public class MainActivity extends Activity {

	Button mybtn;
	TextView mytv;
	
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

			
		mybtn = (Button) findViewById(R.id.button1);
		mybtn.setOnClickListener(ocBtn);
		
		
		mytv = (TextView) findViewById(R.id.textView1);
		
	}


	OnClickListener ocBtn = new OnClickListener() {
	       @Override
	       public void onClick(View v) {
	         // TODO Auto-generated method stub
	    	   
	    	   Runtime r = Runtime.getRuntime();
	    	   Process p = null;               //ttyO1 - идентификатор моего SerialPort-а
	    	   String cmd = "/system/xbin/su chmod 666 /dev/ttyO1";
	    	   try
	    	   {
	    		   p = r.exec(cmd);
	    		   mytv.setText(String.valueOf(p.waitFor()));
	    	   }
	    	   catch (Exception e) {
	    		 e.printStackTrace();
	    		 throw new SecurityException();
	    	   }
	       }
	     };

}

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <!-- 0x0403 / 0x6001: FTDI FT232R UART -->
    <usb-device vendor-id="1027" product-id="24577" />

    <!-- 0x0403 / 0x6015: FTDI FT231X -->
    <usb-device vendor-id="1027" product-id="24597" />

    <!-- 0x2341 / Arduino -->
    <usb-device vendor-id="9025" />

    <!-- 0x16C0 / 0x0483: Teensyduino  -->
    <usb-device vendor-id="5824" product-id="1155" />

    <!-- 0x10C4 / 0xEA60: CP210x UART Bridge -->
    <usb-device vendor-id="4292" product-id="60000" />

    <!-- 0x067B / 0x2303: Prolific PL2303 -->
    <usb-device vendor-id="1659" product-id="8963" />
</resources>

        
        <activity
            android:name="ua.radian.usbserial.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
            <meta-data
			      android:name="android.hardware.usb.action.MAIN" 
			      android:resource="@xml/device_filter" />
        </activity>

manager = (UsbManager) getSystemService(Context.USB_SERVICE);
driver = UsbSerialProber.acquire(manager);

if (driver != null)
{
   myarrayAdapter.add("Good!");  
   mylist.setAdapter(myarrayAdapter);
}