Thursday 6 December 2018

Flutter Infinite ListView using Webservice


In this tutorial, we will see how to implement Infinite ListView in Flutter using webservice.



Here is the reference link i used most of the code but i used webservice in this tutorial.

Thanks to author of the tutorial
https://marcinszalek.pl/flutter/infinite-dynamic-listview/


Now Let see using this webservice
https://api.randomuser.me/?page=1&results=20&seed=abc

Here page number increments after scroll reaches the end.

Demo:
=======


main.dart
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import 'package:akeepo/randomuser_infinitelist.dart';
import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {


  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,

      ),
      home: InfiniteUsersList(),

   

    );
  }
}


randomuser_infinitelist.dart
=============================

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

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

class InfiniteUsersList extends StatefulWidget {
  static String tag = 'users-page';

  @override
  State<StatefulWidget> createState() {
    return new _InfiniteUsersListState();
  }
}

class _InfiniteUsersListState extends State<InfiniteUsersList> {
  List<User> users = new List<User>();
  ScrollController _scrollController = new ScrollController();
  bool isPerformingRequest = false;
  int pageNumber = 0;

  @override
  void initState() {
    super.initState();

    // Loading initial data or first request to get the data
    _getMoreData();

    // Loading data after scroll reaches end of the list
    _scrollController.addListener(() {
      if (_scrollController.position.pixels ==
          _scrollController.position.maxScrollExtent) {
        _getMoreData();
      }
    });
  }

  // to show progressbar while loading data in background
  Widget _buildProgressIndicator() {
    return new Padding(
      padding: const EdgeInsets.all(8.0),
      child: new Center(
        child: new Opacity(
          opacity: isPerformingRequest ? 1.0 : 0.0,
          child: new CircularProgressIndicator(),
        ),
      ),
    );
  }

  @override
  void dispose() {
    _scrollController.dispose();
    super.dispose();
  }

  // Webservice request to load 20 users data using paging
  Future<List<User>> _getUsers() async {
    List<User> users = new List<User>();
    setState(() {
      pageNumber++;
    });

    String url =
        "https://api.randomuser.me/?page=$pageNumber&results=20&seed=abc";
    print(url);

    var response = await http.get(url);
    var jsonData = json.decode(response.body);

    print(jsonData);

    var usersData = jsonData["results"];
    for (var user in usersData) {
      User newUser = User(user["name"]["first"] + user["name"]["last"],
          user["email"], user["picture"]["large"], user["phone"]);
      users.add(newUser);
    }

    return users;
  }

  _getMoreData() async {
    if (!isPerformingRequest) {
      setState(() {
        isPerformingRequest = true;
      });
      List<User> newEntries = await _getUsers(); //returns empty list
      if (newEntries.isEmpty) {
        double edge = 50.0;
        double offsetFromBottom = _scrollController.position.maxScrollExtent -
            _scrollController.position.pixels;
        if (offsetFromBottom < edge) {
          _scrollController.animateTo(
              _scrollController.offset - (edge - offsetFromBottom),
              duration: new Duration(milliseconds: 500),
              curve: Curves.easeOut);
        }
      }
      setState(() {
        users.addAll(newEntries);
        isPerformingRequest = false;
      });
    }
  }

  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
          title: Text('Users',
              style:
                  TextStyle(color: Colors.white, fontWeight: FontWeight.bold))),
      body: Container(
          child: ListView.builder(
              shrinkWrap: true,
              controller: _scrollController,
              itemCount: users.length + 1,
              itemBuilder: (BuildContext context, int index) {
                if (index == users.length) {
                  return _buildProgressIndicator();
                } else {
                  return ListTile(
                    onTap: () {
                      Navigator.push(
                          context,
                          new MaterialPageRoute(
                              builder: (context) =>
                                  UserDetailPage(users[index])));
                    },
                    title: Text(users[index].fullName),
                    subtitle: Text(users[index].mobileNumber),
                    leading: CircleAvatar(
                        backgroundImage: NetworkImage(users[index].imageUrl)),
                  );
                }
              })),
    );
  }
}

class User {
  final String fullName;

  final String email;

  final String imageUrl;

  final String mobileNumber;

