flutter检测网络状态
原来使用的插件connectivity已经停止使用,现在使用的是新版的connectivity_plus
插件地址:https://pub.dev/packages/connectivity_plus
import 'package:flutter/material.dart';
import 'package:connectivity_plus/connectivity_plus.dart';
class NetWorkPage extends StatefulWidget {
NetWorkPage({
Key? key}) : super(key: key);
@override
State<NetWorkPage> createState() => _NetWorkPageState();
}
class _NetWorkPageState extends State<NetWorkPage> {
var subscription;
String _state = "";
@override
void initState() {
// TODO: implement initState
super.initState();
subscription = Connectivity()
.onConnectivityChanged
.listen((ConnectivityResult result) {
if (result == ConnectivityResult.wifi) {
setState(() {
_state = "处于WiFi";
});
} else if (result == ConnectivityResult.mobile) {
setState(() {
_state = "处于手机网络";
});
} else {
setState(() {
_state = "没有网络";
});
}
// Got a new connectivity status!
});
}
@override
void dispose() {
// TODO: implement dispose
super.dispose();
subscription.cancel();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("检测网络变化"),
),
body: Center(
child: Text("${_state}"),
),
);
}
}
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({
Key? key}) : super(key: key);
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: NetWorkPage(),
);
}
}