android - canvas.scale() not working properly -

i have following code, when pinch in screen join/split objects.

import android.content.context; import android.graphics.canvas; import android.graphics.color; import android.util.attributeset; import android.util.log; import android.view.motionevent; import android.view.scalegesturedetector; import android.view.view; import android.view.scalegesturedetector.simpleonscalegesturelistener; import android.view.animation.scaleanimation; import android.widget.relativelayout;  public class gdticketgroupview extends relativelayout{  //constants int knumberoftickets = 3; int kticketwidth = 225; int kticketheight = 100; int kmarginleft = 12; int kmargintop = 12; int kmarginright = 12; int kmarginbottom = 12; float kminscale = 0.5f; float knormalscale = 1.0f; float kmaxscale = 1.2f;  //variables float mscalefactor = 1; boolean scaling = false; relativelayout gestureview; //temporary float tmpscale = 1;  //objects scalegesturedetector scalegesturedetector; gdticketview ticket;  public gdticketgroupview(context context) {     super(context);      //creating gesturedetector     scalegesturedetector = new scalegesturedetector(context, new simpleonscalegesturelistener());      //gesture view     gestureview = new relativelayout(context);     relativelayout.layoutparams params = new layoutparams(layoutparams.match_parent, layoutparams.match_parent);     gestureview.setlayoutparams(params);      //adding subviews     addtickets(context);      //only testing     setbackgroundcolor(color.red); } public gdticketgroupview(context context, attributeset attrs) {     super(context, attrs);      //creating gesturedetector     scalegesturedetector = new scalegesturedetector(context, new simpleonscalegesturelistener());      //adding subviews     addtickets(context);      //only testing     setbackgroundcolor(color.red); } public gdticketgroupview(context context, attributeset attrs, int defstyle) {     super(context, attrs, defstyle);      //creating gesturedetector     scalegesturedetector = new scalegesturedetector(context, new simpleonscalegesturelistener());      //adding subviews     addtickets(context);      //only testing     setbackgroundcolor(color.red); } @override public boolean ontouchevent(motionevent event) {     scalegesturedetector.ontouchevent(event);     return true; }    @override public void ondraw(canvas canvas) {     super.ondraw(canvas);     canvas.save();     if (scaling == true){         if (mscalefactor >= kminscale * tmpscale && mscalefactor < kmaxscale * tmpscale){             canvas.scale(knormalscale, mscalefactor);             log.d("debug", "mscalefactor >= kminscale * tmpscale && mscalefactor < kmaxscale * tmpscale"+" true");         }     }     canvas.restore();     log.d("debug", "ondraw running"); } public class simpleonscalegesturelistener extends simpleonscalegesturelistener {     @override     public boolean onscale(scalegesturedetector detector) {         mscalefactor = detector.getscalefactor();         log.d("debug", "mscalefactor "+mscalefactor+", scale running");         scaling = true;         invalidate();     return true;     }     @override     public void onscaleend(scalegesturedetector detector) {         //expand animation         if (mscalefactor >= kminscale){             scaleanimation anim = new scaleanimation(1, 1, 1, 1);             startanimation(anim);             tmpscale=1;             adjusttickets();         } else if (mscalefactor < kminscale){             scaleanimation anim = new scaleanimation(1, 1, mscalefactor, 1);             startanimation(anim);             tmpscale = kminscale;             adjusttickets();         }         scaling = false;         log.d("debug", "scale have ended");     } }    public void adjusttickets(){     //first ticket     gdticketview firstticket = (gdticketview)findviewwithtag(1);      //last ticket     gdticketview lastticket = (gdticketview)findviewwithtag(knumberoftickets);      // creating average variables            int totaly = firstticket.gettop() + lastticket.gettop();     int parcialy = totaly / (knumberoftickets - 1);      // rest of tickets     (int = 2; <= knumberoftickets - 1; i++) {         gdticketview ticketbeingadjusted = (gdticketview)findviewwithtag(i);         relativelayout.layoutparams params = new layoutparams(kticketwidth, kticketheight);         params.setmargins(kmarginleft, (i - 1) * parcialy, kmarginright, kmarginbottom);         ticketbeingadjusted.setlayoutparams(params);      } } public void addtickets(context context){     for(int = 1; <= knumberoftickets; i++){         ticket = new gdticketview(context);         relativelayout.layoutparams params = new layoutparams(kticketwidth, kticketheight);         params.setmargins(kmarginleft, kmargintop, kmarginright, kmarginbottom);         params.addrule(center_horizontal);         if (i != 1){             params.setmargins(kmarginleft, kmargintop+kticketheight, kmarginright, kmarginbottom);             gdticketview ticket = (gdticketview)findviewwithtag(i-1);             if (ticket.getid() == view.no_id){                 ticket.setid(i);             }             params.addrule(relativelayout.align_top, ticket.getid());         }         ticket.settag(i);         ticket.setbackgroundcolor(color.green);         log.d("init", "ticket view " + +" added correctly");         addview(ticket, params);     } } } 

in ondraw method, whan mscalefactor change, view don't change height, in logcat mscalefactor it's not 1 so, think don't work right.

you call these methods in order:

save() scale() restore() 

but don't draw after calling scale(). code changes scale factor , restores original scale factor of 1,1.

i see use 2 scaleanimation instances. 1 doesn't since scales 1,1 1,1. other 1 should work though.