  User(this.fullName, this.email, this.imageUrl, this.mobileNumber);
}

// User Detail Page

class UserDetailPage extends StatelessWidget {
  final User user;

  UserDetailPage(this.user);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("User Details"),
      ),
      body: Center(
        child: Text(
          user.fullName,
          style: TextStyle(fontSize: 35.0),
        ),
      ),
    );
  }
}



Monday 17 September 2018

Git Commands

Download git
https://git-scm.com/

if you want to add your project to bitbucket or github. you can use the following commands

Step 1:

Right Click-> Git Bash Here or go to the Project folder if you are not using git GUI tools

Step 2:
Type git init (For initializing git).

Step 3:
Type git add -A (Get all files in the staging area).

Step 4:
Type git commit -m "First Commit"(Commit Changes)

Step 5:
Type git remote add origin https://..bitbucket.org/../ABC.git (Your repo URL)

Step 6:
Type git push -f origin master(your branch name)

Tuesday 28 August 2018

Flutter Navigation Drawer Example





















main.dart
=========


import 'package:flutter/material.dart';
import 'package:akeepo/navdrawer.dart';
void main() => runApp(MyApp());

class MyApp extends StatelessWidget {


  @override  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,

      ),
      home: NavDrawer(),

    );
  }
}







navdrawer.dart
================


import 'package:flutter/material.dart';

class NavDrawer extends StatefulWidget {
  @override  _NavDrawerState createState() => _NavDrawerState();
}

class _NavDrawerState extends State<NavDrawer> {
  @override  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Nav Drawer")),
      drawer: new Drawer(
        child: new ListView(
          children: <Widget>[
            new UserAccountsDrawerHeader(
              accountName: new Text("Pratap Kumar"),
              accountEmail: new Text("kprathap23@gmail.com"),
              decoration: new BoxDecoration(
                image: new DecorationImage(
                  image: new ExactAssetImage('assets/images/lake.jpeg'),
                  fit: BoxFit.cover,
                ),
              ),
              currentAccountPicture: CircleAvatar(
                  backgroundImage: NetworkImage(
                      "https://randomuser.me/api/portraits/men/46.jpg")),
            ),
            new ListTile(
                leading: Icon(Icons.library_music),
                title: new Text("Music"),
                onTap: () {
                  Navigator.pop(context);
                }),
            new ListTile(
                leading: Icon(Icons.movie),
                title: new Text("Movies"),
                onTap: () {
                  Navigator.pop(context);
                }),
            new ListTile(
                leading: Icon(Icons.shopping_cart),
                title: new Text("Shopping"),
                onTap: () {
                  Navigator.pop(context);
                }),
            new ListTile(
                leading: Icon(Icons.apps),
                title: new Text("Apps"),
                onTap: () {
                  Navigator.pop(context);
                }),
            new ListTile(
                leading: Icon(Icons.dashboard),
                title: new Text("Docs"),
                onTap: () {
                  Navigator.pop(context);
                }),
            new ListTile(
                leading: Icon(Icons.settings),
                title: new Text("Settings"),
                onTap: () {
                  Navigator.pop(context);
                }),
            new Divider(),
            new ListTile(
                leading: Icon(Icons.info),
                title: new Text("About"),
                onTap: () {
                  Navigator.pop(context);
                }),
            new ListTile(
                leading: Icon(Icons.power_settings_new),
                title: new Text("Logout"),
                onTap: () {
                  Navigator.pop(context);
                }),
          ],
        ),
      ),
    );
  }
}






Flutter BottomNavigation Example







main.dart
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import 'package:flutter/material.dart';

import 'package:akeepo/bottomnavigation.dart';
void main() => runApp(MyApp());

class MyApp extends StatelessWidget {


  @override  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,

      ),
      home: BottomNavigation(),

    );
  }
}



bottomnavigation.dart

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import 'package:flutter/material.dart';

class BottomNavigation extends StatefulWidget {
  @override  _BottomNavigation createState() => new _BottomNavigation();
}

