Flutter 实现 App 内更新安装包,kotlin评价

  1. 获取当前app的版本、平台信息

static String _version; static String _flatform;

import ‘package:package_info/package_info.dart’;

/// 获取当前版本

PackageInfo packageInfo = await PackageInfo.fromPlatform();

_version = packageInfo.version;

import ‘package:device_info/device_info.dart’;

/// 获取平台信息

Future getFlatForm() async {

if (Platform.isAndroid) {

_flatform = ‘android’;

} else {

_flatform = ‘ios’;

}

return _flatform;

}

  1. 从服务Flutter 实现 App 内更新安装包,kotlin评价
    器拉取app版本的最新信息

Map _data = await _fetchVersionInfo();

/// 拉取版本号信息

Future _fetchVersionInfo() async {

HttpResult res = await Api.get(’/version-api/versions/latest’, query: {

‘from’: _flatform,

‘version’: _version,

});

return res.code == 200 ? res.data : null;

}

  1. 与本地version信息比对,选择是否展示更新弹窗,我们采用的是event_bus触发

if (localVersion == remoteVersion) return;eventManager.eventBus.fire(new UpdateAppEvent(versionInfo));

  1. 进行版本升级,要注意区分Android与IOS (1) IOS更新app包

IOS的处理方式比较简单,直接跳转到appStore即可,我这里采用的urlLauncher直接跳转

urlLauncher.launch(_link);

(2) Android更新app包

需要开启存储权限,如果没有权限就申请

import ‘package:permission_handler/permission_handler.dart’;

/// 检查是否有权限,用于安卓

Future checkPermission() async {

if (_flatform == ‘android’) {

PermissionStatus permission = await PermissionHandler()

.checkPermissionStatus(PermissionGroup.storage);

if (permission != PermissionStatus.granted) {

Map<PermissionGroup, PermissionStatus> permissions =

await PermissionHandler()

.requestPermissions([PermissionGroup.storage]);

if (permissions[PermissionGroup.storage] == PermissionStatus.granted) {

return true;

}

} else {

return true;

}

} else {

return true;

}

return false;

}

需要在Android的 AndroidManifest.xml文件增加权限配置

下载apk根据返回的下载链接,需要先把Android包文件下载到本地,这里需要对文件流进行操作,下载工具我是采用的HTTP请求工具库dio,这里也可以采用专业的下载插件flutter_downloader,这个插件支持Android、IOS下载,但是配置起来复杂,我折腾了好长时间,也没能配置成功,有玩转这个插件的可以给我推荐些文章。

import ‘package:dio/dio.dart’;

import ‘package:path_provider/path_provider.dart’;

/// 下载安卓更新包

Future downloadAndroid(String url) async {

/// 创建存储文件

Directory storageDir = await getExternalStorageDirectory();

String storagePath = storageDir.path;

File file = new File(’ s t o r a g e P a t h / storagePath/ storagePath/{Config.APP_NAME}v${_version}.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) {

print(e);

}

}

安装apk

import ‘package:install_plugin/install_plugin.dart’;

/// 安装apk

Future installApk(String url) async {

File _apkFile = await downloadAndroid(url);

String _apkFilePath = _apkFile.path;

if (_apkFilePath.isEmpty) {
;

}

}

安装apk

import ‘package:install_plugin/install_plugin.dart’;

/// 安装apk

Future installApk(String url) async {

File _apkFile = await downloadAndroid(url);

String _apkFilePath = _apkFile.path;

if (_apkFilePath.isEmpty) {

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