Handle connectivity in flutter. in a minute |
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Handle connectivity in flutter. in a minute
Handle connectivity in flutter  Md Sadab Wasim ·Follow Published inINDIAN CODER ·2 min read·Nov 11, 2018-- in a minute In some apps, we need the user to be connected with the internet, so that we can do our background work flawlessly. In this article, we are going to learn how can we check that, whether our app is connected to the internet or not without using connectivity plugin. Why? The connectivity plugin states in its docs that it only provides information if there is a network connection, but not if the network is connected to the Internet. Note that on Android, this does not guarantee connection to Internet. For instance, the app might have wifi access but it might be a VPN or a hotel WiFi with no access. Let’s create a method that returns a Future and let us know whether the user is online or offline. //Use dart.io for lookup method.import 'dart:io';Future _checkConnectivity() async {bool connect;try {final result = await InternetAddress.lookup('google.com');if (result.isNotEmpty && result[0].rawAddress.isNotEmpty) {connect = true;}} on SocketException catch (_) {connect = false;}return connect;}Here we are just checking a website response ( google.com) if it is successful which means our app is connected to the internet. Now you can use this method anywhere in your app to verify that your app is online or not. Here’s an example @overrideWidget build(BuildContext context) {bool connected;_checkConnectivity().then((internet) {setState(() {connected = internet;});});return new Scaffold(body: connected ? OnlineWork() : OfflineWork(););}That’s it, folks I hope you guys learn something new. check out my other articles on flutter. Don’t forget to hit the clap button 👏 👏 |
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