Drawing on Canvas in Android

[CodeNoob117]

I'm trying to draw a rectangle on a canvas in my own View:

public class CustomMainMenuDrawView extends View {
    Paint paint = new Paint();

    public CustomMainMenuDrawView(Context context) {
        super(context);
        paint.setColor(Color.BLACK);
    }

    @Override
    public void onDraw(Canvas canvas) {
    		paint.setColor(color.black);
    		Rect r = new Rect();
    		r.set(40, 30, 80, 100);
    		canvas.drawRect(r, paint);
    }

}

and add the view to my own activity:

public class MainActivity extends Activity {
	CustomMainMenuDrawView draw;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        
        draw = new CustomMainMenuDrawView(this);
        draw.setBackgroundColor(Color.RED);

    
    }

which works for setting a background color; however, it does not work when drawing an image. I am forcing the app to be in landscape mode and don't know if this could be having an affect. Can someone give me some advice on how to draw a shape in android? Am I suppose to use the XML file or no?

Thanks,
CodeNoob117