问似乎无法获取facebook好友的照片？

EN

public void getFacebookData(final AccessToken accessToken){
    //newMeRequest = My own data
    //myFriendsRequest = my mutual friends who have the app downloaded
    //Basically make 2 requests to one's Facebook info and return the names, links, id, and picture of the individual

    AccessToken accesstoken = AccessToken.getCurrentAccessToken();

    JSONArray friends = new JSONArray();
    GraphRequestBatch batch = new GraphRequestBatch(
            GraphRequest.newMeRequest(
                    AccessToken.getCurrentAccessToken(),
                    new GraphRequest.GraphJSONObjectCallback() {
                        @Override
                        public void onCompleted(
                                JSONObject jsonObject,
                                GraphResponse response) {
                            // Application code for user                            
                        }
                    }),
            GraphRequest.newMyFriendsRequest(
                    AccessToken.getCurrentAccessToken(),
                    new GraphRequest.GraphJSONArrayCallback() {
                        @Override
                        public void onCompleted(JSONArray jsonArray,
                                                GraphResponse response) {
                            // Application code for users friends
                            // Insert into our local DB
                            Toast.makeText(login.this, "" + response.toString(), Toast.LENGTH_SHORT).show();
                            try {
                                for (int i = 0; i < jsonArray.length(); i++) {
                                    JSONObject row = jsonArray.getJSONObject(i);
                                    System.out.println("Got id");
                                    datasource.createFriend(row.getString("name"), row.getString("id"));
                                    new GraphRequest(
                                            AccessToken.getCurrentAccessToken(),
                                            "/" + row.getString("id") + "/picture",
                                            null,
                                            HttpMethod.GET,
                                            new GraphRequest.Callback() {
                                                public void onCompleted(GraphResponse response) {
                                                    System.out.println("Got photo");
                                                }
                                            }
                                    );
                                }
                            } catch (JSONException e) {
                                throw new RuntimeException(e);
                            }
                            System.out.println("FriendsDB: " + jsonArray);
                        }
                    }
            )
    );
    batch.addCallback(new GraphRequestBatch.Callback() {
        @Override
        public void onBatchCompleted(GraphRequestBatch graphRequests) {
            // Application code for when the batch finishes
            Log.d(TAG, graphRequests.toString());

        }
    });
    batch.executeAsync();