成功登录后，我试图自动路由回到菜单屏幕，但无法生成Widget构建和/或上下文。我正在使用无状态小组件进行此操作。这是我的代码。我想在最后一个打印语句之后调用路由…

Future<Null> _handleSignIn() async {
    try {
      await _googleSignIn.disconnect();
      GoogleSignInAccount googleUser = await _googleSignIn.signIn();
      GoogleSignInAuthentication googleAuth = await googleUser.authentication;

      print(googleAuth.idToken);

      await FirebaseAuth.instance.signInWithGoogle(idToken: googleAuth.idToken, accessToken: googleAuth.accessToken);


    } catch (error) {
      print(error);
    }
    print("Let's Do This");
    print(_googleSignIn.currentUser.displayName);
    print(FirebaseAuth.instance.currentUser);
  }