Github Flutter App 2

import 'dart:async';
import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;

void main() {
  runApp(new MaterialApp(
    home: new RepoListPage(),
    routes: <String, WidgetBuilder>{
      '/screen1': (BuildContext context) => new RepoListPage(),
      '/screen2': (BuildContext context) => new Screen2()
    },
  ));
}

class RepoListPage extends StatefulWidget {
  @override
  RepoListPageState createState() => new RepoListPageState();
}

class RepoListPageState extends State<RepoListPage> {
  List data;

  Future<String> getData() async {
    var response = await http.get(
        Uri.encodeFull(
            "https://api.github.com/search/repositories?q=language:Java&sort=stars"),
        headers: {"Accept": "application/json"});

    this.setState(() {
      data = JSON.decode(response.body)["items"];
    });
    print(data[1]["name"]);

    return "Success!";
  }

  @override
  void initState() {
    this.getData();
  }

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Listviews"),
      ),
      body: new ListView.builder(
        itemCount: data == null ? 0 : data.length,
        itemBuilder: (BuildContext context, int index) {
          return createListItem(data[index]);
        },
      ),
    );
  }

  Widget createListItem(data) => new GestureDetector(
      onTap: () {
        button1(context);
      },
      child: new Container(
        padding: const EdgeInsets.all(32.0),
        child: new Row(
          children: [
            new Expanded(
              child: new Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  new Container(
                    padding: const EdgeInsets.only(bottom: 8.0),
                    child: new Text(
                      data["name"],
                      style: new TextStyle(
                        fontWeight: FontWeight.bold,
                      ),
                    ),
                  ),
                  new Text(
                    data["description"],
                    style: new TextStyle(
                      color: Colors.grey[500],
                    ),
                  ),
                  new Row(
                    children: <Widget>[
                      new Icon(
                        Icons.content_copy,
                        color: Colors.red[500],
                      ),
                      new Text('${data["forks_count"]}'),
                      new Icon(
                        Icons.star,
                        color: Colors.red[500],
                      ),
                      new Text('${data["stargazers_count"]}'),
                    ],
                  )
                ],
              ),
            ),
            // new Image.network(data["owner"]["avatar_url"]),
          ],
        ),
      ));
}

class Screen2 extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Screen 2"),
      ),
      body: new Center(
        child: new Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: <Widget>[
            new RaisedButton(
              onPressed: () {
                button2(context);
              },
              child: new Text("Back to Screen 1"),
            )
          ],
        ),
      ),
    );
  }
}

void button1(BuildContext context) {
  print("Button 1");
  Navigator.of(context).pushNamed('/screen2');
}

void button2(BuildContext context) {
  print("Button 2");
  Navigator.of(context).pop(true);
}