Facebook server returns null data on query. Queryi

问题:

I'm trying to fetch the photos from particular album on facebook. Trying below URL gives me perfect data when querying at Graph API Explorer. But it returns null in my application code.

Also when I tried on browser it returns me:

{
 "data": { 
    ]
 }

which basically null:

URL = "https://graph.facebook.com/3386086936429/photos?limit=10";

try {
HttpClient hc = new DefaultHttpClient();
HttpGet get = new HttpGet(URL);
HttpResponse rp = hc.execute(get);

String st=rp.toString();

Log.e("RESPONSE", st);
Log.e("ACCESS_TOKEN",at);

if (rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
       String queryAlbums = EntityUtils.toString(rp.getEntity());

       int s=rp.getStatusLine().getStatusCode();
       String a=String.valueOf(s);
       Log.e("RESPONSE-IF", a);

       JSONObject JOTemp = new JSONObject(queryAlbums);

       JSONArray JAPhotos = JOTemp.getJSONArray("data");

      Log.e("JSONArray", String.valueOf(JAPhotos));
      Log.e("JSONArray-Length",String.valueOf(JAPhotos.length()));

Log:

02-14 00:12:34.280: E/RESPONSE(1320)org.apache.http.message.BasicHttpResponse@40518ac8
02-14 00:12:34.301: E/RESPONSE-IF(1320): 200
02-14 00:12:34.310: E/JSONArray(1320): []
02-14 00:12:34.310: E/JSONArray-Length(1320): 0

Where am I going wrong while querying?

回答1:

When I try to visit your ID on Facebook or query it via the Graph API, I get a "Unsupported get request" error. That tells me that either you've got the wrong id, or this id has restrictions on who can view it.

If you are able to view this information, then you can only get this information if you have an access token from a user who meets that object's restrictions.