CODEWITHSUNDEEP
androidjsonfacebook-graph-apipagination
issa.ayoub.dev
issa.ayoub.dev

Reputation: 786

GraphRequest is null after getRequestForPagedResults method

I am building an application that fetches the images of a facebook user. I have parsed the returned JSONObject, extracted the URL of the images and load them into a GridView.

The Problem is that the JSONObject have link to second pages to fetch the remaining images's.

Here is my code: 

final GraphRequest.Callback graphCallback = new GraphRequest.Callback(){
        @Override
        public void onCompleted(GraphResponse response) {
            jsonObject = response.getJSONObject();
            GraphRequest newRequest = response.getRequestForPagedResults(GraphResponse.PagingDirection.NEXT);
            JSONObject object = request.getGraphObject();
        }
    };

Bundle parameters = new Bundle();
parameters.putString("fields", "images");
parameters.putString("limit", "50");
Bundle tagged = new Bundle();
tagged.putString("type", "tagged");

final GraphRequest request = new GraphRequest( AccessToken.getCurrentAccessToken(), "/" + profile.getId() + "/photos", tagged,
 HttpMethod.GET, graphCallback
);
request.setParameters(parameters);
request.executeAsync();

Here is the value of the newRequest:

{Request: accessToken: {AccessToken token:ACCESS_TOKEN_REMOVED permissions:> [user_friends, user_photos, public_profile]}, graphPath: null, graphObject: null, httpMethod: GET, parameters: Bundle[{}]}

And the value of the JSONObject "object" is :

null

how to implement pagination using FacebookSDK

Thanks for helping!!

Upvotes: 0

Views: 562

Answers (1)

issa.ayoub.dev
issa.ayoub.dev

Reputation: 786

Now i found the solution. First of all the newRequest object is not null. When I debug the code, I looked for the difference between the newRequest (GraphRequest) and the request (GraphRequest).

There are 2 things missing:

  1. I should the method callBack should be declared.
  2. The GraphPath should not be null as shown above.
  3. The Bundle parameters are an issue, but i need it to extract the URL of the images.

Therefore, my code becomes as follows:

final GraphRequest.Callback graphCallback = new GraphRequest.Callback(){
        @Override
        public void onCompleted(GraphResponse response) {
                Bundle parameters = new Bundle();
                parameters.putString("fields", "images");
                parameters.putString("limit", "50");
                jsonObject = response.getJSONObject();
                GraphRequest newRequest =      response.getRequestForPagedResults(GraphResponse.PagingDirection.NEXT);
                newRequest.setGraphPath("/" + profile.getId() + "/photos");
                newRequest.setCallback(this);
                newRequest.setParameters(parameters);
                newRequest.executeAsync();
        }
    };

This is how Pagination is implemented with facebookSDK

Upvotes: 1

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