How to send friend request using Facebook dialogs on Android?

Question

I want tot send a friend request using the Facebook Android SDK. I\'m currently using this code (which I got from here):

Bundle parameters = new Bundle();
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Answer 1

You can use:

WebDialog.RequestsDialogBuilder requestBuilder = (new WebDialog.RequestsDialogBuilder(this,
                Session.getActiveSession(), params)).setOnCompleteListener(
                new OnCompleteListener() {

                    @Override
                    public void onComplete(Bundle values,
                            FacebookException error) {
                        if (error != null) {

                        } else {
                            final String requestId = values
                                    .getString("request");
                            if (requestId != null) {
                                //if the user completed the action,
                            } else {

                            }
                        }
                    }

                });
        WebDialog requests = requestBuilder.build();
        requests.show();

If you want to set the request to preselected friends just add the following to the requestBuilder:

requestBuilder.setTo("FRIEND_ID, ANOTHER_FRIEND_ID"), before building the dialog.

What is strange is that it accepts the list of friends as a concatenated list of ids, not an Array nor list. I didn't find in in the docs, but just found that it works