适用于Facebook的Android中的Opengraph共享

Question

I am trying to attach an image to post with facebook through opengraph share dialog.I followed everything exactly as documentation suggested in facebook developer.I get the error "Failed to generate user preview".Should I check for publish permission ?

OpenGraphObject numberFriendsObject = OpenGraphObject.Factory
                .createForPost("numberfriends");
        Log.d("username:", "object type" + numberFriendsObject.getType());
        numberFriendsObject.setProperty("title", "title");
OpenGraphAction action = GraphObject.Factory
            .create(OpenGraphAction.class);
    action.setType("learn");

    action.setProperty("numberfriends", numberFriendsObject);

    FacebookDialog shareDialog = new FacebookDialog.OpenGraphActionDialogBuilder(
            SettingsScreenActivity.this, action, "numberfriends").build();

    uiHelper.trackPendingDialogCall(shareDialog.present());

Answer 1

Do you have the permission "publish_actions" set?

EDIT:

I'm assuming you're using some sort of facebook login before this code. I utilized the facebook login button (see their docs - there's a nice tutorial):

    facebookLoginButton.setReadPermissions(Arrays.asList("publish_actions"));

Answer 2

As "game" is a custom property, the line

    openGraphAction.setProperty("game", setObj);

must be replaced by:

    openGraphAction.getData().setProperty("game", setObj);

Reference: Android open-graph .