Xamarin Android在复制apk文件时卡在黑屏上，但如果将USB连接到手机并从那里运行，则可以正常使用

如何解决Xamarin Android在复制apk文件时卡在黑屏上，但如果将USB连接到手机并从那里运行，则可以正常使用

这里是我启动应用程序时运行的代码：

 protected override async void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            Xamarin.Essentials.Platform.Init(this,savedInstanceState);
            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.activity_main);
            Button SearchRareButtonClick = FindViewById<Button>(Resource.Id.SearchRareButton);
            ProgressBar SearchProgressBar = FindViewById<ProgressBar>(Resource.Id.SearchingProgressBar);
            TextView DetectedRareLabel = FindViewById<TextView>(Resource.Id.DetectedRareBusLabel);
            TextView StatusLabel = FindViewById<TextView>(Resource.Id.StatusLabel);
            SearchRareButtonClick.Click += async (sender,args) =>
            {
                SearchRareButtonClick.Enabled = false;
                if (await SendRareRequest() == true)
                {
                    string RequestRecieved = "false";
                    while (RequestRecieved == "false")
                    {
                        RequestRecieved = await DownloadStringFromFTP("ftp://ftpupload.net/htdocs/NextBus/RequestRecieved.txt");
                        await Task.Delay(10);
                    }

                    var i = Int32.Parse(
                        await DownloadStringFromFTP("ftp://ftpupload.net/htdocs/NextBus/ProgressBarMaximum.txt"));
                    SearchProgressBar.Max = i;
                    string DoneState = "false";
                    while (DoneState == "false")
                    {
                        DoneState = await DownloadStringFromFTP("ftp://ftpupload.net/htdocs/NextBus/Done.txt");
                        StatusLabel.Text = await DownloadStringFromFTP("ftp://ftpupload.net/htdocs/NextBus/StatusLabel.txt");
                        try
                        {
                            SearchProgressBar.Progress =
                                Int32.Parse(
                                    await DownloadStringFromFTP("ftp://ftpupload.net/htdocs/NextBus/Progress.txt"));
                        }
                        catch
                        {

                        }

                        await Task.Delay(10);
                    }

                    SearchProgressBar.Progress = 0;
                    DetectedRareLabel.Text = "Detected Rare Buses:\n" +
                                             await DownloadStringFromFTP(
                                                 "ftp://ftpupload.net/htdocs/NextBus/RarePasser.txt");
                }
                else
                {
                    SearchRareButtonClick.Text = "Server busy...";
                    await Task.Delay(2000);
                    SearchRareButtonClick.Text = "Search entire ttc for rare buses";
                }

                SearchRareButtonClick.Enabled = true;
            };

        }
        public override void OnRequestPermissionsResult(int requestCode,string[] permissions,[GeneratedEnum] Android.Content.PM.Permission[] grantResults)
        {
            Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode,permissions,grantResults);

            base.OnRequestPermissionsResult(requestCode,grantResults);
        }

        private async Task DownloadFromFTP(string link,string filename)
        {
            using (var client = new WebClient())
            {
                client.Credentials = new NetworkCredential(FTPUsername,FTPPassword);
                client.DownloadFileAsync(new Uri(link),filename);
                while (client.IsBusy)
                {
                    await Task.Delay(10);
                }
            }
        }

        private async Task UploadToFTP(string link,FTPPassword);
                client.UploadFileAsync(new Uri(link),filename);
                while (client.IsBusy)
                {
                    await Task.Delay(10);
                }
            }
        }

        private async Task<string> DownloadStringFromFTP(string link)
        {
            string Return = "";
            using (var client = new WebClient())
            {
                client.Credentials = new NetworkCredential(FTPUsername,FTPPassword);
                Return = client.DownloadString(new Uri(link));
                while (client.IsBusy)
                {
                    await Task.Delay(10);
                }
            }

            return Return;
        }
        private async Task UploadStringToFTP(string link,string content)
        {
            using (var client = new WebClient())
            {
                client.Credentials = new NetworkCredential(FTPUsername,FTPPassword);
                client.UploadString(new Uri(link),content);
                while (client.IsBusy)
                {
                    await Task.Delay(10);
                }
            }
        }

        private async Task<bool> SendRareRequest()
        {
            bool Return = false;
            string State = await DownloadStringFromFTP("ftp://ftpupload.net/htdocs/NextBus/StartProcess.txt");
            if (State == "false")
            {
                await UploadStringToFTP("ftp://ftpupload.net/htdocs/NextBus/StartProcess.txt","true");
                Return = true;
            }
            else if (State == "true")
            {
                Return = false;
            }

            return Return;
        }

当我复制通过Visual Studio分发的apk文件时，它有时会立即崩溃，有时会永远显示空白屏幕，但是当我将手机连接到USB并通过USB调试进行操作时，它无需任何操作问题，是否需要更改任何设置才能使其正常工作？Visual Studio是否存在问题？