Use a scale
Transform
;
Matrix matrix = new Matrix();
matrixsetScale(2.0f, 2.0f);
path.transform(matrix);
Or, if you want to scale around the center of the path;
Matrix matrix = new Matrix();
RectF boundingBox = new RectF();
path.computeBounds(boundingBox, true);
matrix.setScale(2.0f, 2.0f, boundingBox.centerX(), boundingBox.centerY());
path.transform(matrix);
Hope this helps,
Fredrik