Want to get data out of Parse getCallback in Android

I'm using Parse.com, and to get my wanted information, I use it's Queries.

So I use that one:

ParseUser PhotoeUser;

ParseQuery<Photo> UserQuery = ParseQuery.getQuery(Photo.class);
        UserQuery.whereEqualTo("objectId", PhotoID);
        UserQuery.getFirstInBackground(new GetCallback<Photo>() {
            @Override
            public void done(Photo pPhoto, ParseException error) {
                PhotoUser = pPhoto.getUser();
            }
        });

So what I want is simply use the PhotoUser outside of that query. But When I write:

Log.i("Profile", "PhotoUser = " + PhotoUser.get("objectId"));

PhotoUser.get("objectId") is null.

Another example is this one:

public ParseUser getUser(){
ParseQuery<Photo> UserQuery = ParseQuery.getQuery(Photo.class);
        UserQuery.whereEqualTo("objectId", PhotoID);
        UserQuery.getFirstInBackground(new GetCallback<Photo>() {
            @Override
            public void done(Photo pPhoto, ParseException error) {
                PhotoUser = pPhoto.getUser();
            }
        });

return PhotoUser;
}

Here, when I want to return the PhotoUser, it is null.

Please help me. If you need more information, just ask for it.

Just take ParseUser outside the block:

PhotoUser pUser;
ParseQuery<Photo> UserQuery = ParseQuery.getQuery(Photo.class);
    UserQuery.whereEqualTo("objectId", PhotoID);
    UserQuery.getFirstInBackground(new GetCallback<Photo>() {
        @Override
        public void done(Photo pPhoto, ParseException error) {
            pUser = pPhoto.getUser();
        }
    });

Don't forget to give variables names. I don't know how do You want to get PhotoUser when You query for Photo.