我正在开发一个应用程序，从服务器下载一个较新的APK文件。下载到存储工作正常，现在它应该在没有用户交互的情况下更新。
我已经阅读了所有关于Android，Xamarin和StackOverflow上类似问题的文档。但我不能让它像预期的那样工作。没有安装意图，也没有来自源代码的异常，应用程序只是继续运行。你知道我错过了什么吗
MainActivity.cs

public bool Install(string filePath)
{
    Java.IO.File file = new Java.IO.File(filePath);
    if (!file.Exists())
    {
        return false;
    }

    // please allow permission for package install
    if (!global::Android.App.Application.Context.PackageManager.CanRequestPackageInstalls())
    {
        var intent = new Intent();
        intent.SetAction(global::Android.Provider.Settings.ActionManageUnknownAppSources);
        intent.SetData(global::Android.Net.Uri.Parse("package:" + global::Android.App.Application.Context.PackageName));
        StartActivity(intent);
    }

    try
    {
        // Android 10.x and newer
        if (Build.VERSION.SdkInt >= BuildVersionCodes.Q)
        {
            global::Android.Net.Uri uri = FileProvider.GetUriForFile(global::Android.App.Application.Context, global::Android.App.Application.Context.PackageName.ToString() + ".provider", file);
            InstallPackageAndroidQAndAbove(file.AbsolutePath, uri);
        }

        // omitted older Android versions, working
        else if (Build.VERSION.SdkInt >= BuildVersionCodes.N) { }
        else { }
    }
    catch (Exception e)
    {
        return false;
    }
    return true;
}

public void InstallPackageAndroidQAndAbove(string filePath, global::Android.Net.Uri apkUri)
{
    var packageInstaller = global::Android.App.Application.Context.PackageManager.PackageInstaller;
    var sessionParams = new PackageInstaller.SessionParams(PackageInstallMode.FullInstall);
    sessionParams.SetAppPackageName(global::Android.App.Application.Context.PackageName);
    if (Build.VERSION.SdkInt >= BuildVersionCodes.S)
    {
        sessionParams.SetRequireUserAction( (int)global::Android.Content.PM.PackageInstallUserAction.NotRequired );
    }
    if (Build.VERSION.SdkInt >= BuildVersionCodes.Tiramisu)
    {
        sessionParams.SetPackageSource((int)global::Android.Content.PM.PackageSource.LocalFile);
    }

    int sessionId = packageInstaller.CreateSession(sessionParams);
    var session = packageInstaller.OpenSession(sessionId);

    AddApkToInstallSession(filePath, session);
          
    // Create an install status receiver.
    var intent = new Intent(this, this.Class);
    intent.SetAction(Intent.ActionInstallPackage);
    intent.SetData(apkUri);
    intent.AddFlags(ActivityFlags.NewTask | ActivityFlags.NoHistory | ActivityFlags.ExcludeFromRecents | ActivityFlags.GrantReadUriPermission);
    global::Android.App.Application.Context.StartActivity(intent);

    var pendingIntent = PendingIntent.GetActivity(global::Android.App.Application.Context, 0, intent, PendingIntentFlags.UpdateCurrent | PendingIntentFlags.Immutable);
    var observer = new PackageInstallObserver(packageInstaller);
    observer.InstallFailed += OnInstallFailed;
    packageInstaller.RegisterSessionCallback(observer);
    global::Android.App.Application.Context.SendBroadcast(intent);

    // Commit the session (this will start the installation workflow).
    // -> But nothing happens here, there is no intent on my device, 
    // -> observer does not handle InstallFailed, and no exception is thrown
    session.Commit(pendingIntent.IntentSender);      
}
        
                
private async static void AddApkToInstallSession(string filePath, PackageInstaller.Session session)
{
    using (var input = new FileStream(filePath, FileMode.Open, FileAccess.Read))
    {
        using (var packageInSession = session.OpenWrite("com.Westfalia.Savanna.CrossClient", 0, -1))
        {
            await input.CopyToAsync(packageInSession);
            packageInSession.Close();
        }
        input.Close();
    }

    GC.Collect();
    GC.WaitForPendingFinalizers();
    GC.Collect();
}
        
private void OnInstallFailed(object sender, EventArgs e)
{
    throw new NotImplementedException();
}

具有AndroidManifest.xml中的权限

• 安装包安装包
• 读取外部存储
• 请求删除_包
• 请求安装包
• RESTARTPackages
• 无用户操作的数据包

我在三星和霍尼韦尔的真实的设备上测试了Android > 10。
我期望安装意图和重新启动正在运行的应用程序。