Cлушатель для графики OnDraw

public class RectButton extends View {
boolean isClicked = false;
Rect rect = new Rect(100, 200, 150, 250);
public RectButton(Context context) {
   super(context);
}

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    Paint paint = new Paint();
    if (isClicked)
    {
        paint.setColor(Color.RED);
    } else
    {
        paint.setColor(Color.BLACK);
    }
    canvas.drawRect(rect , paint);
}
@Override
    public boolean onTouchEvent(MotionEvent event)
    {
        int action = event.getActionMasked();

    if (action == MotionEvent.ACTION_UP)
        {
            int x = (int) event.getX();
            int y = (int) event.getY();
            if ((x > rect.left & x < rectf.right) &&
                (y > rect.top & x < rectf.bottom))
                {
                    isClicked = (isClicked)? false:true;  //нажата кнопка
                    invalidate(); //перерисуем view
                }
        }

    return true;
}
}