当颤振设置页面上的振动清单磁贴为真时，如何在扫描仪页面中启用扫描振动？

Question

class ScannerPage extends StatefulWidget {
  final Function(bool) onBeepSettingChanged;
  final bool beepChecked;

   const ScannerPage({Key? key,  required this.onBeepSettingChanged, required this.beepChecked,}) : super(key: key);
   @override
  State<ScannerPage> createState() => _ScannerPageState();
}

class _ScannerPageState extends State<ScannerPage> {
  List<String> selectedImages = [];
  String scanResult = "";
  // bool scannerVibrateEnabled = false;

  Future<void> _vibrate() async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    bool scannervibrationEnabled = prefs.getBool('vibrationEnabled') ?? true;

    if (scannervibrationEnabled ) {
      Vibration.vibrate(duration: 500);
    }
  }
  Future<void> scanQR() async {

    try {
      final scanResult = await FlutterBarcodeScanner.scanBarcode(
        '#ff6666',
        'Cancel',
        true,
        ScanMode.BARCODE,

      );

      if (!mounted) return;
      setState(() {
        this.scanResult = scanResult;
      });
    log('de_alam scanner $scanResult');

    if(scanResult=="-1"){
      return;
    }

      if (scanResult.isNotEmpty) {
        Navigator.push(this.context ,
          MaterialPageRoute(
            builder: (context) => ResultPage(scanResult: scanResult ),
          ),
        );
        // widget.onBeepSettingChanged(widget.beepChecked);
      }
    } on PlatformException {
      setState(() {
        this.scanResult = "Failed to get platform version";
        });
    }
  }

我有一个应用程序，其中有一个 setting_page 。我想在其中添加振动，我希望当我单击振动按钮时它会变为 true，然后当我打开 scanpage 时会产生振动声音扫描。当我在setting_page中检查vibration_button为真时，它会在scanner_page中扫描时产生振动。我在setting_page中使用CheckListTile。请帮助我做到这一点。

Answer 1

据我所知和理解，这就是您一直在寻找的东西。这是一款具有振动功能的二维码扫描仪。在下面编写的代码中，只有当

vibrationEnabled

值为

true

并且扫描二维码

successfully

并且具有

valid

值时，振动器才会振动。

import "dart:async";
import "dart:developer";

import "package:flutter/material.dart";
import "package:flutter_barcode_scanner/flutter_barcode_scanner.dart";
import "package:shared_preferences/shared_preferences.dart";
import "package:vibration/vibration.dart";

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(title: "My App", home: HomePage());
  }
}

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

  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  @override
  void initState() {
    super.initState();
    unawaited(scanQR());
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: Center(
          child: ElevatedButton(onPressed: scanQR, child: const Text("scanQR")),
        ),
      ),
    );
  }

  Future<void> scanQR() async {
    final String result = await FlutterBarcodeScanner.scanBarcode(
      "#ff6666",
      "Cancel",
      true,
      ScanMode.BARCODE,
    );
    log("scanResult: $result");
    if (result.isEmpty) {
      // Write something if result.isEmpty...
    } else if (result == "-1") {
      // Write something if result == "-1"...
    } else if (result.isNotEmpty) {
      await vibrate();
      if (mounted) {
        // Write something if result.isNotEmpty. Your navigation code goes here.
      } else {
        return;
      }
    } else {
      // Write something if result is unknown / undetermined...
    }
    return Future<void>.value();
  }

  Future<void> vibrate() async {
    final SharedPreferences prefs = await SharedPreferences.getInstance();
    (prefs.getBool("vibrationEnabled") ?? true)
        ? await Vibration.vibrate()
        : log("Vibration is disabled");
    return Future<void>.value();
  }
}