question: @ Deprecated public static String encodePostBody ( Bundle parameters , String boundary ) { if ( parameters == null ) return "" ; StringBuilder sb = new StringBuilder ( ) ; for ( String key : parameters . keySet ( ) ) { Object parameter = parameters . get ( key ) ; if ( ! ( parameter instanceof String ) ) { continue ; } sb . append ( "Content-Disposition: form-data; name=\"" + key + "\"\r\n\r\n" + ( String ) parameter ) ; sb . append ( "\r\n" + "--" + boundary + "\r\n" ) ; } return sb . toString ( ) ; }
target:  Generate the multi-part post body providing the parameters and boundary string