// SingleTickerProviderStateMixin is used for animation

class _BottomNavigation extends State<BottomNavigation>
    with SingleTickerProviderStateMixin {
  int _currentIndex = 0;

  void onTabTapped(int index) {
    setState(() {
      _currentIndex = index;
    });
  }

  final List<Widget> _children = [
    new DialledCallsPage(),
    new MissedCallsPage(),
    new ReceivedCallsPage()
  ];

  @override  Widget build(BuildContext context) {
    return new Scaffold(
        // Appbar        appBar: new AppBar(
          // Title          title: new Text("Bottom Navigation"),
          // Set the background color of the App Bar          backgroundColor: Colors.blue,
        ),
        body: _children[_currentIndex],

        // Set the bottom navigation bar        
bottomNavigationBar: BottomNavigationBar(
            onTap: onTabTapped,
            currentIndex: _currentIndex,
            items: [
              BottomNavigationBarItem(
                  icon: new Icon(Icons.call_made),
                  title: new Text('All Calls')),
              BottomNavigationBarItem(
                  icon: new Icon(Icons.call_missed), title: new Text('Missed')),
              BottomNavigationBarItem(
                  icon: new Icon(Icons.call_received),
                  title: new Text('Received')),
            ]));
  }
}

List<Contact> missedCallContacts = [
  Contact(fullName: 'Pratap Kumar', email: 'pratap@example.com'),
  Contact(fullName: 'Jagadeesh', email: 'Jagadeesh@example.com'),
  Contact(fullName: 'Srinivas', email: 'Srinivas@example.com'),
  Contact(fullName: 'Narendra', email: 'Narendra@example.com'),
  Contact(fullName: 'Sravan ', email: 'Sravan@example.com'),
  Contact(fullName: 'Ranganadh', email: 'Ranganadh@example.com'),
  Contact(fullName: 'Karthik', email: 'Karthik@example.com'),
  Contact(fullName: 'Saranya', email: 'Saranya@example.com'),
  Contact(fullName: 'Mahesh', email: 'Mahesh@example.com'),
];

List<Contact> receivedCallContacts = [
  Contact(fullName: 'Pratap Kumar', email: 'pratap@example.com'),
  Contact(fullName: 'Jagadeesh', email: 'Jagadeesh@example.com'),
  Contact(fullName: 'Srinivas', email: 'Srinivas@example.com'),
];

List<Contact> dialledCallContacts = [
  Contact(fullName: 'Ranganadh', email: 'Ranganadh@example.com'),
  Contact(fullName: 'Karthik', email: 'Karthik@example.com'),
  Contact(fullName: 'Saranya', email: 'Saranya@example.com'),
  Contact(fullName: 'Mahesh', email: 'Mahesh@example.com'),
];

class MissedCallsPage extends StatefulWidget {
  @override  State<StatefulWidget> createState() {
    return new _MissedCallsPage();
  }
}

class _MissedCallsPage extends State<MissedCallsPage> {
  @override  Widget build(BuildContext context) {
    return Scaffold(
        body: new Column(
      children: <Widget>[
        new Expanded(
          child: new ListView.builder(
            itemCount: missedCallContacts.length,
            itemBuilder: (context, index) {
              return ListTile(
                title: Text(
                  '${missedCallContacts[index].fullName}',
                ),
                subtitle: Text('${missedCallContacts[index].email}'),
                leading: new CircleAvatar(
                    backgroundColor: Colors.blue,
                    child: Text('${missedCallContacts[index].fullName.substring(
                                0, 1)}')),
                onTap: () => _onTapItem(context, missedCallContacts[index]),
              );
            },
          ),
        ),
      ],
    ));
  }

  void _onTapItem(BuildContext context, Contact post) {
    Scaffold.of(context).showSnackBar(
        new SnackBar(content: new Text("Tap on " + ' - ' + post.fullName)));
  }
}

