flutter_app_fuyou/lib/code/version2/YSVersionView.dart

import 'dart:io';
import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutterappfuyou/code/base/YSTools.dart';
import 'package:open_file/open_file.dart';
import 'package:package_info/package_info.dart';
import 'package:path_provider/path_provider.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:url_launcher/url_launcher_string.dart';

class YSVersionView extends StatefulWidget {
  final String content;
  final String url;
  final String buildNumber;
  final bool isMust;
  const YSVersionView({Key key, this.content = '', this.url = '', this.buildNumber, this.isMust=false}) : super(key: key);

  @override
  YSVersionViewState createState() => YSVersionViewState();
}

class YSVersionViewState extends State<YSVersionView> {
  int _progress = 0;
  bool _isTap = false;
  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: () async{
        return false;
      },
      child: Center(child: Container(
        height: 390,
        width: ysWidth(context)-100,
        decoration: const BoxDecoration(
            color: Colors.white,
          borderRadius: BorderRadius.all(Radius.circular(5))
          // image: DecorationImage(image: AssetImage('images/组version.png',),fit: BoxFit.fill)
        ),
        padding: EdgeInsets.all(10),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.end,
          children: [
            Container(
              height: 40,
              child: centerAlertText('发现新版本', size: 16,color: Colors.black,isBold: true),
              alignment: Alignment.center,
            ),
            Container(
              margin: EdgeInsets.only(top: 10),
              height: 320,
              child: Column(
                children: [
                  Container(
                    height: 230,
                    alignment: Alignment.topLeft,
                    padding: const EdgeInsets.all(0),
                    child: SingleChildScrollView(
                      padding: EdgeInsets.all(5),
                      child: centerAlertText('新版本更新说明\n${widget.content}', size: 15,
                          color: const Color(0xFFAFAFAF),line: 100),
                    ),
                  ),
                  GestureDetector(
                    onTap: () async{
                      if(_isTap)return;
                      if(Platform.isAndroid==true){
                        bool isPer = await _checkPermission();
                        if(isPer==true){
                          _isTap = true;
                          _installApk(widget.url);
                        }
                      }else if(Platform.isIOS==true){
                        launchUrlString(widget.url);
                      }
                    },
                    behavior: HitTestBehavior.opaque,
                    child: Container(
                      height: 40,
                      margin: EdgeInsets.only(left: 20,right: 20,top: widget.isMust?30:10,bottom: 10),
                      decoration: const BoxDecoration(
                          color: Colors.pinkAccent,
                          borderRadius: BorderRadius.all(Radius.circular(3))
                      ),
                      alignment: Alignment.center,
                      child: centerAlertText('立即升级${_progress==0||_progress==100?'':' $_progress%'}',
                        color: Colors.white, size: 15,),
                    ),
                  ),
                  if(widget.isMust==false)GestureDetector(
                    onTap: (){Navigator.pop(context);},
                    behavior: HitTestBehavior.opaque,
                    child: Container(
                      height: 30,
                      margin: EdgeInsets.only(left: 20,right: 20),
                      alignment: Alignment.center,
                      child: centerAlertText('稍后升级',color: const Color(0xFFAFAFAF), size: 15,),
                    ),
                  )

                ],
              ),
            )
          ],
        ),
      )),
    );
  }

  Future<bool> _checkPermission() async {
    if(Platform.isAndroid==true){
      if (await Permission.requestInstallPackages.request().isDenied) {
        Map<Permission, PermissionStatus> statuses = await [
          Permission.requestInstallPackages,
        ].request();
        if(statuses[Permission.requestInstallPackages].isDenied){
          return false;
        }
      }
    }
    return true;
  }

  Future<File> _downloadAndroid(String url) async {
    PackageInfo packageInfo = await PackageInfo.fromPlatform();
    /// 创建存储文件
    Directory storageDir = await getExternalStorageDirectory();
    String storagePath = storageDir.path;
    File file = File('$storagePath/${packageInfo.appName}v'
        '${packageInfo.buildNumber}.apk');
    if (!file.existsSync()) {
      file.createSync();
    }
    try {
      LogUtil.d(url);
      /// 发起下载请求
      Response response = await Dio().get(
        url,
        onReceiveProgress: showDownloadProgress,
        options: Options(responseType: ResponseType.bytes,followRedirects: true,)
      );
      file.writeAsBytesSync(response.data);
      return file;
    } catch (e) {
      LogUtil.d(e);
      return null;
    }
  }

  /// 安装apk
  Future<void> _installApk(String url) async {
    File apkFile = await _downloadAndroid(url);
    String apkFilePath = apkFile.path;

    if (apkFilePath.isEmpty) {
      return;
    }
    OpenFile.open(apkFilePath);
  }

  /// 展示下载进度
  void showDownloadProgress(num received, num total) {
    if (total != -1) {
      _progress = int.parse('${(received / total~/0.01)}');
      setState(() {});
      if(_progress==100){
        _isTap = false;
      }
    }
  }

}

centerAlertText(String text,{Color color = Colors.white,double size,bool isBold = false,int line = 1}) {
  return Text(text,style: TextStyle(fontSize: size,color: color,decoration: TextDecoration.none,
    fontWeight: isBold?FontWeight.bold:FontWeight.normal,),maxLines: line,overflow: TextOverflow.ellipsis,);
}