How to navigate to a screen inside FutureBuilder

I want to navigate into new screen if snapshot.hasData but i dont know how to do that

This is my code :

@override
  Widget build(BuildContext context) {
    return Column(
      children: <Widget>[
        FutureBuilder<String>(
          future: getPosts(),
          builder: (context, snapshot) {
            if (snapshot.hasError) {
              return Text(
                'There was an error :(',
              );
            } else if (snapshot.hasData) {
              return Text('data');
            } else {
              return AlertDialog(
                title: Text('Title'),
                content: SingleChildScrollView(
                  child: Text('data'),
                ),
              );
            }
          },
        ),
      ],
    );
  }

If someone can give me a better way to solve this question it would be great :)