class ReceivedCallsPage extends StatefulWidget {
  @override  State<StatefulWidget> createState() {
    return new _ReceivedCallsPage();
  }
}

class _ReceivedCallsPage extends State<ReceivedCallsPage> {
  @override  Widget build(BuildContext context) {
    return Scaffold(
        body: new Column(
      children: <Widget>[
        new Expanded(
          child: new ListView.builder(
            itemCount: receivedCallContacts.length,
            itemBuilder: (context, index) {
              return ListTile(
                title: Text(
                  '${receivedCallContacts[index].fullName}',
                ),
                subtitle: Text('${receivedCallContacts[index].email}'),
                leading: new CircleAvatar(
                    backgroundColor: Colors.blue,
                    child:
                        Text('${receivedCallContacts[index].fullName.substring(
                            0, 1)}')),
                onTap: () => _onTapItem(context, receivedCallContacts[index]),
              );
            },
          ),
        ),
      ],
    ));
  }

  void _onTapItem(BuildContext context, Contact post) {
    Scaffold.of(context).showSnackBar(
        new SnackBar(content: new Text("Tap on " + ' - ' + post.fullName)));
  }
}

class DialledCallsPage extends StatefulWidget {
  @override  State<StatefulWidget> createState() {
    return new _DialledCallsPage();
  }
}

class _DialledCallsPage extends State<DialledCallsPage> {
  @override  Widget build(BuildContext context) {
    return Scaffold(
        body: new Column(
      children: <Widget>[
        new Expanded(
          child: new ListView.builder(
            itemCount: dialledCallContacts.length,
            itemBuilder: (context, index) {
              return ListTile(
                title: Text(
                  '${dialledCallContacts[index].fullName}',
                ),
                subtitle: Text('${dialledCallContacts[index].email}'),
                leading: new CircleAvatar(
                    backgroundColor: Colors.blue,
                    child:
                        Text('${dialledCallContacts[index].fullName.substring(
                            0, 1)}')),
                onTap: () => _onTapItem(context, dialledCallContacts[index]),
              );
            },
          ),
        ),
      ],
    ));
  }

  void _onTapItem(BuildContext context, Contact post) {
    Scaffold.of(context).showSnackBar(
        new SnackBar(content: new Text("Tap on " + ' - ' + post.fullName)));
  }
}

class Contact {
  final String fullName;
  final String email;

  const Contact({this.fullName, this.email});
}

Flutter Tabbar Example

Flutter Tabbar Example


 



main.dart
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import 'package:akeepo/tabbar.dart';
import 'package:flutter/material.dart';
void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
 

  @override  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      
      ),
      home: TabBarDemo(),
   
    );
  }
}




tabbar.dart
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import 'package:flutter/material.dart';

class TabBarDemo extends StatelessWidget {
  @override  Widget build(BuildContext context) {
    return MaterialApp(
      home: DefaultTabController(
        length: 3,
        child: Scaffold(
          appBar: AppBar(
            bottom: TabBar(
              tabs: [
                Tab(text: "Calls", icon: Icon(Icons.call_made)),
                Tab(text: "Missed",icon: Icon(Icons.call_missed)),
                Tab(text: "Received", icon: Icon(Icons.call_received)),
              ],
            ),
            title: Text('Tabs Demo'),
          ),
          body: TabBarView(
            children: [
              DialledCallsPage(),
              MissedCallsPage(),
              ReceivedCallsPage(),
            ],
          ),
        ),
      ),
    );
  }
}

List<Contact> missedCallContacts = [
  Contact(fullName: 'Pratap Kumar', email: 'pratap@example.com'),
  Contact(fullName: 'Jagadeesh', email: 'Jagadeesh@example.com'),
  Contact(fullName: 'Srinivas', email: 'Srinivas@example.com'),
  Contact(fullName: 'Narendra', email: 'Narendra@example.com'),
  Contact(fullName: 'Sravan ', email: 'Sravan@example.com'),
  Contact(fullName: 'Ranganadh', email: 'Ranganadh@example.com'),
  Contact(fullName: 'Karthik', email: 'Karthik@example.com'),
  Contact(fullName: 'Saranya', email: 'Saranya@example.com'),
  Contact(fullName: 'Mahesh', email: 'Mahesh@example.com'),
];

