Retrieve profile picture using Facebook SDK 3.0 fo

问题:

I've following problem with Facebook SDK 3.0 for Android. I wanna get my (and my friends) profile picture without using their ProfilePictureView widget, so if I use Graph Explorer I see that Json response is:

{
   "data": {
         "url": "https://fbcdn-profile-a.akamaihd.net/hprofile-ak-ash4/372127_1377011138_1538716206_q.jpg", 
         "is_silhouette": false
    }
}

I need that "url" path to download and show the picture, but with the following code:

Request.executeGraphPathRequestAsync(Session.getActiveSession(), 
                                     "me/picture", 
                                      new Request.Callback() {
        @Override
        public void onCompleted(Response response) {
            GraphObject go = response.getGraphObject();
            Log.i("APP_NAME", go.toString());           
        }
});

I obtain this:

GraphObject{graphObjectClass=GraphObject, 
    state={"FACEBOOK_NON_JSON_RESULT":"����\u0000\u0010JFIF\u0000\u0001\u0001\u0000\u0000\u0001\u0000\u0001\u0000\u0000��\u0000"}}

Someone can help me please? Thanks

Cromir

回答1:

An easier way would be to execute a GET request to graph.facebook.com/USER_ID/picture so you don't have to first request an URL to the picture, and then execute another GET request to download the picture from the given URL.

Instead of using Request.executeGraphPathRequestAsync, just do a normal GET request to the URL above, e.g. http://graph.facebook.com/4/picture.

回答2:

You can retreive user information for executeMeRequest in facebook 3.0 sdk.

    public void executeMeRequest(Session session) {

        Bundle bundle = new Bundle();
        bundle.putString("fields", "picture");
        final Request request = new Request(session, "me", bundle,
                HttpMethod.GET, new Request.Callback() {

            @Override
            public void onCompleted(Response response) {
                GraphObject graphObject = response.getGraphObject();
                if(graphObject != null) {
                    try {
                        JSONObject jsonObject = graphObject.getInnerJSONObject();
                        JSONObject obj = jsonObject.getJSONObject("picture").getJSONObject("data");
                        final String url = obj.getString("url");
                            new Thread(new Runnable() {

                                @Override
                                public void run() {

                                    final Bitmap bitmap = BitmapFactory.decodeStream(HttpRequest(url);
                                    runOnUiThread(new Runnable() {

                                        @Override
                                        public void run() {
                                            imageView.setImageBitmap(bitmap);
                                        }
                                    });
                                }
                            }).start();
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            }
        });
        Request.executeBatchAsync(request);
    }

public static InputStream HttpRequest(String strUrl) {

    HttpResponse responce = null;
    try {
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpGet request = new HttpGet();
        request.setURI(new URI(strUrl));
        responce = httpClient.execute(request);
        HttpEntity entity = responce.getEntity();
        return entity.getContent();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (URISyntaxException e) {
        e.printStackTrace();
    } catch (NullPointerException e) {
        e.printStackTrace();
    }
    return null;
}

回答3:

You can get the profile picture by requesting to the Graph API. You need to pass the accessToken ,the user ID and also set the redirect false. Then the Graph API returns the JSON and from the JSON you can get url field which is the user profile.

  GraphRequest request = new GraphRequest(accessToken, "/" + userID + "/picture",null,HttpMethod.GET, new GraphRequest.Callback() {
                @Override
                public void onCompleted(GraphResponse response) {
                    Log.d("Photo Profile", response.getJSONObject().toString());
                    JSONObject jsonObject = response.getJSONObject();
                    try {

                        JSONObject data = jsonObject.getJSONObject("data");
                        String url = data.getString("url");
                        Picasso.with(getApplicationContext()).load(url).into(ivProfilePicture);
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            });
            Bundle parameters =new Bundle();
            parameters.putString("type","large");
            parameters.putBoolean("redirect",false);
            request.setParameters(parameters);
            request.executeAsync();

回答4:

You probably need to enable "Picture As Dictionary" on the advanced settings of your app in the developer console at https://developers.facebook.com/apps

回答5:

As far as I know, it's not possible to get the image directly using the facebook graph API, because their API is designed to only accept JSON responses. It seems weird that they would allow a request that results in a non-JSON response, and especially strange that they would put that request in their official documentation *(https://developers.facebook.com/docs/graph-api/reference/user/picture/).

I am using the built in Android DefaultHttpClient library.

private Bitmap downloadImage(url) {
    Bitmap image = null;
    DefaultHttpClient client = new DefaultHttpClient();
    HttpGet request = new HttpGet(imageUrl);
    try {
        HttpResponse response = client.execute(request);
        HttpEntity entity = response.getEntity();

        int imageLength = (int)(entity.getContentLength());

        InputStream is = entity.getContent();

        byte[] imageBlob = new byte[imageLength];

        int bytesRead = 0;

        // Pull the image's byte array

        while (bytesRead < imageLength) {
            int n = is.read(imageBlob, bytesRead, imageLength - bytesRead);
            bytesRead= n;
        }

        image = BitmapFactory.decodeByteArray(imageBlob, 0, imageBlob.length);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return image;
}

回答6:

I got answer... it is due to redirection. hence pass params instead of null:

Bundle params = new Bundle();
params.putBoolean("redirect", false);