從機器人發送字符串到Visual Basic 2010

Question

我想從Android的字符串發送到我的電腦（Visual Basic中2010）我嘗試這一個，但它不工作。請人幫助我..

我從拿到我的Android代碼： http://thinkandroid.wordpress.com/2010/03/27/incorporating-socket-programming-into-your-applications/

而且它的樣子：

package com.zelacroix.bukumenu; 
import java.io.*; 
import java.net.*; 
import android.app.Activity; 
import android.os.*; 
import android.util.*; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.*; 
public class TesKirim extends Activity { 

     private EditText serverIp; 

     private Button connectPhones; 

     private String serverIpAddress = "192.168.1.2"; 

     private boolean connected = false; 

     private Handler handler = new Handler(); 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.teskirim); 

      serverIp = (EditText) findViewById(R.id.server_ip); 
      connectPhones = (Button) findViewById(R.id.connect_phones); 

      connectPhones.setOnClickListener(new OnClickListener() { 
      @Override 
       public void onClick(View v) { 
        if (!connected) { 
         serverIpAddress = serverIp.getText().toString(); 
         if (!serverIpAddress.equals("")) { 
          Thread cThread = new Thread(new ClientThread()); 
          Toast.makeText(getApplicationContext(), 
               "masuk if", 
               10) 
           .show(); 
          cThread.start(); 
         } 
        } 
       } 
      }); 
     }; 

     public class ClientThread implements Runnable { 
      public void run() { 
       try { 
        InetAddress serverAddr = 
         InetAddress.getByName(serverIpAddress); 
        Log.d("ClientActivity", "C: Connecting..."); 
        Socket socket = new Socket(serverAddr , 10000); 
        connected = true; 
        while (connected) { 
         try { 
          Log.d("ClientActivity", "C: Sending command."); 
          PrintWriter out = 
           new PrintWriter(
            new BufferedWriter(
             new OutputStreamWriter(
              socket.getOutputStream())), 
            true); 

           // where you issue the commands 
           out.println("Hey Server!"); 
           Log.d("ClientActivity", "C: Sent."); 
         } catch (Exception e) { 
          Log.e("ClientActivity", "S: Error", e); 
         } 
        } 
        socket.close(); 
        Log.d("ClientActivity", "C: Closed."); 
       } catch (Exception e) { 
        Log.e("ClientActivity", "C: Error", e); 
        connected = false; 
       } 
      } 
     }; 
}; 

我的Visual Basic中使用UDP方法。而它的樣子：

Imports System.Net.Sockets 
Imports System.Net 
Imports System.IO 
Imports System.Text 

Public Class Form1 
    Private Sub Button1_Click(ByVal sender As System.Object, 
           ByVal e As System.EventArgs) Handles Button1.Click 
     Try 
      Dim udp_Client As New UdpClient(10000) 

      Dim remoteIpEndPoint As New IPEndPoint(IPAddress.Any, 0) 

      Dim receiveBytes As [Byte]() = udp_Client.Receive(remoteIpEndPoint) 
      Dim returnData As String = Encoding.ASCII.GetString(receiveBytes) 
      ListBox1.Items.Add(returnData.ToString) 
      udp_Client.Close() 
     Catch ex As Exception 
      ListBox1.Items.Add(ex.ToString()) 
     End Try 
    End Sub 
End Class 

請我really2需要comunicate他們..

Answer 1

我認爲問題是由於您正在混合TCP和UDP通信而引起的。 Visual Basic應用程序期望通過UDP接收數據，並且Android應用程序通過TCP進行發送。我從你的代碼創建了Android和VB項目，並從Android應用程序調用UDP發送函數，通信工作正常。來自Android的字符串在VB應用程序的列表框中正確顯示。嘗試使用您的Android應用UDP套接字如下：

private void udp_send(String serverIpAddress) throws IOException 
     { 
      String messageStr="Hello Android!"; 
      int server_port = 10000; 
      DatagramSocket s = new DatagramSocket(); 
      InetAddress local = InetAddress.getByName(serverIpAddress); 
      int msg_length=messageStr.length(); 
      byte[] message = messageStr.getBytes(); 
      DatagramPacket p = new DatagramPacket(message, msg_length,local,server_port); 
      s.send(p); 
     } 

[我試圖在Android模擬器，並在同一臺機器上運行的應用VB這個代碼。如果您嘗試跨不同的計算機並且仍然面臨上述代碼的問題，請確保端口10000的udp通信未被某些防火牆阻止。您可以從Android應用給予詳細異常日誌對我們來說更好，如果有必要理解問題]