When Extending, View invalidate() method does not call OnDraw of Android -

i know similar question has been asked multiple times questions answers deal viewgroup , not simple view class self , suggest set setwillnotdraw(false) not work in case .

public class animated_class extends view { private paint paint,paint2,paint3,paint4; private float percentage; float fangle; objectanimator ob; string month;    public void setpercentage(float percentage,string month) {     this.month=month;     this.percentage=percentage;     float p=360f;    ob=objectanimator.offloat(this,"fangle",0f,p);   ob.setduration(2000);   ob.start(); }   public void setfangle(float value) {     log.e("animation", "setfangle:" +value+" "+fangle);     this.fangle = value;    invalidate(); }    public animated_class(context context,attributeset st) {     super(context,st);     setwillnotdraw(false);       typedarray = context.gettheme().obtainstyledattributes(             st,             r.styleable.animated_class,             0, 0);      try {          percentage = a.getfloat(r.styleable.animated_class_percentage, 0);         month=a.getstring(r.styleable.animated_class_month);     } {         a.recycle();     }      paint2=new paint();     paint3=new paint();     paint4=new paint();     paint4.settextsize(50);     paint2.setantialias(true);     paint3.setantialias(true);      paint2.setargb(255,255,255,255);     paint3.setargb(255,67,187,118);    }  public animated_class(context context) {     super(context);     setwillnotdraw (false);      paint2=new paint();     paint3=new paint();     paint4=new paint();     paint4.settextsize(50);     paint2.setantialias(true);     paint3.setantialias(true);      paint2.setargb(255,255,255,255);     paint3.setargb(255,67,187,118);      }  @override protected void ondraw(canvas canvas) {      super.ondraw(canvas);           rectf rec = new rectf(170, 170, 470, 470);           canvas.drawarc(rec, 0, fangle, true, paint2);        log.e("ondraw", "inside"+fangle);    } 

}

this simple code animate formation of circle drawing arc 0 360 degree.

this log:

so here can see ondraw called twice , set method working fine setting value of fangle 0 360 ondraw not being called .

