flutter_tzh/lib/tool/YSVersionView.dart

import 'dart:io';
import 'package:dio/dio.dart';
import 'package:flutter/material.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';
import 'YSTools.dart';

class YSVersionView extends StatefulWidget {
  final String content;
  final String url;
  const YSVersionView({Key? key, this.content = '', this.url = ''}) : 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: hsp(330),
        width: ysWidth(context)-hsp(100),
        decoration: const BoxDecoration(
          color: Colors.white,
          borderRadius: BorderRadius.all(Radius.circular(5))
        ),
        padding: EdgeInsets.all(hsp(10)),
        child: Column(
          children: [
            Container(
              height: hsp(30),
              alignment: Alignment.center,
              child: centerAlertText('发现新版本', size: 18,
                  color: Colors.black,line: 100),
            ),
            Container(
              height: hsp(230),
              alignment: Alignment.topLeft,
              padding: const EdgeInsets.only(bottom: 10),
              child: SingleChildScrollView(
                padding: EdgeInsets.all(hsp(5)),
                child: centerAlertText(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: hsp(40),
                margin: EdgeInsets.only(left: hsp(20),right: hsp(20)),
                decoration: const BoxDecoration(
                    color: Color(0xFF146DFE),
                    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,),
              ),
            ),
          ],
        ),
      )),
    );
  }

  Future<bool> _checkPermission() async {
    if(Platform.isAndroid==true){
      if (await Permission.contacts.request().isDenied) {
        Map<Permission, PermissionStatus> statuses = await [
          Permission.storage,
        ].request();
        if(statuses[Permission.storage]!.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 {
      /// 发起下载请求
      Response response = await Dio().get(url,
          onReceiveProgress: showDownloadProgress,
          options: Options(responseType: ResponseType.bytes,followRedirects: false,
          ));
      file.writeAsBytesSync(response.data);
      return file;
    } catch (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,required int size,bool isBold = false,int line = 1}) {
  return Text(text,style: TextStyle(fontSize: zsp(size),color: color,decoration: TextDecoration.none,
    fontWeight: isBold?FontWeight.bold:FontWeight.normal,),maxLines: line,overflow: TextOverflow.ellipsis,);
}