Android: Activity, View, onDraw, Canvas

Drawing on canvas overriding onDraw() method
Assuming using RelativeLayout in xml and with id "layout1"


public class SecondActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        //setContentView(new MyView(this));
        RelativeLayout layout = (RelativeLayout)(this.findViewById(R.id.layout1));
        layout.addView(new MyView(this));
    }
 
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_second, menu);
        return true;
    }
    class MyView extends View{
   public MyView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
// if required to add this custom view using xml or the graphical layout in eclipse. have to add this constructor
         public MyView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}

protected void onDraw(Canvas canvas){
    System.out.println("draw canvas");
    Paint paint = new Paint();
    paint.setColor(0xFFFF0000);
    Rect rect = new Rect();
    rect.set(100, 100, 200, 150);
    canvas.drawRect(rect, paint);
   }
    }
}