setStyle(Paint.Style style) Filled shape FILL, Stroke shape STROKE, or both FILL_AND_STROKE 
setColor(int color) Set the paint drawing color. You can also use setARGB(int a, int r, int g, int b and setAlpha(int alpha) 
setStrokeCap(Paint.Cap cap) Set line caps, either ROUND, SQUARE, or BUTT (none) See this. 
setStrokeJoin(Paint.Join join) Set line joins, either MITER (pointy), ROUND, or BEVEL. See this. 
setStrokeMiter(float miter) Set miter join limit. This can prevent miter join from going on indefinitively, turning it into a bevel join after x pixels. See this. 
setStrokeWidth(float width) Set stroke width. 0 will draw in hairline mode, independant of the canvas matrix. (always 1 pixel)