/**  * The Cap specifies the treatment for the beginning and ending of

* stroked lines and paths. The default is BUTT.  */

public enum Cap {

   /**      * The stroke ends with the path, and does not project beyond it.      */

     BUTT    (),

        /**      * The stroke projects out as a semicircle, with the center at the      * end of the path.      */

          ROUND   (),

             /**      * The stroke projects out as a square, with the center at the end      * of the path.      */

               SQUARE  ();

                 private Cap(int nativeInt) {

                        this.nativeInt = nativeInt;

                          }

                          final int nativeInt;

                          } 

* setStrokeCap(Paint.Cap cap);   

    * 当画笔样式为STROKE或FILL_OR_STROKE时，设置笔刷的图形样式，如圆形样式   

    * Cap.ROUND,或方形样式Cap.SQUARE

    *    

     * setSrokeJoin(Paint.Join join);   

    * 设置绘制时各图形的结合方式，如平滑效果等   

    paint.setStrokeJoin(Paint.Join.ROUND);

        paint.setStrokeCap(Paint.Cap.ROUND);

paint.setStrokeJoin(Paint.Join.MITER);

paint.setStrokeCap(Paint.Cap.SQUARE);