The connectivity_plus
package is a popular tool in Flutter for monitoring network connectivity status across platforms like Android and iOS. This post will provide an SEO-optimized guide to help you rank on Google, along with a complete Flutter code example using GetX for controller binding and view with a beautified UI.
Table of Contents:
- What is
connectivity_plus
? - Why Use
connectivity_plus
in Flutter? - Features of
connectivity_plus
- Installing
connectivity_plus
in Your Flutter Project - Full Code Example: Controller Binding and View
- Beautified UI for Network Status
- Conclusion
What is connectivity_plus
?
The connectivity_plus
package allows developers to check the network status of a device in Flutter. It detects whether the user is connected to the internet via WiFi, mobile data, or offline.
Why Use connectivity_plus
in Flutter?
In many applications, internet connectivity plays a critical role. Whether you are building an e-commerce app or a social media app, knowing the device's network status is important for managing online/offline operations and providing a smooth user experience.
Key benefits include:
- Monitoring real-time connectivity changes.
- Notifying users about network disconnection.
- Helping apps adapt to connectivity conditions like switching between WiFi and mobile data.
Features of connectivity_plus
- Cross-platform: Supports both Android and iOS.
- Event-driven: Listens for changes in connectivity status.
- Easy integration: Comes with a simple API for checking and listening to connectivity.
Installing connectivity_plus
in Your Flutter Project
To use connectivity_plus
, first, add the package to your pubspec.yaml
file:
dependencies:
flutter:
sdk: flutter
connectivity_plus: ^4.0.3 # Use the latest version
Then, run:flutter pub get
Full Code Example: Controller Binding and View
In this example, we will use GetX for state management and controller binding to manage network connectivity.
Step 1: Setting up the GetX Controller
Create a file connectivity_controller.dart
and define a GetX controller to handle connectivity status:
import 'package:connectivity_plus/connectivity_plus.dart';
import 'package:get/get.dart';
class ConnectivityController extends GetxController {
var connectionStatus = 0.obs; // 0 - Unknown, 1 - WiFi, 2 - Mobile, 3 - Offline
final Connectivity _connectivity = Connectivity();
@override
void onInit() {
super.onInit();
_checkConnection();
_connectivity.onConnectivityChanged.listen(_updateConnectionStatus);
}
Future _checkConnection() async {
var connectivityResult = await _connectivity.checkConnectivity();
_updateConnectionStatus(connectivityResult);
}
void _updateConnectionStatus(ConnectivityResult result) {
switch (result) {
case ConnectivityResult.wifi:
connectionStatus.value = 1;
break;
case ConnectivityResult.mobile:
connectionStatus.value = 2;
break;
case ConnectivityResult.none:
connectionStatus.value = 3;
break;
default:
connectionStatus.value = 0;
break;
}
}
}
Step 2: Creating the UI
Now, create the UI to display the connectivity status in main.dart
.
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'connectivity_controller.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return GetMaterialApp(
title: 'Connectivity Plus Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: HomeScreen(),
);
}
}
class HomeScreen extends StatelessWidget {
final ConnectivityController controller = Get.put(ConnectivityController());
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Network Status'),
),
body: Center(
child: Obx(() {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Icon(
_getConnectionIcon(controller.connectionStatus.value),
size: 100,
color: _getConnectionColor(controller.connectionStatus.value),
),
SizedBox(height: 20),
Text(
_getConnectionText(controller.connectionStatus.value),
style: TextStyle(fontSize: 24),
),
],
);
}),
),
);
}
IconData _getConnectionIcon(int status) {
switch (status) {
case 1:
return Icons.wifi;
case 2:
return Icons.signal_cellular_alt;
case 3:
return Icons.signal_wifi_off;
default:
return Icons.help_outline;
}
}
Color _getConnectionColor(int status) {
switch (status) {
case 1:
return Colors.green;
case 2:
return Colors.orange;
case 3:
return Colors.red;
default:
return Colors.grey;
}
}
String _getConnectionText(int status) {
switch (status) {
case 1:
return "Connected to WiFi";
case 2:
return "Using Mobile Data";
case 3:
return "No Internet Connection";
default:
return "Unknown Network Status";
}
}
}
Beautified UI for Network Status
In the above UI:
- Icons: Represent different connection states such as WiFi, mobile data, or no connection.
- Colors: Different colors (green, orange, red) are used to highlight the current network status.
- Dynamic Text: Text changes dynamically based on the connection status.
You can further enhance this UI by adding animations or better design elements such as custom fonts, shadow effects, or background gradients.
Conclusion
Using connectivity_plus
in your Flutter application allows you to monitor network connectivity easily and efficiently. With the GetX package for state management, the implementation becomes seamless. By following this guide, you can quickly integrate connectivity monitoring into your app and provide users with real-time feedback on their network status.
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