Android image animation - moving on a trajectory -

i'd have animated image in activity: white circle moving on trajectory (black line).

what best way it?

1. translate animation
2. frameanimation
3. canvas

the implementation be:

1. the white circle small imageview transparent background. placed on top of imageview (black curve).
2. frameanimation: each position of circle there separate png-image of whole screen, frame of animation.
3. use drawcircle(), , restorebackgroundimage() each movement of white dot.

so far tried frameanimation, outofmemoryerror 10 frames.

the following code implements canvas way. efficient , no oom. need change trajectory path object.

public class testview extends view {     private path path;     private paint pathpaint;     private paint dotpaint;     private long begintime;     private long duration = 3000;     private float dotradius = 3;     private pathmeasure pm;      public testview(context context) {         super(context);         init();     }      public testview(context context, attributeset attrs) {         super(context, attrs);         init();     }      public testview(context context, attributeset attrs, int defstyleattr) {         super(context, attrs, defstyleattr);         init();     }      private void init() {         path = new path();         path.moveto(0, 100);         path.lineto(100, 200);         path.lineto(200, 50);         //todo: put path here          pm = new pathmeasure(path, false);         pathpaint = new paint();         pathpaint.setargb(255, 0, 0, 0);         pathpaint.setstrokewidth(2);         pathpaint.setstyle(paint.style.stroke);         dotpaint = new paint();         dotpaint.setargb(255, 255, 255, 255);         dotpaint.setstyle(paint.style.fill);         begintime = 0;     }      @override     protected void ondraw(canvas canvas) {         canvas.drawargb(0, 0, 0, 0);         canvas.drawpath(path, pathpaint);          long currenttime = system.currenttimemillis();         float currentdistance;          if (begintime == 0) {             begintime = currenttime;             currentdistance = 0;         } else if (begintime > 0 && currenttime - begintime < duration) {             currentdistance = (float) (currenttime - begintime) / (float) duration * pm.getlength();         } else {             begintime = -1;             return;         }          float pos[] = new float[2];         pm.getpostan(currentdistance, pos, null);         canvas.drawcircle(pos[0], pos[1], dotradius, dotpaint);         invalidate();     } }