List<Contact> receivedCallContacts = [
  Contact(fullName: 'Pratap Kumar', email: 'pratap@example.com'),
  Contact(fullName: 'Jagadeesh', email: 'Jagadeesh@example.com'),
  Contact(fullName: 'Srinivas', email: 'Srinivas@example.com'),
];

List<Contact> dialledCallContacts = [
  Contact(fullName: 'Ranganadh', email: 'Ranganadh@example.com'),
  Contact(fullName: 'Karthik', email: 'Karthik@example.com'),
  Contact(fullName: 'Saranya', email: 'Saranya@example.com'),
  Contact(fullName: 'Mahesh', email: 'Mahesh@example.com'),
];

class MissedCallsPage extends StatefulWidget {
  @override  State<StatefulWidget> createState() {
    // TODO: implement createState    return new _MissedCallsPage();
  }
}

class _MissedCallsPage extends State<MissedCallsPage> {
  @override  Widget build(BuildContext context) {
    return Scaffold(
        body: new Column(
      children: <Widget>[
        new Expanded(
          child: new ListView.builder(
            itemCount: missedCallContacts.length,
            itemBuilder: (context, index) {
              return ListTile(
                title: Text(
                  '${missedCallContacts[index].fullName}',
                ),
                subtitle: Text('${missedCallContacts[index].email}'),
                leading: new CircleAvatar(
                    backgroundColor: Colors.blue,
                    child: Text('${missedCallContacts[index].fullName.substring(
                                0, 1)}')),
                onTap: () => _onTapItem(context, missedCallContacts[index]),
              );
            },
          ),
        ),
      ],
    ));
  }

  void _onTapItem(BuildContext context, Contact post) {
    Scaffold.of(context).showSnackBar(
        new SnackBar(content: new Text("Tap on " + ' - ' + post.fullName)));
  }
}

class ReceivedCallsPage extends StatefulWidget {
  @override  State<StatefulWidget> createState() {
    // TODO: implement createState    return new _ReceivedCallsPage();
  }
}

class _ReceivedCallsPage extends State<ReceivedCallsPage> {
  @override  Widget build(BuildContext context) {
    return Scaffold(
        body: new Column(
      children: <Widget>[
        new Expanded(
          child: new ListView.builder(
            itemCount: receivedCallContacts.length,
            itemBuilder: (context, index) {
              return ListTile(
                title: Text(
                  '${receivedCallContacts[index].fullName}',
                ),
                subtitle: Text('${receivedCallContacts[index].email}'),
                leading: new CircleAvatar(
                    backgroundColor: Colors.blue,
                    child:
                        Text('${receivedCallContacts[index].fullName.substring(
                                0, 1)}')),
                onTap: () => _onTapItem(context, receivedCallContacts[index]),
              );
            },
          ),
        ),
      ],
    ));
  }

  void _onTapItem(BuildContext context, Contact post) {
    Scaffold.of(context).showSnackBar(
        new SnackBar(content: new Text("Tap on " + ' - ' + post.fullName)));
  }
}

class DialledCallsPage extends StatefulWidget {
  @override  State<StatefulWidget> createState() {
    // TODO: implement createState    return new _DialledCallsPage();
  }
}

class _DialledCallsPage extends State<DialledCallsPage> {
  @override  Widget build(BuildContext context) {
    return Scaffold(
        body: new Column(
      children: <Widget>[
        new Expanded(
          child: new ListView.builder(
            itemCount: dialledCallContacts.length,
            itemBuilder: (context, index) {
              return ListTile(
                title: Text(
                  '${dialledCallContacts[index].fullName}',
                ),
                subtitle: Text('${dialledCallContacts[index].email}'),
                leading: new CircleAvatar(
                    backgroundColor: Colors.blue,
                    child:
                        Text('${dialledCallContacts[index].fullName.substring(
                                0, 1)}')),
                onTap: () => _onTapItem(context, dialledCallContacts[index]),
              );
            },
          ),
        ),
      ],
    ));
  }

  void _onTapItem(BuildContext context, Contact post) {
    Scaffold.of(context).showSnackBar(
        new SnackBar(content: new Text("Tap on " + ' - ' + post.fullName)));
  }
}

class Contact {
  final String fullName;
  final String email;

  const Contact({this.fullName, this.email});
}

Monday 27 August 2018

Flutter ListView Search


 


contactslist.dart
================


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class ContactsList extends StatefulWidget {
  static String tag = 'contactlist-page';

