String +DatagramPacket+ Android + Arduino

what I want to do is, if I use send.setOnClickListener(new OnClickListener) to send stringdata1 + stringdata1 over the DatagramSocket to an Arduino Board, but I don´t know how to convert the two Strings and send them
please help me
thanks in Advance
////////////////////////////////////////////////////////////
Code 1
////////////////////////////////////////////////////////////

Code :

---

send.setOnClickListener(new OnClickListener() {
 
			public void onClick(View v) {
					SendSlcValue.setintData();
					SendSlcValue.updateArduinoValues();
					;

---

////////////////////////////////////////////////////////////
Code 2
////////////////////////////////////////////////////////////

Code :

---

public class SendSlcValue {
	static DatagramSocket socket;
	  static byte data[];
 
	  static {
	    data = new byte[700];
	    try {
	      socket = new DatagramSocket();
	    } catch (SocketException e1) {
	      e1.printStackTrace();
	    }
	  }
 
	  public static void updateArduinoValues() {
	    Thread t = new Thread(new Runnable() {
 
	      @Override
	      public void run() {
	        try {
	          InetAddress serverIP = InetAddress
	              .getByName("255.255.255.255");
 
	          DatagramPacket out = new DatagramPacket(data, data.length,
	              serverIP, 50025);
 
	          socket.send(out);
	        } catch (IOException e) {
	          e.printStackTrace();
	        }
 
	      }
	    });
	    t.start();
	  }
 
	  public static void setintData(byte val_onoff) {
 
 
 
 
		    String stringdata1 = "0020 0020";
		    byte[] byteData1 = stringdata1.getBytes();
 
                    String stringdata2 = "0000 0071 0000 000c 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0040 0020 0020 0020 0020 0020 0020 0040 0020 0020 0040 0020 0ca0";
		    byte[] byteData2 = stringdata2.getBytes();

---

Quote:

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how to convert the two Strings

---

Can you explain what the problem is? The byte arrays can go in a DatagramPacket for sending.

if I send the byteData1 instead of data I don`t see anything on the arduino Serial Monitor
but if I use this code
////////////////////
Code 1
////////////////////

Code :

---

public class MainActivity extends Activity {
	public Button send; 
	public TextView tv;
	public TextView etcode;
	String test = new String("test");
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		send = (Button) findViewById(R.id.Senden);
 
 
 
		////////////////////////////
		send.setOnClickListener(new OnClickListener() {
 
			public void onClick(View v) {
					SendSlcValue.setintData((byte)1);
					SendSlcValue.updateArduinoValues();
					;	
			}
		});
	}
}

---

///////////////////////
code 2
///////////////////////

Code :

---

public class SendSlcValue {
	static DatagramSocket socket;
	  static byte data[];
 
	  static {
	    data = new byte[700];
	    try {
	      socket = new DatagramSocket();
	    } catch (SocketException e1) {
	      e1.printStackTrace();
	    }
	  }
 
	  public static void updateArduinoValues() {
	    Thread t = new Thread(new Runnable() {
 
	      @Override
	      public void run() {
	        try {
	          InetAddress serverIP = InetAddress
	              .getByName("255.255.255.255");
 
	          byte[] byteData = null;
			DatagramPacket out = new DatagramPacket(byteData, data.length,
	              serverIP, 50025);
 
	          socket.send(out);
	        } catch (IOException e) {
	          e.printStackTrace();
	        }
 
	      }
	    });
	    t.start();
	  }
 
public static void setintData(byte intensity) {
		data[5] = intensity;
 
 
}

---

//////////////////////

///////////////////
I see the 6 on the arduino Serial Monitor


My Problem is I don`t know how I have to connect the stringdata1 and stringdata2 with data to see anything on the Serial Monitor

Please edit your post and wrap your code with code tags:
[code]
YOUR CODE HERE
[/code]
to get highlighting and preserve formatting.

Sorry, I don't understand the little bits of code that was posted. Too many things are not defined.