RippleDrawable.java 文件源码

@Override
protected void onBoundsChange(Rect bounds) {
  if(mBackgroundDrawable != null)
    mBackgroundDrawable.setBounds(bounds);

  mBackgroundBounds.set(bounds.left + mMask.left, bounds.top + mMask.top, bounds.right - mMask.right, bounds.bottom - mMask.bottom);
  mBackground.reset();

  switch (mMask.type) {
    case Mask.TYPE_OVAL:
      mBackground.addOval(mBackgroundBounds, Direction.CW);
      break;
    case Mask.TYPE_RECTANGLE:
      mBackground.addRoundRect(mBackgroundBounds, mMask.cornerRadius, Direction.CW);
      break;
  }
}