How to Show Automatic Internet Connection Offline Message in Flutter
Introduction
The internet has become an essential part of our daily lives, and mobile applications are no exception. A mobile application that relies on the internet to function can become unusable if the internet connection is lost. One way to handle this issue is to display an automatic internet connection offline message when the application loses its internet connection. In this article, we will discuss how to show an automatic internet connection offline message in Flutter.
Checking Internet Connection
To display an automatic internet connection offline message, we first need to check the internet connection. We can use the `connectivity_plus` package to check the internet connection. This package provides a simple way to check the internet connection and listen for changes in the connection.
Using Connectivity Plus Package
To use the `connectivity_plus` package, we need to add it to our `pubspec.yaml` file. Once we have added the package, we can use it to check the internet connection.
“`dart
import ‘package:connectivityplus/connectivityplus.dart’;
class InternetConnection {
Future
var connectivityResult = await (Connectivity().checkConnectivity());
if (connectivityResult == ConnectivityResult.mobile) {
return true;
} else if (connectivityResult == ConnectivityResult.wifi) {
return true;
} else {
return false;
}
}
}
“`
Displaying Offline Message
Once we have checked the internet connection, we can display an automatic internet connection offline message if the connection is lost. We can use a `SnackBar` or a `Dialog` to display the message.
“`dart
import ‘package:flutter/material.dart’;
class OfflineMessage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Text(‘No internet connection’),
),
);
}
}
“`
Listening for Connection Changes
To display the offline message automatically when the internet connection is lost, we need to listen for changes in the connection. We can use the `onConnectivityChanged` property of the `Connectivity` class to listen for changes.
“`dart
import ‘package:connectivityplus/connectivityplus.dart’;
class InternetConnection {
void listenForConnectionChanges() {
Connectivity().onConnectivityChanged.listen((ConnectivityResult result) {
if (result == ConnectivityResult.none) {
// Display offline message
} else {
// Hide offline message
}
});
}
}
“`
Conclusion
In this article, we have discussed how to show an automatic internet connection offline message in Flutter. We have used the `connectivity_plus` package to check the internet connection and listen for changes in the connection. By displaying an offline message when the internet connection is lost, we can improve the user experience of our application.
FAQ
1. How do I add the connectivity_plus package to my project?
You can add the `connectivity_plus` package to your project by adding it to your `pubspec.yaml` file.
2. How do I check the internet connection in Flutter?
You can check the internet connection in Flutter using the `connectivity_plus` package.
3. How do I display an offline message in Flutter?
You can display an offline message in Flutter using a `SnackBar` or a `Dialog`.
4. How do I listen for changes in the internet connection?
You can listen for changes in the internet connection using the `onConnectivityChanged` property of the `Connectivity` class.
5. Why is it important to display an offline message in my application?
Displaying an offline message in your application can improve the user experience by letting the user know that the application is not working due to a lack of internet connection.
