android连接facebook上传图片到公共主页的问题

我这里有个例子是上传到个人主页的，我想上传到公共主页要怎么弄？  .setNegativeButton(R.string.remote_button,
                                    new DialogInterface.OnClickListener() {
                                        @Override
                                        public void onClick(DialogInterface dialog, int which) {
                                            /*
                                             * Source tag: upload_photo_tag
                                             */
                                            Bundle params = new Bundle();
                                            params.putString("url",
                                                    "http://www.facebook.com/images/devsite/iphone_connect_btn.jpg");
                                            params.putString("caption",
                                                    "FbAPIs Sample App photo upload");
                                          //id  148778808589468
                                            String access_token = Utility.mFacebook.getAccessToken();
                                          
                                            Utility.mAsyncRunner.request("me/photos", params,
                                                    "POST", new PhotoUploadListener(), null);
                                        }
我已经可以发表评论到公共主页了，但是我用同样的方法上传图片却不行
这是发表评论的例子 Bundle params = new Bundle();
                params.putString("caption", getString(R.string.app_name));
                params.putString("description", getString(R.string.app_desc));
                params.putString("picture", Utility.HACK_ICON_URL);
                params.putString("name", getString(R.string.app_action));
                params.putString("to","公共主页ID");   //我只要加入这行就可以发表到公共主页了，同样的方法上传图片静不可以                Utility.mFacebook.dialog(Hackbook.this, "feed", params, new UpdateStatusListener());
                String access_token = Utility.mFacebook.getAccessToken();
                System.out.println(access_token);
                break;