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);
}