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;
    }
}