思路

• 服务端提供版本信息和apk下载地址
• 客户端通过对比版本进行文件下载安装升级

客户端

权限清单（AndroidManifest.xml）

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0.2" package="com.companyname.boshiac.forklift.app" android:installLocation="auto"><uses-sdk android:minSdkVersion="29" android:targetSdkVersion="33" /><application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme" android:usesCleartextTraffic="true"><provider android:name="androidx.core.content.FileProvider" android:authorities="com.companyname.boshiac.forklift.app.fileprovider" android:exported="false" android:grantUriPermissions="true"><meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/provider_paths" /></provider></application><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.RECORD_AUDIO" /><uses-permission android:name="android.permission.CAPTURE_AUDIO_OUTPUT" /><uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" /><uses-permission android:name="android.permission.READ_MEDIA_AUDIO" /><uses-permission android:name="android.permission.DELETE_CACHE_FILES" /><uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" /><uses-permission android:name="android.permission.INTERNET" />
</manifest>

权限列表(完整内容看 权限清单（AndroidManifest.xml））

安装权限、文件读写权限等都是必要的权限

	<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" /><uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

打开外部应用的权限(完整内容看 权限清单（AndroidManifest.xml））

在application节点中加入下面代码

<provider android:name="androidx.core.content.FileProvider" android:authorities="com.companyname.boshiac.forklift.app.fileprovider" android:exported="false" android:grantUriPermissions="true"><meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/provider_paths" /></provider>

添加文件如下图

provider_paths.xml内容

根据自己的权限需要开放对应的目录权限就可以了

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android"><!--1、对应内部内存卡根目录：Context.getFileDir()--><files-pathname="int_root"path="/" /><!--2、对应应用默认缓存根目录：Context.getCacheDir()--><cache-pathname="app_cache"path="/" /><!--3、对应外部内存卡根目录：Environment.getExternalStorageDirectory()--><external-pathname="ext_root"path="pictures/" /><!--4、对应外部内存卡根目录下的APP公共目录：Context.getExternalFileDir(String)--><external-files-pathname="ext_pub"path="/" /><!--5、对应外部内存卡根目录下的APP缓存目录：Context.getExternalCacheDir()--><external-cache-pathname="ext_cache"path="/" /></paths>

升级类库代码

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;namespace BOSHIAC.Forklift.App
{internal class UpgradeService{private string apkUrl;private string versionUrl;private string version;/// <summary>/// 更新了/// </summary>public event Action<string> UpgradeEvent;public UpgradeService(string versionUrl, string apkUrl, string currentVersion){this.versionUrl = versionUrl;this.apkUrl = apkUrl;version = currentVersion;}public void Start(){Task.Run(async () =>{var client = new HttpClient();while (true){try{var response = await client.GetAsync(versionUrl);var hostVersion = response.Content.ReadAsStringAsync().Result;if (hostVersion != version){using (var stream = client.GetStreamAsync(apkUrl).Result){var downloaddir = Application.Context.GetExternalFilesDir(Android.OS.Environment.DirectoryDownloads).AbsolutePath;var fileName = Path.Combine(downloaddir, "forklift.apk");if (File.Exists(fileName))File.Delete(fileName);using (var fs = new FileStream(fileName, FileMode.CreateNew)){stream.CopyTo(fs);fs.Flush();UpgradeEvent?.Invoke(fileName);return;}}}}catch (Exception ex){throw;}finally{Task.Delay(TimeSpan.FromSeconds(30)).Wait();}}});}}
}

调用代码

 UpgradeService service = new UpgradeService("http://192.168.69.82/api/Upgrade/Version", "http://192.168.69.82/apks/forklift.apk", this.PackageManager.GetPackageInfo(this.PackageName, 0).VersionName);service.UpgradeEvent += Service_UpgradeEvent;service.Start();

事件回调

  private void Service_UpgradeEvent(string file){this.RunOnUiThread(() =>{// var f = this.PackageManager.CanRequestPackageInstalls();//  this.GetPackageManager().canRequestPackageInstalls();var alertDialog = new Android.App.AlertDialog.Builder(this).SetTitle("升级提示").SetMessage("检测到新的版本，必须升级哦！").SetIcon(Resource.Mipmap.ic_launcher).SetPositiveButton("升级", (des, dee) =>{try{Intent install = new Intent(Intent.ActionView);Java.IO.File fileName = new Java.IO.File(file);Android.Net.Uri uri = FileProvider.GetUriForFile(Android.App.Application.Context, "com.companyname.boshiac.forklift.app.fileprovider", fileName) ;//打开新版本应用的 install.SetFlags(ActivityFlags.NewTask);install.SetFlags(ActivityFlags.GrantReadUriPermission);install.SetDataAndType(uri, "application/vnd.android.package-archive");// "application/vnd.android.package-archive"StartActivity(install);}catch (System.Exception ex){;}}).SetCancelable(false).Create();alertDialog.Show();});}

注意：这里是安卓11，因为是已经确定版本了，所以没做判断，正确做法应该如下

  Intent i = new Intent(Intent.ActionView);var saveFolder = Android.OS.Environment.ExternalStorageDirectory;var file = string.Format("{0}/{1}{2}", saveFolder, this.PackageName, ".apk");Java.IO.File apkFile = new Java.IO.File(file);Intent intent = new Intent(Intent.ActionView);intent.SetFlags(ActivityFlags.NewTask);if (Build.VERSION.SdkInt >= BuildVersionCodes.N){intent.SetFlags(ActivityFlags.GrantReadUriPermission);Android.Net.Uri uri = FileProvider.GetUriForFile(this, PackageName + ".fileprovider", apkFile);intent.SetDataAndType(uri, "application/vnd.android.package-archive");}else{intent.SetDataAndType(Android.Net.Uri.FromFile(new Java.IO.File(file)), "application/vnd.android.package-archive");}StartActivity(intent);

https://blog.csdn.net/qq_38977099/article/details/119115061

服务端接口

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using System.IO;namespace Boshi_HaiNan_Pda.WebApi.Controllers
{[Route("api/[controller]")][ApiController]public class UpgradeController : ControllerBase{private IWebHostEnvironment environment;private string versionJsonPath;public UpgradeController(IWebHostEnvironment hostingEnvironment){environment = hostingEnvironment;var dir = System.IO.Path.Combine(environment.WebRootPath, "apks\\");if (!Directory.Exists(dir)) Directory.CreateDirectory(dir);versionJsonPath = System.IO.Path.Combine(dir, "version.json"); }[HttpGet("Version")]public string GetVersion(){if (!System.IO.File.Exists(versionJsonPath))return "0.0.0";return System.IO.File.ReadAllText(versionJsonPath).ToLower();} }
}

注意事项：在iis中或者.netcore中下载apk配置方式不一样

在iis中配置网络上有很多文章，都是配置mime，”application/vnd.android.package-archive“ 这个是没有问题的，如下配置

在.netcore中需要做如下配置
program.cs 或者startup文件中增加如下代码

 app.UseStaticFiles(new StaticFileOptions{//FileProvider = new PhysicalFileProvider(Directory.GetCurrentDirectory()),//设置不限制content-type 该设置可以下载所有类型的文件，但是不建议这么设置，因为不安全//下面设置可以下载apk和nupkg类型的文件ContentTypeProvider = new FileExtensionContentTypeProvider(new Dictionary<string, string>{{ ".apk", "application/vnd.android.package-archive" }})}).UseStaticFiles();

完整代码

https://download.csdn.net/download/iml6yu/87463366