- "uploaded_at" parameters does not exist. I replaced it with "updated_at"
- The date format was not correct.
Bug remaining :
- The get method for getItems with "HttpParams params = new BasicHttpParams();" does not work. Here is my solution : http://cl.ly/1i1a0y040w3y0Q3V0i0x
- There is a new parameter called "thumbnail_url" (getItems). You should implement it