вы можете перезаписать OnDraw метод и использовать ..
Paint redPaint = new Paint();
redPaint.setColor(Color.WHITE);
redPaint.setStyle(Paint.Style.STROKE);
canvas.drawLine((canvas.getWidth()/2)-size-20, (canvas.getHeight()/2)-size-20, (canvas.getWidth()/2)-size-20, (canvas.getHeight()/2)+size+20, redPaint);
canvas.drawLine((canvas.getWidth()/2)+size+20, (canvas.getHeight()/2)-size-20, (canvas.getWidth()/2)-size-20, (canvas.getHeight()/2)-size-20, redPaint);
canvas.drawLine((canvas.getWidth()/2)-size-20, (canvas.getHeight()/2)+size+20, (canvas.getWidth()/2)+size+20, (canvas.getHeight()/2)+size+20, redPaint);
canvas.drawLine((canvas.getWidth()/2)+size+20, (canvas.getHeight()/2)+size+20, (canvas.getWidth()/2)+size+20, (canvas.getHeight()/2)-size-20, redPaint);
canvas.drawLine((canvas.getWidth()/2)-(size/60), (canvas.getHeight()/2)-size-20, (canvas.getWidth()/2)+(size/60), (canvas.getHeight()/2)+size+20, redPaint);
canvas.drawLine((canvas.getWidth()/2)+size+20, (canvas.getHeight()/2)-(size/60), (canvas.getWidth()/2)-size-20, (canvas.getHeight()/2)-(size/60), redPaint);
, что должно быть по размеру? –