java - AsyncTask - onPostExecute UI confuse -

i tried figure out whats going wrong myself via search missed else, think.

i have class doinbackground checking me, , return true or false onpostexecute. debug, found out code working, param sends through functions , line-by-line working ui not updating must.

here part of code:

class check extends asynctask<void,void,boolean> {      @override     protected boolean doinbackground(void... params) {         //some code here          if(tmp.equals(ssid)){             return true;         } else {                        //little bit of code             return false;         }     }      @override     protected void onpostexecute(boolean is) {        super.onpostexecute(is);         if(is){             button state = (button) findviewbyid(r.id.state);             state.setbackgroundresource(r.drawable.shape_ringcnt);         } else {             button state = (button) findviewbyid(r.id.state);             state.setbackgroundresource(r.drawable.shape_ringnrdy);         }     } } 

i think code hided doing nothing ui of course, if else right can show hidden part.

i changed button imageview , thats it! dont know why doesnt work button, imageview , changing uri of resor