String von Gerät zu Gerät über Netzwerk übergeben - Socket

private String getLocalIpAddress() {
















        try {
            for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
                NetworkInterface intf = en.nextElement();
                for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                    InetAddress inetAddress = enumIpAddr.nextElement();
                    if (!inetAddress.isLoopbackAddress()) { 
                    	String ip = Formatter.formatIpAddress(inetAddress.hashCode());
                    	return ip; 
                    }
                }
            }
        } catch (SocketException ex) {
            Log.e("ServerActivity", ex.toString());
        }
        return null;
    }

public class MyServer extends Activity{
















	ServerSocket ss = null;
	   String mClientMsg = "";
	   Thread myCommsThread = null;
	   protected static final int MSG_ID = 0x1337;
	   public static final int SERVERPORT = 6000;




	   @Override
	   public void onCreate(Bundle savedInstanceState) {
	      super.onCreate(savedInstanceState);
	      setContentView(R.layout.my_server);
	      TextView tv = (TextView) findViewById(R.id.serverStatus);
	      tv.setText("Nothing from client yet");
	      this.myCommsThread = new Thread(new CommsThread());
	      this.myCommsThread.start();
	   }




	   @Override
	   protected void onStop() { 
	      super.onStop();
	      try {
	         // make sure you close the socket upon exiting
	         ss.close();
	      } catch (IOException e) {
	         e.printStackTrace();
	      }
	   }




	   Handler myUpdateHandler = new Handler() {
	      public void handleMessage(Message msg) {
	         switch (msg.what) {
	         case MSG_ID:
	            TextView tv = (TextView) findViewById(R.id.serverStatus);
	            tv.setText(mClientMsg);
	            break;
	         default:
	            break;
	         }
	         super.handleMessage(msg);
	      }
	   };
	   class CommsThread implements Runnable {
	      public void run() {
	         Socket s = null;
	         try {
	            ss = new ServerSocket(SERVERPORT );
	         } catch (IOException e) {
	            e.printStackTrace();
	         }
	         while (!Thread.currentThread().isInterrupted()) {
	            Message m = new Message();
	            m.what = MSG_ID;
	            try {
	               if (s == null)
	                  s = ss.accept();
	               BufferedReader input = new BufferedReader(
	                     new InputStreamReader(s.getInputStream()));
	               String st = null;
	               st = input.readLine();
	               mClientMsg = st;
	               myUpdateHandler.sendMessage(m);
	            } catch (IOException e) {
	               e.printStackTrace();
	            }
	         }
	      }
	   }
}

public class MyClient extends Activity { 
















	private Button bt;
	   private TextView tv;
	   private Socket socket;
	   private String serverIpAddress = "10.0.2.2";
	   // AND THAT'S MY DEV'T MACHINE WHERE PACKETS TO
	   // PORT 5000 GET REDIRECTED TO THE SERVER EMULATOR'S
	   // PORT 6000
	   private static final int REDIRECTED_SERVERPORT = 5000;




	   @Override
	   public void onCreate(Bundle savedInstanceState) {
	      super.onCreate(savedInstanceState);
	      setContentView(R.layout.my_client);
	      bt = (Button) findViewById(R.id.connect);
	      tv = (TextView) findViewById(R.id.inputIP);




	      try {
	         InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
	         socket = new Socket(serverAddr, REDIRECTED_SERVERPORT);
	      } catch (UnknownHostException e1) {
	         e1.printStackTrace();
	      } catch (IOException e1) {
	         e1.printStackTrace();
	      }




	      bt.setOnClickListener(new OnClickListener() {




	         public void onClick(View v) {
	            try {
	               EditText et = (EditText) findViewById(R.id.ipView);
	               String str = et.getText().toString();
	               PrintWriter out = new PrintWriter(new BufferedWriter(
	                     new OutputStreamWriter(socket.getOutputStream())),
	                     true);
	               out.println(str);
	               Log.d("Client", "Client sent message");




	            } catch (UnknownHostException e) {
	               tv.setText("Error1");
	               e.printStackTrace();
	            } catch (IOException e) {
	               tv.setText("Error2");
	               e.printStackTrace();
	            } catch (Exception e) {
	               tv.setText("Error3");
	               e.printStackTrace();
	            }
	         }
	      });
	   }
}

private String getLocalIpAddress() {
















	        try {
	            for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
	                NetworkInterface intf = en.nextElement();
	                for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
	                    InetAddress inetAddress = enumIpAddr.nextElement();
	                    if (!inetAddress.isLoopbackAddress()) { 
	                    	String ip = Formatter.formatIpAddress(inetAddress.hashCode());
	                    	return ip; 
	                    }
	                }
	            }
	        } catch (SocketException ex) {
	            Log.e("ServerActivity", ex.toString());
	        }
	        return null;
    }

ConnectivityManager connManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
















	    	NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
	    	if(mWifi.isConnected()){
	    		WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);
		    	WifiInfo wifiInfo = wifiManager.getConnectionInfo();
		    	int ipAddress = wifiInfo.getIpAddress();
		    	String wifiIp = String.format("%d.%d.%d.%d", 
		    			(ipAddress & 0xff), 
		    			(ipAddress >> 8 & 0xff), 
		    			(ipAddress >> 16 & 0xff),
		    			(ipAddress >> 24 & 0xff));
		    	
		    	if(wifiIp.length() > 0){
		    		return wifiIp;
		    	}
    	}