Flutter插件pacote_sc的使用方法详解

pacote_sc

这是一个新的Flutter包项目。

Getting Started（入门）

这个项目是一个Dart库模块的起点，该模块包含可以轻松共享到多个Flutter或Dart项目的代码。

有关如何开始使用Flutter的帮助，请查看我们的在线文档，其中包含教程、示例、移动开发指南以及完整的API参考。

潜在用途探索

pacote_sc 插件可能用于创建一个多功能的应用程序，例如扫描二维码、生成二维码，并结合广告展示功能。以下是一个基于 pacote_sc 的示例应用程序，展示了其潜在用途。

功能概述

1. 二维码扫描：用户可以通过摄像头扫描二维码。
2. 二维码生成：用户可以输入文本并生成二维码。
3. 广告集成：在某些操作之前展示广告（如Google AdMob）。

示例代码

以下是基于 pacote_sc 的完整示例代码：

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:google_mobile_ads/google_mobile_ads.dart';
import 'package:pacote_sc/screens/scan_create_screen.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:styled_widget/styled_widget.dart';
import 'package:qrscan/qrscan.dart' as scanner;

class Constants {
  static final String ADMOB_BANNER_ID =
      BannerAd.testAdUnitId; // 测试广告ID
  static final String ADMOB_INTERSTITIAL_ID =
      InterstitialAd.testAdUnitId; // 测试插屏广告ID
}

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  MobileAds.instance.initialize();
  SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp])
      .then((_) {
    runApp(MyApp());
  });
}

class MyApp extends StatelessWidget {
  final AdsController adsController = Get.put(AdsController());

  [@override](/user/override)
  Widget build(BuildContext context) {
    return GetMaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(primaryColor: Colors.black),
      home: HomeScreen(),
    );
  }
}

class HomeScreen extends StatelessWidget {
  final controller = Get.put(AppController());

  Future<Widget> _cameraButton() async {
    return MaterialButton(
      onPressed: () async {
        var status = await Permission.camera.status;
        switch (status) {
          case PermissionStatus.granted:
            controller.getQrCodeString();
            break;
          default:
            bool isShow = await Permission.camera.shouldShowRequestRationale;
            if (isShow)
              await Permission.camera.request();
            else
              Get.defaultDialog(
                title: 'Camera Permission',
                buttonColor: Colors.green,
                confirmTextColor: Colors.white,
                cancelTextColor: Colors.black,
                middleText:
                    'This app needs camera access for the QR code reader.',
                textCancel: 'Deny',
                textConfirm: 'Open Settings',
                onConfirm: () => openAppSettings(),
              );
        }
      },
      child: <Widget>[
        Icon(Icons.camera, size: 48),
        Text('Scan QR Code').padding(vertical: 4),
      ].toColumn().padding(vertical: 16, horizontal: 16).padding(vertical: 4),
    );
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Scan & Reader - QR Code')),
      body: SingleChildScrollView(
        child: <Widget>[
          Padding(
            padding: const EdgeInsets.all(8.0),
            child: Text(
              'How do you want to start?',
              style: Get.theme.textTheme.headline5,
            ),
          ),
          Divider(),
          <Widget>[
            FutureBuilder(
                future: _cameraButton(),
                builder: (_, AsyncSnapshot<Widget> snapshot) {
                  switch (snapshot.connectionState) {
                    case ConnectionState.waiting:
                      return Center(child: Text('Waiting for Permission'));
                    default:
                      return snapshot.data!;
                  }
                }),
            MaterialButton(
              onPressed: () {
                Get.to(() => ScanCreateScreen(colorPrimary: Colors.black));
              },
              child: <Widget>[
                Icon(Icons.qr_code_2, size: 48),
                Text('Create QR Code').padding(vertical: 4),
              ].toColumn().padding(vertical: 4).padding(vertical: 4),
            )
          ].toRow(mainAxisAlignment: MainAxisAlignment.spaceAround),
          SizedBox(height: 12),
          Obx(() => AnimatedContainer(
                duration: Duration(milliseconds: 1200),
                child: controller.qrCodeString.value.length > 0
                    ? Padding(
                        padding: const EdgeInsets.symmetric(horizontal: 8.0),
                        child: Card(
                          elevation: 6,
                          child: Column(
                            children: [
                              Padding(
                                padding: const EdgeInsets.only(right: 8, left: 8),
                                child: Row(
                                  children: [
                                    Text(
                                      'QR Code content:',
                                      style: Get.textTheme.subtitle1,
                                      textAlign: TextAlign.left,
                                    ),
                                    Spacer(),
                                    TextButton.icon(
                                      onPressed: () {
                                        controller.qrCodeString.value = '';
                                      },
                                      icon: Icon(Icons.close, size: 18),
                                      label: Text("Close Card"),
                                    )
                                  ],
                                ),
                              ),
                              Padding(
                                padding: const EdgeInsets.symmetric(horizontal: 8.0),
                                child: Container(
                                  decoration: BoxDecoration(
                                    color: Colors.grey[200],
                                    borderRadius: BorderRadius.circular(4),
                                  ),
                                  width: double.maxFinite,
                                  margin: EdgeInsets.only(),
                                  child: Padding(
                                    padding: const EdgeInsets.all(8.0),
                                    child: Text(
                                      controller.qrCodeString.value,
                                      maxLines: 3,
                                      style: Get.textTheme.bodyText1,
                                    ),
                                  ),
                                ),
                              ),
                              Padding(
                                padding: const EdgeInsets.symmetric(
                                  horizontal: 8.0,
                                  vertical: 4,
                                ),
                                child: Row(
                                  mainAxisAlignment:
                                      MainAxisAlignment.spaceAround,
                                  children: [
                                    OutlinedButton.icon(
                                      onPressed: () {},
                                      icon: Icon(Icons.copy, size: 18),
                                      label: Text("Copy"),
                                    ),
                                    OutlinedButton.icon(
                                      onPressed: () {},
                                      icon: Icon(Icons.open_in_browser, size: 18),
                                      label: Text("Open Browser"),
                                    ),
                                    OutlinedButton.icon(
                                      onPressed: () {},
                                      icon: Icon(Icons.share, size: 18),
                                      label: Text("Share"),
                                    )
                                  ],
                                ),
                              ),
                            ],
                          ),
                        ),
                      )
                    : Container(width: 0, height: 0),
              )),
          SizedBox(height: 12),
          Obx(() => adsController.adBannerContainer),
        ].toColumn(),
      ),
    );
  }
}