Animation not fluent Android Wear -

i'm starting android wear , want make circle animation, making grow. know how it, think, it's doing very slow, hope can me

i have class variable

 paint manimation; 

intialized on method oncreate

manimation = new paint(paint.anti_alias_flag); manimation.setstyle(paint.style.fill); manimation.setcolor(color.green); 

and on ondraw method have

    @override     public void ondraw(canvas canvas, rect bounds) {          int width = bounds.width();         int height = bounds.height();          float centerx = width / 2f;         float centery = height / 2f;           // draw background.         canvas.drawrect(0, 0, bounds.width(), bounds.height(),               mbackgroundpaint);          canvas.drawcircle(0, centery, radiusplus, manimation);         radiusplus += 20;      } 

the animation "correct", slow, if paused.

thanks!!

edit

i found example , found why. didn't invalidate view @ end of ondraw. it's working fine. thanks.

@override     public void ondraw(canvas canvas, rect bounds) {          int width = bounds.width();         int height = bounds.height();          float centerx = width / 2f;         float centery = height / 2f;           // draw background.         canvas.drawrect(0, 0, bounds.width(), bounds.height(), mbackgroundpaint);           canvas.drawcircle(0, centery, radiusplus, manimation);         radiusplus += 5;          if (isvisible() && !isinambientmode()) {             invalidate();         }      }