flutter

import 'dart:async';

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

class HomePage extends StatefulWidget {
  static String tag = 'home-page';
  @override
  _HomePageState createState() => new _HomePageState();
}

class _HomePageState extends State<HomePage> {
  List data = [];

  Future<List> getData() async {

    var response = await http.get(
      Uri.encodeFull('https://jsonplaceholder.typicode.com/users'),
      headers: {'Accept': 'application/json'},
      // body: lData,
    );
    print("object");
    // setState(() {
    // data = json.decode(response.body);
    // });

    return data;
  }

  _logout() async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    prefs.clear();
    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    // final Welcome = Text('Welcome', style: TextStyle(fontSize: 30.0));

    Widget listView(List data) {
      return ListView.builder(
          itemCount: data.length,
          itemBuilder: (context, rowNumber) {
            return ListTile(
              title: new Text(data[rowNumber]['name']),
              subtitle: new Text(
                data[rowNumber]['email'],
                style: TextStyle(fontStyle: FontStyle.normal, fontSize: 15.0),
              ),
            );
          });
    }

    return new Scaffold(
      appBar: AppBar(
        title: Text("Service List"),
        actions: <Widget>[
          new IconButton(
            icon: new Icon(Icons.exit_to_app),
            onPressed: () {
              print("logOut");
              _logout();
            },
          )
        ],
      ),
      backgroundColor: Colors.white,
      body: Center(
        child: new FutureBuilder(
          future: getData(),
          builder: (context, snapshot) {
            if (snapshot.hasData) {
              return listView(snapshot.data);
            } else if (snapshot.hasError) {
              return Text("Error: ${snapshot.error}");
            }
            return CircularProgressIndicator();
          },
        ),
      ),
      floatingActionButton: FloatingActionButton(
        tooltip: 'Add',
        child: Icon(Icons.add),
        onPressed: () {
          Navigator.of(context).pushNamed(ServiceEntry.tag);
        },
      ),
    );
  }
}