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Android read from bar-code scanner

private TextView result;
private String barCode="";

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
char pressedKey = (char) event.getUnicodeChar();
if(result==null){
// System.out.println("result=null");
result=(TextView)findViewById(R.id.scanResult);
}
barCode+=pressedKey;

if(event.getKeyCode()==KeyEvent.KEYCODE_ENTER){
result.setText(barCode);
barCode="";
}
return super.onKeyDown(keyCode, event);
}

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