UDP-Connections within the emul

最新推荐文章于 2022-01-19 15:27:20 发布

最新推荐文章于 2022-01-19 15:27:20 发布 · 68 阅读

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本文介绍了一个简单的UDP连接示例，包括客户端和服务端的实现。通过该示例，演示了如何在两个UDP连接间发送数据，并展示了相关的Java代码。

Hello Guys,

TCP seems to be a kind of problem !

For now I succeeded, to send data between two UDP-Connections within the emulator. The Log:

Java:

D/UDP(1515): S: Connecting... 
D/UDP(1515): S: Receiving... 
D/UDP(1515): C: Connecting... 
D/UDP(1515): C: Sending: 'Hello from Client' 
D/UDP(1515): S: Received: 'Hello from Client' 
D/UDP(1515): S: Done. 
D/UDP(1515): C: Sent. 
D/UDP(1515): C: Done.

I'll have a look for some working TCP-Stuff Exclamation

The code below will be put into an tutorial right now.

Java:

public class UDPConnection extends Activity { 
/** Called when the activity is first created. */ 
  @Override 
public void onCreate(Bundle icicle) { 
super.onCreate(icicle); 
    setContentView(R.layout.main); 

Thread sThread = new Thread(new Server()); 
Thread cThread = new Thread(new Client()); 

    sThread.start(); 
try { 
Thread.sleep(500); 
} catch (InterruptedException e) { } 

    cThread.start(); 
} 
}

Java:

public class Server implements Runnable{ 
public static final String SERVERIP = "127.0.0.1"; 
public static final int SERVERPORT = 4444; 

  @Override 
public void run() { 
try { 
      Log.d("UDP", "S: Connecting..."); 
InetAddress serverAddr = InetAddress.getByName(SERVERIP); 
DatagramSocket socket = new DatagramSocket(SERVERPORT,serverAddr); 
byte[] buf = new byte[17]; 
DatagramPacket packet = new DatagramPacket(buf, buf.length); 
      Log.d("UDP", "S: Receiving..."); 
      socket.receive(packet); 
      Log.d("UDP", "S: Received: '" + new String(packet.getData()) + "'"); 
      Log.d("UDP", "S: Done."); 
} catch (Exception e) { 
      Log.e("UDP", "S: Error", e); 
} 
} 
}

Java:

public class Client implements Runnable { 
  @Override 
public void run() { 
try { 
      Log.d("UDP", "C: Connecting..."); 
DatagramSocket socket = new DatagramSocket(); 
byte[] buf = ("Hello from Client").getBytes(); 
InetAddress serverAddr = InetAddress.getByName(Server.SERVERIP); 
DatagramPacket packet = new DatagramPacket(buf, buf.length,serverAddr, Server.SERVERPORT); 
      Log.d("UDP", "C: Sending: '" + new String(buf) + "'"); 
      socket.send(packet); 
      Log.d("UDP", "C: Sent."); 
      Log.d("UDP", "C: Done."); 
} catch (Exception e) { 
      Log.e("UDP", "C: Error", e); 
} 
} 
}

Regards,
plusminus