public class Main extends Activity {

IntentIntegrator integrator ;

private static final int WHITE = 0xFFFFFFFF;
private static final int BLACK = 0xFF000000;
LinearLayout myLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    integrator = new IntentIntegrator(this);
    myLayout = (LinearLayout)findViewById(R.id.myLayout);
  //....your code here....