Can I use multiple method on a future builder?

You can use Future.wait(Future[]) to return a list of futures.

Future<String> foo;
Future<int> bar;
FutureBuilder(
  future: Future.wait([bar, foo]),
  builder: (context, AsyncSnapshot<List<dynamic>> snapshot) {
    snapshot.data[0]; //bar
    snapshot.data[1]; //foo
  },
);