Flutter卡片扫描插件flutter_card_scanner的使用

Flutter卡片扫描插件flutter_card_scanner的使用

功能描述

我们的卡扫描功能是一个强大的工具，使用户能够通过设备的摄像头轻松捕获和数字化物理卡片，例如名片、身份证等。此功能简化了将重要卡片信息存储和管理为数字格式的过程。

完整示例代码

import 'dart:io';

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

import 'package:flutter/services.dart';
import 'package:flutter_card_scanner/flutter_card_scanner.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:flutter_card_scanner/card_scanner_image.dart';

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

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

  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  File? scannedCard;
  Future<PermissionStatus>? cameraPermissionFuture;

  [@override](/user/override)
  void initState() {
    super.initState();
    cameraPermissionFuture = Permission.camera.request();
  }

  Future<PermissionStatus> requestCamera() async {
    return Permission.camera.request();
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Card Scanner App'),
        ),
        body: FutureBuilder<PermissionStatus>(
          future: requestCamera(),
          builder: (BuildContext context, AsyncSnapshot<PermissionStatus> snapshot) {
            if (snapshot.connectionState == ConnectionState.done) {
              if (snapshot.data! == PermissionStatus.granted) {
                return Stack(
                  children: <Widget>[
                    Column(
                      children: <Widget>[
                        Expanded(
                          child: scannedCard != null
                              ? Image(
                                  image: FileImage(scannedCard!),
                                )
                              : CardScanner(
                                  // documentAnimation: false,
                                  noGrayScale: true,
                                  onCardScanned: (CardScannedImage scannedImage) {
                                    print("card : " + scannedImage.croppedImage!);

                                    setState(() {
                                      scannedCard = scannedImage.getScannedCardAsFile();
                                      // imageLocation = image;
                                    });
                                  },
                                ),
                        ),
                      ],
                    ),
                    scannedCard != null
                        ? Positioned(
                            bottom: 20,
                            left: 0,
                            right: 0,
                            child: ElevatedButton(
                              child: Text("Retry"),
                              onPressed: () {
                                setState(() {
                                  scannedCard = null;
                                });
                              },
                            ),
                          )
                        : Container(),
                  ],
                );
              } else {
                Permission.camera.request();
                return const Center(
                  child: Text("Camera permission denied"),
                );
              }
            } else {
              return const Center(
                child: CircularProgressIndicator(),
              );
            }
          },
        ),
      ),
    );
  }
}