【flutter】安卓应用内升级

提供两种方法
1.Dio下载升级

import 'package:permission_handler/permission_handler.dart';
import 'package:dio/dio.dart';
import 'package:path_provider/path_provider.dart';
import 'package:open_file/open_file.dart';

 /// 下载安卓更新包
  Future<String> downloadAndroid(String url) async {
    final permissions = await Permission.storage.status;
    print('permission $permissions');
    if (!permissions.isGranted) {
      final permission = await Permission.storage.request();
      print('permission $permission');
    } else {
      print('permission granted');
    }

    startDownLoad(url);
  }

///开始下载
  startDownLoad(String url) async{
    /// 创建存储文件
    print(url);
    Directory storageDir = await getTemporaryDirectory();
    String storagePath = storageDir.path;
    final path = storagePath + '/xxx.apk';
    try {
      var dio = Dio();
//配置dio代理 方便debug
      // (dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate = (client) {
      //   client.badCertificateCallback =
      //       (X509Certificate cert, String host, int port) {
      //     return Platform.isAndroid;
      //   };
      //   client.findProxy = (uri) {
      //     return "PROXY 192.168.0.154:8888";
      //   };
      // };
      final Response response =  await dio.download(url, path, onReceiveProgress: (int count, int total) {
        if (total == -1) {
          progressValue = 0.01;
        } else {
          progressValue = count / total.toDouble();
        }
        print('progress: $progressValue');
        setState(() {});
        if (progressValue == 1) {
          //下载完成，跳转到程序安装界面
          openApk(path);
        }
      });
      print(response.data);

    } catch (e) {
      print('$e');
      progressValue = 0;
    }
  }

//打开apk 开始安装
  openApk(String path) async {
    final openResult = await OpenFile.open(path);
    print('openResult:${openResult.type}');
    if (openResult.type == ResultType.error) {
    } else if (openResult.type == ResultType.permissionDenied) {
    } else if (openResult.type == ResultType.fileNotFound) {
    } else if (openResult.type == ResultType.noAppToOpen) {
    } else {
      if (widget.forceUpdate) Navigator.pop(context);
      print('open result done');
    }
  }

2.使用ota库升级
ota_update

try {
  //LINK CONTAINS APK OF FLUTTER HELLO WORLD FROM FLUTTER SDK EXAMPLES

  OtaUpdate()
      .execute(
    widget.loadingUrl,
    // OPTIONAL
    destinationFilename: 'xxx.apk',
    //OPTIONAL, ANDROID ONLY - ABILITY TO VALIDATE CHECKSUM OF FILE:
    // sha256checksum: "********************",
  ).listen(
        (OtaEvent event) {
          print(event.status);
          print(event.value);
          setState(() {
            progressValue = stringToInt(event.value)/100;
          });
    },
  );
} catch (e) {
  print('Failed to make OTA update. Details: $e');
}