C# Xamarin Recieve and Display image from Stream Byte Array with TCP Sockets

Question

I am currently working on a project that I send an Image through TCP using sockets from a WinForm Application to a Xamarin Android App in the same network .

我已經使用客戶端（也是 Winforms）測試了服務器（ WinForms ）代碼並管理它工作。 但是問題來了，當我在 Xamarin 中為 Android 客戶端編碼時，我發現我不能以同樣的方式使用 Bitmap，所以我試圖尋找其他方式。

問題在於 android 客戶端代碼。 我在調試中檢查了圖像字節從服務器 - >客戶端全部通過。

在 Android 客戶端上：如果我刪除while loop並開始使用發送按鈕（服務器）和連接按鈕（客戶端）播放一些圖像在客戶端顯示。 這很奇怪

我不是這些問題的專家，因此請隨時提出任何更正建議

我使用的代碼

我的WinForms 服務器中的代碼是這樣的。

private void StartServer_Click(object sender, EventArgs e)
     {
         IPEndPoint iep = new IPEndPoint(IPAddress.Parse("192.168.1.2"), 9999);
         Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
         server.Bind(iep);
         server.Listen(100);
         Console.WriteLine("Waiting for client....");
         client = server.Accept();
     }
     private void SendImage_Click(object sender, EventArgs e)
     {
         Bitmap bmp = TakingScreenshotEx1(); // method for taking screenshot
         bmp.Save("1.jpeg", ImageFormat.Jpeg); // the name of the screenshot taken, just before 
    
         byte[] buffer = ReadImageFile("1.jpeg"); // read the saved image file 
         int v = client.Send(buffer, buffer.Length, SocketFlags.None); // send the image 
         Console.WriteLine("Image SENT!");
     }

我的WinForms 客戶端（新手但工作方法）

 IPEndPoint iep = new IPEndPoint(IPAddress.Parse("192.168.1.2"), 9999);
     Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
     byte[] buffer = new byte[1000000];
    
     private async void Connect_Click(object sender, EventArgs e)
     {  
        if(client.Connected != true)
         client.Connect(iep);
    
         await Task.Run(() => DoSomethingLong());
     }
    private async void DoSomethingLong()
     {
         while (true)
         {
             int v = client.Receive(buffer, buffer.Length, SocketFlags.None);
             Console.WriteLine("Data Received!");
    
             Stream stream = new MemoryStream(buffer);
             var img = Bitmap.FromStream(stream);
             pictureBox1.Image = img;
         }
     }

有問題的Android 客戶端

     IPEndPoint iep = new IPEndPoint(IPAddress.Parse("192.168.1.2"), 9999);
     Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
     byte[] buffer = new byte[1000000];
     private async void Connect_Clicked(object sender, EventArgs e)
     {
         if (client.Connected != true)
             client.Connect(iep);

         await Task.Run(() => DoSomethingLong());
     }
     public Xamarin.Forms.ImageSource PhotoStream { get; set; }
     private async void DoSomethingLong()
     {

         while(true){
             int v = client.Receive(buffer, buffer.Length, SocketFlags.None);
                 Console.WriteLine("Data Received!");
                 Stream stream = new MemoryStream(buffer);
                if (stream != null)
                     imgXam.Source = ImageSource.FromStream(() => stream);
         }
}

Answer 1

解決了

遵循@Jason的建議並將Invoke Method放入Timer中。 我能夠解決問題

 Device.StartTimer(TimeSpan.FromMilliseconds(500), () =>
        {
            // called every 1 second

            MainThread.BeginInvokeOnMainThread(() =>
            {

            });
            
            return true; // return true to repeat counting, false to stop timer
            
        });