shadowPadding);
        canvas.clipRect (newRect, Region.Op.REPLACE);

        shadowDrawable.draw(canvas);
    }
}