Android Facebook 4.0版开放图发布位图失败

I have the code below attempting to post an Open Graph story with attached bitmap image. The Bitmap is about 1 Meg in size so is within the Facebook limitation. The Share Dialog is displayed and the post will work but with no image showing! I do have appropriate provider entry in the manifest and I get no reported errors. Any thoughts on what may be wrong?I have the code below attempting to post an Ope