flutter 安卓app 应用内升级

安卓app应用内升级demo

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1、使用 package_info 获取本地版本信息,然后与线上版本对比,看是否需要更新

import 'package:package_info/package_info.dart';

//获取当前版本
PackageInfo packageInfo = await PackageInfo.fromPlatform();
String version = packageInfo.version;

2、使用 permission_handler 来获取读写权限

import 'package:permission_handler/permission_handler.dart';

///检查是否有权限
checkPermission() async {
    //检查是否已有读写内存权限
    PermissionStatus status = await PermissionHandler().checkPermissionStatus(PermissionGroup.storage);

    //判断如果还没拥有读写权限就申请获取权限
    if(status != PermissionStatus.granted){
      var map = await PermissionHandler().requestPermissions([PermissionGroup.storage]);
      if(map[PermissionGroup.stoßrage] != PermissionStatus.granted){
        return false;
      }
    }
}

3、使用 flutter_downloader 下载最新版本的安装包

import 'package:flutter_downloader/flutter_downloader.dart';

 /// 下载
Future executeDownload(String url) async {
    final path = await BackUpdate()._apkLocalPath();

    //发起请求
    final taskId = await FlutterDownloader.enqueue(
        url: url,
        fileName: 'update.apk',
        savedDir: path,
        showNotification: false,
        openFileFromNotification: false);

    FlutterDownloader.registerCallback((id, status, progress) {
      //更新下载进度
      setState(() => this.progress = progress);

      // 当下载完成时，调用安装
      if (taskId == id && status == DownloadTaskStatus.complete) {
        //关闭更新进度框
        Navigator.of(context).pop();
        //安装下载完的apk
        BackUpdate()._installApk();
      }
    });

  return taskId;
}

4、使用 install_plugin 打开下载好的安装包

import 'package:install_plugin/install_plugin.dart';

/// 安装
Future _installApk() async {
    try {
      final path = await _apkLocalPath();

      //这里使用的包名要跟/android/app/build.gradle 里面的applicationId一致
      InstallPlugin.installApk(path + '/update.apk', 'com.example.app_update_demo') 
          .then((result) {
        print('install apk $result');
      }).catchError((error) {
        print('install apk error: $error');
      });
    } on PlatformException catch (_) {}
}

完整代码: 安卓app应用内升级demo

原文地址：https://www.hehuapei.com/flutter-andriod-app-update/index.html