Flutter之炫酷扫描闹钟：让你睡前有趣的闹钟应用

Android

2023-10-15 09:59:26

前言

闹钟是我们日常生活中必不可少的工具，它可以帮助我们准时起床，避免错过重要的事情。随着智能手机的普及，闹钟也从传统的实体闹钟发展到了手机闹钟。手机闹钟不仅功能更多，而且更加个性化，可以根据自己的喜好来设置闹钟铃声、闹钟背景等。

炫酷扫描闹钟的设计理念

传统的闹钟都是通过按键来设置闹钟，虽然简单方便，但是缺乏趣味性。炫酷扫描闹钟则采用了创新的二维码扫描方式来设置闹钟，让用户在睡前通过扫描二维码来设置闹钟。

实现炫酷扫描闹钟

创建用户界面

首先，我们需要创建一个简单的用户界面，包括一个二维码扫描按钮、一个闹钟时间输入框和一个设置闹钟按钮。

class AlarmClockScreen extends StatefulWidget {
  @override
  _AlarmClockScreenState createState() => _AlarmClockScreenState();
}

class _AlarmClockScreenState extends State<AlarmClockScreen> {
  String _alarmTime = '';

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('炫酷扫描闹钟'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text('请扫描二维码设置闹钟时间'),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: () {},
              child: Text('扫描二维码'),
            ),
            SizedBox(height: 20),
            TextField(
              decoration: InputDecoration(
                hintText: '请输入闹钟时间',
              ),
              onChanged: (value) {
                _alarmTime = value;
              },
            ),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: () {
                // 设置闹钟
              },
              child: Text('设置闹钟'),
            ),
          ],
        ),
      ),
    );
  }
}

集成二维码扫描功能

接下来，我们需要集成二维码扫描功能。我们可以使用Flutter中的二维码扫描插件来实现这一功能。

import 'package:flutter/material.dart';
import 'package:qr_code_scanner/qr_code_scanner.dart';

class QrCodeScannerScreen extends StatefulWidget {
  @override
  _QrCodeScannerScreenState createState() => _QrCodeScannerScreenState();
}

class _QrCodeScannerScreenState extends State<QrCodeScannerScreen> {
  Barcode? result;
  QRViewController? controller;

  @override
  void reassemble() {
    super.reassemble();
    if (Platform.isAndroid) {
      controller!.pauseCamera();
    } else if (Platform.isIOS) {
      controller!.resumeCamera();
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        children: <Widget>[
          QRView(
            key: GlobalKey(),
            onQRViewCreated: _onQRViewCreated,
          ),
          Center(
            child: (result != null)
                ? Text(
                    'Barcode Type: ${describeEnum(result!.format)}   Data: ${result!.code}')
                : Text('Scan a code'),
          )
        ],
      ),
    );
  }

  void _onQRViewCreated(QRViewController controller) {
    this.controller = controller;
    controller.scannedDataStream.listen((scanData) {
      setState(() {
        result = scanData;
      });
    });
  }

  @override
  void dispose() {
    controller?.dispose();
    super.dispose();
  }
}

设置闹钟和闹钟提醒

最后，我们需要实现闹钟的设置和提醒功能。我们可以使用Flutter中的闹钟插件来实现这一功能。

import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';

class AlarmClockService {
  static final FlutterLocalNotificationsPlugin _notificationsPlugin =
      FlutterLocalNotificationsPlugin();

  static void initialize() {
    // 初始化通知插件
    const AndroidInitializationSettings initializationSettingsAndroid =
        AndroidInitializationSettings('@mipmap/ic_launcher');
    const IOSInitializationSettings initializationSettingsIOS =
        IOSInitializationSettings();
    const InitializationSettings initializationSettings = InitializationSettings(
        android: initializationSettingsAndroid, iOS: initializationSettingsIOS);
    _notificationsPlugin.initialize(initializationSettings);
  }

  static void setAlarm(DateTime scheduledNotificationDateTime) async {
    // 设置闹钟
    const AndroidNotificationDetails androidPlatformChannelSpecifics =
        AndroidNotificationDetails(
            'your channel id', 'your channel name',
            channelDescription: 'your channel description',
            importance: Importance.max,
            priority: Priority.high,
            ticker: 'ticker');
    const IOSNotificationDetails iOSPlatformChannelSpecifics =
        IOSNotificationDetails();
    const NotificationDetails platformChannelSpecifics = NotificationDetails(
        android: androidPlatformChannelSpecifics, iOS: iOSPlatformChannelSpecifics);
    await _notificationsPlugin.schedule(0, '闹钟', '起床时间到啦！',
        scheduledNotificationDateTime, platformChannelSpecifics);
  }
}