canvas - Android drawing a path ON TOP of another path -

so facing weird problem in drawing app.

i drew these lines 1 8 top bottom , left right.

while i'm drawing line, shows it's drawing behind other lines. whenever let go off screen, sometimes pops front, seems random.

what overlooking draw on top of else @ times?

my drawview.java:

public class drawview extends view implements ontouchlistener {      private path path = new path();     private paint paint = new paint();      private map<path, paint> pathmap = new hashmap<path, paint>();      private boolean isscreencleared = false;      public drawview(context context) {         super(context);         this.setontouchlistener(this);          paint.setcolor(color.black);         paint.setantialias(true);         paint.setstrokewidth(5);         paint.setstyle(paint.style.stroke);         paint.setstrokejoin(paint.join.round);         paint.setstrokecap(paint.cap.round);      }      @override     public void ondraw(canvas canvas) {         if (isscreencleared) {             pathmap.clear();             canvas.drawcolor(color.white);             isscreencleared = false;         } else {             //current line             canvas.drawpath(path, paint);              //all other lines             (map.entry<path, paint> p : pathmap.entryset()) {                 canvas.drawpath(p.getkey(), p.getvalue());             }         }     }      public boolean ontouch(view view, motionevent event) {         float eventx = event.getx();         float eventy = event.gety();          switch (event.getaction()) {         case motionevent.action_down:             path = new path();             path.reset();             path.moveto(eventx, eventy);             return true;         case motionevent.action_move:             path.lineto(eventx, eventy);             break;         case motionevent.action_up:             paint newpaint = new paint();             newpaint.set(paint);             pathmap.put(path, newpaint);             break;         default:             return false;         }          invalidate();         return true;     }      public float getradius() {         return paint.getstrokewidth();     }      public void setradius(float radius) {         paint.setstrokewidth(radius);     }      public void setcolor(int color) {         paint.setcolor(color);         system.out.println("color set to: " + color);     }      public void clearscreen() {         isscreencleared = true;         invalidate();     }    } 

i instantiating drawview in mainactivity this:

relative layout = (relativelayout) findviewbyid(r.id.drawscreen);  drawview dv = new drawview(layout.getcontext()); 

don't use hashmap store paths. use vector , add new paths end. draw them , iterate through vector draw them in right order recent on top.

from hashmap docs:

note iteration order hashmap non-deterministic.