EDIT: Anwser at the end of this post.
I am trying to get a Facebook user\'s profile picture thanks to the inbuilt Facebook SDK\'s function Request()
Try this :
ImageView user_picture;
userpicture=(ImageView)findViewById(R.id.userpicture);
URL img_value = null;
img_value = new URL("http://graph.facebook.com/"+id+"/picture?type=large");
Bitmap mIcon1 = BitmapFactory.decodeStream(img_value.openConnection().getInputStream());
userpicture.setImageBitmap(mIcon1);
Where ID is one your profile ID.
For Further details check this :
https://developers.facebook.com/docs/graph-api