mobileCyberGamesApp/lib/pages/MyCode.dart

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'dart:ui';
import 'dart:typed_data';
import 'dart:async';
import 'package:qr_flutter/qr_flutter.dart';
import 'package:redux/redux.dart';
import 'package:flutter_redux/flutter_redux.dart';
import '../redux/AppState.dart';
import '../model/UserInfo.dart';
import '../widget/LinearButton.dart';
import 'dart:ui' as ui;
import 'dart:io';
import 'package:path_provider/path_provider.dart';
import '../widget/Dialog.dart';
import '../net/HttpManager.dart';


class MyCode extends StatefulWidget {
  @override
  MyCodeState createState() => MyCodeState();
}

class MyCodeState extends State<MyCode> {
  GlobalKey globalKey = new GlobalKey();

  // 截图boundary，并且返回图片的二进制数据。
  Future<Uint8List> _capturePng() async {
    RenderRepaintBoundary boundary =
        globalKey.currentContext.findRenderObject();
    ui.Image image = await boundary.toImage();
    // 注意：png是压缩后格式，如果需要图片的原始像素数据，请使用rawRgba
    ByteData byteData = await image.toByteData(format: ui.ImageByteFormat.png);
    Uint8List pngBytes = byteData.buffer.asUint8List();
    return pngBytes;
  }

  Future<String> _capturePath(String name) async {
    Directory documentsDirectory = await getExternalStorageDirectory();
    String path = documentsDirectory.path + name;
    return path;
  }

  @override
  Widget build(BuildContext context) {
    AppBar appbar = AppBar(title: Text('我的推广码'), centerTitle: true);
    double _height = MediaQuery.of(context).size.height -
        MediaQueryData.fromWindow(window).padding.top -
        appbar.preferredSize.height;

    return StoreConnector<AppState, UserInfo>(
        converter: (Store store) => store.state.userInfo,
        builder: (context, userInfo) {
          String qrstr =HttpManager.baseUrl+"share?userId=${userInfo.id}&channel=${userInfo.channel}";
          // final cryptor = new PlatformStringCryptor();
          return RepaintBoundary(
              key: globalKey,
              child: Scaffold(
                  appBar: appbar,
                  body: Container(
                    color: Color(0xFF2B2B42),
                    height: double.infinity,
                    width: double.infinity,
                    child: SingleChildScrollView(
                      child: Container(
                        height: _height - 60,
                        constraints: BoxConstraints(minHeight: 543),
                        margin:
                            EdgeInsets.symmetric(vertical: 30, horizontal: 30),
                        color: Color(0xFF363759),
                        child: Column(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: <Widget>[
                            Container(height: 36),
                            Image.asset('images/text_yonghuduan.png'),
                            Container(height: 25),
                            Container(
                              width: 150,
                              height: 150,
                              color: Colors.white,
                              // padding: EdgeInsets.all(7),
                              child: QrImage(
                                data: qrstr,
                                size: 150.0,
                              ),
                            ),
                            Container(
                              height: 10,
                            ),
                            Text(
                              '扫一扫下载APP',
                              style: TextStyle(
                                  color: Colors.white,
                                  fontSize: 14,
                                  fontWeight: FontWeight.w500),
                            ),
                            Container(
                              margin: EdgeInsets.only(top: 30),
                              width: 180,
                              child: LinearButton(
                                btntext: '立刻邀请',
                                btnHeight: 44.0,
                                colorList: [
                                  Color(0xFFD4504B),
                                  Color(0xFFD4504B)
                                ],
                                onTapHomeMenu: () async {
                                  MyDialog.showDialog(context, '手动截图立即分享二维码给小伙伴吧！');
                                  // final Io.Directory systemTempDir =
                                  //     Io.Directory.systemTemp;
                                  // final Io.File file = await new Io.File(
                                  //         '${systemTempDir.path}/temp.png')
                                  //     .create();
                                  // print(file);
                                  // List<int> bytes = await _capturePng();
                                  // await file.writeAsBytes(bytes);
                                  // print('保存成功');
                                },
                              ),
                            ),
                            Expanded(
                              flex: 1,
                              child: Container(),
                            ),
                            Image.asset('images/img_0000.png'),
                          ],
                        ),
                      ),
                    ),
                  )));
        });
  }
}