Future is not recognized in Flutter (Dart)

Question

I’m studying Flutter and recently I’ve had a rather boring problem. I was using Future for my asynchronous programming and I did all the code, just like the example I was seeing. However, I realized that Future was not being recognized, and there was a recommendation for me to do the import package async. I did it, but still the problem did not solve.

Future<int> insertAgendamento(Agendamento agendamento) async {
    Database db = await this.database;

    var resultado = await db.insert(agendaTable, agendamento.toMap());

    return resultado;
}

Turns out I’ve already done the import and put a dependency on pubspec.yaml.

import 'dart:async';

When I hover over my "Future" the following message appears:

Future isn’t a type. Try correcting the name to match an existing type.

And in that import, The warning appears that I am not using it... Maybe it is something silly, that for lack of attention, I could not find. But I’d like your help.

Answer 1

I managed to solve the problem, what I needed to do was set up my import to be called by Fut: import 'dart:async' as Fut;

Soon after, I went to my code and put:

Fut.Future<int> insertAgendamento(Agendamento agendamento) async {
Database db = await this.database;

var resultado = await db.insert(agendaTable, agendamento.toMap());

return resultado;}

After that, my problem was solved.

I found this alternative in this discussion on github, whose solution was presented by the yringler user.