    04-25 04:34:41.676      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:0.0 0.0 04-25 04:34:41.737      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:0.0 0.0 04-25 04:34:41.902      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:6.1577725 0.0 04-25 04:34:41.908      473-473/com.example.pulkittyagi.animated_date e/ondraw﹕ inside0.0 04-25 04:34:42.159      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:37.253803 6.1577725 04-25 04:34:42.161      473-473/com.example.pulkittyagi.animated_date e/ondraw﹕ inside0.0 04-25 04:34:42.179      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:40.232426 37.253803 04-25 04:34:42.183      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:43.126938 40.232426 04-25 04:34:42.200      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:46.29702 43.126938 04-25 04:34:42.216      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:49.562428 46.29702 04-25 04:34:42.234      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:52.720783 49.562428 04-25 04:34:42.250      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:56.164543 52.720783 04-25 04:34:42.267      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:59.696617 56.164543 04-25 04:34:42.285      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:63.099342 59.696617 04-25 04:34:42.301      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:66.79556 63.099342 04-25 04:34:42.318      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:70.57257 66.79556 04-25 04:34:42.333      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:74.19863 70.57257 04-25 04:34:42.350      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:78.12458 74.19863 04-25 04:34:42.366      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:82.12312 78.12458 04-25 04:34:42.384      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:85.95028 82.12312 04-25 04:34:42.400      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:90.08165 85.95028 04-25 04:34:42.417      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:94.27712 90.08165 04-25 04:34:42.434      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:98.281715 94.27712 04-25 04:34:42.451      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:102.59308 98.281715 04-25 04:34:42.467      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:106.959625 102.59308 04-25 04:34:42.483      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:111.11699 106.959625 04-25 04:34:42.500      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:115.58175 111.11699 04-25 04:34:42.517      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:120.09245 115.58175 04-25 04:34:42.533      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:124.37693 120.09245 04-25 04:34:42.550      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:128.96759 124.37693 04-25 04:34:42.568      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:133.5947 128.96759 04-25 04:34:42.583      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:137.97981 133.5947 04-25 04:34:42.600      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:142.66812 137.97981 04-25 04:34:42.617      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:147.38298 142.66812 04-25 04:34:42.633      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:151.84183 147.38298 04-25 04:34:42.650      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:156.59874 151.84183 04-25 04:34:42.668      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:161.37236 156.59874 04-25 04:34:42.683      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:165.87738 161.37236 04-25 04:34:42.700      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:170.67365 165.87738 04-25 04:34:42.716      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:175.47658 170.67365 04-25 04:34:42.733      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:180.0 175.47658 04-25 04:34:42.750      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:184.80605 180.0 04-25 04:34:42.767      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:189.60869 184.80605 04-25 04:34:42.783      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:194.12262 189.60869 04-25 04:34:42.800      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:198.90883 194.12262 04-25 04:34:42.816      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:203.68161 198.90883 04-25 04:34:42.833      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:208.15817 203.68161 04-25 04:34:42.850      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:212.89508 208.15817 04-25 04:34:42.866      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:217.60841 212.89508 04-25 04:34:42.883      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:222.02019 217.60841 04-25 04:34:42.900      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:226.67847 222.02019 04-25 04:34:42.917      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:231.30347 226.67847 04-25 04:34:42.933      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:235.62308 231.30347 04-25 04:34:42.950      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:240.17407 235.62308 04-25 04:34:42.966      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:244.68216 240.17407 04-25 04:34:42.983      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:248.88301 244.68216 04-25 04:34:43.000      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:253.29868 248.88301 04-25 04:34:43.016      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:257.66208 253.29868 04-25 04:34:43.033      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:261.7183 257.66208 04-25 04:34:43.050      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:265.97137 261.7183 04-25 04:34:43.066      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:270.1632 265.97137 04-25 04:34:43.083      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:274.0497 270.1632 04-25 04:34:43.101      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:278.11407 274.0497 04-25 04:34:43.117      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:282.10837 278.11407 04-25 04:34:43.133      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:285.80136 282.10837 04-25 04:34:43.150      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:289.65182 285.80136 04-25 04:34:43.166      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:293.4241 289.65182 04-25 04:34:43.183      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:296.90067 293.4241 04-25 04:34:43.200      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:300.51355 296.90067 04-25 04:34:43.217      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:304.0405 300.51355 04-25 04:34:43.233      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:307.27924 304.0405 04-25 04:34:43.250      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:310.63226 307.27924 04-25 04:34:43.266      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:313.8921 310.63226 04-25 04:34:43.284      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:316.87305 313.8921 04-25 04:34:43.300      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:319.94556 316.87305 04-25 04:34:43.316      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:322.91827 319.94556 04-25 04:34:43.333      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:325.62305 322.91827 04-25 04:34:43.350      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:328.3961 325.62305 04-25 04:34:43.366      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:331.06326 328.3961 04-25 04:34:43.383      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:333.47525 331.06326 04-25 04:34:43.400      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:335.93167 333.47525 04-25 04:34:43.417      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:338.27695 335.93167 04-25 04:34:43.433      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:340.38116 338.27695 04-25 04:34:43.449      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:342.5059 340.38116 04-25 04:34:43.466      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:344.51477 342.5059 04-25 04:34:43.483      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:346.2983 344.51477 04-25 04:34:43.500      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:348.07822 346.2983 04-25 04:34:43.517      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:349.7383 348.07822 04-25 04:34:43.533      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:351.19016 349.7383 04-25 04:34:43.550      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:352.6143 351.19016 04-25 04:34:43.567      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:353.91534 352.6143 04-25 04:34:43.587      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:355.02658 353.91534 04-25 04:34:43.600      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:356.08615 355.02658 04-25 04:34:43.617      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:357.02014 356.08615 04-25 04:34:43.633      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:357.7839 357.02014 04-25 04:34:43.650      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:358.47235 357.7839 04-25 04:34:43.667      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:359.03354 358.47235 04-25 04:34:43.683      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:359.44513 359.03354 04-25 04:34:43.700      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:359.7582 359.44513 04-25 04:34:43.717      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:359.94315 359.7582 04-25 04:34:43.733      473-473/com.example.pulkittyagi.animated_date e/animation﹕ setfangle:360.0 359.94315