aim_pointer/lib/setting/wifi_page.dart

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/scheduler.dart';

import 'package:wifi_iot/wifi_iot.dart';
import 'dart:async';
import 'package:wifi_scan/wifi_scan.dart';

import '../login_in/connect/wifi.dart';

SocketSetting socket = SocketSetting();

class WifiPage extends StatefulWidget {
  const WifiPage({super.key});

  @override
  State<WifiPage> createState() => _WifiPageState();
}

class _WifiPageState extends State<WifiPage> {
  String ip = "192.168.4.1";
  int port = 6000;
  @override
  void initState() {
    super.initState();
    SchedulerBinding.instance.addPostFrameCallback((_) async {
      await _getScannedResults(context);
    });
  }

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
  }

  reconnectToWifi(currentTitle, password, withInternet) async {
    String ssid = currentTitle;
    bool isConnected = await WiFiForIoTPlugin.isConnected();
    if (isConnected) {
      // 断开当前WiFi连接
      await WiFiForIoTPlugin.disconnect();
    }

    // 连接到指定WiFi网络
    await WiFiForIoTPlugin.connect(ssid,
        password: password,
        security: NetworkSecurity.WPA,
        withInternet: withInternet);

    // 检查连接状态
    isConnected = await WiFiForIoTPlugin.isConnected();
    if (isConnected) {
      connectedssid = ssid;

      setState(() {});
      print("Successfully reconnected to WiFi network: $ssid");
    } else {
      print("Failed to reconnect to WiFi network: $ssid");
    }
  }

  List<WiFiAccessPoint> accessPoints = <WiFiAccessPoint>[];
  StreamSubscription<List<WiFiAccessPoint>>? subscription;
  bool shouldCheckCan = true;
  Future<bool> _canGetScannedResults(BuildContext context) async {
    if (shouldCheckCan) {
      // check if can-getScannedResults
      final can = await WiFiScan.instance.canGetScannedResults();
      // if can-not, then show error
      if (can != CanGetScannedResults.yes) {
        if (mounted) kShowSnackBar(context, "Cannot get scanned results: $can");
        accessPoints = <WiFiAccessPoint>[];
        return false;
      }
    }
    return true;
  }

  Future<void> _getScannedResults(BuildContext context) async {
    if (await _canGetScannedResults(context)) {
      // get scanned results
      final results = await WiFiScan.instance.getScannedResults();
      setState(() => accessPoints = results);
    }
  }

  bool withInternet = false;
  String password = "01010101";
  String currentTitle = "";
  String connectedssid = "";
  @override
  Widget build(BuildContext context) {
    final size = MediaQuery.of(context).size;
    final isDarkMode = Theme.of(context).brightness == Brightness.dark;
    TextEditingController passWordController =
        TextEditingController(text: password);

    List<Widget> children = [
      Row(
        children: [
          const Text("是否允许上网:"),
          Switch(
              value: withInternet,
              onChanged: ((value) {
                setState(() {
                  withInternet = value;
                });
              })),
        ],
      ),
      TextFormField(
        controller: passWordController,
        obscureText: true,
        decoration: const InputDecoration(
          prefixText: '密码:',
          border: InputBorder.none,
        ),
        onChanged: (String value) {
          password = value;
        },
      )
    ];
    return Scaffold(
      appBar: AppBar(
        toolbarHeight: 40,
        title: const Text('WiFi列表'),
        actions: [
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 10),
            child: IconButton(
                onPressed: () async => _getScannedResults(context),
                icon: const Icon(Icons.refresh)),
          )
        ],
      ),
      body: Builder(
        builder: (context) => Padding(
          padding: const EdgeInsets.symmetric(vertical: 0, horizontal: 20),
          child: Column(
            mainAxisSize: MainAxisSize.max,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              const Divider(),
              Flexible(
                child: Center(
                  child: accessPoints.isEmpty
                      ? const Text("空")
                      : ListView.builder(
                          itemCount: accessPoints.length,
                          itemBuilder: (context, i) {
                            var accessPoint = accessPoints[i];
                            var signalIcon = accessPoint.level >= -80
                                ? Icons.signal_wifi_4_bar
                                : Icons.signal_wifi_0_bar;
                            int level = accessPoint.level;
                            if (level <= -80) {
                              signalIcon = Icons.signal_wifi_0_bar; // 弱信号
                            } else if (level > -80 && level <= -70) {
                              signalIcon = Icons.network_wifi_2_bar_sharp; // 较弱
                            } else if (level > -70 && level <= -60) {
                              signalIcon = Icons.network_wifi_3_bar_sharp; // 较好
                            } else if (level > -60 && level <= -50) {
                              signalIcon = Icons.network_wifi; // 较强
                            } else {
                              signalIcon = Icons.signal_wifi_4_bar; // 强信号
                            }

                            final title = accessPoint.ssid.isNotEmpty
                                ? accessPoint.ssid
                                : "";

                            return ListTile(
                              visualDensity: VisualDensity.compact,
                              leading: Icon(signalIcon),
                              title: Text(title),
                              subtitle: Text(accessPoint.bssid),
                              trailing: ElevatedButton(
                                  child: Text(
                                      connectedssid == accessPoint.ssid &&
                                              connectedssid != ""
                                          ? "已连接"
                                          : '连接'),
                                  onPressed: () {
                                    currentTitle = title;
                                    Scaffold.of(context).openEndDrawer();
                                  }),
                              onTap: () {
                                currentTitle = title;
                                Scaffold.of(context).openEndDrawer();
                              },
                            );
                          }),
                ),
              ),
            ],
          ),
        ),
      ),
      endDrawer: Drawer(
        backgroundColor: isDarkMode ? Colors.black : Colors.white,
        width: size.width * .8,
        child: SingleChildScrollView(
          child: Container(
            height: size.height,
            padding: const EdgeInsets.fromLTRB(5, 20, 5, 20),
            child: Stack(
              children: [
                Column(
                  children: children,
                ),
                Positioned(
                    bottom: 20,
                    left: 10,
                    child: Row(
                      children: [
                        TextButton(
                            onPressed: () {
                              Navigator.of(context).pop();
                            },
                            child: const Text("取消")),
                        TextButton(
                          onPressed: () async {
                            Navigator.of(context).pop();
                            await reconnectToWifi(
                                currentTitle, password, withInternet);
                          },
                          child: const Text("确认"),
                        ),
                        TextButton(
                          onPressed: () async {
                            Navigator.of(context).pop();
                            await socket.connect();
                          },
                          child: const Text("连接"),
                        )
                      ],
                    ))
              ],
            ),
          ),
        ),
      ),
    );
  }
}

void kShowSnackBar(BuildContext context, String message) {
  if (kDebugMode) print(message);
  ScaffoldMessenger.of(context)
    ..hideCurrentSnackBar()
    ..showSnackBar(SnackBar(content: Text(message)));
}