ShadowLayout.java 文件源码

/**
 * Called by the constructors - sets up the drawing parameters for the drop shadow.
 */
private void init() {
    mShadowPaint.setColor(Color.BLACK);
    mShadowPaint.setStyle(Style.FILL);
    setWillNotDraw(false);
    mShadowBitmap = Bitmap.createBitmap(sShadowRect.width(),
            sShadowRect.height(), Bitmap.Config.ARGB_8888);
    Canvas c = new Canvas(mShadowBitmap);
    mShadowPaint.setMaskFilter(new BlurMaskFilter(BLUR_RADIUS, Blur.NORMAL));
    c.translate(BLUR_RADIUS, BLUR_RADIUS);
    c.drawRoundRect(sShadowRectF, sShadowRectF.width() / 40,
            sShadowRectF.height() / 40, mShadowPaint);
}