qrcode 0.0.2

qrcode: ^0.0.2 copied to clipboard

example/lib/main.dart

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

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
  QRCaptureController _captureController = QRCaptureController();
  Animation<Alignment> _animation;
  AnimationController _animationController;

  @override
  void initState() {
    super.initState();

    _captureController.onCapture((data) {
      print('onCapture----$data');
    });

    _animationController =
        AnimationController(vsync: this, duration: Duration(seconds: 1));
    _animation =
        AlignmentTween(begin: Alignment.topCenter, end: Alignment.bottomCenter)
            .animate(_animationController)
              ..addListener(() {
                setState(() {});
              })
              ..addStatusListener((status) {
                if (status == AnimationStatus.completed) {
                  _animationController.reverse();
                } else if (status == AnimationStatus.dismissed) {
                  _animationController.forward();
                }
              });
    _animationController.forward();
  }

  @override
  void dispose() {
    _animationController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        floatingActionButton: Row(
          mainAxisSize: MainAxisSize.max,
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            FlatButton(
              onPressed: () {
                _captureController.pause();
              },
              child: Text('pause'),
            ),
            FlatButton(
              onPressed: () {
                _captureController.resume();
              },
              child: Text('resume'),
            ),
          ],
        ),
        appBar: AppBar(
          title: const Text('扫一扫'),
        ),
        body: Stack(
          alignment: Alignment.center,
          children: <Widget>[
            QRCaptureView(
              controller: _captureController,
            ),
            Padding(
              padding: EdgeInsets.symmetric(horizontal: 56),
              child: AspectRatio(
                aspectRatio: 264 / 258.0,
                child: Stack(
                  alignment: _animation.value,
                  children: <Widget>[
                    Image.asset('images/sao@3x.png'),
                    Image.asset('images/tiao@3x.png')
                  ],
                ),
              ),
            )
          ],
        ),
      ),
    );
  }
}