Android - Stroke looks pixelated at the corners of a rounded rectangle

Why is the stroke at the corners of the rectangle so ugly? If I draw the shape in xml, it works fine (at least it works in activities, I could not test it with a widget).

Paint strokePaint = new Paint();
strokePaint.setARGB(255, 16, 23, 131);
strokePaint.setStyle(Paint.Style.STROKE);
strokePaint.setStrokeWidth(8);

enter image description here

I am testing on hdpi density. Has anyone met this problem?

Solution

Try with:

strokePaint.setAntiAlias(true)