java - Using same code in Main and AsyncTask gives different results -

im trying progress of download using following code:

java program code:

urlconnection conn = null; url url = null; try {     url = new url("http://stackoverflow.com");     conn = url.openconnection();     conn.connect();     inputstream in = new bufferedinputstream(url.openstream());     int filesize = conn.getcontentlength();     system.out.println("file size " + filesize);     int count;     int i=0;     while ((count = in.read()) != -1) {         i++;         if(i%50000==0){//prints decimal percentage every 50000 bytes             system.out.println(((double)i)/((double)filesize));         }     }     in.close();     system.out.println("read " + + " bytes of possible " + filesize); } catch (malformedurlexception e) {     e.printstacktrace(); } catch (ioexception e) {     e.printstacktrace(); } 

when try same code in main of java application (almost) correct output:

read 191202 bytes of possible 191174

now if try , integrate asynctask of android app, using exact same code within asynctasks doinbackground() , calling asynctask in oncreate() (shown below) result

read 156846 bytes of possible 16983

so not filesize wrong in android number of bytes read in different too? im downloading same file , getting different results. have run both multiple times , both give approximately same results (stackoverflow vary in size +/-5000 bytes). can explain , me fix it?

android code:

public class mainactivity extends activity {      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);         new loaddata().execute();     }      private class loaddata extends asynctask<string, void, string> {         protected string doinbackground(string... params) {             urlconnection conn = null;             url url = null;             try {                 url = new url("http://stackoverflow.com");                 conn = url.openconnection();                 conn.connect();                 inputstream in = new bufferedinputstream(url.openstream());                 int filesize = conn.getcontentlength();                 system.out.println("file size " + filesize);                 int count;                 int i=0;                 while ((count = in.read()) != -1) {                     i++;                     if(i%50000==0){//prints decimal percentage every 50000 bytes                         system.out.println(((double)i)/((double)filesize));                     }                 }                 in.close();                 system.out.println("read " + + " bytes of possible " + filesize);             } catch (malformedurlexception e) {                 e.printstacktrace();             } catch (ioexception e) {                 e.printstacktrace();             }             return null;         }     } }