youtube - android URL stream cannot get whole data -

i'm trying youtube download link using this

string data = geturl("http://www.youtube.com/get_video_info?video_id=" + id); 

but return part of data. end of data "..." example,

expire%253d1391242316%2526ms%253dau%2526fexp%253d900356%25252c902546%25252c936910%252... 

i used code

public string geturl(string s){     inputstream = null;        try{          url r = new url(s);         urlconnection rc = r.openconnection();          datainputstream dis = new datainputstream(rc.getinputstream());          list<byte> l = new arraylist<byte>();          while(true){             try{                 l.add(dis.readbyte());             }catch(exception e){                 break;             }         }          byte[] b = new byte[l.size()];         for(int = 0; < l.size(); i++){             b[i] = l.get(i);         }          return new string(b,"utf-8");       }catch(exception e){          e.printstacktrace();         return null;      } } 

is there why can't whole data? can downloaded if use chrome url

http://www.youtube.com/get_video_info?video_id=itgnqbjwrsk 

it downloads whole file. streaming can't.

i stupid!. debug window value.

i logged string length , found same total file length.