  @override  State<StatefulWidget> createState() {
       return new _ContactsListState();
  }
}

List<Contact> contacts = [
  Contact(fullName: 'Pratap Kumar', email: 'pratap@example.com'),
  Contact(fullName: 'Jagadeesh', email: 'Jagadeesh@example.com'),
  Contact(fullName: 'Srinivas', email: 'Srinivas@example.com'),
  Contact(fullName: 'Narendra', email: 'Narendra@example.com'),
  Contact(fullName: 'Sravan ', email: 'Sravan@example.com'),
  Contact(fullName: 'Ranganadh', email: 'Ranganadh@example.com'),
  Contact(fullName: 'Karthik', email: 'Karthik@example.com'),
  Contact(fullName: 'Saranya', email: 'Saranya@example.com'),
  Contact(fullName: 'Mahesh', email: 'Mahesh@example.com'),
];
class _ContactsListState extends State<ContactsList> {
  TextEditingController searchController = new TextEditingController();
  String filter;

  @override  initState() {
    searchController.addListener(() {
      setState(() {
        filter = searchController.text;
      });
    });
  }

  @override  void dispose() {
    searchController.dispose();
    super.dispose();
  }

  @override  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
            title: Text('Contacts',
                style: TextStyle(
                    color: Colors.white, fontWeight: FontWeight.bold))),
        body: new Column(
          children: <Widget>[
            new Padding(
              padding: new EdgeInsets.all(8.0),
              child: new TextField(
                controller: searchController,
                decoration: InputDecoration(
                  hintText: 'Search Contacts',
                  contentPadding: EdgeInsets.fromLTRB(20.0, 15.0, 20.0, 15.0),
                  border: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(32.0)),
                ),
              ),
            ),
            new Expanded(
              child: new ListView.builder(
                itemCount: contacts.length,
                itemBuilder: (context, index) {
                  // if filter is null or empty returns all data                  return filter == null || filter == ""                      ? ListTile(
                          title: Text(
                            '${contacts[index].fullName}',
                          ),
                          subtitle: Text('${contacts[index].email}'),
                          leading: new CircleAvatar(
                              backgroundColor: Colors.blue,
                              child: Text(
                                  '${contacts[index].fullName.substring(0, 1)}')),
                          onTap: () => _onTapItem(context, contacts[index]),
                        )
                      : '${contacts[index].fullName}'                              .toLowerCase()
                              .contains(filter.toLowerCase())
                          ? ListTile(
                              title: Text(
                                '${contacts[index].fullName}',
                              ),
                              subtitle: Text('${contacts[index].email}'),
                              leading: new CircleAvatar(
                                  backgroundColor: Colors.blue,
                                  child: Text(
                                      '${contacts[index].fullName.substring(0, 1)}')),
                              onTap: () =>
                                  _onTapItem(context, contacts[index]),
                            )
                          : new Container();
                },
              ),
            ),
          ],
        ));
  }

  void _onTapItem(BuildContext context, Contact post) {
    Scaffold.of(context).showSnackBar(
        new SnackBar(content: new Text("Tap on " + ' - ' + post.fullName)));
  }
}


class Contact {
  final String fullName;
  final String email;

  const Contact({this.fullName, this.email});
}








main.dart
===========


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import 'package:flutter/material.dart';
import 'package:users/contactslist.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  

  @override  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Contacts',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.lightBlue,
       
      ),
      home: ContactsList(),
     
    );
  }
}