public R addParams(String key,Object value){
  if (key != null && value != null) {
    mUrlParams.put(key,value.toString());
  }
  return (R)this;
}

public R addParams ( String key , Object value ) { if ( key != null && value != null ) { mUrlParams . put ( key , value . toString ( ) ) ; } return ( R ) this ; }
add request object url params .
