public boolean onTouch(View v, MotionEvent event) {
		int merker =1;
		byte[] buf = null;
		adress = (EditText) this.findViewById(R.id.IP);  
	    ip = adress.getText().toString(); 	//edittbox in string
	        		    
	    if(merker==1){
	    try {
        	InetAddress serverAddr = InetAddress.getByName(ip); //die IP vom editttext wird in einer Internetadresse umgewandelt 
			DatagramSocket socket = new DatagramSocket();
			
				if(event.getAction()==MotionEvent.ACTION_DOWN)
					{
					buf = (K1).getBytes();
					btn1.setChecked(true);
					}
				if(event.getAction()==MotionEvent.ACTION_UP)
					{
					buf = (K1).getBytes();
					}
				
				DatagramPacket packet = new DatagramPacket(buf, buf.length,	serverAddr, Port);
				socket.send(packet);
				
			} 
	    catch (Exception e) 
	    {
				AlertDialog.Builder alert = new AlertDialog.Builder(this);//alert ausgeben show nicht vergessen;)
	    		alert.setTitle("Fehler");// überschrift des buttons
	    		alert.setMessage("Verbindungsfehler");//Text des Buttons
	    		alert.setPositiveButton("OK", null);//Position des OK Buttons
	    		alert.show();//zeigt alert an
			}     	
			}
			
		merker = 0;
		return false;
	}
        
	}

 public void onCreate(Bundle icicle) {
        super.onCreate(icicle);	
        setContentView(R.layout.main);
        
        btn1 = (ToggleButton) findViewById(R.id.S1);	
        btn1.setOnTouchListener(this);
        btn1.setOnTouchListener(this); 
        
        btn2 = (ToggleButton) findViewById(R.id.S2);	
        btn2.setOnClickListener(this);
        btn2.setOnTouchListener(this); 
       
        btn3 = (ToggleButton) findViewById(R.id.S3);	
        btn3.setOnClickListener(this);
        btn3.setOnTouchListener(this);
        
        btn4 = (ToggleButton) findViewById(R.id.S4);	
        btn4.setOnClickListener(this);
        btn4.setOnTouchListener(this); 
        
        btn5 = (ToggleButton) findViewById(R.id.S5);	
        btn5.setOnClickListener(this);
        btn5.setOnTouchListener(this); 
...............

private static final int[] myButtonIds = { R.id.button1, R.id.button2, R.id.button3 }

(...)

for(int id : myButtonIds) {
  Button btn = (Button)findViewById(id);

(...)

public boolean onTouch(View v, MotionEvent event) {
   switch(v.getId) {
   case R.id.button1:
      (...)

Button btn = (Button)findViewById(id);