Android 開發 (四十四) facebook v2.0(3.14SDK) invitable_friends

在facebook 2.0 版本，要送遊戲邀請給朋友，目前只能使用 invitable_friends 的API，
使用方法如下

/* make the API call */
new Request(
    session,
    "/me/invitable_friends",
    null,
    HttpMethod.GET,
    new Request.Callback() {
        public void onCompleted(Response response) {
            /* handle the result */
        }
    }
).executeAsync();

接著將會回傳如下的資料

 {
      "id": "AVlzYTkXshfBqLe58zR9tY5dZ7L0wltTUkWKT0Z5V87zkwv-39...", 
      "name": "Guy Cross", 
      "picture": {
        "data": {
          "is_silhouette": false, 
          "url": "https://fbcdn-profile-a.akamaihd.net/hprofile-ak-prn1/t5.0-1/623782_622770420_2109148508_q.jpg" 
        }
      }
    }

可以發現，我們再也無法取得使用者真實的fbId，相對的我們只能取得 friend Token，
接著就可以使用Request Dialog 發送訊息，然後在to 的param中填入  friend Token即可

Bundle params = new Bundle();

params.putString("message", "Take this bomb to blast your way to victory!");

// Optionally provide a 'to' param to direct the request at a specific user
params.putString("to", "RECIPIENT_USER_ID");

// Give the structured request information
params.putString("action_type", "send");
params.putString("object_id", "YOUR_OBJECT_ID");  

WebDialog requestsDialog = (
        new WebDialog.RequestsDialogBuilder(getActivity(),
            Session.getActiveSession(),
            params))
            .build();
    requestsDialog.show();

在發送成功之後可以得到一組

Parameter	Description
request	The request object ID. To get the full request ID, concatenate this with a user ID from the to field: <request_object_id>_<user_id>
to	An array of the recipient user IDs for the request that was created.

接著將 requestId and UserId 組起來，就可以得到完整的資料

http://graph.facebook.com/<REQUEST_OBJECT_ID>_<USER_ID>?access_token=APP_ACCESS_TOKEN

在這邊可以得到朋友 app scope Id。

{
  "id": "REQUEST_OBJECT_ID", 
  "application": {
    "name": "APP_DISPLAY_NAME", 
    "namespace": "APP_NAMESPACE", 
    "id": "APP_ID"
  }, 
  "to": {
    "name": "RECIPIENT_FULL_NAME", 
    "id": "RECIPIENT_USER_ID"
  }, 
  "from": {
    "name": "SENDER_FULL_NAME", 
    "id": "SENDER_USER_ID"
  }, 
  "message": "ATTACHED_MESSAGE", 
  "created_time": "2014-01-17T16:39:00+0000"
}

目前好像還找不到較好的方法取得friends list ， 或許過陣子facebook會提供相關的api